IMAGE DECODING METHOD, IMAGE ENCODING METHOD, IMAGE DECODING DEVICE, IMAGE ENCODING DEVICE, AND IMAGE ENCODING/DECODING DEVICE

Title:

IMAGE DECODING METHOD, IMAGE ENCODING METHOD, IMAGE DECODING DEVICE, IMAGE ENCODING DEVICE, AND IMAGE ENCODING/DECODING DEVICE

Document Type and Number:

WIPO Patent Application WO/2013/001769

Kind Code:

A1

Abstract:

　An image decoding method according to one embodiment of the present invention comprises: a context control step (S204) in which a context to be used for a block to be processed is determined from a plurality of contexts; and an arithmetic decoding step (S210) in which the determined context is used to arithmetically decode a bit string corresponding to the block to be processed. In the context control step (S204), if the signal classification of a control parameter is a first type, the context is selected using a condition whereby the control parameters of the left-side adjacent block and upper adjacent block of the block to be processed are employed (S206), and if the signal classification of the control parameter is a second type, the context is determined using a condition whereby the control parameter of the upper block is not employed (S207). The second type is "cbf_luma", "cbf_cb", or "cbf_cr".

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Inventors:

SASAI HISAO
NISHI TAKAHIRO
SHIBAHARA YOUJI
SUGIO TOSHIYASU
TANIKAWA KYOKO
MATSUNOBU TORU

Application Number:

PCT/JP2012/004067

Publication Date:

January 03, 2013

Filing Date:

June 22, 2012

Export Citation:

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Assignee:

PANASONIC CORP (JP)
SASAI HISAO
NISHI TAKAHIRO
SHIBAHARA YOUJI
SUGIO TOSHIYASU
TANIKAWA KYOKO
MATSUNOBU TORU

International Classes:

H04N7/26

Other References:

THOMAS WIEGAND: "Joint Final Committee Draft (JFCD) of Joint Video Specification (ITU-T Rec. H.264 I ISO/IEC 14496-10 AVC)", JOINT VIDEO TEAM (JVT) OF ISO/IEC MPEG AND ITU-T VCEG 4TH MEETING: KLAGENFURT, 22 July 2002 (2002-07-22) - 26 July 2002 (2002-07-26), AUSTRIA
XIAOYIN CHE ET AL.: "Enhanced Context Modeling for Skip and Split Flag", JOINT COLLABORATIVE TEAM ON VIDEO CODING (JCT-VC) OF ITU-T SG16 WP3 AND ISO/IEC JTC1/SC29/WG11 4TH MEETING, 20 January 2011 (2011-01-20) - 28 January 2011 (2011-01-28), DAEGU

Attorney, Agent or Firm:

NII, Hiromori (JP)
New house Extensive 守 (JP)

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Claims:

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