Motion-compensated predictive encoder in which groups of picture

Details Motion-compensated predictive encoder in which groups of picture Motion-compensated predictive encoder in which groups of picture

1994-11-29

1998-05-26

Chin, Tommy P.

Television

Bandwidth reduction system

Data rate reduction

348419, 382251, H04N 730

Patent

active

057574340

ABSTRACT:
A device comprising an MPEG encoder (2) is provided with a preanalyser (8) which encodes each picture with a fixed step size (Q.sub.2). The preanalyser is coupled to a computing circuit (9) which computes, for each type of (I, P, B) picture, a target value (T) for the number of bits for encoding said picture, as well as a suitable distribution of the target value among the macroblocks of the picture. A proportionally integrating control circuit (7) controls the quantization step size (Q.sub.1). Since the PI control circuit does not introduce any residual errors, the desired number of bits per picture or per group of pictures is achieved within narrow limits. The output signal is eminently suitable for recording and subsequent editing.

REFERENCES:
patent: 5038209 (1991-08-01), Hang
patent: 5144424 (1992-09-01), Savatier
patent: 5231484 (1993-07-01), Gonzales et al.
patent: 5241383 (1993-08-01), Chen et al.
patent: 5291281 (1994-03-01), Paik et al.
patent: 5410351 (1995-04-01), Kojima
patent: 5426463 (1995-06-01), Reininger
patent: 5442401 (1995-08-01), Murakami et al.
patent: 5506623 (1996-04-01), Sako et al.
patent: 5532745 (1996-07-01), Senda
patent: 5543844 (1996-08-01), Mita et al.
patent: 5585853 (1996-12-01), Juri et al.
patent: 5606371 (1997-02-01), Gunnewiek et al.
"Hardware Implementation of the Framestore and Datarate Control for a Digital HDTV-VCR", a discourse held at the HDTV Symposium, in Japan, Nov. 1992.
"Coding of moving pictures and associated audio for digital storage media up to about 1.5 Mbit/s", ISO/IEC IS 11172.

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