Patent ID: 7379466
Filing Date: 2008-05-27
Classification: H04J,H04L

Abstract:
1. A jitter buffer system for reducing jitter in a packet audio reception device, the jitter buffer system comprising: a jitter buffer for storing plurality of audio frames and providing each of the plurality of audio frames to a decompression circuit upon receipt of a signal therefore; a delay calculation module for receiving each of the plurality of audio frames, and for each of the plurality of audio frames: a output time stamp index for determining an initial value of the output time stamp value following receipt of a jitter buffer latency value and incrementing the output time stamp value upon each release of a frame from the jitter buffer to the decompression circuit, the initial value being equal to the sum of the transmission time stamp assigned to the first frame and the jitter buffer latency value, each incremental output time stamp being an incremental time period added to the output time stamp value; a histogram module coupled to each of the output time stamp index and the delay calculation module, the histogram module for periodically calculating a target delay value which, based on a buffered history of values representing the delay value of each of a fixed quantity of the most recently received frames from the sequence of receive frames, would have resulted in a predetermined portion of the fixed quantity of frames being dropped, adjusting the jitter buffer latency value to a value equal to the target value, and providing the jitter buffer latency value to the output time stamp index.