Television – Bandwidth reduction system
Patent
1994-11-25
1995-09-26
Chin, Tommy P.
Television
Bandwidth reduction system
348403, H04N 712, H04N 730
Patent
active
054537860
ABSTRACT:
A method of processing digital image data such as obtained from a television screen for transmission along telephone lines such that the transmitted data can be transformed to produce images in color. The method includes storing a frame of incoming digital image data in a frame buffer, transferring a group of tiles from the frame buffer to a tile buffer, generating a clock signal, generating address and sets of control signals in a state machine, applying the clock signal to a digital transformer and applying each address and set of control signals to the tile buffer to directly transfer a block of data in the tile buffer to the digital transformer. Next the data in the block is transformed, returned to the tile buffer and is written over the corresponding untransformed data in the tile buffer. These steps are repeated until all tiles in the tile block have been transformed and returned. The transformed tiles in the tile block are then coded so as to complete their compression. The compression steps are repeated until all tiles in the frame buffer are compressed.
REFERENCES:
patent: 4772956 (1988-09-01), Roche et al.
patent: 4774587 (1988-09-01), Schmitt
patent: 4951139 (1990-08-01), Hamilton et al.
patent: 4982283 (1991-01-01), Acampara
patent: 5005076 (1991-04-01), Stoppine et al.
patent: 5079621 (1992-01-01), Daly et al.
Chin Tommy P.
Le Vu
MPR Teltech Ltd.
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