Apparatus for processing a video signal

Details Apparatus for processing a video signal Apparatus for processing a video signal

1989-04-21

1991-04-09

Shepperd, John W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 20, 358 24, 358153, 358320, 358322, 360 361, H04N 514, H04N 504, H04N 979

Patent

active

050069322

ABSTRACT:
A composite video signal each line of which comprises a line synchronizing pulse, a front and a back porch and a vision portion, the synchronizing pulse of which may contain a burst of pulsed additional information is applied to an input terminal (1) which is connected to the input of a first signal path (T1, T2) whose output is connected to a current source (I1) and to an output terminal (8). A second signal path (T3, T4) has its input connected to a reference voltage input (5) and its output connected to the current source (I1) and the output terminal (8). A switching circuit (T5, T6) alternately enables the first and second signal paths (T1, T2; T3, T4) under the control of a switching signal at a connection (10) such that the output terminal (8) produces a composite video signal in which the synchronizing pulse at the input terminal is replaced by a pulse or level. The replacement does not contain the burst of pulsed additional information when present in the applied signal.

REFERENCES:
patent: 3005869 (1961-10-01), Dolby
patent: 4716461 (1987-12-01), Hinn
International Electrotechnical Commission, IEC Standard, "Pre-Recorded Optical Reflective Video-Disk System `Laser Vision` 50 H.sub.2 /625 Lines-Pal"; UAR-2516-596/8412; (1984).

Affiliated with

Also associated with

Rating

Apparatus for processing a video signal does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for processing a video signal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for processing a video signal will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2038970