Using Concept/Phrase Grammars

These functions allow the ActiveX application to implement Phrase pair grammars. These grammars are less powerful than SRGS grammars, but are easier to create.

• Public Sub AddConceptToGrammar(Concept As String, Phrase As String)
• Public Function GetRawConceptCount() As Long
• Public Function GetRawConcept(Index As Long, ByRef ConfidenceScore As Long) As String
• Public Function IsCustomConcept(Concept As String) As Boolean
• Public Function GetPhrase(Index As Long) As String
• Public Sub SetAllowedNumberOfRecognitionReturns(FromCount As Long, ToCount As Long)

Syntax

• LVCA.AddConceptToGrammar(Concept, Phrase)
• Count = LVCA.GetRawConceptCount
• RetConcept = LVCA.GetRawConcept( Index, ConfScore )
• Custom = LVCA.IsCustomConcept(Concept)
• Phrase = LVCA.GetPhrase(Index)
• LVCA.SetAllowedNumberOfRecognitionReturns From, To

Arguments

• Concept - String - Key identifier of phrases which all have the same effect in the application
• Phrase - String - The actual utterance to be recognized.
• Index - Long - The utterance order/position of the concept recognized.
• ConfScore - Long(out) - This will contain the confidence score of the concept
• From - Long - lower bound of how many concepts will be recognized
• To - Long - upper bound of how many concepts will be recognized.

Returns

• Count - Long - The number of concepts which were recognized in the utterance.
• RetConcept - String - This is the concept found at position identified by Index.
• Custom - Boolean - Was this concept added through the ActiveX application.
• Phrase - String - The actual phrase identified at position Index

Appropriate Events

• Enter Module
  • AddConceptToGrammar
  • SetAllowedNumberOfRecognitionReturns
• After Decode
  • All others

Remarks

Concept/phrase pairs are unstructured. As a result there is no control in the order of appearance. If there are two concepts in a grammar "Yes" and "No", The caller could say "Yes .. NO", The recognizer will return back 2 concepts the first being Yes and the Second would be no. The number of concepts can be controlled by the SetAllowedNumberOf RecognitionReturns method. If From was set to 1 and To was set to 1 then only "Yes" would be returned in this example.