Video compression coding apparatus and video compression recordi

Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium

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Details

348405, 348419, H04N 592, H04N 712, H04N 1102, H04N 1104

Patent

active

059785446

ABSTRACT:
The object of the present invention is to provide a video compression coding apparatus which, in the case where a code quantity variation allows a greater margin, can compress video data while suppressing any degradation of a video quality. First, input video data, after being transformed by a DCT section to a DCT coefficient, is quantized, by a quantizing section, with a quantization level designated with quantization control data. This quantized data is input to a variable length coding section where it is compression-coded in a block unit corresponding to a field or frame. A code quantity detecting section detects a code quantity of this coded data and delivers a result of detection to a quantization control section. The quantization control section has a given coding quantity-quantization level control characteristic representing a relation, to the quantization level, of the code quantity which obtains an average code quantity of initially input video data. The quantization control section determines a quantization level of the next block on the basis of the control characteristic and code quantity information from the code quantity detecting section and generates corresponding quantization control data.

REFERENCES:
patent: 4093962 (1978-06-01), Ishiguro et al.
patent: 5032927 (1991-07-01), Watanabe et al.
patent: 5040061 (1991-08-01), Yonemitsu
patent: 5239382 (1993-08-01), Hatakenaka et al.
patent: 5274457 (1993-12-01), Kobayashi et al.
patent: 5333012 (1994-07-01), Shinghal et al.
patent: 5351083 (1994-09-01), Tsukagoshi
patent: 5374958 (1994-12-01), Yanagihara
patent: 5410351 (1995-04-01), Kojima
patent: 5576758 (1996-11-01), Arai et al.

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