Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
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.
Eude Gerard
Guichard Jacques
LandOfFree
Process for coding by transformation for the transmission of pic does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for coding by transformation for the transmission of pic, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for coding by transformation for the transmission of pic will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2171756