Mixing of SECAM color-T.V. signals

Details Mixing of SECAM color-T.V. signals Mixing of SECAM color-T.V. signals

1977-12-22

1979-07-17

Martin, John C.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 23, H04N 9535

Patent

active

041617487

ABSTRACT:
A plurality of SECAM color-T.V. signals are to be mixed. Each comprises a luminance component and an FM color component. For each individual signal, the color component is separated from the luminance component, frequency-demodulated, amplitude-modulated, and then superimposed upon the respective luminance component to form a frequency-multiplexed modified signal. The plurality of thusly modified signals are then mixed using a single mixing channel. The mixed luminance component and the mixed color component are separated on the basis of frequency, and the mixed color component is amplitude-demodulated, then frequency-modulated and then superimposed upon the mixed luminance component, to yield a SECAM color-T.V. signal which constitutes a mix of the original signals.

REFERENCES:
patent: 3296367 (1967-01-01), Cassagne et al.

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