Color correction circuit for video recorders

Details Color correction circuit for video recorders Color correction circuit for video recorders

1975-09-17

1977-01-04

Richardson, Robert L.

Facsimile and static presentation processing

Static presentation processing

Attribute control

H04N 5795

Patent

active

040018768

ABSTRACT:
A system is provided for color correction of recorded television signals. The chroma signal is decoded to baseband using a reference subcarrier which has the same timing errors as the chroma signal. The stabilized baseband signal is remodulated onto a stable subcarrier and added back to luminance. The phase modulated subcarrier used for decoding is obtained from a phase modulator fed by reference subcarrier and modulated by the recorded signal burst phase error voltage. Provisions are made for processing signals recorded in NTSC or PAL format by converting the PAL alternate line burst switching to an unswitched NTSC format.

REFERENCES:
patent: 3624281 (1971-11-01), Phan

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