Computer graphics processing and selective visual display system – Display driving control circuitry – Physically integral with display elements
Patent
1992-10-22
1994-04-05
Weldon, Ulysses
Computer graphics processing and selective visual display system
Display driving control circuitry
Physically integral with display elements
382 56, G09G 106
Patent
active
053009495
ABSTRACT:
Decompression of video segments from a sequence of differential frames is done by selected scaling of frame resolution and color depth. A frame header indicates the computational complexity of decompression of a frame, allowing selection of scales for output resolution and color depth. Decompression proceeds by retrieving a frame from the compressed video stream in elementary units. An elementary unit is characterized by types, including an unchanged type, a homogeneous type, a pattern type and a predetermined pattern type. For a retrieved elementary unit of the unchanged type, an output pointer to a display buffer is moved by an elementary unit scaled by the output resolution scale. For a retrieved elementary unit of the homogeneous type, a color retrieved from the compressed video stream is applied to an area in the display buffer corresponding to an elementary unit scaled by the output resolution scale. For a retrieved elementary unit of the predetermined pattern type, a pattern from a table of patterns is retrieved using an index from the compressed video segment as an address. Two colors for the pattern are also retrieved and applied to the pattern.
REFERENCES:
patent: 4124871 (1978-11-01), Morrin, II
patent: 5046119 (1991-09-01), Hoffert et al.
patent: 5081450 (1992-01-01), Luca et al.
patent: 5119442 (1992-06-01), Brown
Hancock Steven M.
Kantner, Jr. Robert F.
Pietras Mark A.
Rodriquez Arturo A.
Rutherfoord Charles T.
Chow Doon
Dillon Andrew J.
International Business Machines - Corporation
O'Malley Paul W.
Weldon Ulysses
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