Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Reexamination Certificate
2011-01-25
2011-01-25
Poon, King Y (Department: 2625)
Pulse or digital communications
Bandwidth reduction or expansion
Television or motion video signal
C375S240010
Reexamination Certificate
active
07876819
ABSTRACT:
This disclosure describes rate control techniques that can improve video coding based on a “two-pass” approach. The first pass codes a video sequence using a first set of quantization parameters (QPs) for the purpose of estimating rate-distortion characteristics of the video sequence based on the statistics of the first pass. A second set of QPs can then be defined for a second coding pass. The estimated rate-distortion characteristics of the first pass are used to select QPs for the second pass in a manner that minimizes distortion of the frames of the video sequence.
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Malayath Narendranath
Wang Haohong
Loomis Timothy F.
Poon King Y
Qualcomm Incorporated
Rickenbrode John G.
Rodriguez Lennin R
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