Chrominance signal transcoding apparatus

Details Chrominance signal transcoding apparatus Chrominance signal transcoding apparatus

1977-03-14

1978-06-06

Murray, Richard

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 8, H04N 902

Patent

active

040939596

ABSTRACT:
In a still frame playback mode, a video disc player reproduces a carrier signal which is frequency modulated in accordance with a composite video signal representative of successive repetitions of two interlaced image fields constituting a single image frame and comprising a luminance signal component, a chrominance signal component and synchronizing information, including a color burst. An FM demodulator develops a composite video signal, which is characterized by a 180.degree. phase discontinuity in the chrominance signal component between the frame end and the succeeding frame start. A first inverter circuit inverts the phase of the color burst every other image frame piror to the processing of the composite video signal output in time base correction and drop-out compensation circuits. The corrected output is supplied to a second inverting stage where the phase of the chrominance signal component, exclusive of the color burst, is inverted every other image frame, to provide an output composite video signal conforming to the NTSC format.

REFERENCES:
patent: 3660596 (1972-05-01), Numakura
patent: 3969757 (1976-07-01), Amery
patent: 4012771 (1977-03-01), Ishigaki

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