MSSpeech Forum : Speech Recognition for a wave file https://www.msspeech-forum.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Wed, 29 Apr 2026 15:37:10 +0000 Tue, 07 Apr 2009 09:25:50 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.02 360 https://www.msspeech-forum.com/RSS_post_feed.asp?TID=72 <![CDATA[MSSpeech Forum]]> https://www.msspeech-forum.com/forum_images/msspeech_forum.png https://www.msspeech-forum.com/ <![CDATA[Speech Recognition for a wave file : gkhanna wrote:Currently I am...]]> https://www.msspeech-forum.com/speech-recognition-for-a-wave-file_topic72_post330.html#330 Author: mmarkoe
Subject: 72
Posted: 07/Apr/2009 at 9:25am

Originally posted by gkhanna gkhanna wrote:

Currently I am working on a project which can recognize the speech in a wave file. I am using SpeechRecognitionEngine class in Framework 3.5. I want to display each word which in said in wave file (something like we see in movies where every sentences spoken is display in text below). Wave file could be a voice of a person or a song. When I try to using Recognize function it only display first 4-5 words from the wave file and they are totally wrong, and have confidence level 0.004. When I try to do it asynchronously (RecognizeAsync function) then speech is not detected at all. I have also tried SAPI 5.3 but I get wrong result.
 
It sounds to me as if you have been watching too many Star Wars movies and forgotten that this is the 21st century not the 25th century.  There's not enough computing power in the world to do what you were requiring.  Large vocabulary Speech Recognition today is capable of very high accuracy.  However, it is speaker dependent.  This means to work optimally (I would call it usefully to the point where you understand what speakers say) it needs to be trained to an individual's voice.  Speech recognition software does not just listen for the sounds of words but also compares each word to the around it for context clues.
 
Therefore, large vocabulary speech recognition works best:
  1. An individual speaker creates a user training profile unique to their voice's audio quality and has samples of this person's typical syntax.
  2. The  individual speaker enunciates each word clearly as they are speaking.
  3. The speaker speaks in phrases.
  4. When speaking, they use punctuation marks to indicate pauses and the beginnings of sentences and paragraphs.

It is highly unlikely the public speaker would be willing to do the above.  Also, when you try to decipher more than one voice, the task becomes geometrically more difficult.

Marty Markoe

]]> Tue, 07 Apr 2009 09:25:50 +0000 https://www.msspeech-forum.com/speech-recognition-for-a-wave-file_topic72_post330.html#330 <![CDATA[Speech Recognition for a wave file : Currently I am working on a...]]> https://www.msspeech-forum.com/speech-recognition-for-a-wave-file_topic72_post329.html#329 Author: gkhanna
Subject: 72
Posted: 07/Apr/2009 at 2:55am

Currently I am working on a project which can recognize the speech in a wave file. I am using SpeechRecognitionEngine class in Framework 3.5. I want to display each word which in said in wave file (something like we see in movies where every sentences spoken is display in text below). Wave file could be a voice of a person or a song. When I try to using Recognize function it only display first 4-5 words from the wave file and they are totally wrong, and have confidence level 0.004. When I try to do it asynchronously (RecognizeAsync function) then speech is not detected at all. I have also tried SAPI 5.3 but I get wrong result.

Below is my code

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load        Dim rec As New Speech.Recognition.SpeechRecognitionEngine        Dim fs As New FileStream("C:\Test.wav", FileMode.Open, FileAccess.Read)        rec.SetInputToWaveStream(fs)        rec.LoadGrammar(New DictationGrammar)        AddHandler rec.SpeechRecognized, AddressOf SpeechRecognized_Click        AddHandler rec.RecognizeCompleted, AddressOf RecognizedComplete_Click        rec.RecognizeAsync(RecognizeMode.Multiple)     End SubPrivate Sub SpeechRecognized_Click(ByVal sender As Object, ByVal e As SpeechRecognizedEventArgs)        Dim result As RecognitionResult = e.Result        RichTextBox1.AppendText(result.Text)End SubPrivate Sub RecognizedComplete_Click(ByVal sender As Object, ByVal e As RecognizeCompletedEventArgs)        Dim result As RecognitionResult = e.Result        MsgBox(result.Text)End Sub
Below link contains the voice file which contains wave file which I am giving as input.
 
Thanks,
Gaurav Khanna
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