Adaptive Y/C separation apparatus for TV signals

Details Adaptive Y/C separation apparatus for TV signals Adaptive Y/C separation apparatus for TV signals

1987-06-26

1988-11-22

Shepperd, John W.

Facsimile and static presentation processing

Static presentation processing

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H04N 978

Patent

active

047869631

ABSTRACT:
An adaptive luma/chroma separation apparatus is herein disclosed. Means, including delay elements and bandpass filters, are employed to generate a set of three bandpassed signals B.sub.b, M.sub.b and T.sub.b, which are delayed with respect to each other by one horizontal line period. A control signal generating circuit coupled to receive the three bandpassed signals B.sub.b, M.sub.b and T.sub.b develops a control signal K that determines the relative mixing of the signals. A combining circuit, including a soft switch, combines the three bandpassed signals in response to the control signal K to generate a separated chroma signal C.sub.b. The separated chroma signal C.sub.b is subtracted from the (non-bandpassed) main signal M to generate the luma signal Y.

REFERENCES:
patent: 4050084 (1977-09-01), Rossi
patent: 4245237 (1981-01-01), Lagoni
patent: 4422094 (1983-12-01), Lewis, Jr. et al.
patent: 4466016 (1984-08-01), Pritchard
patent: 4524423 (1985-06-01), Acampora
patent: 4636840 (1987-01-01), McNeely et al.
An article entitled "Two Dimensional Digital Decoder for Color Television Signal", presented at ICCE-87 on Jun. 3, 1987 by Nishigori et al.
An article entitled "Cost Effective Hi-Performance Color Television", presented at ICCE-87 on Jun. 4, 1987 by Kingable et al.
An article entitled "Flicker-Free Non-Interlaced Receiving System for Standard Color TV Signals", presented at ICCE-85 on Jun. 7, 1985 by Okada et al.

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