Chrominance signal processing apparatus

Details Chrominance signal processing apparatus Chrominance signal processing apparatus

1985-10-07

1988-02-09

McElheny, Jr., Donald

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 19, 358310, 358317, H04N 983

Patent

active

047244763

ABSTRACT:
A chrominance signal processing apparatus for converting an input carrier chrominance signal received in a first operation mode to an output low-band converted chrominal signal, and for converting an input low-band converted chrominance signal received in a second operation mode to an output carrier chrominance signal includes a frequency converting circuit which performs these conversions in the respective first and second operation modes. A carrier chrominance signal carrier and a low-band converted chrominance signal carrier, both for use in the frequency converting circuit, are respectively generated by the first and second carrier generating circuits. In each of the first and second operation modes, one of the first and second carrier generating circuits is controlled to compensate for a phase error of each of the input signals. A phase error detecting circuit detects the phase error from the burst signals extracted from the output and respectively input low-band converted chrominance signals in the first and second operation modes to produce a control voltage signal for controlling the first or second carrier generating circuit. Control signals for the ACC and color killer circuit are also produced from the abovenoted burst signals.

REFERENCES:
patent: 3947871 (1976-03-01), Amari et al.
patent: 4007485 (1977-02-01), Sato
patent: 4396953 (1983-08-01), Fujita et al.
patent: 4417284 (1983-11-01), Sato
patent: 4430674 (1984-02-01), Taguchi et al.

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