Processing encoded signals

Details Processing encoded signals Processing encoded signals

1997-10-06

2000-09-26

Britton, Howard

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

348403, 348409, 348699, 382232, 382238, H04N 712, H04B 166

Patent

active

061251402

ABSTRACT:
A frame of time-domain video signals Si is supplied via a frame reorderer (40) to a motion vector estimator (41), and then to a DCT transformer (43) and a quantizer (44) to produce a quantized, transformed current frame S.sup.T i/q. A subtracter (42) subtracts a transformed quantized prediction frame S.sup.T p/q from S.sup.T i/q to produce an inter-encoded signal .DELTA.. The prediction frame S.sup.T p/q is produced by adding the prediction signal to S.sup.T p/q to the inter-encoded signal .DELTA., dequantizing (46) and inverse transforming (47) the sum and applying the sum to a motion compensation circuit (49) to produce a time domain prediction signal Sp which is transformed (50) and quantized (51) to produce S.sup.T p/q The quantizers (44) and (51) are controlled by the same quantization level Qv. The encoder and a corresponding decoder allow frames to be encoded and decoded with reduced reconstruction errors in systems where compress ion codecs are cascaded.

REFERENCES:
patent: 4654704 (1987-03-01), Lipel
patent: 5321440 (1994-06-01), Yanagihara et al.
patent: 5623424 (1997-04-01), Azadegan et al.
patent: 5684714 (1997-11-01), Yogeshwar et al.
patent: 5742347 (1998-04-01), Kandlur et al.
patent: 5796434 (1998-08-01), Lempel
patent: 5831688 (1998-11-01), Yamada et al.
patent: 5847762 (1998-12-01), Canfield et al.

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