Method and apparatus for generating a S.E.C.A.M. modulating sign

Details Method and apparatus for generating a S.E.C.A.M. modulating sign Method and apparatus for generating a S.E.C.A.M. modulating sign

1985-03-29

1987-05-12

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

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H04N 965

Patent

active

046654348

ABSTRACT:
In an encoding circuit for the S.E.C.A.M. color television standard a signal value is added to each one of two line-sequential color difference signals to determine the quiescent frequencies. The modulating signal containing the color difference signals is subjected to double sided amplitude limitation. The ratio of the level difference between the limitation limits to the difference between the added signal values is substantially constant. The signal path for the modulating signal to the FM-oscillator comprises a controllable amplifier, limitation being effected first followed by amplification.

REFERENCES:
patent: 3984863 (1976-10-01), Fessard

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