Robust multi-pass variable bit rate encoding

Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal

Reexamination Certificate

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Reexamination Certificate

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10751345

ABSTRACT:
An encoding manager performs a first-pass encoding of a video sequence, collecting modeling data concerning the sequence in the process. The encoding manager utilizes collected data to construct a model concerning the sequence, the model including bit overhead for each frame and data concerning transitions that occur during the sequence. The encoding manager uses the data model to generate a rate profile for the video sequence, avoiding buffer underflow by allocating bits from hard to easy segments as needed. The encoding manager utilizes the rate profile to perform a second-pass encoding of the video sequence, adjusting quantization and bit rate for frames as necessary to avoid underflow and conform to the bit budget for the video sequence.

REFERENCES:
patent: 6198878 (2001-03-01), Blawat et al.
patent: 2005/0058200 (2005-03-01), Lu et al.

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