Methods and apparatus for statistical multiplexing during...

Details Methods and apparatus for statistical multiplexing during... Methods and apparatus for statistical multiplexing during...

H - Electricity

04

N

H04N 7/50 (2006.01) H04J 3/04 (2006.01)

Patent

CA 2396308

Methods and apparatus for statistical multiplexing in a dual pass encoding scheme are provided. A first pass encoder encodes alternate slices of anchor frames as I- slices and P- slices respectively in order to generate statistics fox both I and P frame encoding for the same anchor frame. A second pass encoder determines the encoding complexity estimates for a plurality of frames in a look-ahead pipeline and sums the encoding complexity estimates of selective frames in the look-ahead pipeline to determine the initial need parameter for a current fi~ame to be encoded. The second pass encoder computes a need parameter for encoding the current frame based on the initial need parameter. The need parameter is used by a statmux processor to determine the encoding bit rate for second pass encoding of the current frame.

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