Method for controlling a digital television metrology equipment
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United States of America Patent
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Sep 9, 2003
Grant Date -
N/A
app pub date -
May 22, 2000
filing date -
Dec 17, 1997
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The invention relates to a method of controlling equipment for monitoring the quality of digital television signals comprising a data stream organized into frames. It comprises the following steps: a) selecting a reference time signal (PCR) in the data stream; b) on the basis of the reference time signal (PCR), generating a multibit digital clock signal (MTS) whose phase is servo-controlled from said reference time signal (PCR) and whose count is deduced unambiguously from the count of a time base (STC) generated during initial encoding of the digital television signals; and c) transmitting at least meaningful bits of the digital clock signal (MTS) to the measurement equipment synchronously with an analog video frame synchronizing signal (STV) as decoded from the data stream so as to generate a measurement triggering signal (MSTC).
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