Two resolution level DPCM system

Details Two resolution level DPCM system Two resolution level DPCM system

1987-04-17

1988-05-17

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358105, 358136, 375 27, H04N 713

Patent

active

047454741

ABSTRACT:
A digital television transmitter has a buffer that receives a low resolution low pass filtered signal. A high resolution high pass filtered signal is applied to the buffer only when the buffer can accept it without overflowing. A digital television receiver receives a digital television picture signal and preferably a transmitter buffer occupancy state signal. A low resolution low pass filtered signal is applied to an adder. A high resolution high pass filtered signal is applied to the adder when the buffer state is low and also when it is intermediate and no substantial motion is present. The transmitter and receiver are useful in video teleconferencing.

REFERENCES:
patent: 3761613 (1973-09-01), Limb
patent: 3769451 (1973-10-01), Connor
patent: 3801737 (1974-04-01), Komura
patent: 4006297 (1977-02-01), Koga
patent: 4470146 (1984-09-01), Yatsuzuka et al.
patent: 4541102 (1985-09-01), Grallert
patent: 4551753 (1985-11-01), Nishizawa et al.
patent: 4562468 (1985-12-01), Koga
patent: 4583114 (1986-04-01), Catros
patent: 4598411 (1986-07-01), Berkovich
patent: 4603347 (1986-07-01), Kuroda et al.
patent: 4620225 (1986-10-01), Wendland
patent: 4672441 (1987-06-01), Hoelzlwimmer
patent: 4682225 (1987-07-01), Graham

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