Problem with decoding G.722.1 Annex C payload from RTP in 7.0

Problem with decoding G.722.1 Annex C payload from RTP in 7.0

Portrait de Alexander U.
Alexander U.
ven, 05/10/2012 - 00:42

Hi,

I use IPP 7.0 in part of speech codecs. OS - Linux.

I have RTP dump  with G.722.1 Annex C (32 kHz, 48 kbps) captured from Polycom phone.

To decode the dump I have written own app with using IPP 7.0 and IPP USC samples, but instead voice I have heard noise only.

Is needed any manipulations with RTP payload before set it to G.722.1C decoder?

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Portrait de Chao Y (Intel)
Chao Y (Intel)
mer, 10/10/2012 - 00:22

Hello,

The USC sample include the one sample code to showing decoding the rtp dump file. Do you use that application, or do you directly calling G.722 codec. The codec only decode raw speech, no rtp headers.

Thanks,
Chao

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Portrait de Alexander U.
Alexander U.
mer, 17/10/2012 - 02:29

Chao,
thanks for your response.

Yes, sure, I use USC sample code in my application. I try to decode raw speech frame without RTP header, payload only.
I want to take your attention that I try decode G.722.1 Annex C, non-plain G.722.1.
I can see that umc_speech_rtp_codec is supported on Windows only, and G.722.1 Annex C is not planned to support there.

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Portrait de Alexander U.
Alexander U.
jeu, 25/10/2012 - 02:04

Chao,
Could you clarify this situation?

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