Constant luminance tint reference

Details Constant luminance tint reference Constant luminance tint reference

1979-07-11

1980-10-14

Richardson, Robert L.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 21V, 358 30, H04N 952

Patent

active

042284570

ABSTRACT:
In a VIR-responsive Tint Control system a dematrixing circuit for synthesizing, from the individual chrominance demodulator outputs, a ZERO-COLOR reference signal. The VIR chrominance interval signal and the ZERO-COLOR reference signals are used as input to a feedback loop that also includes the receiver's chrominance subcarrier oscillator. By comparing the VIR chrominance interval signal to the synthesized ZERO-COLOR reference subcarrier oscillator phase errors are corrected by virtue of a single sampling of the VIR signal.

REFERENCES:
patent: 3780218 (1973-12-01), Rennick

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