Color television standard identification circuit

Details Color television standard identification circuit Color television standard identification circuit

1989-02-14

1990-06-12

Chin, Tommy P.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 24, 358 11, H04N 966, H04N 5455

Patent

active

049337491

ABSTRACT:
A PAL-NTSC color television standard identification circuit, comprising a first demodulation circuit (7) for a reference component and a second demodulation circuit (11) for a possible color identification component of a color synchronizing signal, can perform a reliable identification by means of a digital decoding circuit (81) for the output signals of the demodulation circuits if the second demodulation circuit (11) is adapted (41, 45, 49) to demodulate along an axis slightly differing from the axis of the color identification component (FIG. 1).

REFERENCES:
patent: 3839649 (1974-10-01), Morio
patent: 4148058 (1979-04-01), Harwood et al.
patent: 4644388 (1987-02-01), Douziech et al.
patent: 4686560 (1987-08-01), Balaban et al.
patent: 4739390 (1988-04-01), Achiha et al.
IEEE Transactions on Consumer Electronics, vol. CE-31, No. 3, Aug. 85, pp. 147-155, IEEE, N.Y., U.S.A.; A. Pery et al.: "A Fully Automatic Multistandard TV Chrominance Decoder"; FIGS. 2, 5.

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