Apparatus for restoring the correct phase relation of the chroma

Details Apparatus for restoring the correct phase relation of the chroma Apparatus for restoring the correct phase relation of the chroma

1990-05-31

1992-01-21

Shepperd, John W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358323, 358326, H04N 989

Patent

active

050831976

ABSTRACT:
Apparatus is disclosed for processing the chroma and luminance signals reproduced from a magnetic recording medium. The chroma signal in passing through a separate path from the luminance signal may suffer a phase displacement relative to the phase of the reference luminance signal. Means are provided for connection between the chroma channel and the luminance channel to generate an error signal representing the phase displacement of the chroma signal relative to the reference luminance signal. Additional means are provided to use this phase error signal to restore the phase of the chroma signal to its original phase relative to the reference luminance signal, whereby to insure the accuracy with which the signals modulating the chroma carrier can be demodulated.

REFERENCES:
patent: 4001876 (1977-01-01), Schless et al.
patent: 4590510 (1986-05-01), Jensen et al.
patent: 4825299 (1989-04-01), Okada et al.

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