Title:
IMAGE ENCODING METHOD, IMAGE DECODING METHOD, IMAGE ENCODING DEVICE AND IMAGE DECODING DEVICE
Document Type and Number:
WIPO Patent Application WO/2011/052234
Kind Code:
A1
Abstract:
An image encoding method for the compression encoding of image data includes: a binarisation step (S110) in which a binary signal is generated by binarising an image data signal to be encoded; a context determination step (S120) in which a lower- order context, which is a context associated with the type of signal to be encoded, and a higher-order context, which is common to the lower-order context and to contexts associated with other signal types, are determined; a probability information calculation step (S130) in which encoding probability information used for arithmetic encoding of the binary signal is calculated using higher-order probability information which corresponds to the determined higher-order context and lower-order probability information which corresponds to the determined lower-order context; an arithmetic encoding step (S140) in which the binary signal is arithmetically encoded using the encoding probability information; and an update step (S150) in which the higher-order probability information and the lower-order probability information are updated on the basis of the binary signal.
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Inventors:
SASAI HISAO
NISHI TAKAHIRO
SHIBAHARA YOUJI
TANIKAWA KYOKO
NISHI TAKAHIRO
SHIBAHARA YOUJI
TANIKAWA KYOKO
Application Number:
PCT/JP2010/006440
Publication Date:
May 05, 2011
Filing Date:
November 01, 2010
Export Citation:
Assignee:
PANASONIC CORP (JP)
SASAI HISAO
NISHI TAKAHIRO
SHIBAHARA YOUJI
TANIKAWA KYOKO
SASAI HISAO
NISHI TAKAHIRO
SHIBAHARA YOUJI
TANIKAWA KYOKO
International Classes:
H04N7/26; H03M7/40
Foreign References:
| US20040008130A1 | 2004-01-15 | |||
| US5903676A | 1999-05-11 | |||
| JPH07273664A | 1995-10-20 |
Other References:
MASAYUKI HASHIMOTO: "Hierarchical Image Coding and Transmission Scheme for Telemedicine Using Segmented Haar Wavelet Transform and Golomb- Rice Codes", THE TRANSACTIONS OF THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS D-II, vol. J83-D-II, no. 1, January 2000 (2000-01-01), pages 303 - 310, XP002953114
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, 10 August 2002 (2002-08-10), pages 92 - 112
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, 10 August 2002 (2002-08-10), pages 92 - 112
Attorney, Agent or Firm:
NII, Hiromori (JP)
New house Extensive 守 (JP)
New house Extensive 守 (JP)
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