Title:
VIDEO IMAGE ENCODING DEVICE
Document Type and Number:
WIPO Patent Application WO/2011/067883
Kind Code:
A1
Abstract:
A variable-length encoding process for video data, wherein the compression rate at the time of video image encoding is increased by improving the level encoding method in particular. A CAVLC encoding unit (22) acquires transformation and quantization coefficients which have been obtained by orthogonally transforming and quantizing video image data in each block unit, determines whether variable-length encoding is to be conducted in the encoding mode of table (A41), table (B42), or a mixture of table (A41) and table (B42) at a level encoding mode controller (39), and outputs the decision result to a level_prefix unit (40). In the table (B42), a fixed-length bit string is allocated to a level_prefix which is of at least a prescribed value. The level_prefix unit (40) performs a level_prefix encoding operation in an encoding mode in accordance with the decision result and outputs to an output controller (26).
Inventors:
YAMAGUCHI MUNEAKI (JP)
Application Number:
PCT/JP2010/006008
Publication Date:
June 09, 2011
Filing Date:
October 07, 2010
Export Citation:
Assignee:
HITACHI INT ELECTRIC INC (JP)
YAMAGUCHI MUNEAKI (JP)
YAMAGUCHI MUNEAKI (JP)
International Classes:
H03M7/40; H04N19/60; H04N19/13; H04N19/136; H04N19/176; H04N19/196; H04N19/46; H04N19/463; H04N19/503; H04N19/593; H04N19/70; H04N19/91
Domestic Patent References:
| WO2008129855A1 | 2008-10-30 |
Foreign References:
| JP2008124926A | 2008-05-29 |
Other References:
SAKAE OKUBO, H.264/AVC TEXT BOOK, 1 January 2009 (2009-01-01), pages 86, 148 - 150, 339 TO 340
Attorney, Agent or Firm:
HORI, Shiroyuki et al. (JP)
Shiroyuki Hori (JP)
Shiroyuki Hori (JP)
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