Dynamic bit allocation for statistical multiplexing of compresse

Details Dynamic bit allocation for statistical multiplexing of compresse Dynamic bit allocation for statistical multiplexing of compresse

1998-08-27

2000-12-26

Britton, Howard

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

H04N 758

Patent

active

061670847

ABSTRACT:
The present invention relates to a method and apparatus for allocating bits in a statistical multiplexing system (stat mux). A statistical multiplexer (stat mux) accommodates both compressed and uncompressed video programs using transcoding and encoding, respectively. Hierarchical dynamic bit allocation is used, starting from a super GOP level, then to a super frame level, and then to the regular (individual) frame level. At each level, a target number of bits is determined. A target number of bits for a super frame, which is a collection of frames across all channels at a given frame instance, is adaptive and is able to address any combination of picture types. Frames of the same picture type for a program are generally assigned the same (or similar) number of bits. Relative program quality can be controlled using a program priority weighting factor. Additionally, constraints on target bit rates and minimum and maximum bit rates are provided.

REFERENCES:
patent: 5216503 (1993-06-01), Paik et al.
patent: 5617142 (1997-04-01), Hamilton
patent: 5805220 (1998-09-01), Keesman
patent: 6038256 (2000-03-01), Linzer
L. Wang and A. Vincent, "Bit Allocation for Joint Coding of Multiple Video Programs," SPIE Visual Communications and Image Processing, pp. 149-158, Feb. 1997.
L. Wang and A. Vincent, "Joint Rate Control for Multi-Program Video Coding," IEEE Transactions on Consumer Electronics, vol. 42, No. 3, pp. 300-305, Aug. 1996.

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