Adaptive PID controller for audio/video clock recovery

摘要

Systems, devices and methods are described including specifying a jitter response control parameter, receiving multiple timestamp pairs. A maximum jitter of the timestamp pairs may be determined along with an elapsed time, and a clock frequency may be adjusted if the maximum jitter is less than the elapsed time divided by the jitter response control parameter. The jitter response control parameter may be adjusted in response to changes in die jitter of the input A/V signal. Further, one or more Proportional-Integral-Derivative (PID) controller coefficients may be adjusted in response to the evaluated jitter of the timestamp pairs.

主权项

1. A computer-implemented method, comprising:
specifying a jitter response control parameter; receiving a plurality of timestamp pairs; determining a maximum jitter of the plurality of timestamp pairs; determining an elapsed time; and adjusting at least one of a clock frequency if the maximum jitter is less than the elapsed time divided by the jitter response control parameter or a Proportional-Integral-Derivative (PID) controller coefficient.