Title:
符号化装置及び符号化方法並びに記憶媒体
Document Type and Number:
Japanese Patent JP4545980
Kind Code:
B2
Abstract:
A code length of image coded data is length-fixed in accordance with a code length representing a required criterion. For this purpose, a discrete wavelet transformation unit 110 performs discrete wavelet transformation of image data. A factor quantization unit 112 performs quantization. An entropy coding unit 113 performs entropy coding of a factor quantized value by arithmetic coding. If the code length of quasi image coded data is longer than the code length designated by a designated image coded data code length inputting unit 102 , entropy coded values are deleted in the unit of sub-bands so that the code length of the quasi image code data equals the designated code length. If the code length of quasi image coded data is shorter than the designated code length, adjustment bits are added.
More Like This:
Inventors:
Yuki Kishi
Application Number:
JP2001109003A
Publication Date:
September 15, 2010
Filing Date:
April 06, 2001
Export Citation:
Assignee:
Canon Inc
International Classes:
H04N19/60; G06T9/00; G10L19/00; G10L19/02; H03M7/30; H03M7/40; H04N1/41; H04N7/52; H04N11/04; H04N19/102; H04N19/132; H04N19/134; H04N19/146; H04N19/172; H04N19/196; H04N19/33; H04N19/34; H04N19/46; H04N19/63; H04N19/70; H04N19/91; H04N21/2343; H04N5/44; H04N21/462
Domestic Patent References:
| JP3062789A | ||||
| JP11144052A | ||||
| JP10285407A | ||||
| JP5137114A | ||||
| JP3078380A |
Attorney, Agent or Firm:
Yasunori Otsuka
Shiro Takayanagi
Yasuhiro Otsuka
Shuji Kimura
Shiro Takayanagi
Yasuhiro Otsuka
Shuji Kimura