Patent ID: 7280156
Filing Date: 2007-10-09
Classification: H04N

Abstract:
1. A method for synchronizing the presentation of video frames and/or audio frames generated by processing a data stream comprising time stamps indicating instants of presentation of the frames, the method comprising the steps of: calculating a current value of deviation between the presentation instant indicated by a time stamp undergoing processing and a time indicated by a local reference clock during the processing of the time stamp; storing the current value of deviation in a register following values of deviation corresponding to previously processed time stamps; calculating a variance of an ordered set of deviation values stored in the register coming after a reference deviation value, the set of deviation values comprising at least the current value of deviation, and comparing the variance with a predetermined variance threshold; if the variance is greater than the variance threshold, selecting the current value of deviation as new value of reference deviation; and if the variance is less than the variance threshold, calculating an average of the deviation values of the set of deviation values and comparing the average with a determined average threshold, and