Television – Bandwidth reduction system – Data rate reduction
Patent
1992-11-13
1995-11-28
Britton, Howard W.
Television
Bandwidth reduction system
Data rate reduction
H04N 726
Patent
active
054712483
ABSTRACT:
A video image frame consisting of a two-dimensional array of picture elements (pixels) is decomposed into a set of rectangular image portions (tiles). Within each tile, variance between pixel intensity values is less than a predetermined value. A tile is encoded by a value set identifying the tile and including a single intensity value for all pixels in the tile. Frame-to-frame variation of the video image is encoded by inter-frame tile comparison and encoding of sub-tiles representative of change from a previous frame to a current frame.
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Gregory S. Yovanof, et al viewgraph presentation on "Lossless Coding Techniques For Color Graphical Images" DCC 91 Data Compression Conference, Apr. 8-10, 1991.
Bhargava Vivek
Jue Andrew
Van Scherrenburg Michael A.
Wilson Les J.
Britton Howard W.
Millers David T.
National Semiconductor Corporation
Nelson H. Donald
Robinson Stephen R.
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