Method and a device for transmission of a variable bit-rate compressed video bitstream over constant and variable capacity networks
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United States of America Patent
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Mar 4, 2003
Grant Date -
N/A
app pub date -
Feb 15, 2000
filing date -
Feb 16, 1999
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Abstract
A method and device for producing and delivering constant quality digital video bitstreams over channels of any bit-rate and variability are provided. The method and device may be applicable to any standardized video coding system, but preferably within the MPEG-4 standard. For constant capacity networks, the method and the device re-distribute the coded bits in a constant-quality variable bit-rate bitstream to construct a constant bit-rate bitstream. For variable capacity networks, the method and the device achieve constant quality as described by a metric that incorporate both spatial and temporal visual quality. The method and the device incorporate user, network, and channel parameters in controlling the bit-rate while encoding video material.
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