Rate control for parallel video encoding
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United States of America Patent
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Oct 9, 2018
Grant Date -
Jun 16, 2016
app pub date -
Dec 11, 2014
filing date -
Dec 11, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
Systems and methods for determining a target number of bits (target bitrate) for encoding a frame of video that will satisfy a buffer constraint in a parallel video encoder. The quantization parameter (QP) for a given encoding process may be determined for the frame based on the target bitrate to maintain a suitable average bitrate. In some embodiments, the bitrate used for one or more prior frame is estimated. In some embodiments, a buffer fullness update is made based on an estimated bitrate. In some embodiments, a bitrate to target for each frame is determined based on the frame type, estimated bitrate of a prior frame(s), and the updated buffer fullness.
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