Picture-in-picture video signal generator

Details Picture-in-picture video signal generator Picture-in-picture video signal generator

1987-03-23

1989-06-13

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 22, H04N 5262, H04N 5272

Patent

active

048397288

ABSTRACT:
A picture-in-picture video signal generator includes a source of an auxiliary video signal, and a producer of successive samples representing the auxiliary video signals. A self-sequencing memory includes a data input terminal coupled to the producer of auxiliary video samples; a write address input terminal, for receiving an initial write address; a data output terminal and a read address input terminal for receiving an initial read address. Write control circuitry is coupled to the write address terminal of the self-sequencing memory, and generates initial write addresses in synchronism with horizontal line intervals of the auxiliary video signal. A source of a main video signal is also provided. Read control circuitry is coupled to the read address terminal of the self-sequencing memory, and generates initial read addresses in synchronism with horizontal line intervals of the main video signal. The main video signal is combined with samples from the self-sequencing memory to form a video signal representing a picture-in-picture image.

REFERENCES:
patent: 4249213 (1981-02-01), Imaide et al.
patent: 4267560 (1981-05-01), Ishikawa et al.
patent: 4623915 (1986-11-01), Bolger
patent: 4656516 (1987-04-01), Fling
patent: 4724487 (1988-02-01), Casey
"LM1881 Video Sync Separator"; National Semiconductor; Apr. 1986.

Affiliated with

Also associated with

Rating

Picture-in-picture video signal generator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Picture-in-picture video signal generator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Picture-in-picture video signal generator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1281393