Title:
可変サブバンド処理を行う圧縮レート制御システム及び方法
Document Type and Number:
Japanese Patent JP2008514139
Kind Code:
A
Abstract:
A system, method and computer program product provide finer rate control in data compression by processing a data stream through a plurality of parallel subbands, wherein a first subband processes the data differently than a second subband. Separate shift quantization parameters for each separate run-of-zeros compressed storage area or pile can be provided, instead of a single common shift parameter for every coefficient as in the prior art. The parameter value for each such area or pile can be recorded in the compressed output file. The separate shift quantization parameters can also be adjusted dynamically as data is being compressed.
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Inventors:
Stephen E Thunders
William Sea Lynch
Klasimir Dee Kolarov
William Sea Lynch
Klasimir Dee Kolarov
Application Number:
JP2007532671A
Publication Date:
May 01, 2008
Filing Date:
September 21, 2005
Export Citation:
Assignee:
Droplet Technology, Inc.
International Classes:
H03M7/30; H04N7/26; H04N1/41
Domestic Patent References:
| JP2002508606A | 2002-03-19 | |||
| JPH07107051A | 1995-04-21 | |||
| JPH05199511A | 1993-08-06 | |||
| JP2002344748A | 2002-11-29 | |||
| JP2001326936A | 2001-11-22 | |||
| JP2001313943A | 2001-11-09 | |||
| JP2000115770A | 2000-04-21 | |||
| JPH11262004A | 1999-09-24 | |||
| JP2002543483A | 2002-12-17 |
Attorney, Agent or Firm:
Kenji Sugimura
Kosaku Sugimura
Kiyoshi Kuruma
Shiro Fujitani
Tatsuya Sawada
Eiji Fujiwara
Kosaku Sugimura
Kiyoshi Kuruma
Shiro Fujitani
Tatsuya Sawada
Eiji Fujiwara