Process and apparatus for performing wipes on compressed MPEG vi

Details Process and apparatus for performing wipes on compressed MPEG vi Process and apparatus for performing wipes on compressed MPEG vi

1997-12-19

2000-08-08

Le, Vu

Television

Bandwidth reduction system

Data rate reduction

348594, H04N 712, H04N 1102, H04N 1104

Patent

active

06100930&

ABSTRACT:
A method and apparatus for producing a wipe sequence on a display device from incoming compressed video bitstreams, accomplishes the wipe function processing entirely in the compressed domain of the compressed video bitstreams. The old and new video bitstreams or sequences separately undergo a 2-dimensional convolution between its decoded DCT coefficients and stored DCT coefficients of a particular known wipe function. Each convolved bitstream is buffered with its quantization scale and then summed with the other. The summed output bitstream is used by a multiplexer along with each bitstream's decoded macroblock data to provide a seamed output bitstream. A controller controls the process such as frame correlation for convolution and output multiplexing of the summed bitstreams.

REFERENCES:
patent: 4935815 (1990-06-01), Ichikawa et al.
patent: 5229855 (1993-07-01), Siann
patent: 5737021 (1998-04-01), Chun
patent: 5825433 (1998-10-01), Yamada et al.
patent: 5909539 (1999-05-01), Angell

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