Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1989-02-23
1991-02-19
Chin, Tommy P.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358 22, 358230, H04N 701
Patent
active
049949128
ABSTRACT:
A method and apparatus for synchronizing two independent rasters, such that a standard TV video and a high resolution computer generated graphics video may each be displayed on a high resolution graphics monitor. This is accomplished utilizing dual frame buffers. A TV frame buffer, comprises a dual port VRAM, with the serial and random ports operating asynchronously. The primary port receives incoming TV video synchronously as it comes in, and the secondary port reads the TV video out synchronously with the high resolution graphics monitor. A high resolution frame buffer in a computer is utilized to store high resolution graphics which is read out synchronously with the high resolution graphics monitor. A switching mechanism selects which of the TV video and the high resolution graphics video is to be displayed at a given time. The TV frame buffer includes an on screen and off screen portion. The computer provides computer data, including high resolution graphics data and audio data to the TV frame buffer, with the graphics data being stored in the on screen portion and the audio data being stored in the off screen portion. The audio data is read out to an audio circuit for replay. The graphics data is combined with the TV video for purposes of windowing.
REFERENCES:
patent: Re32201 (1986-07-01), Bradley
patent: 4282546 (1981-08-01), Reitmeier
patent: 4317114 (1982-02-01), Walker
patent: 4357624 (1982-11-01), Greenberg
patent: 4599611 (1986-07-01), Bowkes et al.
patent: 4631588 (1986-12-01), Barnes et al.
patent: 4639721 (1987-01-01), Eto et al.
patent: 4639765 (1987-01-01), D'Hont
patent: 4660070 (1987-04-01), Nishi et al.
patent: 4663617 (1987-05-01), Stockwell
patent: 4680634 (1987-07-01), Nanba et al.
patent: 4710873 (1987-12-01), Breslow et al.
patent: 4739405 (1988-04-01), Sumida
patent: 4777486 (1988-10-01), Abraham et al.
patent: 4789854 (1988-12-01), Ishii
patent: 4812909 (1989-03-01), Yokobayashi et al.
patent: 4831441 (1989-05-01), Ando
patent: 4851826 (1989-07-01), Davis
patent: 4851909 (1989-07-01), Noske et al.
patent: 4855813 (1989-08-01), Russell et al.
patent: 4862154 (1989-08-01), Gonzalez-Lopez
patent: 4862156 (1989-08-01), Westberg et al.
patent: 4866520 (1989-09-01), Nomura et al.
patent: 4870406 (1989-09-01), Gupta et al.
Lumelsky Leon
Peevers Alan W.
Arnold Jack M.
Chin Tommy P.
International Business Machines - Corporation
LandOfFree
Audio video interactive display does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Audio video interactive display, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Audio video interactive display will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1148615