Motion video compression system with inverse discrete cosine tra

Details Motion video compression system with inverse discrete cosine tra Motion video compression system with inverse discrete cosine tra

1994-03-21

1997-02-18

Gaffin, Jeffrey A.

Coded data generation or conversion

Quantizer

H03M 100

Patent

active

056045026

ABSTRACT:
A novel method and apparatus is disclosed for controlling inverse discrete cosine transform ("IDCT") mismatch between an encoder and decoder using different IDCT implementations under all coding conditions. Sychronization between the encoder and decoder is forced by selectively setting certain small DCT coefficients, which are prone to mismatch, to zero at the encoder. Advantageously, the invention may be implemented solely in the encoder to minimize system complexity and cost, and allow for IDCT mismatch control utilizing conventional decoders.

REFERENCES:
patent: 4540973 (1985-09-01), Grallert
patent: 4734767 (1988-03-01), Kaneko et al.
patent: 5101280 (1992-03-01), Moronaga et al.
patent: 5121216 (1992-06-01), Chen et al.
W. Jass et al., "A Versatile DCT Coding System for HDTV with Interlaced and Progressive Scanning," Signal Processing: Image Communication, vol. 4, No. 4, Aug. 1, 1992, pp. 389-399.
"IEEE Standard Specifications for the Implementions of 8.times.8 Inverse Discrete Cosine Transform," IEEE STD 1180-1990, Mar. 18, 1991, New York, New York, pp. 1-13.
Yasuo Katayana, "Coding of Moving Pictures and Associated Audio-Protection from IDCT Mismatch", Mar. 1993.
Yagasaki, "Coding of Moving Pictures and Associated Audio-Oddification Problem for IDCT Miss-Match", Mar. 29, 1993.
Sang UK Lee, and IL Dong Yun, "On the Fixed-Point-Error Analysis of Several Fast DCT Algorithms", Feb. 1993, pp. 27-41.
CCITT Recommendation H.261-"Video Codec for Audiovisual Services at p.times.64 Kbits/s", 1992.
Motion Pictures Expert Group Phase 1-"Coding of Moving Pictures and Associated Video for Digital Storage Media at up to about 1.5 Mbits/s", Committee draft ISO/IEC CD 11172, 1991.
Motion Pictures Expert Group Phase 2-"Coded Representation of Picture and Audio Information", Test Model 1, Draft Rev. 2, 1993.

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