Process for coding by transformation for the transmission of pic

Details Process for coding by transformation for the transmission of pic Process for coding by transformation for the transmission of pic

1987-06-01

1989-01-03

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358105, H04N 713

Patent

active

047960876

ABSTRACT:
A process for coding by transformation for the transmission of an image signal, comprises a stage of breaking down the image into blocks, each block containing a set of matrix-organized digital data and representing part of the picture, said process being characterized in that it comprises, for each block a step of detecting the movement of the block by comparing said block of the current image with the corresponding block of the preceding image, transmitting a non-refreshing code for the block and an identification code for the block in the image if the block is fixed, if a movement is detected in the block, breaking down the block into several subblocks, movement detection in each subblock by comparison with the corresponding subblock of the corresponding block of the preceding picture and transmission of a code which is a function of the movement of the subblock, if the block is moving.

REFERENCES:
patent: 4245248 (1981-01-01), Netravali
patent: 4661849 (1987-04-01), Hinman
patent: 4661853 (1987-04-01), Roeder
patent: 4691329 (1987-09-01), Juri
patent: 4695882 (1987-09-01), Wada
ICASSP '85 Proceedings (Mar. 1985), pp. 371-374.
Globecom '85 (Dec. 1985), pp. 689-693.
The Bell System Technical Journal (Sep. 1979), pp. 1703-1717.
IEEE Transactions On Communications (Dec. 1981), pp. 1799-1808.

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