- How to Set Up Speech Recognition in Windows 10 Windows Speech Recognition lets you control your PC with your voice alone, without needing a keyboard or mouse. Using only your voice, you can open menus, click buttons and other objects on the screen, dictate text into documents, and write and send emails.
- How to use Speech Recognition on Windows 10 Starting Speech Recognition. To launch the experience, just open the Start menu. Turning on and off. To start using the feature, click the microphone button or say Start listening. Using commands. Open — Launches an app when saying 'Open' followed.
Windows Speech Recognition. Microsoft’s inbuilt speech recognition feature is possibly the safest bet and is also one of the most interesting ones. The app is not only available in six languages, including Mandarin and Spanish, it can also multitask like a total pro.
-->Use speech recognition to provide input, specify an action or command, and accomplish tasks.
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Important APIs: Windows.Media.SpeechRecognition
Speech recognition is made up of a speech runtime, recognition APIs for programming the runtime, ready-to-use grammars for dictation and web search, and a default system UI that helps users discover and use speech recognition features.
Configure speech recognition
To support speech recognition with your app, the user must connect and enable a microphone on their device, and accept the Microsoft Privacy Policy granting permission for your app to use it.
Hack wifi android app. To automatically prompt the user with a system dialog requesting permission to access and use the microphone's audio feed (example from the Speech recognition and speech synthesis sample shown below), just set the Microphonedevice capability in the App package manifest. For more detail, see App capability declarations.
If the user clicks Yes to grant access to the microphone, your app is added to the list of approved applications on the Settings -> Privacy -> Microphone page. However, as the user can choose to turn this setting off at any time, you should confirm that your app has access to the microphone before attempting to use it.
If you also want to support dictation, Cortana, or other speech recognition services (such as a predefined grammar defined in a topic constraint), you must also confirm that Online speech recognition (Settings -> Privacy -> Speech) is enabled.
This snippet shows how your app can check if a microphone is present and if it has permission to use it.
Recognize speech input
A constraint defines the words and phrases (vocabulary) that an app recognizes in speech input. Constraints are at the core of speech recognition and give your app greater over the accuracy of speech recognition.
You can use the following types of constraints for recognizing speech input.
Predefined grammars
Predefined dictation and web-search grammars provide speech recognition for your app without requiring you to author a grammar. When using these grammars, speech recognition is performed by a remote web service and the results are returned to the device.
The default free-text dictation grammar can recognize most words and phrases that a user can say in a particular language, and is optimized to recognize short phrases. The predefined dictation grammar is used if you don't specify any constraints for your SpeechRecognizer object. Free-text dictation is useful when you don't want to limit the kinds of things a user can say. Typical uses include creating notes or dictating the content for a message.
The web-search grammar, like a dictation grammar, contains a large number of words and phrases that a user might say. However, it is optimized to recognize terms that people typically use when searching the web.
Note Because predefined dictation and web-search grammars can be large, and because they are online (not on the device), performance might not be as fast as with a custom grammar installed on the device.
These predefined grammars can be used to recognize up to 10 seconds of speech input and require no authoring effort on your part. However, they do require a connection to a network.
To use web-service constraints, speech input and dictation support must be enabled in Settings by turning on the 'Get to know me' option in Settings -> Privacy -> Speech, inking, and typing.
Here, we show how to test whether speech input is enabled and open the Settings -> Privacy -> Speech, inking, and typing page, if not.
First, we initialize a global variable (HResultPrivacyStatementDeclined) to the HResult value of 0x80045509. See Exception handling for in C# or Visual Basic.
We then catch any standard exceptions during recogntion and test if the HResult value is equal to the value of the HResultPrivacyStatementDeclined variable. If so, we display a warning and call
await Windows.System.Launcher.LaunchUriAsync(new Uri('ms-settings:privacy-accounts'));
to open the Settings page.See SpeechRecognitionTopicConstraint.
Programmatic list constraints
Programmatic list constraints provide a lightweight approach to creating simple grammars using a list of words or phrases. A list constraint works well for recognizing short, distinct phrases. Explicitly specifying all words in a grammar also improves recognition accuracy, as the speech recognition engine must only process speech to confirm a match. The list can also be programmatically updated.
A list constraint consists of an array of strings that represents speech input that your app will accept for a recognition operation. You can create a list constraint in your app by creating a speech-recognition list-constraint object and passing an array of strings. Then, add that object to the constraints collection of the recognizer. Recognition is successful when the speech recognizer recognizes any one of the strings in the array.
See SpeechRecognitionListConstraint.
SRGS grammars
![Speech Speech](/uploads/1/2/4/9/124900297/698715469.png)
An Speech Recognition Grammar Specification (SRGS) grammar is a static document that, unlike a programmatic list constraint, uses the XML format defined by the SRGS Version 1.0. An SRGS grammar provides the greatest control over the speech recognition experience by letting you capture multiple semantic meanings in a single recognition.
See SpeechRecognitionGrammarFileConstraint.
Voice command constraints
Use a Voice Command Definition (VCD) XML file to define the commands that the user can say to initiate actions when activating your app. For more detail, see Activate a foreground app with voice commands through Cortana.
See SpeechRecognitionVoiceCommandDefinitionConstraint/
Note The type of constraint type you use depends on the complexity of the recognition experience you want to create. Any could be the best choice for a specific recognition task, and you might find uses for all types of constraints in your app.To get started with constraints, see Define custom recognition constraints.
The predefined Universal Windows app dictation grammar recognizes most words and short phrases in a language. It is activated by default when a speech recognizer object is instantiated without custom constraints.
In this example, we show how to:
- Create a speech recognizer.
- Compile the default Universal Windows app constraints (no grammars have been added to the speech recognizer's grammar set).
- Start listening for speech by using the basic recognition UI and TTS feedback provided by the RecognizeWithUIAsync method. Use the RecognizeAsync method if the default UI is not required.
Customize the recognition UI
When your app attempts speech recognition by calling SpeechRecognizer.RecognizeWithUIAsync, several screens are shown in the following order.
If you're using a constraint based on a predefined grammar (dictation or web search):
- The Listening screen.
- The Thinking screen.
- The Heard you say screen or the error screen.
If you're using a constraint based on a list of words or phrases, or a constraint based on a SRGS grammar file:
- The Listening screen.
- The Did you say screen, if what the user said could be interpreted as more than one potential result.
- The Heard you say screen or the error screen.
Speech Recognition Apps For Windows 10
The following image shows an example of the flow between screens for a speech recognizer that uses a constraint based on a SRGS grammar file. In this example, speech recognition was successful.
The Listening screen can provide examples of words or phrases that the app can recognize. Here, we show how to use the properties of the SpeechRecognizerUIOptions class (obtained by calling the SpeechRecognizer.UIOptions property) to customize content on the Listening screen.
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