Method of video encoding by accumulated error processing and enc

Details Method of video encoding by accumulated error processing and enc Method of video encoding by accumulated error processing and enc

1996-09-23

1998-03-24

Britton, Howard W.

Television

Bandwidth reduction system

Data rate reduction

348416, 382308, H04N 730, H04N 750

Patent

active

057318360

ABSTRACT:
The present invention relating to a method of video coding associated with processing accumulated errors and a encoder therefor, the method comprising the steps of: (a) generating motion vectors of an input image in a predetermined unit and the difference image between an image of filtering a motion-compensated image on a reconstructed previous frame and the input image on current frame, and then performing discrete cosine transform (DCT), quantization and variable length coding on the difference image; (b) generating the motion-compensated image on the reconstructed previous frame from the reconstructed previous frame and the motion vectors; and (c) filtering off accumulated errors while preserving the edges within the motion-compensated image on the reconstructed previous frame. Therefore, random distributed noises due to accumulated errors can be removed and bit generation amounts by filtering off random accumulated errors with a high frequency characteristics before coding can be reduced.

REFERENCES:
patent: 4665554 (1987-05-01), Sternberg
patent: 5325125 (1994-06-01), Naimpally
patent: 5365271 (1994-11-01), Asano
patent: 5420638 (1995-05-01), Riglet
patent: 5436984 (1995-07-01), Serkkinen
patent: 5583947 (1996-12-01), Florent
"Video Codec For Audiovisual Services At p x 64 kbit/s", The International Telegraph and Telephone Consultative Committee, Geneva, 1990, Recommendation H.261, pp. 1-27.
Limin Wang, "Error Accumulation in Hybrid DPCM/CDT Video Coding", SPIE, vol. 2308, pp. 343-352.

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