Specifies the confidence threshold for recognition results computed while the magic_word mode is active.
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Value |
Integer: 0–999. DEFAULT: 500 |
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How to set |
Shown in precedence order (see Rules of parameter precedence): In a VoiceXML application, using the confidencelevel attribute of a <property> element. In the browser, using the Vendor-Specific-Parameters (MRCPv1)In the browser, using the Vendor-Specific-Parameters (MRCPv1) or Hotword-Confidence-Threshold (MRCPv2) header in a RECOGNIZE or SET-PARAMS method. In a parameter grammar. 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 |
Most applications do not require the magic word feature. But when the feature is needed, this parameter is frequently adjusted. This parameter requires that swirec_barge_in_mode is set to magic_word mode. |
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Performance |
Higher values ensure more accuracy at the cost of sometimes rejecting a valid magic word spoken by a caller. Lower values avoid the erroneous rejections at the cost of sometimes accepting invalid magic words. |
If the score for a magic_word recognition is less than the value of this parameter, the Recognizer rejects the audio sample, and continues computing subsequent samples.
For general information on confidence scores, see confidencelevel.
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: swirec_magic_word_conf_thresh=700
