Video capture expansion card

Details Video capture expansion card Video capture expansion card

1993-07-15

1996-08-27

Hjerpe, Richard

Computer graphics processing and selective visual display system

Display driving control circuitry

Physically integral with display elements

345185, G09G 500

Patent

active

055505660

ABSTRACT:
An expansion card for a personal computer digitizes, optionally processes and/or compresses, stores, and then relays to the personal computer video information without the use of a frame store memory. An analog-to-digital converter on the expansion card digitizes at least part of a frame of an analog video signal received on a video connector of the expansion card. After optional processing and/or compressing of the digitized video information of the frame, part of the digitized video information is stored into a relatively small memory on the expansion card. Once stored, the digitized video information is transferred from the memory and to the personal computer over a parallel bus of the personal computer. Another part of the digitized video information of the frame is then stored into the same memory on the expansion card for subsequent transfer to the personal computer over the parallel bus. The memory provided on the video capture expansion card therefore has a smaller storage capacity than would be necessary otherwise if all the digitized video information of the frame which is to be stored were held at one time stored in a frame store memory.

REFERENCES:
patent: 4153896 (1979-05-01), White
patent: 4956705 (1990-09-01), Wright
patent: 4992782 (1991-02-01), Sakamoto et al.
patent: 4996598 (1991-02-01), Hara
patent: 5241631 (1993-08-01), Smith et al.
patent: 5266805 (1993-11-01), Edgar
patent: 5404445 (1995-04-01), Matsumoto

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