Television – Bandwidth reduction system – Data rate reduction
Patent
1996-10-28
1999-12-14
Le, Vu
Television
Bandwidth reduction system
Data rate reduction
348384, 348390, H04N 732
Patent
active
060024410
ABSTRACT:
A novel method and apparatus for decoding a compressed audio/video signal to produce decoded audio and decoded video signals. The decoding tasks are partitioned into "pre-processing tasks" and "post-processing tasks." Pre-processing tasks involve one or more non-signal processing oriented operations which do not require extensive computing resources. Pre-processing tasks are assigned to be executed by the host processor, which can perform these tasks without straining it computational resources. Pre-processing tasks include demultiplexing the compressed audio/video stream into compressed audio and compressed video streams, performing audio pre-processing on the compressed audio stream and performing video pre-processing on the compressed video stream. Post-processing tasks involve one or more signal processing oriented operations which require extensive computing resources. Pre-processing tasks are assigned to be executed by a dedicated subprocessor. Post-processing tasks include audio post-processing and video post-processing. In an embodiment, video frame tasks are also performed as part of video post-processing. Post-processing performed by the dedicated subprocessor outputs a decoded audio signal and a decoded video signal.
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Arbel Ygal
Bheda Hemant
Srinivasan Partha
Caserza Steven F.
Le Vu
National Semiconductor Corporation
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