MPEG audio synchronization system using subframe skip and repeat

Details MPEG audio synchronization system using subframe skip and repeat MPEG audio synchronization system using subframe skip and repeat

1996-12-20

1999-05-18

Vo, Don N.

Pulse or digital communications

Synchronizers

Frequency or phase control using synchronizing signal

375368, 370509, H04L7/06

Patent

active

059057688

ABSTRACT:
A Motion Picture Experts Group (MPEG) video/audio data bitstream comprises frames of encoded audio data, each of which includes a plurality of integrally encoded subframes, which are decoded by an audio decoder for presentation. A synchronization unit controls the decoder to skip a subframe if a predetermined decoding time for the subframe is earlier than a current time, and to repeat the subframe if the predetermined decoding time is later than the current time. A typical MPEG audio frame includes 12 subframes, such that skipping or repeating a subframe is 1/12 as noticeable as skipping or repeating an entire frame. A buffer memory stores one or more subframes prior to decoding, such that the subframes can be skipped or repeated by manipulation of a read pointer for the memory.

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