Method for reducing blocking artifacts in video scene coding wit

Details Method for reducing blocking artifacts in video scene coding wit Method for reducing blocking artifacts in video scene coding wit

1989-06-07

1990-07-10

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358136, H04N 7133

Patent

active

049410431

ABSTRACT:
A method for reducing what are referred to as blocking artifacts in a video scene coding with discrete cosine transformation (DCT) at a low data rate is provided in a video signal transmission system, having a transmit-side video signal input to which a video signal to be transmitted is supplied. A transmit-side coder transmits frequency limitation parameters allocated to the individual blocks of the video signal to be divided into a plurality of blocks at a receive-side decoder, via a transmission channel, together with a block-associated video sub-signal that is coded by the coder. The frequency limitation parameters are used at the receive side to control a block filter function at the output of the decoder that outputs a decoded video signal, controlling this for postprocessing of the decoded video signal for the purpose of reducing the blocking artifacts.

REFERENCES:
patent: 4814871 (1989-03-01), Keeson
patent: 4831440 (1989-05-01), Borgers
patent: 4833535 (1989-05-01), Ozeki
patent: 4837724 (1989-06-01), Borgers
Kato, "A Motion Picture Coding Algorithm Using Adaptive DCT Encoding Based on Coefficient Power Distribution Classification", IEEE Journal on Selected Areas in Communications, vol. SAC-5, No. 7, Aug. 1987.

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