Computer graphics processing and selective visual display system – Computer graphics processing – Graph generating
Patent
1994-11-04
1999-03-30
Tung, Bryan
Computer graphics processing and selective visual display system
Computer graphics processing
Graph generating
348404, 348419, 348384, 348387, 348390, H04N 718
Patent
active
058895612
ABSTRACT:
A method and apparatus for scaling the bitstream of a compressed video signal includes partial decoding hardware (38, 41) to permit excising of higher frequency AC DCT coefficients or re-quantizing quantized data with a coarser quantization factor. The scaling is performed on a block (macroblock) basis in a manner which linearly scales the amount of compressed data per block. An analyzer (40) generates a profile of cumulative partially decompressed data over a video frame, and bitstream scaling (42) is performed in a manner which insures that a profile of the scaled signal substantially comports with the profile of the original data.
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Kwok Wilson
Sun Huifang
Zdepski Joel Walter
Herrmann Eric P.
Kurdyla Ronald H.
RCA Thomson Licensing Corporation
Tripoli Joseph S.
Tung Bryan
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