Takahisa Wada
Toshiba
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Publication
Featured researches published by Takahisa Wada.
IEEE Transactions on Very Large Scale Integration Systems | 2009
Takahisa Wada; Shunichi Ishiwata; Katsuyuki Kimura; Keiri Nakanishi; Masato Sumiyoshi; Takashi Miyamori; Masaki Nakagawa
High-definition video applications, such as digital TV and digital video cameras, require high processing performance for high-quality visual images in addition to a complex video CODEC. Pre-/postprocessing to improve video quality is becoming much more important because requirements for pre-/postprocessing vary among applications and processing algorithms have not been stabilized. Therefore, a new processor architecture that has a highly parallel datapath is needed. In this paper, we introduce a VLIW vector media coprocessor, ldquovector coprocessor (VCP),rdquo that includes three asymmetric execution pipelines with cascaded SIMD ALUs. To improve performance efficiency, we reduce the area ratio of the control circuit while increasing the ratio of the arithmetic circuit. The total gate count of VCP is 1268 kgates and its maximum operating frequency is 300 MHz at 90-nm CMOS process. Some of the processing kernels in an adaptive prefilter that is applied to preprocessing for video encoding are evaluated. In the case of the edgeness and the sum of absolute differences, the performance is 183 giga operations per second. VCP offers enough performance for HD video processing and good cost-performance while all processing pipeline units operate effectively.
Archive | 2012
Yasuyuki Nishibayashi; Kotaro Ise; Keiichi Teramoto; Takahisa Wada
Archive | 2013
Kyosuke Katayama; Kazuto Kubota; Takahisa Wada; Kiyotaka Matsue; Akihiro Suyama; Tomohiko Tanimoto; Hiroshi Taira
Archive | 2011
Yasuyuki Nishibayashi; Tsunetaro Ise; Keiichi Teramoto; Takahisa Wada; 恒太郎 伊瀬; 卓久 和田; 圭一 寺本; 泰如 西林
Archive | 2014
Kyosuke Katayama; 恭介 片山; Kazuto Kubota; 和人 久保田; Takahisa Wada; 卓久 和田; Kiyotaka Matsue; 清高 松江; Akihiro Suyama; 明弘 酢山; Tomohiko Tanimoto; 智彦 谷本; Hiroshi Taira; 博司 平
Archive | 2012
Yasuyuki Nishibayashi; Yoshihiro Oba; Kotaro Ise; Keiichi Teramoto; Takahisa Wada
Archive | 2010
Yasuyuki Nishibayashi; Takahisa Wada; Kotaro Ise; Keiichi Teramoto; Yusuke Doi; Yoshiki Terashima
Archive | 2006
Takahisa Wada
Archive | 2013
Kazuto Kubota; Kyosuke Katayama; Kiyotaka Matsue; Takahisa Wada; Tomohiko Tanimoto; Hiroshi Taira
Archive | 2012
Yasuyuki Nishibayashi; Takahisa Wada; Kotaro Ise; Keiichi Teramoto; Yusuke Doi; Yoshiki Terashima