Color television format using pulse frequency and pulse width mo

Details Color television format using pulse frequency and pulse width mo Color television format using pulse frequency and pulse width mo

1988-12-27

1990-07-31

Shepperd, John W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358145, 358147, H04N 1104, H04N 1100

Patent

active

049454030

ABSTRACT:
A luminance signal in a component video signal is pulse frequency modulated, and the pulse frequency modulated signal is sequentially pulse width modulated by two color difference signals alternately. Thus, the component video signal is transmitted as one pulse train signal efficiently without extending the transmission band widely. A sound signal and a data signal can also be transmitted as digital signal in the one pulse train signal. The luminance signal and two color difference signals may also be inverted line-by-line prior to being modulated.

REFERENCES:
patent: 4675721 (1987-06-01), Dirr
Mitiaki Miyazono et al., 2-channel picture transmission examination in pulse interval & width modulation method, The Institute of Electronics and Communication Engineers of Japan etc., p. G226, 1982.

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