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Title:
ビデオ圧縮における係数レベルコーディングのコンテキスト
Document Type and Number:
Japanese Patent JP5869115
Kind Code:
B2
Abstract:
This disclosure describes techniques for coding video data. In particular, this disclosure describes techniques for entropy coding of residual transform coefficients generated by a video coding process. In one example, a method selects a bin 2 context for coding a bin 2 level of one or more transform coefficients in the vector according to the entropy coding process. The method further codes the bin 2 level of one or more transform coefficients in the vector according to the selected bin 2 context. Selecting the bin 2 context comprises selecting the bin 2 context for a current transform coefficient in the vector based on the bin 2 level of one or more previously coded transform coefficients in the vector.

Inventors:
Sol Rojars, Joel
Joshi, Rajan Luxman
Kirk Zewicks, Malta
Application Number:
JP2014519192A
Publication Date:
February 24, 2016
Filing Date:
June 29, 2012
Export Citation:
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Assignee:
QUALCOMM INCORPORATED
International Classes:
H04N19/13; H04N19/136; H04N19/18; H04N19/91
Domestic Patent References:
JP2005530375A
JP2005504471A
JP2010532141A
JP2014502827A
Foreign References:
US5381145
Other References:
Sole, J., et.al.,"Unified scans for the significance map and coefficient level coding in high coding efficiency",[online],Joint Collaborative Team on Video Coding (JCT-VC) of ITU-T SG16 WP3 and ISO/IEC JTC1/SC29/WG11,2011年 3月19日,Document: JCTVC-E335(version 3),[平成26年12月19日検索] ,インターネット,URL,http://phenix.int-evry.fr/jct/doc_end_user/documents/5_Geneva/wg11/JCTVC-E335-v3.zip
Vivienne Sze,"Context selection complexity in HEVC CABAC",[online],Joint Collaborative Team on Video Coding (JCT-VC) of ITU-T SG16 WP3 and ISO/IEC JTC1/SC29/WG11,2011年 1月22日,Document: JCTVC-D244(version 2),[平成26年12月19日検索] ,インターネット,URL,http://phenix.it-sudparis.eu/jct/doc_end_user/documents/4_Daegu/wg11/JCTVC-D244-v2.zip
Marpe, D., et.al.,"Context-Based Adaptive Binary Arithmetic Coding in the H.264/AVC Video Compression Standard",IEEE Transactions on Circuits and Systems for Video Technology,2003年 7月,Vol.13, No.7,p.620-636,ISSN:1051-8215
Schwarz, H.,et.al.,"Improved CABAC",[online],Joint Video Team (JVT) of ISO/IEC MPEG & ITU-T VCEG (ISO/IEC JTC1/SC29/WG11 and ITU-T SG16 Q.6),2005年 1月17日,Document: JVT-C060,[平成27年11月27日検索], インターネット,URL,http://wftp3.itu.int/av-arch/jvt-site/2002_05_Fairfax/JVT-C060r1-L.doc
大久保榮監修,「インプレス標準教科書シリーズ 改訂三版H.264/AVC教科書」,日本,株式会社インプレスR&D,2009年 1月 1日,第1版,第148~162頁,ISBN:978-4-8443-2664-9
亀山渉(外1名)監修,「インプレス標準教科書シリーズ IPTV時代のデジタル放送教科書」,日本,株式会社インプレスR&D,2010年 4月 1日,初版,第158~161頁,ISBN:978-4-8443-2853-7
Attorney, Agent or Firm:
Kurata Masatoshi
Yoshihiro Fukuhara
Nobuhisa Nogawa
Takashi Mine
Naoki Kono
Katsu Sunagawa
Morisezo Iseki
Takao Ako
Tadashi Inoue
Tatsushi Sato
Takashi Okada
Mihoko Horiuchi