Patent ID: 7570304
Filing Date: 2009-08-04
Classification: H04N

Abstract:
1. A method of synchronizing a formatted presentation data stream to a clock, the method comprising: demultiplexing the formatted presentation data stream into a plurality of data streams; comparing a time stamp of one or more time stamps embedded in the formatted presentation data stream to time indicated by the clock to determine a relationship between a stamp time indicated by the time stamp and the time indicated by the clock, the time stamp corresponding to an external clock of a source providing the formatted presentation data stream, the clock being different from the external clock; adjusting a first data stream of the plurality of data streams to synchronize the first data stream to the clock, resulting in an adjusted first data stream; and synchronizing a second data stream to the plurality of data streams to the adjusted first data stream; wherein, when the step of comparing results in a determination that the time indicated by the clock leads by at least a predetermined amount the stamp time indicated by the time stamp, the step of adjusting comprises averaging one or more samples of the first data stream into an average value and inserting the average value into the first data stream one or more times.