Method and apparatus for measuring delay within a compressed digital stream

The present invention provides a method of measuring delay variation of digital audio video data stream of the first and second elementary streams, the method comprising the value of detecting and storing digital audiovisual data stream timestamp, testing and storage of the elementary stream timestamp values ​​of the first and second elementary stream of the digital audiovisual data stream timestamp values ​​and elementary stream timestamp values ​​interpolated to form a common set of data sampling points, and from the first two basic data stream by subtracting the first interpolated concentrated basic data stream to form interpolated data set indicating the delay between the first and second elementary stream changes with time of the difference between the basic flow.