问连续语音识别UWP

EN

    public sealed partial class MainPage : Page
{      public MainPage()
    {
        this.InitializeComponent();
    }

    //連続音声認識のためのオブジェクト
    private SpeechRecognizer contSpeechRecognizer;
    private CoreDispatcher dispatcher;


    protected async override void OnNavigatedTo(NavigationEventArgs e)
    {
        //ハックグラウンドスレッドからUIスレッドを呼び出すためのDispatcher
        dispatcher = CoreWindow.GetForCurrentThread().Dispatcher;

        //初期化
        contSpeechRecognizer =
            new Windows.Media.SpeechRecognition.SpeechRecognizer();
        await contSpeechRecognizer.CompileConstraintsAsync();

        //認識中の処理定義
        contSpeechRecognizer.HypothesisGenerated +=
            ContSpeechRecognizer_HypothesisGenerated;
        contSpeechRecognizer.ContinuousRecognitionSession.ResultGenerated +=
            ContinuousRecognitionSession_ResultGenerated;


        // 音声入力ないままタイムアウト(20秒位)した場合の処理
        contSpeechRecognizer.ContinuousRecognitionSession.Completed += ContinuousRecognitionSession_Completed;

        //認識開始
        await contSpeechRecognizer.ContinuousRecognitionSession.StartAsync();
    }

    private async void ContinuousRecognitionSession_Completed(SpeechContinuousRecognitionSession sender, SpeechContinuousRecognitionCompletedEventArgs args)
    {
        await dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
        {
            textBlock1.Text = "Timeout.";
        });

        // 音声を再度待ち受け
        await contSpeechRecognizer.ContinuousRecognitionSession.StartAsync();
    }

    private async void ContSpeechRecognizer_HypothesisGenerated(
        SpeechRecognizer sender, SpeechRecognitionHypothesisGeneratedEventArgs args)
    {
        //認識途中に画面表示
        await dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
        {
            textBlock1.Text = args.Hypothesis.Text;
        });
    }

    private async void ContinuousRecognitionSession_ResultGenerated(
        SpeechContinuousRecognitionSession sender, SpeechContinuousRecognitionResultGeneratedEventArgs args)
    {
        //認識完了後に画面に表示
        await dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
        {
            textBlock1.Text = "Waiting ...";
            output.Text += args.Result.Text + "。\n";
        });
    }
}