Method of receiving a video signal

Details Method of receiving a video signal Method of receiving a video signal

1978-05-12

1981-09-29

Orsino, Jr., Joseph A.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358134, H04N 712

Patent

active

042926521

ABSTRACT:
In receiving a narrow band video signal transmitted through a narrow band transmission line such as a telephone line, a sound tape recorder or the like, the narrow band video signal is first stored in memories and is then read out therefrom at a higher reading-out speed than the writing-in speed so that the band allocated to the read-out signal is broadened to facilitate the display of the video signal. When reading out the video signal from the memories, the timing of reading out even lines constituting a display image of the video signal is shifted from the timing of reading out odd lines constituting the same display image by a time substantially equal to half the reciprocal of the frequency in terms of the bandwidth of the read-out video signal, the reciprocal corresponding to the resolution limit for the received video signal.

REFERENCES:
patent: 2810780 (1957-10-01), Loughlin
patent: 2921124 (1960-01-01), Graham
patent: 3136847 (1964-06-01), Brown
patent: 3372228 (1968-03-01), Law
patent: 3663749 (1972-05-01), Cannon
patent: 3919716 (1975-11-01), Yumde et al.
patent: 3950607 (1976-04-01), Southworth et al.
patent: 3982063 (1976-09-01), Brown et al.
patent: 4053931 (1977-10-01), Hawkins et al.
Still Picture Transmission Apparatus by Pom Sys.-Nat. Meeting of Inst. of Television Engs. of Japan, 1976, p. 271, 15-5.
Cassette Picture Recording System-IEEE Tokyo Section, Denshi Tokyo, 1975, pp. 16-18.

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