Patent Number: 6,167,084

Title: Dynamic bit allocation for statistical multiplexing of compressed and uncompressed digital video signals

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.

Inventors: Wang; Limin (San Diego, CA), Luthra; Ajay (San Diego, CA)

Assignee: Motorola, Inc.

International Classification: H04N 7/58 (20060101); H04N 7/52 (20060101); H04N 7/50 (20060101); H04N 007/58 ()

Expiration Date: 12/26/2017