Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Reexamination Certificate
2008-07-19
2011-12-13
Cho, Hong (Department: 2467)
Pulse or digital communications
Bandwidth reduction or expansion
Television or motion video signal
C375S240260
Reexamination Certificate
active
08077773
ABSTRACT:
Systems and methods are presented for compressing digital video signals in a manner that prevents the creation of block artifacts and improves compression efficiency by the selective removal of data representing visually imperceptible or irrelevant detail. Bandwidth control is improved through prioritized removal of data exceeding permissible bandwidth limits. This provides a process by which a coupled compressor and de-compressor system can effect the transmission or storage of video at low bitrates with high perceptual quality of the decompressed video. In one embodiment, the low frequency components are removed from a video stream and either stored or transmitted in compressed format separate from the storage or transmission of the high frequency components of the video stream. Certain high frequency video stream details can be suppressed to further reduce bitrate.
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Bruton Leonard Thomas
Lancaster Greg
Lowe Danny D.
Sherwood Matt
Cho Hong
Fulbright & Jaworski L.L.P.
Worldplay (Barbados) Inc.
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