G - Physics – 11 – B
Patent
G - Physics
11
B
352/11
G11B 5/012 (2006.01)
Patent
CA 1131770
RCA 69,500 Div.A VIDEO DISC SYSTEMS Abstract of the Disclosure Color encoding format for a color picture infor- mation record, and recording apparatus therefor, are disclosed for recording of discs for use with both (1) disc players designed to provide PAL-type outputs for driving PAL-type color television receivers, and (2) disc players designed to provide SECAM-type outputs for driving SECAM-type color television receivers. In players, up-con- version of recovered composite signal precedes comb filtering to separate luminance and chrominance components. Decoding of up-converted chrominance component, to obtain base- band color-difference signal information is followed by remodulation of a carrier pursuant to a desired output format. Comb filter arrangements of U.S. Patent No. 3,969,757 are used when up-conversion shifts color subcarrier to a frequency in vicinity of PAL subcarrier frequency, but bearing odd integral multiple relationship to half the line frequency. Differing comb filter arrangements are employed when up-conversion shifts color subcarrier to PAL subcarrier frequency. Demodulation/remodulation arrange- ment involving the separate detection and remodulation use of two color-difference signals, as well as system requiring detection and remodulation use of only one color-difference signal, are disclosed. - 1 -
384435
Carnt Peter S.
Rutishauser Ernst A.
Schiess Jorg
Morneau Roland L.
Rca Corporation
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