Title:
固定長ブロックの効率的な圧縮および圧縮解除
Document Type and Number:
Japanese Patent JP4627812
Kind Code:
B2
Abstract:
An MPEG decoder (14, 18, 22) in a high definition television receiver decodes and decompresses MPEG coded data to produce decompressed image pixel blocks, and includes a motion compensation network (90, ...) coupled to a frame memory (60) to produce finally decoded pixel data for display. The decompressed MPEG data is recompressed by plural parallel recompressors (40, 42) prior to storage in frame memory. Each recompressor receives a datastream of interleaved pixel data (24, 27; Fig. 5), and predicts and compresses interleaved pixel values (a, c) during each clock cycle, respectively (Fig. 20, 27). One of the recompressors (42) is de-energized in a reduced data processing mode when pixel data is subsampled (36, 38) prior to recompression. Subsampled data is re-ordered (43) prior to recompression. Multiple parallel decompressors (80, 82, 84) coupled to the frame memory provide pixel data to the motion processing network. A control unit (356, 360, 364, Fig. 23) insures an uninterrupted interleaved data flow to the decompressors by repeating last valid data when source data is interrupted.
Inventors:
Clana Wetter, Greg, Alan.
Schulz, Mark, Alan.
Schulz, Mark, Alan.
Application Number:
JP52767098A
Publication Date:
February 09, 2011
Filing Date:
September 30, 1997
Export Citation:
Assignee:
THOMSON CONSUMER ELECTRONICS,INCORPORATED
International Classes:
H04N7/32; G06F1/16; G06F12/00; G06F15/00; G06T9/00; H03M7/30; H03M7/40; H04N5/44; H04N5/46; H04N7/26; H04N7/30; H04N7/46; H04N7/50; H04N11/04; H04N19/593; H04N19/895
Domestic Patent References:
| JP7321666A |
Attorney, Agent or Firm:
Yoshikazu Tani
Kazuo Abe
Kazuo Abe