C#:使用 System.Speech 命名空间将 WAV 文件转录为文本(语音到文本)

Question

如何使用 .NET 语音命名空间类在 WAV 中转换音频将文件转换为文本形式，我可以在屏幕上显示或保存到文件？

我正在寻找一些教程示例。

更新

找到代码示例 here .但是当我尝试它时，它给出了错误的结果。下面是我采用的 vb 代码示例。 (实际上我不介意 lang，只要它是 vb/c#...)。它没有给我正确的结果。我假设如果我们使用正确的语法——即我们在录音中期望的单词——我们应该得到它的文本输出。首先，我尝试使用通话中的示例词。它有时只打印那个(一个)词而没有别的。然后我尝试了我们完全不希望在录音中出现的词......不幸的是它也打印出来了...... :(

Imports System
Imports System.Speech.Recognition

Public Class Form1

    Dim WithEvents sre As SpeechRecognitionEngine

    Private Sub btnLiterate_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnLiterate.Click
        If TextBox1.Text.Trim.Length = 0 Then Exit Sub
        sre.SetInputToWaveFile(TextBox1.Text)
        Dim r As RecognitionResult
        r = sre.Recognize()
        If r Is Nothing Then
            TextBox2.Text = "Could not fetch result"
            Return
        End If
        TextBox2.Text = r.Text
    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        TextBox1.Text = String.Empty
        Dim dr As DialogResult
        dr = OpenFileDialog1.ShowDialog()
        If dr = Windows.Forms.DialogResult.OK Then
            If Not OpenFileDialog1.FileName.Contains("wav") Then
                MessageBox.Show("Incorrect file")
            Else
                TextBox1.Text = OpenFileDialog1.FileName
            End If
        End If
    End Sub

    Public Sub New()

        ' This call is required by the Windows Form Designer.
        InitializeComponent()

        sre = New SpeechRecognitionEngine()

    End Sub

    Private Sub sre_LoadGrammarCompleted(ByVal sender As Object, ByVal e As System.Speech.Recognition.LoadGrammarCompletedEventArgs) Handles sre.LoadGrammarCompleted

    End Sub

    Private Sub sre_SpeechHypothesized(ByVal sender As Object, ByVal e As System.Speech.Recognition.SpeechHypothesizedEventArgs) Handles sre.SpeechHypothesized
        System.Diagnostics.Debug.Print(e.Result.Text)
    End Sub

    Private Sub sre_SpeechRecognitionRejected(ByVal sender As Object, ByVal e As System.Speech.Recognition.SpeechRecognitionRejectedEventArgs) Handles sre.SpeechRecognitionRejected
        System.Diagnostics.Debug.Print("Rejected: " & e.Result.Text)
    End Sub

    Private Sub sre_SpeechRecognized(ByVal sender As Object, ByVal e As System.Speech.Recognition.SpeechRecognizedEventArgs) Handles sre.SpeechRecognized
        System.Diagnostics.Debug.Print(e.Result.Text)
    End Sub

    Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        Dim words As String() = New String() {"triskaidekaphobia"}
        Dim c As New Choices(words)
        Dim grmb As New GrammarBuilder(c)
        Dim grm As Grammar = New Grammar(grmb)
        sre.LoadGrammar(grm)
    End Sub

End Class

更新(11 月 28 日之后)

找到了一种加载默认语法的方法。它是这样的:

sre.LoadGrammar(New DictationGrammar)

这里还有问题。识别不准确。输出是垃圾。对于一个 6 分钟的文件，它可能会给出 5-6 个与语音文件完全无关的文本词。

Answer 1

System.Speech 中的类用于文本到语音(主要是辅助功能)。

您正在寻找语音识别。有 System.Speech.Recognition自 .Net 3.0 起可用的命名空间。它使用 Windows 桌面语音引擎。这可能会让你开始，但我想那里有更好的引擎。

语音识别非常复杂，很难做到正确，也有一些商业产品可用。