Video disc player comprising clamping circuit for muse signal

Details Video disc player comprising clamping circuit for muse signal Video disc player comprising clamping circuit for muse signal

1989-07-03

1991-07-30

McElheny, Jr., Donald

Facsimile and static presentation processing

Facsimile

Recording apparatus

358315, 358322, H04N 591

Patent

active

050364049

ABSTRACT:
An FM-MUSE signal and a pilot signal are frequency-multiplexed, to be recorded on a video disc (D). In addition, a clamp level signal and an index signal are multiplexed on particular lines of a plurality of lines of the MUSE signal. The index signal is detected from the FM-MUSE signal reproduced from the video disc by a video disc player (100). Pulses of the reproduced pilot signal are counted, beginning at the time of this detection. Accordingly, the timing of generating the clamp level signal is specified, so that clamp pulses are generated. A clamping circuit (5) is provided in the video disc player, so that the clamp level signal is accurately clamped in response to the clamp pulse.

REFERENCES:
patent: 3723643 (1973-03-01), Suzuki et al.
patent: 4819086 (1989-04-01), Hayashi et al.
patent: 4916553 (1990-10-01), Yoshioka et al.
"Broadcasting and Transmission System-Muse", Ninomiya et al, Technical Papers on Third International Colloquium on Advanced Television Systems, HDTV 1987, Ottawa, Canada, Oct. 4-8, 1987.

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