Image encoding and transmitting system

Details Image encoding and transmitting system Image encoding and transmitting system

1992-07-06

1996-04-23

Britton, Howard W.

Television

Bandwidth reduction system

Data rate reduction

348407, 348423, H04N 750

Patent

active

055108393

ABSTRACT:
An image encoding and transmitting system is an image transmission system for transmitting digital data such as TV telephones. The system for dividing input frame data into a plurality of blocks before transmitting them comprises on its sending side an intra-frame/inter-frame determiner for receiving intra-frame data and inter-frame data and selecting either of them for output, and a difference collator for having the intra-frame/inter-frame determiner compulsorily output intra-frame data at the time of data input for the next frame when one or more data in each block forming inter-frame data are larger than a predetermined threshold. The system also comprises on its receiving side an picture element domain frame data storage for storing received data in the picture element domain, and a motion vector detector for detecting according to the contents in the storage a motion vector using the data in the block surrounding the discarded block in order to guess the data in the discarded block.

REFERENCES:
patent: 4807053 (1989-02-01), Heijnemans
patent: 4837618 (1989-06-01), Hatori
patent: 4982285 (1991-01-01), Sugiyama
patent: 5134477 (1992-07-01), Knauer
patent: 5247363 (1993-09-01), Sun

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