Safety margin to ensure that the begin-of-speech is captured.
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Value |
Positive integer |
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Default |
200 (milliseconds) |
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How to set |
Shown in precedence order (see Rules of parameter precedence): Set in the browser (MRCPv2 only), using the Vendor-Specific-Parameters header in a RECOGNIZE or SET-PARAMS request. In Management Station set on the Nuance recognition service. If not using Management Station, set in a Recognizer configuration file (User-nrsxx.xml). |
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Usage |
Seldom used. |
This parameter specifies the number of milliseconds of prespeech silence to include before sending the utterance to Recognizer. The speech detector uses the margin to extend the begin-of-speech (BOS) marker slightly later (after the computed value) in the audio sample.
Browsers usually set this parameter in a RECOGNIZE request, and the parameter automatically reverts to the previous value after the recognition event. (Alternatively, browsers can use the SET-PARAMS method. See Configuring Recognizer with the browser.)
Vendor-Specific-Parameters: swiep_BOS_backoff=220
Related parameter
