Long lived audio streams, such as music broadcasts, and small

differences in clock rates lead to buffer underflow or overflow

events in receiving applications that manifest themselves as audible

interruptions. We present a low complexity algorithm for

detecting clock skew in network audio applications that function

with local clocks and in the absence of a synchronization mechanism.

A companion algorithm to perform skew compensation is

also presented. The compensation algorithm utilises the temporal

redundancy inherent in audio streams to make inaudible playout

adjustments. Both algorithms have been implemented in a simulator

and in a network audio application. They perform effectively

over the range of observed clock rate differences and beyond.

PDF file

In  Proceedings of the IEEE International Conference on Multimedia and Expo

Publisher  IEEE Computer Society
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