Variable aspect ratio television receiver

Details Variable aspect ratio television receiver Variable aspect ratio television receiver

1981-04-24

1983-07-19

Martin, John C.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358146, 358237, H04N 322, H04N 574

Patent

active

043946909

ABSTRACT:
A variable aspect ratio television receivier, which can receive a non-standard television signal containing an identification signal superimposed upon video signal for the first several horizontal scanning lines in the vertical scanning period. An AND gate is adapted to detect the aforementioned identification signal as such if the signal has a frequency within a range sufficiently higher than to the horizontal scanning frequency and lower than and sufficiently distinguishable from the color sub-carrier frequency, and has a sufficient level within a range conforming to the broadcasting standard continuously for a predetermined period in its predetermined section, and the output of the AND circuit is used to drive a deflection amplitude switch relay circuit for controlling the horizontal deflection amplitude of the image reproduction.

REFERENCES:
patent: 3097262 (1963-07-01), Ehrenhaft
patent: 3493674 (1970-02-01), Houghton
patent: 4233628 (1980-11-01), Ciciora

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