Title:
ARITHMETIC ENCODING DEVICE, ARITHMETIC ENCODING METHOD, ARITHMETIC ENCODING PROGRAM, AND COMPUTER-READABLE RECORDING MEDIUM CONTAINING THE PROGRAM
Document Type and Number:
WIPO Patent Application WO/2007/102518
Kind Code:
A1
Abstract:
[PROBLEMS] To reduce a calculation amount of the process of CABAC in H.264/AVC. [MEANS FOR SOLVING PROBLEMS] An arithmetic encoding device includes: an arithmetic encoding unit for arithmetically encoding a digital symbol generated by a digitization unit; a context calculation unit for generating a context number; an update unit for updating a symbol value indicated by a superior symbol or an inferior symbol and symbol appearance possibility according to the digitized symbol generated by the digitization unit; and a possibility state storage unit for storing the symbol value and the symbol appearance possibility by using the context number calculated by the context calculation unit as an index. The arithmetic encoding unit includes: a first storage unit for storing a prediction value of a region rLPS obtained by dividing an inferior symbol section according to the generation possibility; a second storage unit different from the first storage unit, also for storing a prediction value of the rLPS; and a calculation unit for performing arithmetic encoding by referencing a prediction value of the rLPS stored in the first storage unit and the second storage unit.
Inventors:
SONG TIAN (JP)
YAMADA ATSUSHI (JP)
SHIMAMOTO TAKASHI (JP)
YAMADA ATSUSHI (JP)
SHIMAMOTO TAKASHI (JP)
Application Number:
PCT/JP2007/054358
Publication Date:
September 13, 2007
Filing Date:
March 06, 2007
Export Citation:
Assignee:
UNIV TOKUSHIMA (JP)
SONG TIAN (JP)
YAMADA ATSUSHI (JP)
SHIMAMOTO TAKASHI (JP)
SONG TIAN (JP)
YAMADA ATSUSHI (JP)
SHIMAMOTO TAKASHI (JP)
International Classes:
G06T9/00; H03M7/40; H04N1/413; H04N19/00; H04N19/189; H04N19/192; H04N19/196; H04N19/423; H04N19/503; H04N19/51; H04N19/60; H04N19/61; H04N19/82; H04N19/91
Foreign References:
| JP2005130099A | 2005-05-19 | |||
| JP2005504471A | 2005-02-10 | |||
| JP2005525018A | 2005-08-18 |
Attorney, Agent or Firm:
TOYOSU, Yasushi et al. (Kanazawa Tokushima-shi, Tokushima 71, JP)
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