VIR Correction system

Details VIR Correction system VIR Correction system

1981-02-04

1982-08-10

Masinick, Michael A.

Facsimile and static presentation processing

Static presentation processing

Attribute control

H04N 9535

Patent

active

043440843

ABSTRACT:
A VIR Correction system is disclosed for use in a system such as a color television receiver. Television signals of the type under consideration include a plurality of video lines, each line having a standard color burst and video chrominance. On line 19 of each television field, a VIR signal is transmitted which includes a VIR color burst and a VIR chrominance reference. The correction system includes an amplitude comparator for sensing the difference in amplitude between the VIR color burst and the VIR chrominance reference, and for developing an amplitude error signal indicative of the sensed difference. A phase comparator develops a phase error signal on sensing a phase difference between the VIR color burst and the VIR chrominance reference. A phase controller receives at least the standard color burst portion of the television signal and responds to the phase error signal for correcting the phase of the standard color burst. A gain controller receives at least the video chrominance portion of the television signal and responds to the amplitude error signal for correcting the amplitude of the video chrominance.

REFERENCES:
patent: 4215363 (1980-07-01), Borlaug
patent: 4305089 (1981-12-01), Hozoya
patent: 4306247 (1981-12-01), Tomimoto

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