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[codec] I-D Action:draft-ietf-codec-opus-05.txt

Keith Yan <Keithy@hz.webex.com> Tue, 22 March 2011 06:01 UTC

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From: Keith Yan <Keithy@hz.webex.com>
To: Keith Yan <Keithy@hz.webex.com>, Jean-Marc Valin <jean-marc.valin@octasic.com>
Date: Tue, 22 Mar 2011 14:03:02 +0800
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Subject: [codec] I-D Action:draft-ietf-codec-opus-05.txt
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Dear Jean-Marc,

         I have done some FEC related testing based on V0.9.3, from the test result, Opus can congest lost rate <10% well, but to high lost rate, it performances not as well as SILK.

I do a competition with SILK V1.0.7. Following is my test condition:

a.       Set encode bitrates to 40kbps

b.       Enable inband FEC and set max lost rate is 20%

c.       Set OPUS_MODE_VOICE for Opus V0.9.3, MODE_SILK_ONLY for Opus V0.9.1, and set BANDWIDTH_WIDEBAND for V0.9.3 and V0.9.1.



Test it in different lost rate condition, then compute PESQ and PESQ-LQO for result file. From following table, we can see that Opus can’t congest 20% lost rate as well as SILK.

Would you please help to check it.



[cid:image002.png@01CBE899.DC0D4A90]





Regards

Keith

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