Video signal transmitter/receiver

Details Video signal transmitter/receiver Video signal transmitter/receiver

1992-04-16

1993-11-16

Peng, John K.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358108, 358181, 34082524, H04N 708, H04N 718, H04N 5268

Patent

active

052628590

ABSTRACT:
A video signal transmitter/receiver apparatus and method is provided for automatically switching the aspect ratio at a receiving device. A video transmitter outputs a chrominance signal and a luminance signal separately, and converts the chrominance signal into a low impedance. A transistor and resistive divider network superpose a DC voltage controlled by an aspect ratio control signal on an output signal. A receiving unit inputs the chrominance signal and the luminance signal separately and comprises a discrimination circuit that detects the DC control voltage superposed on the chrominance signal.

REFERENCES:
patent: 3955047 (1976-05-01), Willis
patent: 4581644 (1986-04-01), Deiss
patent: 4891703 (1990-01-01), Noudan
patent: 5070404 (1991-12-01), Bullock et al.
patent: 5134483 (1992-07-01), Imbert et al.
Y. Nagaoka, M. Tsuruta and H. Fujiwara, "High Performance VTR based on the S-VHS Format", IEEE Transactions on Consumer Electronics, vol. 34. No. 3, pp. 560-565 (1988).

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