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System.Speech.Recognition (Espacio de nombres)

The System.Speech.Recognition namespace contains Windows Desktop Speech technology types for implementing speech recognition.

The Windows Desktop Speech Technology software offers a basic speech recognition infrastructure that digitizes acoustical signals, and recovers words and speech elements from audio input.

Applications use System.Speech.Recognition namespace to access extend this basic speech recognition technology, by defining algorithms for identifying and acting on specific phrases or word patterns, and by managing the run time behavior of this speech infrastructure.

Applications manage and obtain use grammars -- sets of rules defining how specific combinations of words and phrases are to be understood --through the general purpose System.Speech.Recognition.Grammar class, which hosts runtime, persisted, or dynamically constructed instances of System.Speech.Recognition.SrgsGrammar.SrgsDocument. SrgsDocument instances contain W3C Speech Recognition Grammar Specification (SRGS) compliant grammar documents.

A simplified means of specifying grammar documents is provided through the System.Speech.Recognition.GrammarBuilder and System.Speech.Recognition.Choices classes. While full support for generating SRGS compliant grammars is provided by the members of the System.Speech.Recognition.SrgsGrammar name space.

In addition, a special case grammar to support a conventional dictation model is available through System.Speech.Recognition.DictationGrammar objects .

Instances of System.Speech.Recognition.SpeechRecognizer and System.Speech.Recognition.SpeechRecognitionEngine objects supplied with appropriate Grammar objects provide the primary access to the Windows Desktop Speech Technology recognition engines.

The SpeechRecognizer class is used to create client applications making use of a system's current recognition technology, which is configured through the Audio Input member of the Control Panel, and a computers default audio input mechanism.

Building and application using SpeechRecognitionEngine allows for more control on the configuration and type of recognition engine, which runs in process. Using SpeechRecognitionEngine also provides for the dynamic selection of audio input, whether from devices or files.

 ClaseDescripción
Clase públicaAudioLevelUpdatedEventArgs 
Clase públicaAudioSignalProblemOccurredEventArgs 
Clase públicaAudioStateChangedEventArgs 
Clase públicaChoicesRepresents a list of alternative items to make up an element in a grammar.
Clase públicaDictationGrammarProvides access to the system provided grammar used for free text dictation.
Clase públicaEmulateRecognizeCompletedEventArgsClass passed to handlers of events generated as upon completion of an asynchronous emulation of speech recognition.
Clase públicaGrammarProvides run time support for obtaining and managing grammar information.
Clase públicaGrammarBuilderProvides an easy to use mechanism for constructing complicated Grammar from simple inputs.
Clase públicaLoadGrammarCompletedEventArgsClass passed to handlers of events generated when a new grammar is asynchronously loaded into a recognition engine.
Clase públicaRecognitionEventArgsBase class for event arguments objects passed to handlers of the speech recognition events.
Clase públicaRecognitionResultRepresents the result of recognition engine on audio input as detailed information about the best candidate phrases matching phrase, and a list of all candidate matching phrases.
Clase públicaRecognizeCompletedEventArgsPasses information to handlers of the p
Clase públicaRecognizedAudioRepresents audio input a recognition engine used to generate candidate phrases result.
Clase públicaRecognizedPhraseRepresents detailed information about a candidate phrase found by a recognition engine as matching audio input.
Clase públicaRecognizedWordUnitProvides the atomic unit of recognized speech.
Clase públicaRecognizerInfoEncapsulates identifying information about a recognition engine (SpeechRecognizer or SpeechRecognitionEngine).
Clase públicaRecognizerUpdateReachedEventArgsClass passed to handlers of recognition engine update events.
Clase públicaReplacementTextContains originally recognized text replace using speech normalization by a recognition engine.
Clase públicaSemanticResultKeyAttaches key string to SemanticResultValue values to define the SemanticValue objects created in Grammar using GrammarBuilder instances
Clase públicaSemanticResultValueSets values to SemanticValue objects created in Grammar using GrammarBuilder instances.
Clase públicaSemanticValueRepresents the semantic organization of a recognized phrase.
Clase públicaSpeechDetectedEventArgsClass passed to handlers of events generated by recognition engines upon detection of human speech in an audio input.
Clase públicaSpeechHypothesizedEventArgsClass passed as an event argument to handlers generated as a speech recognition engine develops tentative recognition results for an input phrase.
Clase públicaSpeechRecognitionEngineProvides access to run any properly installed speech recognition services found on a Windows Desktop system.
Clase públicaSpeechRecognitionRejectedEventArgsClass passed to handlers of events generated as when a speech recognition engine fails to identify a phrase from input.
Clase públicaSpeechRecognizedEventArgsClass passed to handlers of events generated as upon phrase recognition by a recognition engine.
Clase públicaSpeechRecognizerProvides access to the default shared speech recognition service available on the Windows Desktop.
Clase públicaSpeechUIProvides text and status information to the operating system in speech user interface to display to the user.
Clase públicaStateChangedEventArgsClass passed to handlers of events generated when a recognition engine state changes.

 EnumeraciónDescripción
Enumeración públicaAudioSignalProblemEnumeration used to indicate the problem state of audio signals received by a recognition engine.
Enumeración públicaAudioStateEnumeration describing current state of the audio input a recognition engine has detected.
Enumeración públicaDisplayAttributesDescribes formatting for printed output of words of a recognized phrase.
Enumeración públicaRecognizeModeSpecifies if asynchronous SpeechRecognitionEngine recognition is to terminate or continue following a recognition operation.
Enumeración públicaRecognizerStateDescribes the current state of a desktop speech recognition engine.
Enumeración públicaSubsetMatchingModeDefines the method used to match audio input which may be a subset of the match string.

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