Digital video signal transmitting apparatus

Details Digital video signal transmitting apparatus Digital video signal transmitting apparatus

1983-02-04

1985-12-10

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

H04N 712

Patent

active

045583625

ABSTRACT:
A digital video signal transmitting apparatus comprises a memory which is written in with a digital video signal of selected picture elements selected from among all picture elements arranged in a matrix form constituting one picture frame, where the selected picture elements are arranged at zigzag positions along either a horizontal direction or a vertical direction in the matrix form arrangement, and a control circuit for carrying out read-out control to read out a digital video signal. The memory control circuit carries out the read-out control so that signals of the selected and written in picture elements are read out as they are from the memory, and signals of selected and written in picture elements near picture elements which were not selected and not written in are read out instead of signals of the picture elements which were not selected and not written in.

REFERENCES:
patent: 3769452 (1973-10-01), Stone
patent: 3792196 (1974-02-01), Wendland
patent: 4025950 (1977-05-01), Matsumoto et al.
patent: 4068265 (1978-01-01), Russell
patent: 4286291 (1981-08-01), Taylor et al.
patent: 4292652 (1981-09-01), Yumde et al.
patent: 4425588 (1984-01-01), Baldwin
G. A. Reitmeier "Spatial Compression and Expansion of Digital Television Images", RCA Review, 1981, vol. 42, pp. 3-59.

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