Apparatus for recording and reproducing band-compression coded v

Details Apparatus for recording and reproducing band-compression coded v Apparatus for recording and reproducing band-compression coded v

1991-10-23

1994-09-27

Young, W. R.

Facsimile and static presentation processing

Facsimile

Recording apparatus

360 331, 360 40, 360 48, 348405, H04N 591

Patent

active

053511310

ABSTRACT:
Disclosed are a video signal recording apparatus for dividing digital video signal into blocks, transforming orthogonally, quantizing, coding in a variable length, and recording always in identical data quantity in a unit of specific number of blocks, and a video signal reproducing apparatus for decoding the recorded signal in variable length, quantizing inversely, transforming inversely and orthogonally, and reproducing the original digital video signal. The coding data in the specific number of blocks in the identical data quantity is divided in two code rows, the individual low frequency components are assigned to separate sync blocks, and high frequency components are also assigned to separate sync blocks, and recorded. When reproducing, if the sync block of high frequency components is wrong, it is possible to decode only with low frequency components, and the screen is reproduced at high fidelity to the reproducing speed at the time of high speed reproducing. By recording the position information indicating the boundary position between two code rows, or the concealment information showing the concealment state, even by variable length coding, the range of error concealment may be narrowed, and the effects of error may be minimized.

REFERENCES:
patent: 4984076 (1991-01-01), Watanabe et al.
patent: 5047852 (1991-09-01), Hanyu et al.
patent: 5051840 (1991-09-01), Watanabe et al.
patent: 5073821 (1991-12-01), Juri
patent: 5191436 (1993-03-01), Yonemitsu
Patent Abstracts of Japan, vol. 14, No. 414, (E-975), & JP2-159185, Sep. 7, 1990.
Patent Abstracts of Japan, vol. 14, No. 182, (E-916), & JP2-32688, Apr. 12, 1990.
Patent Abstracts of Japan, vol. 14, No. 359, (E-959), & JP 2-124690, Aug. 3, 1990.

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