Digital audio frame and block synchonization

Details Digital audio frame and block synchonization Digital audio frame and block synchonization

1997-06-13

1999-01-12

Ton, My-Trang Nu

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

327156, H03L 706

Patent

active

058595490

ABSTRACT:
A digital audio frame and block synchronization signal is generated from a reference clock having a nominal 50% duty cycle except that one out of every N cycles has a different duty cycle, where N corresponds to a block span of ancillary data within the frame samples of the digital audio. A phase locked loop includes a loop counter that provides a sample clock synchronized with the reference clock. A block counter subdivides the sample clock by N to produce a block clock. A logic circuit has the reference clock and a current count from the loop counter as inputs, and detects when the Nth non-50% duty cycle occurs to generate a reset signal. The reset signal is used to reset the block counter so that the block clock is synchronized with the reference clock.

REFERENCES:
patent: 5012198 (1991-04-01), Okada et al.
patent: 5170135 (1992-12-01), Ito et al.
patent: 5455840 (1995-10-01), Nakauchi et al.
patent: 5694089 (1997-12-01), Adachi et al.

Affiliated with

Also associated with

Rating

Digital audio frame and block synchonization does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Digital audio frame and block synchonization, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital audio frame and block synchonization will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1519969