Robust multi-pass variable bit rate encoding

Details Robust multi-pass variable bit rate encoding Robust multi-pass variable bit rate encoding

2008-03-18

2008-03-18

Vo, Tung (Department: 2621)

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

Reexamination Certificate

active

07346106

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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