Title:
IMAGE ENCODING METHOD, IMAGE ENCODING DEVICE, IMAGE DECODING METHOD, IMAGE DECODING DEVICE, AND IMAGE ENCODING/DECODING DEVICE
Document Type and Number:
WIPO Patent Application WO/2012/096185
Kind Code:
A1
Abstract:
An image encoding method including: a conversion step (S601) that generates a processing unit for a frequency range by frequency converting image data; a binarisation step (S602) that generates a binary signal by binarising coefficients included in the processing unit; a context determination step (S603) that determines that the context for the binary signal is one or more contexts common to a plurality of coefficients included in a segment containing binarised coefficients, said segment being one of the segments among a plurality of segments obtained by dividing the processing unit; a binary arithmetic encoding step (S604) that binary arithmetically encodes the binary signal according to the probability information for the determined contexts; and an update step (S605) that updates the probability information for the determined contexts on the basis of the binary signal.
Inventors:
SASAI HISAO
NISHI TAKAHIRO
SHIBAHARA YOUJI
SUGIO TOSHIYASU
NISHI TAKAHIRO
SHIBAHARA YOUJI
SUGIO TOSHIYASU
Application Number:
PCT/JP2012/000158
Publication Date:
July 19, 2012
Filing Date:
January 12, 2012
Export Citation:
Assignee:
PANASONIC CORP (JP)
SASAI HISAO
NISHI TAKAHIRO
SHIBAHARA YOUJI
SUGIO TOSHIYASU
SASAI HISAO
NISHI TAKAHIRO
SHIBAHARA YOUJI
SUGIO TOSHIYASU
International Classes:
H04N7/26; H03M7/40
Domestic Patent References:
| WO2009082239A1 | 2009-07-02 | |||
| WO2011052234A1 | 2011-05-05 |
Foreign References:
| JP2004266567A | 2004-09-24 | |||
| JP2006019814A | 2006-01-19 |
Other References:
JUNGONG HAN ET AL.: "Variable block-size transform and entropy coding at the enhancement layer of FGS", IMAGE PROCESSING, 2004. ICIP '04. 2004 INTERNATIONAL CONFERENCE ON, vol. 1, October 2004 (2004-10-01), pages 481 - 484
SAKAE OKUBO: "H.264/AVC Kyokasho", KABUSHIKI KAISHA IMPRESS R & D, MASANOBU ISERI, 1 January 2009 (2009-01-01), pages 153 - 157
THOMAS WIEGAND ET AL.: "Draft ITU-T Recommendation and Final Draft International Standard of Joint Video Specification", (ITU-T REC. H.264 I ISO/IEC 14496-10 AVC), JOINT VIDEO TEAM (JVT) OF ISO/IEC MPEG & ITU-T VCEG (ISO/ IEC JTC1/SC29/WG11 AND ITU-T SG16 Q.6), JVT-G050RL, 27 May 2003 (2003-05-27), pages 160 - 161
HISAO SASAI ET AL.: "Simplified Context modeling for Transform Coefficient Coding", JOINT COLLABORATIVE TEAM ON VIDEO CODING (JCT-VC) OF ITU-T SG16 WP3 AND ISO/IEC JTC1/ SC29/WG11, JCTVC-D185, 20 January 2011 (2011-01-20), pages 1 - 5
SAKAE OKUBO: "H.264/AVC Kyokasho", KABUSHIKI KAISHA IMPRESS R & D, MASANOBU ISERI, 1 January 2009 (2009-01-01), pages 153 - 157
THOMAS WIEGAND ET AL.: "Draft ITU-T Recommendation and Final Draft International Standard of Joint Video Specification", (ITU-T REC. H.264 I ISO/IEC 14496-10 AVC), JOINT VIDEO TEAM (JVT) OF ISO/IEC MPEG & ITU-T VCEG (ISO/ IEC JTC1/SC29/WG11 AND ITU-T SG16 Q.6), JVT-G050RL, 27 May 2003 (2003-05-27), pages 160 - 161
HISAO SASAI ET AL.: "Simplified Context modeling for Transform Coefficient Coding", JOINT COLLABORATIVE TEAM ON VIDEO CODING (JCT-VC) OF ITU-T SG16 WP3 AND ISO/IEC JTC1/ SC29/WG11, JCTVC-D185, 20 January 2011 (2011-01-20), pages 1 - 5
Attorney, Agent or Firm:
NII, Hiromori (JP)
New house Extensive 守 (JP)
New house Extensive 守 (JP)
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Claims: