Color television coding circuit

Details Color television coding circuit Color television coding circuit

1982-04-22

1984-10-23

Masinick, Michael A.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 19, H04N 938

Patent

active

044791410

ABSTRACT:
NTSC-color television coding circuit comprising a series arrangement formed by a color difference signal matrix circuit, an I-signal and Q-signal matrix circuit, two low-pass filters, a modulator circuit and a superposition stage for supplying a quadrature-modulated chrominance signal. In order to obtain the chrominance sub-carrier burst in the chrominance signal, a burst-gate signal the pulse leading edge of which is produced before the beginning of the burst, is added to the -(B-Y) color difference signal. The chrominance signal in which the prolonged burst is distorted at the beginning by the filter is applied to a signal blanking circuit in which the distorted beginning is blanked and the burst in accordance with the standard is present in the chrominance signal obtained. Now, the burst amplitude can be adjusted, without a phase shift, by means of one potentiometer.

REFERENCES:
patent: 4200881 (1980-04-01), Carnt

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