Title:
CODING DEVICE, DECODING DEVICE, CODING/DECODING SYSTEM, CODING METHOD, AND DECODING METHOD
Document Type and Number:
WIPO Patent Application WO/2012/176397
Kind Code:
A1
Abstract:
A coding device and method, which can suppress degradation of image data while guaranteeing a target compression ratio, a decoding device and method, which decode the data coded by the coding device and method, and a coding/decoding system including the coding device and the decoding device are provided. The coding device includes a predictive value data generator that sequentially generates predictive value data, a predictive error data generator that sequentially generates predictive error data, which is a difference between pixel data and the predictive value data, a coder that sequentially codes the predictive error data to sequentially generate variable-length coded data, and a coding controller that sequentially controls the coder. The coding controller sequentially calculates an accumulated value by accumulating a difference between a code length and a target code length of the variable-length coded data, and controls the coder such that the final accumulated value is 0 or lower.
Inventors:
YAMAGUCHI MASAYUKI
YAMADA AKIHISA
NAKAMAE TAKASHI (JP)
YAMADA AKIHISA
NAKAMAE TAKASHI (JP)
Application Number:
PCT/JP2012/003776
Publication Date:
December 27, 2012
Filing Date:
June 11, 2012
Export Citation:
Assignee:
SHARP KK (JP)
YAMAGUCHI MASAYUKI
YAMADA AKIHISA
NAKAMAE TAKASHI (JP)
YAMAGUCHI MASAYUKI
YAMADA AKIHISA
NAKAMAE TAKASHI (JP)
International Classes:
H03M7/40; H04N19/126; H04N19/13; H04N19/134; H04N19/136; H04N19/137; H04N19/147; H04N19/154; H04N19/182; H04N19/186; H04N19/189; H04N19/196; H04N19/50; H04N19/91
Foreign References:
| JP2010004514A | 2010-01-07 | |||
| JP2007181051A | 2007-07-12 |
Other References:
See also references of EP 2724539A4
Attorney, Agent or Firm:
MASAKI, Yoshifumi (3-6 Imabashi 4-chome, Chuo-ku, Osaka-sh, Osaka 42, JP)
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Claims: