Method and apparatus for adaptive bit rate control in an asynchronized encoding system
AssigneeScientific-Atlanta, Inc.
InventorsMichael L. Olson, Si Jun Huang
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Abstract
Techniques for determining an output rate for a bit stream, the output rate being determined by applying information read from the bit stream to available bandwidths. A digital flywheel provides continuous feedback from an encoding system to a video compression engine in order to assure that the clock rates between the two remain appropriately synchronized.
Claims10
A method for controlling the output bit rate of a coded bit stream in an asynchronized encoding system, the asynchronized encoding system comprising a video compression engine having a first clock and outputting a bit stream at a first rate, and a video encoder having a second clock and outputting a bit stream at a second rate, said method comprising the steps of:
- parsing the bit stream output from the video compression engine to identify at least a first and second time parameter in said bit stream;
- determining a bit error deviation for each frame of video output by said video encoding system, said bit error deviation calculated from said first and second time parameters;
- and
- modulating the output of the video compression engine based upon the bit error deviation.
Dependencies are inferred from the claim text.