Voice recognition with AudioRecord

[brelto85]

Hi,

there's a way (and the example) to register audio (in VOICE_RECOGNITION mode) and capture the voice in a string?
would be perfect if there was no need to save it to a wav file, but listening in real time

I looked the AudioRecord library and test project but i can't retrieve the string during the registration

thanks

 

[Erel]

I don't think that you will be able to combine voice recognition with audio recording.

 

[brelto85]

Remember though that you had responded to a few posts, that the only way was to use AudioRecord to record a voice continuously.

The library voicerecognition and similar, listens for a given time

 

[brelto85]

is possible to do that?

 

[stevel05]

I had a look at the android developers site, it appears that the Voice recognition uses audiorecord to capture the voice, but there doesn't appear to be any way to interact with that process. It's all done within the Voice recognition itself.

If you can find any examples done in Java, it might give a clue if it can be done, but I couldn't see one.

 

[brelto85]

but if AudioRecord library has the AudioSource property (with A_SRC_VOICE_RECOGNITION value) and is possible retrieve the buffer like this way,

Dim RecData() As Byte
RecData=AR.ReadBytes(0,BufferSize)

...recdata should contain the buffer of the voice recognition bytes?
Doing after a conversion, could be possible retrieve a string

 

[stevel05]

The Audio source is described here, it's not a different buffer, but just allows recording from a device that is tuned for voice recognition.

 

[brelto85]

ok, and this buffer is possible to convert it in a string?

For example:

if "AudioRecord" records "ciao", in the buffer there's a bytes array of "ciao"....right?
if yes, there's a way to convert the byte array to retrieve the string "ciao"?

 

[stevel05]

No, it doesn't seem like it is possible to access the recorded data when using voice recognition.

 

[brelto85]

maybe i explained evil, but I do not want to use the library voicerecognition during recording.

I want to record voice and recover the spoken word in a string.

 

[stevel05]

Perhaps I am not understanding you properly, but the SpeechRecognizer is a complete process, there doesn't appear to be any interface other than the provided one which does the recording it needs.

It doesn't seem possible to feed a pre-recorded file into the recognizer object.

 

[brelto85]

i'm sorry, probably my english is not good

The problem is that the SpeechRecognizer, listens only for a given period and not continuously.
I was able to do a listen continuously, restarting the listening in "SpeechRecognizer_Results" event

My goal is to run a service in background that listens a command (es: "CALL ....." , "SEND ....")
not knowing when the user speak, i've need to run this service in a continuous way

 

[stevel05]

I haven't come across anything that can do that so far.

 

[susu]

My goal is to run a service in background that listens a command (es: "CALL ....." , "SEND ....")
not knowing when the user speak, i've need to run this service in a continuous way

I don't think it's possible because your device will always in "listen mode" that drain the battery and occupy the microphone. As you can see all voice recognition apps have a button like "press and speak".

 

[brelto85]

Determined that the AudioRecord library cannot convert the recording into a string, i found these library on the Android API documentation

Analizying this example, i think it is possible start the trigger that listens continuously the speech.

Even if the example writes a speech into a text, you can create a library for B4A based on this?