METHOD AND APPARATUS FOR MEASURING DELAY VARIATION WITHIN DIGITAL STREAM

摘要

PROBLEM TO BE SOLVED: To measure a delay variation between first and second elementary streams in a digital audiovisual data stream.

SOLUTION: Digital audiovisual data stream time-stamp values are detected and stored, and elementary time-stamp values of the first and second elementary streams are detected and stored. The digital audiovisual data stream time-stamp values and elementary time-stamp values are interpolated to form data sets having mutual sampling points. The interpolated data set for the first elementary data stream is subtracted from the interpolated data set for the second elementary data stream to form elementary stream difference values indicative of a change in a delay accompanied by the lapse of a time between first and second elementary streams.

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