Error correction system used in picture transmission

Details Error correction system used in picture transmission Error correction system used in picture transmission

1989-12-07

1991-01-29

Peng, John K.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358135, H04N 712, H04N 718

Patent

active

049890883

ABSTRACT:
In a moving picture transmission in which each picture frame is inter-frame coded for information suppression, and coded data is divided into blocks for transmission, any changes resulting from the loss of transmission blocks in order reproduce a picture on a receiver side is automatically corrected. A receiver side calculates an area in a picture frame affected by the loss of the transmission blocks, conceals the affected picture area by using information from a former picture frame, and affected picture area. A transmitter side, having a propagation table for each encoded picture frame, which shows picture areas affected by a loss of a picture area in a former picture frame, identifies a picture area affected by the lost transmission blocks, repetitively calculates picture areas in succeeding picture frames affected by the picture area in a former picture frame which was affected by the lost transmission block up to the picture frame just before the currently coded picture frame, and encodes the currently coded picture frame without using affected picture areas in the former picture frame. The encoding is for instance intra-frame encoding.

REFERENCES:
patent: 4571618 (1986-02-01), Hatori et al.
patent: 4704628 (1987-11-01), Chen et al.
patent: 4827339 (1989-05-01), Wada et al.

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