Methods and apparatuses for multi-pass adaptive quantization
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United States of America Patent
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Jul 16, 2019
Grant Date -
May 7, 2015
app pub date -
Nov 4, 2013
filing date -
Nov 4, 2013
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Abstract
A video encoding method for encoding a stream of baseband video data. The stream of baseband video data is received as a plurality of coding units. Statistics of each coding unit in the plurality of coding units are gathered. A quantization parameter (QP) for each coding unit is determined from the corresponding statistics. The coding unit is trial encoded using the QP to generate a trial encoded coding unit; and the QP is updated based on the trial encoded coding unit. Trial encoding the coding unit and updating the QP are repeated until the trial encoded coding unit meets a predetermined criterion. Then the coding unit is final encoded using the updated QP to generate a final encoded coding unit.
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