Rate control for content transcoding
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United States of America Patent
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Jan 2, 2018
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N/A
app pub date -
May 19, 2017
filing date -
Apr 11, 2012
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Abstract
The disclosed subject matter relates to rate control aspects for content transcoding. A rate control scheme for transcoding is disclosed that is considerate of quantization parameters related to an encoded input content stream and when transcoding the input content stream into an output content stream. Quantization parameters can be determined for an encoded input content stream by parsing the stream. These can be combined with a rate-distortion model for transcoding to determine transcoding quantization parameters. Further, iteratively applying the derived rate-distortion model to windows of frames during transcoding can facilitate real-time two-pass transcoding. Window size can be based on buffer constraints. Moreover, a sliding window buffer check scheme can be employed to avoid buffer constraint violations.
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