simamoto/published_papers/47122414 Takafumi Katayama Tian Song Takashi Shimamoto Xiantao Jiang Reference Frame Generation Algorithm using Dynamical Learning PredNet for VVC Institute of Electrical and Electronics Engineers Inc. Digest of Technical Papers - IEEE International Conference on Consumer Electronics 0747-668X 2021- null null 20210110 10.1109/ICCE50685.2021.9427694 2-s2.0-85106029894 simamoto/published_papers/47090721 Takafumi Katayama Tian Song Takashi Shimamoto Xiantao Jiang GAN-based color correction for underwater object detection Institute of Electrical and Electronics Engineers Inc. OCEANS 2019 MTS/IEEE Seattle, OCEANS 2019 null null 20191001 10.23919/OCEANS40490.2019.8962561 2-s2.0-85079039684 simamoto/published_papers/47081855 Fumiya Kitawaki Tian Song Takafumi Katayama Xiantao Jiang Takashi Shimamoto Improvement of Cross Component Prediction by Multiple Liner Prediction for HEVC Institute of Electrical and Electronics Engineers Inc. 34th International Technical Conference on Circuits/Systems, Computers and Communications, ITC-CSCC 2019 null null 20190601 10.1109/ITC-CSCC.2019.8793327 2-s2.0-85071514192 simamoto/published_papers/47088224 Lu Wang Tian Song Takafumi Katayama Takashi Shimamoto Proposal-Aware Visual Saliency Detection with Semantic Attention Springer Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 1611-3349 11935 35 45 20190000 10.1007/978-3-030-36189-1_3 2-s2.0-85077136256 simamoto/published_papers/13799774 Takafumi Katayama 片山 貴文 Hiroki Tanaka 田中 宏樹 Tian Song 宋 天 Takashi Shimamoto 島本 隆 Saliency-Detection-Based Quantization Parameter Setting Method for HEVC 注目領域検出を用いた符号化アルゴリズムに関する研究 IEEJ Transactions on Electronics, Information and Systems 電気学会論文誌C (電子，情報，システム部門誌) 0385-4221 138 10 1185 1186 20181012 10.1541/ieejeiss.138.1185 simamoto/published_papers/13799763 Wen Shi Tian Song Takafumi Katayama Xiantao Jiang Takashi Shimamoto Hardware implementation-oriented fast intra-coding based on downsampling information for HEVC Springer Verlag Journal of Real-Time Image Processing 1861-8200 15 1 57 71 20180601 10.1007/s11554-017-0677-4 2-s2.0-85014221816 simamoto/published_papers/13799761 Takafumi Katayama Tian Song Wen Shi Xiantao Jiang Takashi Shimamoto Boundary correlation-based intracoding for SHVC algorithm and its efficient VLSI architecture Springer Verlag Journal of Real-Time Image Processing 1861-8200 15 1 107 122 20180601 10.1007/s11554-018-0786-8 2-s2.0-85047106316 simamoto/published_papers/11091293 Xiantao Jiang Xiaofeng Wang Tian Song Wen Shi Takafumi Katayama Takashi Shimamoto Jenq-Shiou Leu An efficient complexity reduction algorithm for CU size decision in HEVC ICIC International International Journal of Innovative Computing, Information and Control 1349-4198 14 1 309 322 20180201 10.24507/ijicic.14.01.309 2-s2.0-85041104998 simamoto/published_papers/11091318 Takafumi Katayama Tian Song Wen Shi Gen Fujita Xiantao Jiang Takashi Shimamoto Hardware oriented low-complexity intra coding algorithm for SHVC Institute of Electronics, Information and Communication, Engineers, IEICE IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences 1745-1337 E100A 12 2936 2947 20171201 10.1587/transfun.E100.A.2936 2-s2.0-85038207339 simamoto/published_papers/13799762 Takafumi Katayama 片山 貴文 Tian Song 宋 天 Wen Shi 石 文 Xiantao Jiang 蒋 先涛 Takashi Shimamoto 島本 隆 Fast Edge Detection and Early Depth Decision for Intra Coding of 3D-HEVC International Journal of Advances in Computer and Electronics Engineering 2456-3935 2 7 11 20 20170700 simamoto/published_papers/11091322 Xiantao Jiang Tian Song Wen Shi Takafumi Katayama Takashi Shimamoto Lisheng Wang Fast Coding Unit Size Decision Based on Probabilistic Graphical Model in High Efficiency Video Coding Inter Prediction IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS 1745-1361 E99D 11 2836 2839 20161100 10.1587/transinf.2015EDL8237 simamoto/published_papers/11091324 Xiantao Jiang Tian Song Wen Shi Takashi Shimamoto Lisheng Wang High Efficiency CU Depth Prediction Algorithm for High Resolution Applications of HEVC IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES 1745-1337 E98A 12 2528 2536 20151200 10.1587/transfun.E98.A.2528 simamoto/published_papers/11091329 Xiantao Jiang Tian Song Takashi Shimamoto Wen Shi Lisheng Wang Spatio-Temporal Prediction Based Algorithm for Parallel Improvement of HEVC IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES 1745-1337 E98A 11 2229 2237 20151100 10.1587/transfun.E98.A.2229 simamoto/published_papers/11091327 Yizhong Liu Tian Song Yiqi Zhuang Takashi Shimamoto Xiang Li Compressed Sensing Signal Recovery via Creditability-Estimation Based Matching Pursuit IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES 1745-1337 E98A 6 1234 1243 20150600 10.1587/transfun.E98.A.1234 simamoto/published_papers/11091325 SHI Wen JIANG Xiantao SONG Tian SHIMAMOTO Takashi Edge Detector Based Fast Level Decision Algorithm for Intra Prediction of HEVC J Signal Process (Web) 1880-1013 19 2 67-73 (J-STAGE)73 20150300 10.2299/jsp.19.67 simamoto/published_papers/11091334 SONG Tian ISHIKURA Naoyuki WATANABE Kenji SHIMAMOTO Takashi Efficient Architecture for Motion Vector Management of H.264/AVC Decoder for 4K Resolution UHDTV is highly required for video streaming and broadcasting. However, the computational complexity for 4K-resolution applications is still the bottleneck preventing the realization of real-time decoders. In this work, a motion vector management architecture that is designed for total motion vector management and calculation is proposed. The proposed architecture can calculate predicted motion vectors, select reference motion vectors for the direct mode, and calculate the motion vectors for interlace decoding. The proposed architecture can perform 176 cycles/MB decoding in the worst case. The simulation result shows that when working at 200 MHz, the proposed architecture can be implemented by about 99k gates. 訳: 本論文は，4Kまでの解像度をデコード可能なH.264/AVC動きベクトル管理アーキテクチャを提案している．提案アーキテクチャは，予測動きベクトルの管理と計算，ダイレクトモードの動きベクトル選択，インターレース復号のための動きベクトル計算を行う．提案アーキテクチャを実装し，合成した結果，わずか99Kのゲート実現でき，FPGAで実装した場合最大動作周波数は200MHzとなった． J Signal Process 1342-6230 16 6 611 616 20121100 10.2299/jsp.16.611 simamoto/published_papers/11091336 Tian Song Kentaro Takei Takashi Shimamoto LOW COMPLEXITY ALGORITHM FOR INTER-LAYER PREDICTION OF H.264/SVC INTERNATIONAL JOURNAL OF INNOVATIVE COMPUTING INFORMATION AND CONTROL 1349-4198 8 5A 3103 3113 20120500 simamoto/published_papers/13799775 Naoyuki Ishikura 石倉 直幸 Kentaro Takei 武井 健太郎 Tian Song 宋 天 Takashi Shimamoto 島本 隆 Fast Inter-layer Motion Estimation for Spatial Scalability of H.264/SVC In this paper, we propose an improved low complexity algorithm for spatial scalability of H.264/SVC on the basis of the motions in the sequences. First, verification is performed to confirm the redundancy of the previous motion estimation process of H.264/SVC. Then, based on the evaluation results we propose an improved algorithm for our previous work that only focuses on the complexity reduction of enhancement layer. The proposed algorithm can decrease the computation complexity of the enhancement layer using the inter layer motion prediction. The simulation results show that the proposed algorithm can achieve over 95% computation complexity reduction comparing to the original JSVM algorithm. 訳: 本論文は，H.264/SVCインターレイヤ予測に演算量削減アルゴリズムを提案している．様々な検証結果よりエンハンスメントレイヤ演算量削減の効果が大きいため，先行研究の演算量削減手法を改良し，さらにベースレイヤの演算量削減手法も提案した．参照ソフトウェアJSVMに実装しシミュレーションした結果，従来手法に比べ，符号化効率にほとんど影響なく，演算量を95%削減できた． ICIC Express Letters 1881-803X 6 2 335 340 20120200 simamoto/published_papers/11091337 LI Yi SONG Tian SHIMAMOTO Takashi Key Frame Extraction Method Based on Motion Features of H.264/AVC In this paper, we propose a novel key-frame selection algorithm for video retrieval. Firstly, the video sequences are segmented into shots with the pixel features between consecutive frames. Then, based on the MV and MVD features of H.264, we notice that MV can reflect the displacement of objects in the frames and MVD can reflect the regularity of motion. Thus, the intensity of the motion can be reflected through MV and MVD features, and key-frames are selected with the greatest intensity of motion in each shot. The experimental results show that our proposed algorithm can weaken the influence of camera motion and select key-frames from video sequences effectively. 訳: 本論文は，H.264/AVCのコンテンツからキーフレームを効率的に抽出するアルゴリズムを提案している．提案アルゴリズムは，動きベクトルの差分(MVD)を定義し，MVDとMVの特徴を調査し，動きの大きさと動き一致率を示した．この特性を利用し，動画像コンテンツの内容を正確に反映するキーフレーム抽出アルゴリズムを提案した．提案手法を実装し評価した結果，真の特徴フレームが抽出されたことが確認できた． [信号処理学会] J Signal Process 1342-6230 15 6 443 450 20111100 simamoto/published_papers/29837850 Yizhong Liu Tian Song Takashi Shimamoto High performance binarizer for H.264/AVC CABAC 2011 International Conference on Electric Information and Control Engineering, ICEICE 2011 - Proceedings 2237 2240 20110000 10.1109/ICEICE.2011.5777972 2-s2.0-79959873964 simamoto/published_papers/11091340 Takaaki Hamamoto Tian Song Takafumi Katayama Takashi Shimamoto COMPLEXITY REDUCTION ALGORITHM FOR HIERARCHICAL B-PICTURE OF H.264/SVC INTERNATIONAL JOURNAL OF INNOVATIVE COMPUTING INFORMATION AND CONTROL 1349-4198 7 1 445 457 20110100 simamoto/published_papers/11091342 LIU Yizhong SONG Tian KUNIYASU Hiroki SHIMAMOTO Takashi Hardware-Oriented Fast Estimation of Generated Bits for Rate-Distortion Optimization in H.264/AVC In order to accelerate the RDO calculation, this paper proposes a new bits estimation algorithm Fast Estimation of Generated Bits (FEGB) and the corresponding architecture to fast estimate the generated bits instead of implementing the real entropy coding in the RDO process. The proposal is based on the entropy encode tool of context-adaptive variable length coding (CAVLC). By breaking the table lookup dependency for continuous syntax elements of a coefficients block and performing the paralleled processing, the rate estimation throughput of a 4x4 block per clock cycle is achieved. The proposed architecture can work on the frequency of 250MHz with 50K standard cells consumed. 訳: 本論文は，H.264/AVCの高速なRDO処理のアーキテクチャを提案する．提案アーキテクチャは，新たなFEGBモジュールにより，生成するビット数をCAVLCを用いて高速に予測した．提案手法を実装し，シミュレーションした結果，FEGBアーキテクチャは高速な予測性能を示した．提案アーキテクチャをVerilog HDLを用いて記述し合成した結果，最大動作周波数は250MHz となり，50Kの標準セルで実装可能であった． 〔信号処理学会〕 J Signal Process 1342-6230 14 6 443 450 20101100 simamoto/published_papers/13799777 Tomohiro Akita 秋田 朋洋 Naoyuki Hirai 平井 直行 Tian Song 宋 天 Takashi Shimamoto 島本 隆 Efficient Deblocking Filter Architecture for High-Resolution Applications of H.264/AVC This paper presents an efficient deblocking-filter architecture for high-resolution applications of H.264/AVC. In this work, we try to reduce the redundant filtering process in the case of high-resolution applications with low quantization parameter (QP). We early terminate filtering process to cut down power consumption by detecting the case when all the boundary strength (BS) of 4×4 blocks for one macroblock are zero. An efficient architecture that can realize these two proposals is also proposed. Simulation results show that there is a maximum 90% reduction in the filtering calculations and 87% of BS calculation. Low power implementation can be realized with the proposed architecture. 訳: 本論文は，高解像度H.264/AVCのデブロッキングフィルタの高速アーキテクチャを提案している．提案手法は，フィルタリング処理のサイクル数を削減し，全体の消費電力の削減を目標とした．BS処理に冗長があるため，BS処理の必要性をあらかじめ計算し，BS処理のサイクル数を削減した．提案手法を実装しシミュレーションした結果，最大90%のフィルタ処理削減と87%のBS処理サイクル数削減を実現した． ICIC Express Letters 1881-803X 4 5(A) 1709 1715 20101000 simamoto/published_papers/13799776 Kentaro Takei 武井 健太郎 Takafumi Katayama 片山 貴文 Tian Song 宋 天 Takashi Shimamoto 島本 隆 Complexity Reduction Algorithm for Enhancement Layer of H.264/SVC The inter-layer prediction of H.264/SVC can help to improve the coding efficiency as well as the computation complexity. Proposed algorithm focuses on the reduction of the candidate modes by making use of the correlations of the encoding cost between the base layer and enhancement layers. For macroblock with collocated macroblock coded by INTRA or INTER type, two algorithms are proposed, respectively. Both algorithms efficiently decrease the redundant candidate modes by estimating from the base layer coding information. The experiment results show that proposed algorithm can significantly reduce redundant computation complexity with almost no coding efficiency loss. 訳: 本論文は，H.264/SVCインターレイヤ予測のモード選択手法を提案している．提案手法は，符号化コストの相関性を利用して予測用候補モードを削減し，演算量削減を図った．イントラモードとインターモードの候補モードに対し，新たなアルゴリズムを提案し，その組み合わせで演算量削減を実現した．参照ソフトウェアに実装しシミュレーションした結果，符号化効率にほとんど影響なく，大幅な演算量が削減できた． ICIC Express Letters 1881-803X 4 5(B) 1965 1972 20101000 simamoto/published_papers/11091343 Yizhong Liu Tian Song Takashi Shimamoto A High-Throughput Binary Arithmetic Coding Architecture for H.264/AVC CABAC IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES 1745-1337 E93A 9 1594 1604 20100900 10.1587/transfun.E93.A.1594 simamoto/published_papers/13799764 Naoyuki Hirai Tian Song Yizhong Liu Takashi Shimamoto A Novel Spiral-Type Motion Estimation Architecture for H.264/AVC JOURNAL OF SEMICONDUCTOR TECHNOLOGY AND SCIENCE 1598-1657 10 1 37 44 20100300 simamoto/published_papers/13799778 Takaaki Hamamoto Takafumi Katayama Tian Song 宋 天 Takashi Shimamoto 島本 隆 Low Complexity Mode Selection Method for Hierarchical B-picture of H.264/SVC In this paper, a novel mode selection method for hierarchical B-picture of H.264/SVC is proposed. Observing the correlation in multi-layer structures, we find that the mode selection process has much redundancy. In particular, the redundant modes have essential relation with the encoding layers. On the basis of this feature, we propose a novel mode selection method that can significantly reduce the redundant candidate modes. Simulation results show that the proposed method can achieve high computation complexity with very slight PSNR loss. 訳: 本論文は，H.264/SVCの階層的Bピクチャのモード選択手法を提案している．提案手法は，各階層間のモードの相関関係を利用し，符号化モードの削減を実現した．特に，各階層において冗長な符号化モードを分析し，冗長性を削減した．これらの特徴を利用し，新たなモード選択アルゴリズムを提案した．参照ソフトウェアに実装しシミュレーションした結果，符号化効率にほとんど影響なく，大幅に演算量を削減できた． ICIC Express Letters 3 4(A) 1179 1184 20091200 simamoto/published_papers/13799767 Tian Song Yoshinori Hayashi Takashi Shimamoto FAST DEBLOCKING FILTER IMPLEMENTATION METHOD FOR H.264/AVC INTERNATIONAL JOURNAL OF INNOVATIVE COMPUTING INFORMATION AND CONTROL 1349-4198 5 11A 3983 3993 20091100 simamoto/published_papers/13799766 Tian Song Shinpei Matsuoka Yoshitaka Morigami Takashi Shimamoto CODING EFFICIENCY IMPROVEMENT WITH ADAPTIVE GOP SELECTION FOR H.264/SVC INTERNATIONAL JOURNAL OF INNOVATIVE COMPUTING INFORMATION AND CONTROL 1349-4198 5 11B 4155 4165 20091100 simamoto/published_papers/29806822 Hiroki Kozu Hiroki Kuniyasu Tian Song Takashi Shimamoto Spatial-temporal correlation based mode decision algorithm for H.264/AVC Digest of Technical Papers - IEEE International Conference on Consumer Electronics 0747-668X 647 650 20090000 10.1109/ISCE.2009.5156988 2-s2.0-70350217914 simamoto/published_papers/13799779 Tian Song Tomoyuki Kishida Takashi Shimamoto Fast frame memory access method for H.264/AVC IEICE ELECTRONICS EXPRESS 1349-2543 5 9 344 348 20080500 10.1587/elex.5.344 simamoto/published_papers/13799770 Tian Song 宋 天 Kosuke Saito Takashi Shimamoto 島本 隆 Efficient Variable Block Size Motion Estimation Architecture for Real-Time Rate Distortion Optimization of H.264/AVC Encoder In this paper, novel motion estimation architecture for H.264/AVC is proposed. To reduce the computational complexity of RDO calculation, we propose a TAD+top-down method that can efficiently reduce the number of candidate coding modes. The TAD+top-down method is a hardware-friendly method that can easily be implemented on the basis of traditional motion estimation architectures. The proposed architecture can support variable search- range motion estimation in the range of 0 to ±16. The experimental results show that the proposed method can reduce the computation complexity by about 80% without PSNR and bit rate loss compared with the reference software JM8.2. 訳: 本論文は，H.264/AVCの可変ブロックサイズの動き探索アルゴリズムを提案している．まず，空間方向のフレームのブロックサイズを用いて現在の符号化ブロックのサイズを予測する方法を提案した．次にトップダウン手法に基づいたブロックサイズ選択アルゴリズムを提案した．参照ソフトウェアJM8に実装しシミュレーションした結果，従来手法に比べ平均80%の演算量の削減を実現できた． 〔信号処理学会〕 Journal of Signal Processing 1342-6230 11 6 453 459 20071100 simamoto/published_papers/13799771 Tian Song 宋 天 Takashi Shimamoto 島本 隆 Motion Area Estimated Motion Estimation with Triplet Search Patterns for H.264/AVC In this paper a fast motion estimation method for H.264/AVC named Triplet Search Motion Estimation (TS-ME) is proposed. The proposed algorithm separates the motion search process to several steps but with some new features. First, the proposed algorithm try to search the real motion area using proposed triplet patterns instead of some selected search points to avoid dropping into the local minimum. Then, in the localized motion area a novel 3-step motion search algorithm is performed. From the simulation results, motion estimation speed improved by a factor of up to 38 when using proposed algorithm than that of the reference software of H.264/AVC with ignorable picture quality loss. 訳: 本論文は，H.264/AVCの動き探索に新たな三角領域を基にした探索アルゴリズムを提案している．提案手法は従来手法と異なり，可能性の高い探索点を絞るのではなく，三角パターンを用いてベスト探索領域を決める．次に，決められた探索領域に新たな3ステップの探索手法を提案した．参照ソフトウェアに実装しシミュレーションした結果，高い符号化効率を実現するとともに演算量も大幅に削減できた． International Journal of Signal Processing(IJSP) 4 1 67 76 20070300 simamoto/published_papers/11091355 Tian Song Takashi Shimamoto Reference frame data compression method for H.264/AVC IEICE ELECTRONICS EXPRESS 1349-2543 4 3 121 126 20070200 10.1587/elex.4.121 simamoto/published_papers/47689666 Tian Song Kazuhiro Ogata Kosuke Saito Takashi Shimamoto Adaptive search range motion estimation algorithm for H.264/AVC Institute of Electrical and Electronics Engineers Inc. Proceedings - IEEE International Symposium on Circuits and Systems 0271-4310 3956 3959 20070000 10.1109/iscas.2007.378666 2-s2.0-34548848259 simamoto/published_papers/11091356 M Hashizume T Matsushima T Shimamoto H Yotsuyanagi T Tamesada A Sakamoto Genetic state reduction method of incompletely specified machines IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES 1745-1337 E87A 6 1555 1563 20040600 simamoto/published_papers/29647904 Yuichi Tanji Yoshifumi Nishio Takashi Shimamoto Akio Ushida Method for analysis of transmission line networks using frequency response approximation Scripta Technica Inc Electronics and Communications in Japan, Part III: Fundamental Electronic Science (English translation of Denshi Tsushin Gakkai Ronbunshi) 1042-0967 84 3 81 90 20010000 10.1002/1520-6440(200103)84:3<81::AID-ECJC9>3.0.CO;2-M 2-s2.0-0035151261 simamoto/published_papers/11091358 マルチデコードGAを用いた最大独立集合問題の解法 電子情報通信学会論文誌A Trans.IEICE J83-A 12 1505 1511 20000000 simamoto/published_papers/13799772 Xingzhao Liu 劉 興針 Akio Sakamoto 坂本 明雄 Takashi Shimamoto 島本 隆 A Modified Genetic Approach for Maximum Inependent Set Problems Genetic algorithms have been shown to be very useful in a variety of optimization problems. In this paper we present a modified genetic algorithm for maximum independent set problem. A specially designed mutation operator is adopted to search the solution space more efficiently, where adjacent relation of a graph is integrated. The DIMACS benchmark graphs are used to test our algorithm, and the results show that the algorithm outperforms our previous version. Moreover two new low bounds are found for graphs in DIMACS. 訳: 本論文は，遺伝的アルゴリズムを用いて，グラフの最大独立集合を求める手法を提案している．最大独立集合問題とは，グラフにおいて，どの2節点間にも枝が存在しない節点集合の最大を見つける問題であり，工学的な最適化問題の多くが帰着できる問題として重要視されている．本論文では先の論文の手法を改良し，DIMACS ベンチマークグラフに適用し，従来手法より良い解が求められることを示した． Journal of Harbin Institute of Technology 6 2 5 10 19990600 simamoto/published_papers/11091359 Yuichi Tanji 丹治 裕一 Yoshifumi Nishio 西尾 芳文 Takashi Shimamoto 島本 隆 Akio Ushida 牛田 明夫 A Method for Analysis of Transmission Line Neworks Using Frequency Response Approximation 周波数応答の近似を用いた伝送線路回路網の一解析手法 伝送線路回路網の離散フーリエ変換に基づく方法では，考慮すべき周波数成分の数は回路網の有効周波数と入力電源が制限される時間に依存する．したがって，解析される回路網の有効周波数が同じ場合でも入力電源が長時間にわたる場合には，多くの周波数成分を必要とし演算効率が悪くなるという欠点をもつ．これは，各周波数での応答を求めるために回路方程式をそのたびごとに求解 しなければならないことが原因である．本論文では，回路方程式の求解を最小限にとどめ，代わりに周波数応答を近似する方法を提案している．近似法としては，3次スプライン関数による方法と離散フーリエ変換・逆変換による方法を用いており，数値計算例を通して，比較的小規模な問題に対しては高速シミュレーション手法として知られているモーメント・マッチング法と比較して演算効率が優れていることが示されている． The Institute of Electronics, Information and Communication Engineers 一般社団法人電子情報通信学会 The Transactions of the Institute of Electronics, Information and Communication Engineers A 電子情報通信学会論文誌A Trans.IEICE 0913-5707 J82-A 1 47 55 19990125 simamoto/published_papers/11091360 Yuichi Tanji 丹治 裕一 Yoshifumi Nishio 西尾 芳文 Takashi Shimamoto 島本 隆 Akio Ushida 牛田 明夫 Efficient Curve Fitting Technique for Analysis of Interconnect Networks with Frequency-Dependent Parameters Analysis of frequency-dependent lossy transmission lines is very important for designing the high-speed VLSI, MCM and PCB. The frequency-dependent parameters are always obtained as tabulated data. In this paper, a new curve fitting technique of the tabulated data for the moment matching technique in the interconnect analysis is presented. This method based on Chebyshev interpolation enhances the efficiency of the moment matching technique. 訳: 導体を流れる電流は，周波数の増大とともに導体表面のみに流れる (表皮効果)．導体間が接近している場合には，接近している側に集中する傾向がある(近接効果)．それゆえ，マイクロ波集積回路など高周波で動作する回路の配線は，周波数依存性を有している．本論文では，伝送線路の高速シミュレーション技法として知られるモーメント・マッチング法を，周波数依存性を有する伝送線路解析へと拡張を行った．その本質は，線路パラメータを複素数 s の多項式によって近似することである．そこで，チェビシェフ多項式による高精度な近似法を提案した．これにより，正確かつ高速なシミュレーションが可能となった． Trans.IEICE 0916-8508 E81-A 12 2501 2508 19981225 simamoto/published_papers/11091361 M Hashizume T Tamesada T Shimamoto A Sakamoto Heuristic state reduction methods of incompletely specified machines preceding to satisfy covering condition IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES 1745-1337 E81A 6 1045 1054 19980600 simamoto/published_papers/13799773 A Sakamoto XZ Liu T Shimamoto A genetic approach for maximum independent set problems IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES 1745-1337 E80A 3 551 556 19970300 simamoto/published_papers/11091363 林 昌之 築山 修治 島本 隆 白川 功 アルングスリサングチャイ イティチャイ A Routing System for Multi-Chip Modules マルチチップモジュール向き高速配線システム 電気製品の高機能化に伴い，組み込まれる電子回路も大規模・高密度になっている．これらを実現する一手法に，マルチチップモジュールがあり，設計されたLSI等をプリント基板上に並べるのではなく，LSIチップをパッケージングせずに基盤上に配置する手法が考案されている．本論文は，このマルチチップモジュールを対象とし，大規模多層マルチチップモジュールを高速に配線できうる新しい配線システムを提案した． 回路実装学会誌 1341-0571 11 2 126 132 19960225 10.5104/jiep1995.11.126 simamoto/published_papers/11091364 A SAKAMOTO XZ LIU T SHIMAMOTO A MODIFIED GENETIC CHANNEL ROUTER IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES 1745-1337 E77A 12 2076 2084 19941200 simamoto/published_papers/11091366 XZ LIU A SAKAMOTO T SHIMAMOTO GENETIC CHANNEL ROUTER IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES 1745-1337 E77A 3 492 501 19940300 simamoto/published_papers/11091367 XZ LIU A SAKAMOTO T SHIMAMOTO RESTRICTIVE CHANNEL ROUTING WITH EVOLUTION PROGRAMS IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES 1745-1337 E76A 10 1738 1745 19931000 simamoto/published_papers/11091370 T SHIMAMOTO SHIRAKAWA, I H HANE N YUI N NISHIGUCHI A DISTRIBUTED ROUTING SYSTEM FOR MULTILAYER SOG IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES 1745-1337 E76A 3 370 376 19930300 simamoto/published_papers/29565574 Takashi Shimamoto Akio Sakamoto An approach to channel routing problem using neural networks Electronics and Communications in Japan (Part III: Fundamental Electronic Science) 1520-6440 73 8 52 63 19900000 10.1002/ecjc.4430730806 2-s2.0-0025465760 simamoto/published_papers/11091375 Takashi Shimamoto 島本 隆 Akio Sakamoto 坂本 明雄 Neural Computation for Channel Routing Using Hopfield Neural Network Model This paper describes how channel routing problem can be solved by a neural network model proposed by Hopfield. A brief summary of Hopfield neural network model, how to construct a neural network for solving channel routing problem, and results of digital computer simulation are described. Our results show that the neural network could provide good solutions of channel routing problem. For example, it computes a solution of the number of horizontal tracks 31 for the &quot;difficult example&quot; and by using simple compaction algorithm the solution can be improved to 28, which is optimal within our channel routing strategy. 訳: 生物の神経系のダイナミクスを模倣したニューラルネットワークが提案され，最適化問題への適用が発表されている．本論文は，ニューラルネットワークをLSI内部の配線手法であるチャネル配線に適用した論文であり，できるだけ少ないトラックを利用して配線する目的関数を導入し，配線結果の質を向上させた．その結果 difficult example と呼ばれる大規模な結線要求に対しても最適解が得られたことを報告している． Trans. IEICE E72 12 1360 1366 19891201 simamoto/published_papers/29561578 Takashi Shimamoto Akio Sakamoto Cycle breaking and longest path in channel routing problem Electronics and Communications in Japan (Part III: Fundamental Electronic Science) 1520-6440 72 11 20 28 19890000 10.1002/ecjc.4430721103 2-s2.0-0024766552 simamoto/published_papers/29553444 Takashi Shimamoto Akio Sakamoto Akio Ushida On routability for channel routing problem Electronics and Communications in Japan (Part I: Communications) 1520-6424 70 4 25 34 19870000 10.1002/ecja.4410700403 2-s2.0-0023332287 simamoto/misc/10757532 Takafumi Katayama Koki Tamura Tian Song 宋 天 Takashi Shimamoto 島本 隆 Fast Object Detection Algorithm using Encoded Video Information IEEE CASS Shanghai and Shikoku Chapters Joint Workshop on Circuits and Systems (SSJW'18) null null 20181106 simamoto/misc/10757533 Takafumi Katayama Tian Song 宋 天 Takashi Shimamoto 島本 隆 QP Adaptation Algorithm for Low Complexity HEVC based on a CNN-Generated Header Bits Map Proceedings of IEEE 8th International Conference of Consumer Electronics in Berlin (ICCE-Berlin) null null 20180903 simamoto/misc/10757536 Takafumi Katayama Koki Tamura Tian Song 宋 天 Takashi Shimamoto 島本 隆 Efficient Object Detection Algorithm using Encoded Video Information Proceedings of Taiwan and Japan Conference on Circuits and Systems (TJCAS2018) null null 20180803 simamoto/misc/10757535 Shota Yusa Takafumi Katayama Tian Song 宋 天 Takashi Shimamoto 島本 隆 Fast PU Size Decision Algorithm Using RD-Cost and Depth Dispersion for Depth Intra Coding of 3D-HEVC Proceedings of Taiwan and Japan Conference on Circuits and Systems (TJCAS2018) null null 20180803 simamoto/misc/10757534 Koki Tamura Takafumi Katayama Tian Song 宋 天 Takashi Shimamoto 島本 隆 Multi-line Intra Prediction for Inter-Layer Reference in SHVC Proceedings of Taiwan and Japan Conference on Circuits and Systems (TJCAS2018) null null 20180803 simamoto/misc/10757538 Akinori Sanda Kunihito Hatai Ryota Fujiki Takafumi Katayama Tian Song 宋 天 Takashi Shimamoto 島本 隆 Fast Object Detection System Based on the Embedded Information in the Bitstream Proceedings of International Technical Conference on Circuits/Systems, Computers and Communications(ITC-CSCC2018) null null 20180705 simamoto/misc/10757537 Kunihito Hatai Ryota Fujiki Akinori Sanda Wen Shi Takafumi Katayama Tian Song 宋 天 Takashi Shimamoto 島本 隆 Learning Library Extension for Sea Cucumber Recognition using GANs Proceedings of International Technical Conference on Circuits/Systems, Computers and Communications(ITC-CSCC2018) null null 20180705 simamoto/misc/8005141 Takafumi Katayama Kazuki Kuroda Wen Shi Tian Song Takashi Shimamoto Low-complexity intra coding algorithm based on convolutional neural network for HEVC Institute of Electrical and Electronics Engineers Inc. 2018 International Conference on Information and Computer Technologies, ICICT 2018 2018 ICICT 115 118 20180509 10.1109/INFOCT.2018.8356852 2-s2.0-85048375374 simamoto/misc/10757539 Takafumi Katayama Kazuki Kuroda Wen Shi Tian Song Takashi Shimamoto Low-complexity intra coding algorithm based on convolutional neural network for HEVC Institute of Electrical and Electronics Engineers Inc. 2018 International Conference on Information and Computer Technologies, ICICT 2018 115 118 20180509 10.1109/INFOCT.2018.8356852 2-s2.0-85048375374 simamoto/misc/8005142 Kazuki Kuroda Takafumi Katayama Tian Song Takashi Shimamoto Early mode selection of high resolution for HEVC base on bits-mapping Institute of Electrical and Electronics Engineers Inc. 2018 IEEE International Conference on Consumer Electronics, ICCE 2018 2018- ICCE 1 6 20180326 10.1109/ICCE.2018.8326120 2-s2.0-85048832181 simamoto/misc/8005140 Takafumi Katayama Wen Shi Tian Song Takashi Shimamoto Pixel-based fast CU depth decision algorithm with edge strength for HEVC Institute of Electrical and Electronics Engineers Inc. 2018 IEEE International Conference on Consumer Electronics, ICCE 2018 2018- ICCE 1 6 20180326 10.1109/ICCE.2018.8326245 2-s2.0-85048814659 simamoto/misc/8005139 Yoshiki Ito Tian Song Wen Shi Takafumi Katayama Takashi Shimamoto Hardware-oriented low complexity motion estimation for HEVC Institute of Electrical and Electronics Engineers Inc. 2018 IEEE International Conference on Consumer Electronics, ICCE 2018 2018- ICCE 1 5 20180326 10.1109/ICCE.2018.8326135 2-s2.0-85048797519 simamoto/misc/8005138 Wen Shi Takafumi Katayama Tian Song Takashi Shimamoto Efficient intra prediction based on adaptive downsampling signal for parallel HEVC encoding Institute of Electrical and Electronics Engineers Inc. 2018 IEEE International Conference on Consumer Electronics, ICCE 2018 2018- ICCE 1 4 20180326 10.1109/ICCE.2018.8326253 2-s2.0-85048802318 simamoto/misc/10757542 Ryota Fujiki Yuhki Yano Tian Song 宋 天 Takashi Shimamoto 島本 隆 Nobutatsu Nakamura Training Library Generation for Automatic Sea Cucumber Recognition Proceedings of International Technical Conference on Circuits/Systems, Computers and Communications(ITC-CSCC2017) null null 20170704 simamoto/misc/10757541 Shota Yusa Takafumi Katayama Wen Shi Tian Song 宋 天 Takashi Shimamoto 島本 隆 Fast CU Depth Decision Algorithm Using Depth-Map for 3D-HEVC Proceedings of International Technical Conference on Circuits/Systems, Computers and Communications(ITC-CSCC2017) null null 20170704 simamoto/misc/10757540 Koki Tamura Takafumi Katayama Wen Shi Tian Song 宋 天 Takashi Shimamoto 島本 隆 Coding Efficiency Improvement Algorithm for Inter-Layer Reference Prediction in SHVC Proceedings of International Technical Conference on Circuits/Systems, Computers and Communications(ITC-CSCC2017) null null 20170704 simamoto/misc/10757545 Yoshiki Ito 伊藤 良樹 Wen Shi 石 文 Tian Song 宋 天 Takashi Shimamoto 島本 隆 An Adaptive Search Range Selection Algorithm for HEVC Proceedings of International Technical Conference on Circuits/Systems, Computers and Communications(ITC-CSCC2016) null null 20160710 simamoto/misc/10757544 Ryo Kuroda 黒田 諒 Wen Shi 石 文 Tian Song 宋 天 Takashi Shimamoto 島本 隆 Hardware Oriented Early CU Splitting Algorithm by Coding Unit Feature Analysis for HEVC Proceedings of International Technical Conference on Circuits/Systems, Computers and Communications(ITC-CSCC2016) null null 20160710 simamoto/misc/10757543 Kazuki Kuroda 黒田 一樹 Takafumi Katayama 片山 貴文 Tian Song 宋 天 Takashi Shimamoto 島本 隆 Adaptive Mode Selection for Low Complexity Enhancement Layer Encoding of SHVC Proceedings of International Technical Conference on Circuits/Systems, Computers and Communications(ITC-CSCC2016) null null 20160710 simamoto/misc/10757547 Wen Shi 石 文 Xiantao Jiang 蒋 先涛 Tian Song 宋 天 Jenq-Shiou Leu Takashi Shimamoto 島本 隆 Downsampled Information Based Low Complexity Intra Coding for HEVC Proceedings of 2nd International Forum on Advanced Technologies (IFAT2016) null null 20160307 simamoto/misc/10757546 Takafumi Katayama 片山 貴文 Wen Shi 石 文 Tian Song 宋 天 Jenq-Shiou Leu Takashi Shimamoto 島本 隆 Fast CU Size Decision for Intra Coding Algorithm in SHVC Proceedings of 2nd International Forum on Advanced Technologies (IFAT2016) null null 20160307 simamoto/misc/37295066 片山 貴文 石 文 宋 天 島本 隆 Low-Complexity Intra Coding Algorithm in Enhancement Layer for SHVC (マルチメディアストレージ コンシューマエレクトロニクス ヒューマンインフォメーション メディア工学 映像表現&コンピュータグラフィックス) 映像情報メディア学会 映像情報メディア学会技術報告 = ITE technical report 1342-6893 40 6 159 162 20160200 simamoto/misc/8005453 Takafumi Katayama Wen Shi Tian Song Takashi Shimamoto Low-Complexity Intra Coding Algorithm in Enhancement Layer for SHVC 2016 IEEE INTERNATIONAL CONFERENCE ON CONSUMER ELECTRONICS (ICCE) 2016 ICCE 419-422 null 20160000 10.1109/ICCE.2016.7430673 simamoto/misc/8005452 Takafumi Katayama Wen Shi Tian Song Takashi Shimamoto Jenq-Shiou Leu Reference Frame Selection Algorithm of HEVC Encoder for Low Power Video Device 2016 2ND INTERNATIONAL CONFERENCE ON INTELLIGENT GREEN BUILDING AND SMART GRID (IGBSG) 2016 IGBSG 34 39 20160000 10.1109/IGBSG.2016.7539416 simamoto/misc/8005451 Takafumi Katayama Wen Shi Tian Song Takashi Shimamoto Early Depth Determination Algorithm for Enhancement Layer Intra Coding of SHVC PROCEEDINGS OF THE 2016 IEEE REGION 10 CONFERENCE (TENCON) 2016 TENCON 3079 3082 20160000 10.1109/TENCON.2016.7848614 simamoto/misc/10757549 Wen Shi 石 文 Tian Song 宋 天 Takashi Shimamoto 島本 隆 High Efficiency Intra Coding Extension for HEVC/H.265 IEEE CASS Shikoku and Malaysia Chapters Joint Seminar null null 20151005 simamoto/misc/10757552 Wen Shi 石 文 Xiantao Jiang 蒋 先涛 Tian Song 宋 天 Jenq-Shiou Leu Takashi Shimamoto 島本 隆 Spatial Locality Based Parallel Scheme for Intra Coding of HEVC Tenth International Conference on Innovative Computing, Information and Control (ICICIC2015) null null 20150820 simamoto/misc/10757553 Jin Ikegita 池北 迅 Xiantao Jiang 蒋 先涛 Tian Song 宋 天 Jenq-Shiou Leu Takashi Shimamoto 島本 隆 Efficient Prediction Motion Vector Candidate Selection Algorithm for HEVC The 30th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC2015) null null 20150629 simamoto/misc/10757554 Takuya Hamada 濵田 拓弥 Yutaroh Tanida 谷田 祐太郎 Wen Shi 石 文 Tian Song 宋 天 Jenq-Shiou Leu Takashi Shimamoto 島本 隆 Original Pixel Based Parallel Algorithm for Intra Prediction of HEVC The 30th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC2015) null null 20150600 10.1109/APCCAS.2014.7032708 simamoto/misc/10757558 Xiantao Jiang 蒋 先涛 Tian Song 宋 天 Jenq-Shiou Leu Takashi Shimamoto 島本 隆 High Efficiency Inter CU Size Prediction Algorithm for HEVC Proceedings of International Forum on Advanced Technologies (IFAT2015) null null 20150309 simamoto/misc/10757557 Wen Shi 石 文 Xiantao Jiang 蒋 先涛 Tian Song 宋 天 Jenq-Shiou Leu Takashi Shimamoto 島本 隆 Efficient Intra Coding for HEVC Based on Spatial Locality Proceedings of International Forum on Advanced Technologies (IFAT2015) null null 20150309 simamoto/misc/10757556 Xiantao Jiang Tian Song Wen Shi Lisheng Wang Takashi Shimamoto Merge Prediction Algorithm for Adaptive Parallel Improvement of High Efficiency Video Coding 2015 IEEE INTERNATIONAL CONFERENCE ON CONSUMER ELECTRONICS - TAIWAN (ICCE-TW) 310 311 20150000 10.1109/ICCE-TW.2015.7216916 simamoto/misc/10757555 Wen Shi Xiantao Jiang Tian Song Takashi Shimamoto Spatial Locality Based Supplemental Modes for Intra Prediction of HEVC 2015 IEEE INTERNATIONAL CONFERENCE ON CONSUMER ELECTRONICS - TAIWAN (ICCE-TW) 298 299 20150000 10.1109/ICCE-TW.2015.7216908 simamoto/misc/10757551 Wen Shi Xiantao Jiang Tian Song Takashi Shimamoto Segmental Downsampling Intra Coding Based on Spatial Locality for HEVC 2015 IEEE 5TH INTERNATIONAL CONFERENCE ON CONSUMER ELECTRONICS - BERLIN (ICCE-BERLIN) 12 16 20150000 10.1109/ICCE-Berlin.2015.7391211 simamoto/misc/10757550 Masashi Tomida Yutaro Tanida Tian Song Takashi Shimamoto Small Area VLSI Architecture for Deblocking Filter of HEVC 2015 IEEE 5TH INTERNATIONAL CONFERENCE ON CONSUMER ELECTRONICS - BERLIN (ICCE-BERLIN) 294 297 20150000 10.1109/ICCE-Berlin.2015.7391262 simamoto/misc/10757548 Xiantao Jiang Tian Song Wen Shi Lisheng Wang Takashi Shimamoto High Efficiency CU Depth Decision Algorithm for High Resolution Application of HEVC TENCON 2015 - 2015 IEEE REGION 10 CONFERENCE 2159-3442 null null 20150000 10.1109/TENCON.2015.7372810 simamoto/misc/10757564 Wen Shi 石 文 Xiantao Jiang 蒋 先涛 Tian Song 宋 天 Takashi Shimamoto 島本 隆 Edge Detector Based Fast Level Decision Algorithm for Intra Prediction of HEVC Proceedings of International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP'14) null null 20140301 10.2299/jsp.19.67 simamoto/misc/10757563 Xiantao Jiang Tian Song Takashi Shimamoto Lisheng Wang High Efficiency Video Coding (HEVC) Motion Estimation Parallel Algorithms on GPU 2014 IEEE INTERNATIONAL CONFERENCE ON CONSUMER ELECTRONICS - TAIWAN (ICCE-TW) null null 20140000 10.1109/ICCE-TW.2014.6904012 simamoto/misc/10757562 Gustavo Sanchez Mario Saldanha Gabriel Balota Bruno Zatt Marcelo Porto Luciano Agostini A Complexity Reduction Algorithm for Depth Maps Intra Prediction on the 3D-HEVC 2014 IEEE VISUAL COMMUNICATIONS AND IMAGE PROCESSING CONFERENCE 137 140 20140000 simamoto/misc/10757561 Xiantao Jiang Tian Song Takashi Shimamoto Wen Shi Lisheng Wang Temporal Prediction Improvement for Parallel Processing of HEVC 2014 IEEE ASIA PACIFIC CONFERENCE ON CIRCUITS AND SYSTEMS (APCCAS) 515 518 20140000 10.1109/APCCAS.2014.7032832 simamoto/misc/10757560 Xiantao Jiang Tian Song Takashi Shimamoto Lisheng Wang AMVP Prediction Algorithm for Adaptive Parallel Improvement of HEVC 2014 IEEE ASIA PACIFIC CONFERENCE ON CIRCUITS AND SYSTEMS (APCCAS) 511 514 20140000 10.1109/APCCAS.2014.7032831 simamoto/misc/10757559 Wen Shi Xiantao Jiang Tian Song Takashi Shimamoto Edge Information Based Fast Selection Algorithm for Intra Prediction of HEVC 2014 IEEE ASIA PACIFIC CONFERENCE ON CIRCUITS AND SYSTEMS (APCCAS) 17 20 20140000 10.1109/APCCAS.2014.7032708 simamoto/misc/10757566 Yuto Nagao Naozumi Ogawa 小川 直純 Naoyuki Ishikura 石倉 直幸 Tian Song 宋 天 Takashi Shimamoto 島本 隆 Fast Motion Estimation for Spatial Scalability of H.264/SVC Proceedings of International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP'13) null null 20130304 simamoto/misc/35276971 Song Tian 宋 天 Miki Takuya 三木 拓也 Shimamoto Takashi 島本 隆 High Efficient Intra Coding Algorithm for H.265/HVC H.265/HVC における高性能符号化アルゴリズムに関する研究 This work proposes a novel INTRA coding algorithm which can achieve high coding efficiency using temporal-spatial prediction for H.264/AVC. The proposed prediction algorithm can compensate the weak point of individual usage of spatial or temporal prediction. Firstly, a new prediction block is selected in the temporal previous frame. Next, the selected block in the previous frame is used as the reference data to perform spatial prediction with the same reference direction as traditional INTRA modes. The coding process can also be reconstructed in decoder side without additional bit transfer. The simulation results show that the proposed new INTRA modes can achieve about 1dB improvement than the original H.264/AVC. The University of Tokushima 徳島大学 Bulletin of Institute of Technology and Science the University of Tokushima 徳島大学大学院ソシオテクノサイエンス研究部研究報告 2185-9094 58 22 26 20130000 simamoto/misc/10757565 Tsuyoshi Sotetsumoto Tian Song Takashi Shimamoto Low complexity algorithm for sub-pixel motion estimation of HEVC 2013 IEEE International Conference on Signal Processing, Communications and Computing, ICSPCC 2013 null null 20130000 10.1109/ICSPCC.2013.6664018 2-s2.0-84892503635 simamoto/misc/10757567 Tsuyoshi Sotetsumoto 蘇鉄本 強 Takuya Miki 三木 拓也 Tian Song 宋 天 Takashi Shimamoto 島本 隆 Computational Complexity Reduction Algorithm of Sub-Pixel Motion Estimation for HEVC The 27th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC2012) null null 20120715 simamoto/misc/10757568 Kentaro Takei Takafumi Bando 板東 孝文 Naoyuki Ishikura 石倉 直幸 Tian Song 宋 天 Takashi Shimamoto 島本 隆 Motion Vector Management Architecture for 4K Resolution H.264/AVC Decoder Proceedings of International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP'12) null null 20120304 simamoto/misc/10757569 Naoyuki Ishikura 石倉 直幸 Kentaro Takei 武井 健太郎 Tian Song 宋 天 Takashi Shimamoto 島本 隆 Fast Inter-layer Motion Estimation for Spatial Scalability of H.264/SVC International Conference on Innovative Computing, Information and Control (ICICIC2011) null null 20111222 simamoto/misc/10757572 Yuya Matsunohana 松端 裕也 Yuhiro Sakai 酒井 雄大 Tian Song 宋 天 Takashi Shimamoto 島本 隆 Fast Parallel Algorithm of H.264/AVC Deblocking Filter for GPU Implementation The 26th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC2011) null null 20110619 simamoto/misc/10757571 Yi Li 李 毅 Tian Song 宋 天 Takashi Shimamoto 島本 隆 Keyframe Selection Method Based on the Motion Features of H.264 The 26th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC2011) null null 20110619 simamoto/misc/10757578 Naoyuki Hirai 平井 直行 Yuhiro Sakai 酒井 雄大 Tian Song 宋 天 Takashi Shimamoto 島本 隆 Fast Spiral Motion Estimation Algorithm for H.264/AVC Proceedings of International Workshop on Nonlinear Circuits, Communication and Signal Processing (NCSP'11) null null 20110303 simamoto/misc/10757577 Masashi Koshino 古志野 真史 Yuya Matsunohana 松端 裕也 Tian Song 宋 天 Takashi Shimamoto 島本 隆 Fast Parallel Algorithm of Motion Estimation for GPU Implementation Proceedings of International Workshop on Nonlinear Circuits, Communication and Signal Processing (NCSP'11) null null 20110303 simamoto/misc/10757576 Takaaki Hamamoto 濱本 高彰 Takafumi Katayama 片山 貴文 Tian Song 宋 天 Takashi Shimamoto 島本 隆 Novel Variable Search Range Selection Algorithm for H.264/SVC Proceedings of International Workshop on Nonlinear Circuits, Communication and Signal Processing (NCSP'11) null null 20110303 simamoto/misc/10757575 Wenjun Zhao Tian Song 宋 天 Jinxiang Wang Takashi Shimamoto 島本 隆 Improved Inter-layer Intra Prediction for Scalable Video Coding Proceedings of International Workshop on Nonlinear Circuits, Communication and Signal Processing (NCSP'11) null null 20110303 simamoto/misc/10757574 Takafumi Katayama 片山 貴文 Takaaki Hamamoto 濱本 高彰 Tian Song 宋 天 Takashi Shimamoto 島本 隆 Motion Estimation Algorithm for Spatial Scalability in H.264/SVC Proceedings of International Workshop on Nonlinear Circuits, Communication and Signal Processing (NCSP'11) null null 20110303 simamoto/misc/38102286 Song Tian 宋 天 Koshino Masashi 古志野 真史 Matsunohana Yuya 松端 裕也 Shimamoto Takashi 島本 隆 Parallel Implementation Algorithm of Motion Estimation for GPU Applications GPUを用いた動画像高速編集手法に関する研究 The video coding standard H.264/AVC can achieve higher coding efficiency than previous standards. However, it comes at the expense of an increased encoding complexity, especially for motion estimation process which induces very time consuming task even for current central processing units (CPU). On the other hand, due to the rapid growth of the processing capability of graphics processing unit (GPU), using GPU as a coprocessor to assist the CPU in computing massive data becomes essential. In this work, we propose a fast parallel algorithm for motion estimation (ME) process in H.264/AVC on a computer unified device architecture (CUDA) platform. The proposed algorithm performs the parallel calculation of the residuals and SAD. Simulation results show that with the assistance of GPU the processing time is about 2 times faster than that of using CPU only. The University of Tokushima 徳島大学 Bulletin of Institute of Technology and Science the University of Tokushima 徳島大学大学院ソシオテクノサイエンス研究部研究報告 2185-9094 56 58 63 20110000 simamoto/misc/10757573 Takafumi Bando Naoyuki Hirai Tian Song Takashi Shimamoto New prediction modes for parallel processing of H.264/AVC Proceedings - 2011 International Conference on Multimedia and Signal Processing, CMSP 2011 1 344 347 20110000 10.1109/CMSP.2011.76 2-s2.0-80051911223 simamoto/misc/10757570 Tian Song Takashi Shimamoto Takafumi Bando Wenjun Zhao Novel INTRA modes with temporal-spatial prediction for H.264/AVC Digest of Technical Papers - IEEE International Conference on Consumer Electronics 0747-668X 62 65 20110000 10.1109/ICCE-Berlin.2011.6031845 2-s2.0-80054830487 simamoto/misc/10757582 Takafumi Katayama 片山 貴文 Takaaki Hamamoto 濱本 高彰 Tian Song 宋 天 Takashi Shimamoto 島本 隆 Low Complexity Inter-Layer Motion Estimation Algorithm for H.264/SVC Proceedings of World Automation Congress (WAC2010) null null 20100919 simamoto/misc/10757584 Tomohiro Akita 秋田 朋洋 Naoyuki Hirai 平井 直行 Tian Song 宋 天 Takashi Shimamoto 島本 隆 Efficient Deblocking Filter Architecture for High-Resolution Applications of H.264/AVC The Third International Symposium on Intelligent Informatics (ISII2010) null null 20100905 simamoto/misc/10757583 Kentaro Takei 武井 健太郎 Takafumi Katayama 片山 貴文 Tian Song 宋 天 Takashi Shimamoto 島本 隆 Complexity Reduction Algorithm for Enhancement Layer of H.264/SVC The Third International Symposium on Intelligent Informatics (ISII2010) null null 20100905 simamoto/misc/10757585 Yizhong Liu Yi Li Tian Song 宋 天 Takashi Shimamoto 島本 隆 Four-bins Paralleled Architecture for CABAC in H.264/AVC Proceedings of International Workshop on Nonlinear Circuits and Signal Processing (NCSP'10) null null 20100303 simamoto/misc/10757581 Kentaro Takei Naoyuki Hirai Takafumi Katayama Tian Song Takashi Shimamoto Real-Time Architecture for Inter-layer Prediction of H.264/SVC ADVANCES IN MULTIMEDIA INFORMATION PROCESSING-PCM 2010, PT II 0302-9743 6298 235 244 20100000 10.1007/978-3-642-15696-0_22 simamoto/misc/10757580 Takafumi Katayama Takaaki Hamamoto Tian Song Takashi Shimamoto MOTION BASED LOW COMPLEXITY ALGORITHM FOR SPATIAL SCALABILITY OF H.264/SVC 2010 IEEE INTERNATIONAL CONFERENCE ON IMAGE PROCESSING 1522-4880 4213 4216 20100000 10.1109/ICIP.2010.5651370 simamoto/misc/10757579 Kyohei Oba Takahiro Bandou Tian Song Takashi Shimamoto Coding efficient improvement by adaptive search center definition 28th Picture Coding Symposium, PCS 2010 58 61 20100000 10.1109/PCS.2010.5702571 2-s2.0-79951780421 simamoto/misc/10757587 Takaaki Hamamoto Takafumi Katayama Tian Song 宋 天 Takashi Shimamoto 島本 隆 Mode Selection Method for Hierarchical B-picture of H.264/SVC The Second International Symposium on Intelligent Informatics (ISII2009) null null 20090913 simamoto/misc/10757589 Naoyuki Hirai Takahiro Kato Tian Song 宋 天 Takashi Shimamoto 島本 隆 An Efficient Architecture for Spiral-Type Motion Estimation for H.264/AVC The 24th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC2009) null null 20090705 simamoto/misc/10757588 Takafumi Katayama Yoshitaka Morigami Tian Song 宋 天 Takashi Shimamoto 島本 隆 Improvement of Motion Estimation with Modified Search Center and Search Range for H.264/SVC The 24th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC2009) null null 20090705 simamoto/misc/10757591 Yoshitaka Morigami Shinpei Matsuoka Tian Song 宋 天 Takashi Shimamoto 島本 隆 Efficient Mode Selection Algorithm for Inter-Layer Residual Prediction of H.264/SVC The 15th Workshop on Synthesis And System Integration of Mixed Information technologies (SASIMI2009) null null 20090309 simamoto/misc/37622105 Kozu Hiroki 高津 大樹 Kuniyasu Hiroki 國安 大樹 Song Tian 宋 天 Shimamoto Takashi 島本 隆 A-6-1 Efficient Mode Decision Algorithm for H.264/AVC A-6-1 H.264/AVCにおける高効率モード選択手法(A-6.情報理論,一般セッション) The Institute of Electronics, Information and Communication Engineers 一般社団法人電子情報通信学会 Proceedings of the IEICE General Conference 電子情報通信学会総合大会講演論文集 2009 165 165 20090304 simamoto/misc/37469683 KUNIYASU Hiroki 國安 大樹 KISHIDA Tomoyuki 岸田 智幸 SONG Tian 宋 天 SHIMAMOTO Takashi 島本 隆 Transform and Quantization Architecture with All-Zero Detection and Bit Estimation for H.264/AVC H.264/AVCにおける All-Zero ブロック検出および生成ビット数を予測可能なDCT・量子化アーキテクチャ H.264/AVC introduced a certain numbers of novel prediction modes compared to the previous standards. Rate-Distortion Optimization (RDO) which is a method used for selecting optimal prediction mode from the candidate prediction modes, induces drastic computation complexity increasing. In particular, the transform and quantization of the H.264/AVC, namely DQ Engine in this work, with the calculation of generated bits introduced, needs many processing cycles due to frequently using for the RDO process. Therefore, there is high requirement for fast architecture of DQ engine and CAVLC in the case of real-time encoding for high definition applications. In this work, an efficient architecture for fast DQ module is proposed. Proposed architecture introduced an early detection architecture for all-zero block which can cut down the redundant process. A bit estimation architecture is also introduced into the DQ Engine to fulfill fast estimation of the generated bits. Proposed architecture are described with Verilog-HDL and implemented on FPGA (Xilinx Vertex-5) device. Proposed architecture can be implemented with only 34,352 gates. The simulation results show that the proposed method can achieve fast processing of DQ with almost no image quality loss. From the results, our architecture is possible to achieve real-time encoding for full HD resolution when operating at about 100MHz clock. 動画像符号化標準H.264/AVCに使用される符号化手法は,従来と比べ,多数の新規予測モードが導入された.複数の予測モードの中から最適な予測モードを選択する手法としてRDO(Rate Distortion Optimization)が用いられているが,この処理は膨大な演算量が必要になる.その中でもDCT・量子化(DQ)処理,および生成ビット数の算出処理は,多くのサイクルが必要となる.RDO処理時にDQの処理が頻繁に行われるため,全体処理サイクル数が膨大になる．本稿では,高解像度アプリケーションのリアルタイム符号化を実現するために,高速DCTアーキテクチャ,および生成ビット数を早期に予測するアーキテクチャを提案するとともに,冗長な演算を削減するために,All-Zeroブロック検出アーキテクチャを提案する.提案手法を評価し,シミュレーション結果により,画質の劣化は無いに等しく,ビットレートの増加も抑えたことが確認できた.提案アーキテクチャをFPGA(Xilinx Virtex-5)で実装した結果,ゲート数は約34Kであり,100MHz動作時に,RDO処理を含むフルHD1080p(1920x1080 30fps)のリアルタイム符号化が実現可能となった. The Institute of Electronics, Information and Communication Engineers 一般社団法人電子情報通信学会 IEICE technical report 電子情報通信学会技術研究報告. VLD, VLSI設計技術 0913-5685 108 478 165 170 20090304 simamoto/misc/37469681 HAYASHI Yoshinori 林 良典 AKITA Tomohiro 秋田 朋洋 SONG Tian 宋 天 SHIMAMOTO Takashi 島本 隆 Low Power Deblocking Filter Implementation Method for H.264/AVC H.264/AVCにおけるデブロッキングフィルタの低消費電力化実装手法 This paper presents a low power architecture for deblocking filter of the H.264/AVC. Deblocking filtering accounts for from one third to half of the computation complexity of the H.264/AVC decoder. Therefore, the low power architecture for deblocking filter becomes important. In this work, focusing on the redundant processing when the filtering strength is obtained, an early judgment of the filtering strength and an efficient architecture are proposed. Proposed architecture is implemented with FPGA (Xilinx Vertex5). Implementation results show that the number of the gate counts are 15.5K and it can work at over 100MHz. Simulation results show that there are maximum 93.4% reduction in the calculations of filtering strength. Therefore low power implementation can be achieved with the proposed architecture. 動画像符号化方式H.264/AVCはワンセグ放送,携帯電話など様々な携帯端末に使用されているが,低消費電力化が重要な課題となっている.特にH.264/AVCデコーダの全演算量の約30∼50%を占めるデブロッキングフィルタ処理の低消費電力化が重要となる.本研究では,フィルタリング強度を求める際に,冗長な計算が行われていることに注目し,フィルタリング強度の早期判定手法と,そのアーキテクチャを提案する.また,効率的にフィルタリング処理を行うアーキテクチャを提案する.提案アーキテクチャをFPGA(Xilinx Virtex5)で実装した結果,ゲート数は15.5K,また最大動作周波数100MHzで動作可能である.シミュレーション結果により,提案手法を用いる場合,フィルタリング強度の計算量において最大93.4%の削減を実現し,デブロッキングフィルタ処理の低消費電力化が実現可能となった. The Institute of Electronics, Information and Communication Engineers 一般社団法人電子情報通信学会 IEICE technical report 電子情報通信学会技術研究報告. VLD, VLSI設計技術 0913-5685 108 478 159 164 20090304 simamoto/misc/10757592 Tomoyuki Kishida Hiroki Kuniyasu Tian Song 宋 天 Takashi Shimamoto 島本 隆 Motion Based Frame Memory Access Reduction Method for H.264/AVC Proceedings of International Workshop on Nonlinear Circuits and Signal Processing (NCSP'09) null null 20090301 simamoto/misc/10757590 Hiroki Kozu Hiroki Kuniyasu Tian Song Takashi Shimamoto Spatial-Temporal Correlation Based Mode Decision Algorithm for H.264/AVC ISCE: 2009 IEEE 13TH INTERNATIONAL SYMPOSIUM ON CONSUMER ELECTRONICS, VOLS 1 AND 2 2158-3994 718 + 20090000 10.1109/ISCE.2009.5156988 simamoto/misc/10757586 Yoshitaka Morigami Tian Song Takafumi Katayama Takashi Shimamoto LOW COMPLEXITY ALGORITHM FOR INTER-LAYER RESIDUAL PREDICTION OF H.264/SVC 2009 16TH IEEE INTERNATIONAL CONFERENCE ON IMAGE PROCESSING, VOLS 1-6 3761 3764 20090000 10.1109/ICIP.2009.5414378 simamoto/misc/10757594 Takahiro Kato Tian Song 宋 天 Yizhong Liu Takashi Shimamoto 島本 隆 Motion Vector Predicted Variable Search Range Motion Estimation Algorithm for H.264/AVC International Workshop on Vision, Communications and Circuits (IWVCC2008) null null 20081102 simamoto/misc/10757593 Eiji Koeta Tian Song 宋 天 Takeshi Kondo Takashi Shimamoto 島本 隆 Coding Mode Decision Method for MPEG-2/H.264 Transcoder International Workshop on Vision, Communications and Circuits (IWVCC2008) null null 20081102 simamoto/misc/37618588 Morigami Yoshitaka 森上 義崇 Matsuoka Shinpei 松岡 真平 Song Tian 宋 天 Shimamoto Takashi 島本 隆 A-4-8 Intra Mode Selection Method for H.264/SVC A-4-8 H.264/SVCにおけるイントラモード選択手法(A-4.信号処理,一般セッション) The Institute of Electronics, Information and Communication Engineers 一般社団法人電子情報通信学会 Proceedings of the Society Conference of IEICE 電子情報通信学会ソサイエティ大会講演論文集 2008 66 66 20080902 simamoto/misc/10757595 Shinpei Matsuoka Yoshitaka Morigami Tian Song 宋 天 Takashi Shimamoto 島本 隆 Coding Efficiency Improvement with Adaptive GOP Size Selection for H.264/SVC International Conference on Innovative Computing, Information and Control (ICICIC2008) null null 20080619 10.1109/ICICIC.2008.193 simamoto/misc/10757597 Haruhiko Okamoto Yoshinori Hayashi Tian Song 宋 天 Takashi Shimamoto 島本 隆 Switched CABAC/CAVLC Architecture for Real-Time High Profile Applications of H.264/AVC Proceedings of International Workshop on Nonlinear Circuits and Signal Processing (NCSP'08) null null 20080306 simamoto/misc/10757596 Yoshinori Hayashi Tian Song Eiji Koeta Takashi Shimamoto Fast Deblocking Filter Implementation Method and it's architecture for H.264/AVC ECTI-CON 2008: PROCEEDINGS OF THE 2008 5TH INTERNATIONAL CONFERENCE ON ELECTRICAL ENGINEERING/ELECTRONICS, COMPUTER, TELECOMMUNICATIONS AND INFORMATION TECHNOLOGY, VOLS 1 AND 2 465 + 20080000 10.1109/ECTICON.2008.4600471 simamoto/misc/39217358 HAYASHI Yoshinori 林 良典 KOETA Eiji 肥田 英司 SONG Tian 宋 天 SHIMAMOTO Takashi 島本 隆 A Low Complexity Deblocking Filter Implementation Method for H.264/AVC Decoder H.264/AVCデコーダにおける低演算量デブロッキングフィルタ実装手法 This paper presents a fast parallel architecture for deblocking filter of the H.264/AVC decoder. Deblocking filtering accounts for from one third to half of the computation complexity of the decoder. Therefore, to decrease the computation intensity several traditional works have been proposed which dedicate to fulfill memory efficient architecture and highly paralleled architectures. However, all of the traditional works considered the least filtering cycles numeber for one macroblock is 192. In this work, we make use of the correlation of the adjacent pixels to decrease the redundant processing cycles. Proposed efficient architecture could fulfill the filtering process for one macroblock in about 170 cycles. This work also provide parrallel memory access solution for the proposed architecture. 動画像圧縮符号化標準H.264/AVCがワンセグ放送,携帯端末など様々な分野で普及されているが,デコーダの演算量削減が重要な課題となっている.特にデコーダの全演算量の約30%-50%を占めるデブロッキングフィルタ処理の演算量削減が重要となる.従来手法では,メモリアクセスの効率化,処理の並列化などの手法を用い,1マクロブロックの処理に極限と認識されている192サイクルで処理できるようになっている.本研究では,隣接画素の相関性が高い特性を利用し,フィルタリング処理を行う際に用いる画素値に注目し,隣接画素値が同じである場合の演算量削減手法とそのアーキテクチャを提案する.シミュレーション結果により,提案手法を用いる場合,1マクロブロックの処理は約170サイクルで実現可能となった. The Institute of Electronics, Information and Communication Engineers 一般社団法人電子情報通信学会 IEICE technical report 電子情報通信学会技術研究報告. VLD, VLSI設計技術 0913-5685 107 102 43 48 20070614 simamoto/misc/39184026 Matsuoka Shinpei 松岡 真平 Nose Koji 野瀬 浩司 Shimamoto Takashi 島本 隆 Kitayama Seishi 來山 征士 A-4-17 A Study on the Step-gain of NLMS Echo Canceller for Colored Signal A-4-17 有色性信号におけるNLMSエコーキャンセラのステップゲインの検討(A-4.信号処理,一般講演) The Institute of Electronics, Information and Communication Engineers 一般社団法人電子情報通信学会 Proceedings of the IEICE General Conference 電子情報通信学会総合大会講演論文集 2007 128 128 20070307 simamoto/misc/39184014 Higashiyama Masaaki 東山 正明 Yano Satoshi 矢野 智 Shimamoto Takashi 島本 隆 Kitayama Seishi 來山 征士 A-4-21 Correlation between Residual Echo and Pseud Echo in NLMS E/C A-4-21 NLMS E/Cにおける残留エコーと擬似エコーの相関性(A-4.信号処理,一般講演) The Institute of Electronics, Information and Communication Engineers 一般社団法人電子情報通信学会 Proceedings of the IEICE General Conference 電子情報通信学会総合大会講演論文集 2007 132 132 20070307 simamoto/misc/39183896 Sato Seiichi 佐藤 成一 Song Tian 宋 天 Shimamoto Takashi 島本 隆 D-11-23 Motion Vector Besed Rate Control Algorithm for H.264/AVC D-11-23 H.264/AVCにおける動きベクトルを用いたビットレート制御(D-11.画像工学A(画像基礎・符号化),一般講演) The Institute of Electronics, Information and Communication Engineers 一般社団法人電子情報通信学会 Proceedings of the IEICE General Conference 電子情報通信学会総合大会講演論文集 2007 2 23 23 20070307 simamoto/misc/39183890 Okamoto Haruhiko 岡本 晴彦 Song Tian 宋 天 Shimamoto Takashi 島本 隆 D-11-2 Switched Entropy Coding Method for Real-Time High Defination Applicaitons of H.264/AVC D-11-2 高解像度用H.264/AVCにおけるエントロピー符号化手法(D-11.画像工学A(画像基礎・符号化),一般講演) The Institute of Electronics, Information and Communication Engineers 一般社団法人電子情報通信学会 Proceedings of the IEICE General Conference 電子情報通信学会総合大会講演論文集 2007 2 2 2 20070307 simamoto/misc/10757601 Kosuke Saito Tian Song 宋 天 Takashi Shimamoto 島本 隆 Efficient Variable Search Range Motion Estimation Architecture for Real-time RDO of H.264/AVC Proceedings of RISP International Workshop on Nonlinear Circuits and Signal Processing (NCSP'07) null null 20070304 simamoto/misc/10757602 Atsushi Yamada Tian Song 宋 天 Takashi Shimamoto 島本 隆 Multi-State Estimated Architecture of CABAC for H.264/AVC Proceedings of RISP International Workshop on Nonlinear Circuits and Signal Processing (NCSP'07) null null 20070303 simamoto/misc/10757600 Tian Song Kazuhiro Ogata Kosuke Saito Takashi Shimatnoto Adaptive search range motion estimation algorithm for H.264/AVC 2007 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS, VOLS 1-11 0271-4302 3956 + 20070000 simamoto/misc/10757599 Tian Song Takashi Shimamoto Efficient motion compensation architecture with rate-distortion optimization for H.264/AVC SIGMAP 2007: PROCEEDINGS OF THE SECOND INTERNATIONAL CONFERENCE ON SIGNAL PROCESSING AND MULTIMEDIA APPLICATIONS 159 + 20070000 simamoto/misc/10757598 Hiroki Kuniyasu Tomoyuki Kishida Tian Song Takashi Shimamoto Fast transform and quantization architecture with all-zero detection and bit estimation for H.264/AVC PROCEEDINGS OF 2007 INTERNATIONAL WORKSHOP ON SIGNAL DESIGN AND ITS APPLICATIONS IN COMMUNICATIONS 334 + 20070000 10.1109/IWSDA.2007.4408391 simamoto/misc/39109981 Matsuoka Shinpei 松岡 真平 Nose Koji 野瀬 浩司 Yano Satoshi 矢野 智 Shimamoto Takashi 島本 隆 Kitayama Seishi 來山 征士 A-4-30 An echo canceller with variable regularization A-4-30 可変調整項を用いたエコーキャンセラ(A-4.信号処理,一般講演) The Institute of Electronics, Information and Communication Engineers 一般社団法人電子情報通信学会 Proceedings of the Society Conference of IEICE 電子情報通信学会ソサイエティ大会講演論文集 2006 97 97 20060907 simamoto/misc/39108715 Ogata Kazuhiro 尾形 和洋 Saito Kosuke 齋藤 公輔 Song Tian 宋 天 Shimamoto Takashi 島本 隆 A-6-8 Variable Search Range Motion Estimation Algorithm for H.264/AVC A-6-8 H.264/AVCにおける動き探索範囲に関する研究(A-6.情報理論,一般講演) The Institute of Electronics, Information and Communication Engineers 一般社団法人電子情報通信学会 Proceedings of the Society Conference of IEICE 電子情報通信学会ソサイエティ大会講演論文集 2006 127 127 20060907 simamoto/misc/26867215 YANO Satoshi 矢野 智 YAMAGUCHI Tatsuhiko 山口 辰彦 SHIMAMOTO Takashi 島本 隆 KITAYAMA Seishi 來山 征士 KUROIWA Shingo 黒岩 眞吾 Step Gain Control Method in Adaptation Echocanceller 適応エコーキャンセラにおけるステップゲイン制御法 Adaptation echo cancellers with long transmission delay in hands-free telephones and TV meeting systems are accomplished mainly by NLMS algorithm. It is automatically synthesizing an impulse responce model of the echo path, convolving the incoming signal with the model, and subtracting the resulting replica of echo from the circuit echo. But its stability becomes worse in double-talking periods. To resolve this problem several variable step gain methods have been proposed. This paper proposes a echo canceller with variable step gain using calculation method of observation noise by cross-correlation of observation signal and residual echo signal, and shows that the echo canceller with this method provides higher echo cancellation performance. ハンズフリー電話,テレビ会議などの伝送遅延を伴う音声通信システムで使用される適応エコーキャンセラでは,主にNLMSアルゴリズムが用いられる.NLMSはエコー路のインパルス応答を推定し,推定したインパルス応答と入力信号を畳み込み演算するすることにより擬似エコーを生成する.これをエコーから差し引くことでエコーを消去することができる.しかし,ダブルトーク時ではインパルス応答の推定動作が不安定となり,エコー打消し特性が劣化する.この問題を解決するため,いくつかの可変ステップゲイン法が提案されている.本論文では,観測信号と残留エコー信号の相関を用いてステップゲインを制御するアルゴリズムを提案し,シミュレーション実験を通じ提案するアルゴリズムはエコー打消し特性向上を可能とすることを明らかにする. 一般社団法人電子情報通信学会 IEICE technical report 電子情報通信学会技術研究報告. SIP, 信号処理 0913-5685 106 170 5 11 20060714 simamoto/misc/10757603 Tian Song 宋 天 Takashi Shimamoto 島本 隆 Frame Memory Compression Method for H.264/AVC The 2006 International Technical Conference on Circuits/Systems, Computers and Communications null null 20060710 simamoto/misc/39109586 Yamada Atsushi 山田 篤 Satou Seiichi 佐藤 成一 Song Tian 宋 天 Shimamoto Takashi 島本 隆 D-11-39 An efficient architecture of CABAC for H.264/AVC D-11-39 H.264/AVCにおけるCABAC高速処理アーキテクチャ(D-11.画像工学A(画像基礎・符号化),一般講演) The Institute of Electronics, Information and Communication Engineers 一般社団法人電子情報通信学会 Proceedings of the IEICE General Conference 電子情報通信学会総合大会講演論文集 2006 2 39 39 20060308 simamoto/misc/10757604 Yasunori Kawaoka Takashi Shimamoto 島本 隆 Tian Song 宋 天 Evolutional Algorithms of A Steiner Tree Problem in 3-D VLSI Proceedings of RISP International Workshop on Nonlinear Circuits and Signal Processing (NCSP'06) null null 20060303 simamoto/misc/39109574 Shishido Atsushi 宍戸厚 Okada Hideki 岡田 英輝 Song Tian 宋 天 Shimamoto Takashi 島本 隆 D-11-38 Fast 4-step Intra-Prediction Mode Selection Method for H.264/AVC H.264/AVCにおける4-step Intra 予測モード決定手法 The Institute of Electronics, Information and Communication Engineers 一般社団法人電子情報通信学会 Proceedings of the IEICE General Conference 信学総大, Mar. 2006 38 38 20060000 simamoto/misc/10757605 Saito Kosuke Tian Song 宋 天 Takashi Shimamoto 島本 隆 Complexity Reduced Variable Block Size Motion Estimation Algorithm for H.264 The 2005 International Technical Conference on Circuits/Systems, Computers and Communications null null 20050704 simamoto/misc/38680015 Mitani Atsushi 三谷 篤史 Yano Satoshi 矢野 智 Shimamoto Takashi 島本 隆 Kitayama Seishi 來山 征士 A-4-20 An Variable Step-gain Echocanseller using Estimation error of Impulse Response A-4-20 推定誤差を考慮した可変ステップゲイン型エコーキャンセラ(A-4. 信号処理, 基礎・境界) The Institute of Electronics, Information and Communication Engineers 一般社団法人電子情報通信学会 Proceedings of the IEICE General Conference 電子情報通信学会総合大会講演論文集 2005 101 101 20050307 simamoto/misc/10757608 Hanako Hamada Satoshi Yano Takashi Shimamoto 島本 隆 Seishi Kitayama 來山 征士 Two Echo Cancellers in Tandem International Workshop on Nonlinear Circuits and Signal Processing (NCSP'04) null null 20040305 simamoto/misc/10757607 Tomoko Okada Satoshi Yano Takashi Shimamoto 島本 隆 Seishi Kitayama 來山 征士 Echo Canceller with Variable Step-Gain Using Variance International Workshop on Nonlinear Circuits and Signal Processing (NCSP'04) null null 20040305 simamoto/misc/10757606 Junko Hamao Yoko Uwate 上手 洋子 Takashi Shimamoto 島本 隆 Yoshifumi Nishio 西尾 芳文 Solving Ability of Hopfield NN with Chaos Noise for Maximum Independent Set Problems Proceedings of RISP International Workshop on Nonlinear Circuits and Signal Processing (NCSP'04) null null 20040305 simamoto/misc/38217199 Yano Satoshi 矢野 智 Shimamoto Takashi 島本 隆 Kitayama Seishi 來山 征士 AN ECHOCANCELLER WITH IMPROVED CONVERGENCE PROPERTY A-4-30 収束特性を改善できるエコーキャンセラ The Institute of Electronics, Information and Communication Engineers 一般社団法人電子情報通信学会 Proceedings of the Society Conference of IEICE 電子情報通信学会ソサイエティ大会講演論文集 2003 91 91 20030910 simamoto/misc/10757609 Masaki Hashizume 橋爪 正樹 Teruyoshi Matsushima Takashi Shimamoto 島本 隆 Hiroyuki Yotsuyanagi 四柳 浩之 Takeomi Tamesada 為貞 建臣 Akio Sakamoto Simplification of Incompletely Specified Machine Based on Genetic Algorithm Implementing Dormant Mechanism 3rd Workshop on RTL and High Level Testing (WRTLT02) null null 20021121 simamoto/misc/10757611 Hanako Hamada Satoshi Yano Takashi Shimamoto 島本 隆 Seishi Kitayama 來山 征士 A Calculation Method of Quantization Level in the Design of Digital Echo Cancellers International Symposium on Nonlinear Theory and its Applications (NOLTA 2002) null null 20021007 simamoto/misc/10757610 Tomoko Okada Satoshi Yano Takashi Shimamoto 島本 隆 Seishi Kitayama 來山 征士 An Adaptive Echo Canceller with High Convergence Rate Using Nonlinear Distortion International Symposium on Nonlinear Theory and its Applications (NOLTA 2002) null null 20021007 simamoto/misc/38776638 Yano S. 矢野 智 Shimamoto T. 島本 隆 Kitayama S. 來山 征士 An Variable Step-gain Echocanseller with the Storing Register A-4-15 状態保存レジスタを有する可変ステップゲインエコーキャンセラ The Institute of Electronics, Information and Communication Engineers 一般社団法人電子情報通信学会 Proceedings of the Society Conference of IEICE 電子情報通信学会ソサイエティ大会講演論文集 2002 77 77 20020820 simamoto/misc/38776628 Kimura N. 木村 直樹 Shimamoto T. 島本 隆 Kitayama S. 來山 征士 The performance improvement of the NLMS echocanseller using Modulated Noise Reference A-4-16 音声相関雑音によるNLMSエコーキャンセラの性能改善 The Institute of Electronics, Information and Communication Engineers 一般社団法人電子情報通信学会 Proceedings of the Society Conference of IEICE 電子情報通信学会ソサイエティ大会講演論文集 2002 78 78 20020820 simamoto/misc/38776618 Minamiguchi T. 南口 友秀 Yano S. 矢野 智 Shimamoto T. 島本 隆 Kitayama S. 來山 征士 An Improvement of Performance in the Variable Step-gain Echocanseller A-4-14 可変ステップゲイン形エコーキャンセラにおける性能改善 The Institute of Electronics, Information and Communication Engineers 一般社団法人電子情報通信学会 Proceedings of the Society Conference of IEICE 電子情報通信学会ソサイエティ大会講演論文集 2002 76 76 20020820 simamoto/misc/37730696 Yano Satoshi 矢野 智 Kitayama Seishi 來山 征士 Shimamoto Takashi 島本 隆 On performance of the echocanceller with variable stepgain considering IR estimation A-4-60 IR推定を考慮した可変ステップゲインエコーキャンセラの性能 The Institute of Electronics, Information and Communication Engineers 一般社団法人電子情報通信学会 Proceedings of the IEICE General Conference 電子情報通信学会総合大会講演論文集 2002 170 170 20020307 simamoto/misc/38035804 YANO Satoshi 矢野 智 SHIMAMOTO Takashi 島本 隆 KITAYAMA Seishi 來山 征士 Echo Cancellation Algorithm with robustness against Double-Talking 重畳通話にロバストである適応エコーキャンセラ The problem of echo cancellation arises wherever long distance telephone circuits take place, such as satellite communications and long distance communication circuits. In these communications systems, the users are annoyed by listening to their own speech delayed by the round-trip time of the system. In order to avoid these problems, the echo return loss through the echo path must be high. This paper describes a new echo cancellation algorithm with a variable step gain, which has the robustness against the double-talking period. ハンズフリー電話,テレビ会議などの遅延をもつ伝送システムで使用される適応エコーキャンセラでは,送話信号がシステム同定における外乱となり,インパルス応答の推定動作が不安定となる.このため,受話信号と,外乱となる送話信号の電力比を推定し,ステップゲインを可変とするNLMSアルゴリズムを提案する.この論文では,提案するアルゴリズムと入力信号と出力誤差の平均相関係数を用いる手法と提案した手法の性能を比較検討する. The Institute of Electronics, Information and Communication Engineers 一般社団法人電子情報通信学会 IEICE technical report. Communication systems 電子情報通信学会技術研究報告. CS, 通信方式 0913-5685 101 670 65 70 20020226 simamoto/misc/10757612 Satoshi Yano 矢野 智 Seishi Kitayama 來山 征士 Takashi Shimamoto 島本 隆 Hidekiyo Itakura 板倉 秀清 Echo Cancellation Algorithm with Stability during Double-Talking The 2001 International Technical Conference on Circuits/Systems, Computers and Communications null null 20010710 simamoto/misc/38263764 Yano Satoshi 矢野 智 Kitayama Seishi 來山 征士 Shimamoto Takashi 島本 隆 Adaptive echocanceller with stability characteristics for the double-talking A-4-34 重畳通話時を考慮した適応型エコーキャンセラ The Institute of Electronics, Information and Communication Engineers 一般社団法人電子情報通信学会 Proceedings of the IEICE General Conference 電子情報通信学会総合大会講演論文集 2001 134 134 20010307 simamoto/misc/38212081 Oga Shogo 大賀 章吾 Yamaguchi Tatsuhiko 山口 辰彦 Shimamoto Takashi 島本 隆 Kitayama Seishi 來山 征士 An adaptive echocanceller utilizing wavelet-transform A-4-16 ウェーブレット変換を利用する適応エコーキャンセラ The Institute of Electronics, Information and Communication Engineers 一般社団法人電子情報通信学会 Proceedings of the Society Conference of IEICE 電子情報通信学会ソサイエティ大会講演論文集 2000 107 107 20000907 simamoto/misc/38265992 Morito Chiaki 森藤 千晶 Shimamoto Takashi 島本 隆 Kitayama Seishi 來山 征士 Adaptive echocanceller with stability characteristics during the period of double-talking 重畳通話を考慮した適応形エコーキャンセラ The Institute of Electronics, Information and Communication Engineers 一般社団法人電子情報通信学会 Proceedings of the IEICE General Conference 電子情報通信学会総合大会講演論文集 2000 138 138 20000307 simamoto/misc/38265961 Yamaguchi Tatsuhiko 山口 辰彦 Shimamoto Takashi 島本 隆 Kitayama Seishi 來山 征士 BOP echocanceller with stability characteristics during the period of double-talking 重畳通話時に安定動作するBOP形エコーキャンセラ The Institute of Electronics, Information and Communication Engineers 一般社団法人電子情報通信学会 Proceedings of the IEICE General Conference 電子情報通信学会総合大会講演論文集 2000 136 136 20000307 simamoto/misc/10757613 Teruyoshi Matsushima 松島 晃良 Masaki Hashizume 橋爪 正樹 Takeomi Tamesada 為貞 建臣 Takashi Shimamoto 島本 隆 Akio Sakamoto 坂本 明雄 State Reduction of Incompletely Specified Machines based on Genetic Approach The 1999 International Technical Conference on Circuits/Systems, Computers and Communications null null 19990713 simamoto/misc/19949173 A Method for Analysis of Trasmission Line Neworks Using Frequency Response Approximation Trans.IEICE J82-A 1 47 55 19990000 simamoto/misc/37917983 TANJI Yuichi 丹治 裕一 SHIMAMOTO Takashi 島本 隆 Analysis of Transmission Line Networks Using Frequency Response Approximation 周波数応答の近似と伝送線路解析への応用 The frequency-domain method for the analysis of transmission lines networks using discrete Fourier transform is not computationally effective, when the analysis time becomes long.It is due to solving the circuit equation at each frequency component.In this paper, the approximation of impulse response in the frequency-domain is introduced instead of solving the circuit equation to the all frequency components, where cubic spline interpolation and a method via discrete Fourier transform are presented.In numerical examples, the efficiency of the proposed method is verified. 伝送線路回路網の離散フーリエ変換に基づく方法では，解析時間が長くなると演算効率が悪くなるという欠点をもつ．これは，各周波数での応答を得るために回路方程式をそのたびごとに求解しなければならないことが原因である．本論文では，回路方程式の求解を最小限にとどめ，代わりに周波数領域におけるインパルス応答を近似する方法を提案する．近似法としては，3次スプライン関数による方法と離散フーリエ変換・逆変換による方法を用いており，数値計算例を通して，比較的小規模な問題に対しては高速シミュレーション手法として知られているモーメント・マッチング法と比較して演算効率が優れていることを示す． The Institute of Electronics, Information and Communication Engineers 一般社団法人電子情報通信学会 IEICE technical report. Nonlinear problems 電子情報通信学会技術研究報告. NLP, 非線形問題 98 225 51 57 19980730 simamoto/misc/19949174 An Improvement of Genetic Approach for Maximum Independent Set Problems Trans.IEICE J81-A 1 160 162 19980000 simamoto/misc/37919135 SAKAGUCHI Youji 坂口 洋二 SHIMAMOTO Takashi 島本 隆 SAKAMOTO Akio 坂本 明雄 A Gridless Router for Arbitrary Via Size ビアサイズを考慮可能なグリッドレス配線手法 As VLSI layout becomes highly integrated and the number of layers increased, routing methods have to satisfy more various constraints caused by design rules and manufacturing technology. One of these constraints about via size is that a via needs larger area than a square with a side of minimum wire width. It is desirable to deal with flexibility and enlargement in the scale of VLSI that router should not assume grid structure. In this paper, we propose a gridless router with data structure called corner stitching. Furthermore, our router permits modifications to one which keeps up with the via size constraint by considering via forbidden regions. VLSIのレイアウト設計において, システムの高集積化, 多層化が進むにつれて多種多様な設計規則および製造技術上の制約を考慮しなくてはならなくなってきた．その制約のひとつに"層と層を接続するビアは, 最小配線幅を一辺とする正方形よりも大きな領域を必要とする"というものがある．また, VLSIの柔軟性および大規模化に対処するためにはグリッドを想定しない配線手法が望ましい．そこで本文では, コーナースティッチングと呼ばれるデータ構造によって図形を効率よく記憶するグリッドレス配線手法を提案する．さらに, ビア禁止領域を考慮したデータ構造を追加して, 前述のビアサイズについての制約にも対応できるように改良した． The Institute of Electronics, Information and Communication Engineers 一般社団法人電子情報通信学会 Technical report of IEICE. VLD 電子情報通信学会技術研究報告. VLD, VLSI設計技術 97 344 147 153 19971029 simamoto/misc/37919098 SUGIMOTO Chiaki 杉本 千晶 SHIMAMOTO Takashi 島本 隆 SAKAMOTO Akio 坂本 明雄 SUZUKI Hiroyuki 鈴木 博之 ANZAI Hiroomi 安斎 裕臣 A Hierarchical Floorplanning Method using Genetic Algorithm 遺伝的アルゴリズムを用いた階層的フロアプラン手法 In the stage of floorplanning of LSI design, it is generally hard to estimate the final area of chip strictly. We propose an evaluation method for a given relative positions of the modules. It estimates the final chip area as accurate as possible by considering the width of routing channels from the interconnection information among the modules. We assume a hierarchical floorplan model; a chip consists of some regions which consist of some soft and/or hard blocks, and finally soft blocks consist of some standard cells. To obtain a floorpllan with minimal chip area we use genetic algorithms. LSIのレイアウト設計におけるフロアプランの段階で, 最終チップ面積を厳密に見積もることは一般に困難である．本文では, モジュールの相対的配置が与えられたとき, モジュール間の結線情報から配線用チャネルの幅を見積もり, チップの寸法を高精度に評価するひとつの方法を提案する．なお, チップはいくつかのリージョンからなり, リージョンはソフトおよびハードブロックからなり, ソフトブロックはいくつかのスタンダードセルからなるという階層的フロアプランモデルを仮定している．遺伝的アルゴリズムを用いて, 小さなチップ面積を実現するフロアプランを得る手法を構築し, その実験結果を示した． The Institute of Electronics, Information and Communication Engineers 一般社団法人電子情報通信学会 Technical report of IEICE. VLD 電子情報通信学会技術研究報告. VLD, VLSI設計技術 97 344 133 140 19971029 simamoto/misc/10757614 Masaki Hashizume 橋爪 正樹 Takeomi Tamesada 為貞 建臣 Takashi Shimamoto 島本 隆 Akio Sakamoto 坂本 明雄 Genetic Approaches to State Reduction of Incompletely Specified Machines The 1997 International Technical Conference on Circuits/Systems, Computers and Communications null null 19970714 simamoto/misc/10757615 XZ Liu A Sakamoto T Shimamoto A genetic algorithm for maximum independent set problems INFORMATION INTELLIGENCE AND SYSTEMS, VOLS 1-4 1916 1921 19960000 simamoto/misc/19949175 A Module Placement Using Genetic Algorithms IEICE Trans. J77-A 8 1189 1191 19940000 simamoto/misc/19949176 An Attempt to Solve Channel Routing using Genetic Algorithm IEICE Trans. J76-A 9 1376 1379 19930000 simamoto/misc/10757616 T SHIMAMOTO H HANE SHIRAKAWA, I S TSUKIYAMA S SHINODA N YUI N NISHIGUCHI A DISTRIBUTED ROUTING SYSTEM FOR MULTILAYER SOG EURO-DAC 92 : EUROPEAN DESIGN AUTOMATION CONFERENCE 298 303 19920000 simamoto/misc/19949177 A Hierarchical Approach to Module Placement Problem Using Neural Networks Trans. IEICE J73A 8 1406 1414 19900000 simamoto/misc/19949178 An Approach to Channel Routing Problem Using Neural Networks. Trans. IEICE J72A 8 1287 1295 19890000 simamoto/misc/19949180 Cycle Breaking and Longest Path in Channel Routing Problem Trans. IEICE J71A 7 1411 1417 19880000 simamoto/misc/19949179 Channel Router Using Neural Networks. Trans. IEICE J71A 7 1470 1472 19880000 simamoto/misc/19949181 Akio Sakamoto 坂本 明雄 Takashi Shimamoto 島本 隆 Akio Ushida 牛田 明夫 On Routability for Channel Routing Problem Trans. 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