| 摘要 |
A method and system for updating clock references in a digital data stream is proposed, wherein all clock references present in the data stream are updated by means of a single system clock. A time recovery unit compares time tpcr transported in the clock reference (PCR) with the time of the system clock tclock and stamps the difference (tclock-tpcr) of the two times into the clock reference. After remultiplexing, a stamping unit reads out the time difference (tclock-tpcr) of the two times from the time stamp, subtracts it from the actual time in the system clock and stamps the value (tpcr+d) into the clock reference. Due to similarities in operation, the time recovery unit and stamping unit may share common circuitry.
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