The behavior of SpeechRecognitionResult.Status = Unknown of Windows.Media.SpeechRecognition has changed.

山下大輔 1

Hello.
Using the speech recognition API (Windows.Media.SpeechRecognition)
I'm creating a WPF app.

〇 What happened:
Windows.Media.SpeechRecognition API on January 17, 2022
Used to perform speech recognition.
SpeechRecognitionResult.Status ＝ Unknown no matter how many times you try
And it stopped working normally.

It was working fine until January 15, 2022.

〇 Execution content:

recognitionOperation = recognizer.RecognizeAsync ();
SpeechRecognitionResult recognitionResult = await recognitionOperation;

(In normal, SpeechRecognitionResult.Status is returned as Success)

〇Environmental information:

Microsoft.Windows.SDK.Contracts (10.0.19041.1)
WPF
.NET Core 3.1
Self-contained application issuance

〇 Supplement:
As of 1/18 9:00, voice recognition processing was being performed.

Do you have the following knowledge?
・ Reason why voice recognition processing is no longer performed
・ How to detect the situation
・ How to deal with the situation

Thank you.

Hui Liu-MSFT 47,341 Reputation points Microsoft Vendor

2022-01-21T01:43:47.287+00:00

Hi,@山下大輔 . How do you use the Windows.Media.SpeechRecognition API in your wpf project? Could you show me your complete code or project link to reproduce the problem and analyze it?

山下大輔 1

recognitionOperation = recognizer.RecognizeAsync();
SpeechRecognitionResult recognitionResult = await recognitionOperation;

RecognitionResult.Status is unknown.

/// <summary>
/// 仮説文字列の生成通知
/// </summary>
/// <param name="sender">音声認識API</param>
/// <param name="args">通知パラメータ</param>
private void SpeechRecognizer_HypothesisGenerated(SpeechRecognizer sender, SpeechRecognitionHypothesisGeneratedEventArgs args)
{
    if (MyState == MyRecognizerState.Listening)
    {
        ResetTimer(responseTimer);

        hypothesisText = args.Hypothesis.Text;
        Callbacks?.cbHypothesisGenerated?.Invoke(hypothesisText);
    }
}

HypothesisText = args.Hypothesis.Text;
The behavior that the character string could not be obtained was also incorrect.

Thank you.

Hui Liu-MSFT 47,341 Reputation points Microsoft Vendor

2022-01-24T03:19:36.223+00:00

Hi,@山下大輔 . What changes did you make on the 15th? Which updates were installed on the 15th?
山下大輔 1 Reputation point

2022-01-24T03:26:08.043+00:00

thank you for your reply.
No special program code editing has been added.
It means that the same program code behaves differently.
Hui Liu-MSFT 47,341 Reputation points Microsoft Vendor

2022-01-24T03:32:02.067+00:00

Hi,@山下大輔 . Did you install any updates on the 15th? Which updates were installed on the 15th?
山下大輔 1 Reputation point

2022-01-24T03:47:12.69+00:00

No, I haven't installed the update.
Where is the updater?

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The behavior of SpeechRecognitionResult.Status = Unknown of Windows.Media.SpeechRecognition has changed.