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conter
Beginner
95 Views

some issue about codec G.722

i using IPP codec to decode RTP packet that codec is G.722(paylaod type is 9)
in IPP setting is defult setting.
the decode result, the voice was not real sound, like cow sound.
in IPP codec, may have some parameter setting different with G.711 ?
becouse i using G.711 RTP packet, IPP can be decode real sound.
i understand G.711 and G.722 codec setting parameter in different C file.
can help me to solve this problem?
sussess codec : G.711,G.723,G.729
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2 Replies
Igor_B_Intel1
Employee
95 Views

Hi,
A lot of things may lead to thisbehaviour. The mostprobably you have set wrong frame parameters while calling USC Decode function.

Please review umc_speech_rtp_codec sample. It located insample package for Windows. There you can find an examles of how to convert RTP payload data from/to USC compartible data for mostly all supporded speech codecs.

Igor S. Belyakov
conter
Beginner
95 Views

Dear sir:
I using umc_speech_rtp_codec sample to decode the G.722 rtpdump file that create by wireshark,
and using command :

umc_speech_rtp_codec.exe -format IPP_G722 -r64000 -b9 -p1387 D:\IPP\G722-2 D:\IPP\2222.wav

i did not change any parameter in umc_speech_rtp_codec in sample code,

but, the result wav has not any sound.

i don't understand is my rtpdump file has some problem , or umc_speech_rtp_codec sample has some parameter that i did not setting.

in the same stream,using my program can be decode,but the voice like cow sound,but use umc_speech_rtp_codec sample code is not has any sound.

please help me

thanks

Best Regards

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