Title:
IMAGE ENCODING METHOD, IMAGE DECODING METHOD, IMAGE ENCODING DEVICE, IMAGE DECODING DEVICE, AND IMAGE ENCODING/DECODING DEVICE
Document Type and Number:
WIPO Patent Application WO/2013/175756
Kind Code:
A1
Abstract:
Provided is an image encoding method that comprises: an SAO processing step (S141) in which SAO processing is carried out on a Y signal, a Cb signal, and a Cr signal that are included in a block that is a target for processing; a first flag encoding step (S142) in which a first flag (sao_merge_left_flag) is arithmetically encoded, said flag indicating whether an SAO parameter that indicates the content of the abovementioned SAO processing is the same for the block that is a target for processing and a block that is adjacent and to the left of the block that is a target for processing; and an SAO parameter encoding step (S144) in which the SAO parameter for the block that is a target for processing is arithmetically encoded if the SAO parameter for the block that is a target for processing differs from the SAO parameter of the block that is adjacent and to the left of the block that is a target for processing (Step (S143) relates to a case in which the SAO parameters do not differ). In the first flag processing step, the first flag for the Y signal, the Cb signal, and the Cr signal is arithmetically encoded using a single context.
Inventors:
TERADA KENGO
SHIBAHARA YOUJI
TANIKAWA KYOKO
SASAI HISAO
SUGIO TOSHIYASU
MATSUNOBU TORU
SHIBAHARA YOUJI
TANIKAWA KYOKO
SASAI HISAO
SUGIO TOSHIYASU
MATSUNOBU TORU
Application Number:
PCT/JP2013/003185
Publication Date:
November 28, 2013
Filing Date:
May 20, 2013
Export Citation:
Assignee:
PANASONIC CORP (JP)
International Classes:
H04N7/32
Foreign References:
| JP2009544196A | 2009-12-10 |
Other References:
CHIH-WEI HSU ET AL.: "Non-CE1: Decoupling SAO on/off from SAO type with neighbor-based contexts", JOINT COLLABORATIVE TEAM ON VIDEO CODING (JCT-VC) OF ITU-T SG16 WP3 AND ISO/IEC JTC1/SC29/WG11 JCTVC-I0199, ITU-T, 27 April 2012 (2012-04-27), pages 1 - 5, XP030052783
ELENA ALSHINA ET AL.: "Non-CE1: On SAO Type sharing between color component", JOINT COLLABORATIVE TEAM ON VIDEO CODING (JCT-VC) OF ITU-T SG16 WP3 AND ISO/IEC JTC1/SC29/WG11 JCTVC-0590, ITU-T, 2 May 2012 (2012-05-02), pages 1 - 10, XP030112353
WOO-SHIK KIM ET AL.: "Evaluation of combination of LCU SAO enable flag coding methods", JOINT COLLABORATIVE TEAM ON VIDEO CODING (JCT-VC) OF ITU-T SG16 WP3 AND ISO/IEC JTC1/SC29/WG11 JCTVC-I0601, ITU-T, 5 May 2012 (2012-05-05), pages 1 - 7, XP030053602
ELENA ALSHINA ET AL.: "Non-CE1: On SAO Type sharing between color component", JOINT COLLABORATIVE TEAM ON VIDEO CODING (JCT-VC) OF ITU-T SG16 WP3 AND ISO/IEC JTC1/SC29/WG11 JCTVC-0590, ITU-T, 2 May 2012 (2012-05-02), pages 1 - 10, XP030112353
WOO-SHIK KIM ET AL.: "Evaluation of combination of LCU SAO enable flag coding methods", JOINT COLLABORATIVE TEAM ON VIDEO CODING (JCT-VC) OF ITU-T SG16 WP3 AND ISO/IEC JTC1/SC29/WG11 JCTVC-I0601, ITU-T, 5 May 2012 (2012-05-05), pages 1 - 7, XP030053602
Attorney, Agent or Firm:
NII, Hiromori et al. (JP)
New house Extensive 守 (JP)
New house Extensive 守 (JP)
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