Signal processing unit for producing a selected one of signals p

Details Signal processing unit for producing a selected one of signals p Signal processing unit for producing a selected one of signals p

1985-11-12

1989-01-31

Lall, Parshotam S.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358136, 364518, H04N 712

Patent

active

048020060

ABSTRACT:
In a predictive encoder for use particularly in a conference television system, a signal processing unit is used in producing a prediction signal and comprises three prediction circuits (22, 23, 31) and a selection circuit (24) coupled to the prediction circuits. The prediction circuits are for producing an inframe, an interframe, and a background prediction signals, respectively. Those signals are produced by processing an original signal at instants which precede a current instant and are different from one another. The selection circuit is for selecting one of the inframe, the interframe, and the background prediction signals. Therefore, it is possible to produce the prediction signal suitably predictive of the original signal. The signal processing circuit serves equally well in a predictive decoder.

REFERENCES:
patent: 4546386 (1985-10-01), Matsumoto et al.
patent: 4591909 (1986-05-01), Kuroda et al.

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