Determination of speech latency across a telecommunication network element
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United States of America Patent
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Sep 1, 2009
Grant Date -
Jul 21, 2005
app pub date -
Jan 5, 2005
filing date -
Jan 21, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Determination of speech latency across a communication network element having an input interface and an output interface includes allocating a timestamp to the data packets of a sample of data packets representing a speech signal at the two interfaces, recording the timestamps together with the corresponding data packets, decoding the recorded data packets at both interfaces to generate respective envelopes in the time domain, cross-correlating the envelopes to determine correlating areas of the envelopes, and determining a value for the speech latency between the interfaces from the timestamps associated with correlating areas of the envelopes.
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