Title:
画像符号化装置及び復号装置及びそれらの制御方法、並びに、コンピュータプログラム及びコンピュータ可読記憶媒体
Document Type and Number:
Japanese Patent JP4732203
Kind Code:
B2
Abstract:
The present invention is able to determine an encoding parameter using a simple method with little processing load or memory cost, and enables encoding of image data with excellent compression performance. To this end, a prediction error generating unit of an encoding apparatus according to the present invention calculates the difference (prediction error) between a pixel of interest and a predicted value. A prediction order conversion unit converts the prediction error to a non-negative integer, and outputs the non-negative integer as a prediction order M(e). A Golomb encoding unit performs encoding in accordance with a k parameter supplied from a k parameter updating unit. The k parameter updating unit updates the k parameter for use in the next updating based on the prediction order M(e) of the pixel of interest and the k parameter supplied to the Golomb encoding unit.
Inventors:
Hiroshi Kajiwara
Application Number:
JP2006075544A
Publication Date:
July 27, 2011
Filing Date:
March 17, 2006
Export Citation:
Assignee:
Canon Inc
International Classes:
H04N1/417; H03M7/40; H04N1/41
Domestic Patent References:
| JP2001044848A | ||||
| JP10004551A | ||||
| JP10004557A | ||||
| JP2000151422A | ||||
| JP2000115782A |
Attorney, Agent or Firm:
Yasunori Otsuka
Shiro Takayanagi
Yasuhiro Otsuka
Shuji Kimura
Shiro Takayanagi
Yasuhiro Otsuka
Shuji Kimura