| 10 Jun 2004 09:25 pm |
karen Guest |
Dear friends,
Recently I downloaded the G.723.1 speech codec ANSI C source code from the ITU-T recommendation site.
I tried to execute the recommendation G723.1 Annex A C source code on Dos,
I use the following command format:
lbccodec -c inputfile.wav outputFile.g723 — — — -create an encoded file
lbccodec -d outputFile.g723 output.wav — — — -decode the above encoded file
Then, I try to use the Windows media player to play the output.wav, but it always failed to play and I got the error alert is " the invalid type file”.
So far I don’t know how to solve it, would you please give me some hints. Or can I evaluate the source code like this?
Any answer will be appreciated very much.
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| 12 Nov 2004 12:03 pm |
Scott Guest | Karen,
The ITU “C” code does not create the decoder output file in .WAV format. It is in raw 16-bit PCM format. To convert to .WAV format, you need to put a 44 byte header in front of the file. I can send you a utility to do this.
Scott
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| 23 Aug 2006 08:12 am |
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| 29 Aug 2006 03:13 am |
smab Guest | Hi Scott,
Could you please post the utility to convert to wave format!!!
Thanks in advance
smab
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| 01 Sep 2006 03:20 am |
umar Guest | g723 will encode/decode only raw data
linix/unix command SOX will convert raw data to WAV file and also otherway
see man sox for help
sox -V -sw -c 1 -r 8000 file.raw file.wav
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| 16 Jan 2007 11:38 pm |
som Guest | Can some body send me the g.723 codec & that utility please!
er.somnt@gmail.com
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| 30 Jun 2007 02:59 am |
kaleem Guest | I m new to voip, can some one provide me the 44 byte header for G723.1 and the way how can i use the sox in dos to convert raw g723 to g723.1
mkawan05@yahoo.com
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| 12 May 2008 01:17 am |
john_jk Guest | Friends you can find various audio codecs including G.723/G.723.1 at www.ipsupermarket.com
i am not sure about pricing/free download etc
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