Method and device for sychronizing visual information with audio

Details Method and device for sychronizing visual information with audio Method and device for sychronizing visual information with audio

1996-06-07

1999-03-30

Kostak, Victor R.

Television

Synchronization

Locking of video or audio to reference timebase

370503, H04M 9475

Patent

active

058895639

ABSTRACT:
A method and device for synchronizing visual information encoded in accordance with the MPEG standard, when it is being decoded. A counter of the number of words transmitted to the picture decoder input is read at the time of the arrival of a picture time mark, and its value is stored in a stack in a microcontroller. When it is output from the picture decoder, each start code stops the microcontroller. At the same time a counter of the number of words transmitted from the picture decoder output is read and its value is compared with the value in the stack. When its value exceeds one of the counter values in the stack, the value of the corresponding time mark is assigned to it and can be used for synchronization with the audio signal.

REFERENCES:
patent: 3971888 (1976-07-01), Ching et al.
patent: 4660079 (1987-04-01), Devimeux et al.
patent: 5559999 (1996-09-01), Maturi et al.
1992 SID International Symposium, May 17, 1992, Boston, MS, pp. 127-129 Maccinnis, "The MPEG System Specification: Multiplex, Coding and Constraints".

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