Hello:
We noticed that opus reconstructed noise is pulsing with a 400ms pattern when
dtx is enabled in silk mode. This is independent of the background noise level
and is found with speech + non-speech period test files as well as variable
level noise-only test files. This issue can be reproduced with opus v1.1 using
this command:
./opus_demo voip 16000 1 25000 -dtx input.bin output.bin
We have attached a .wav file with the first channel as the input reference noise
signal and the second channel as the opus codec output using the opus_demo
application. It does not look like this has been reported already. We would like
your feedback.
Thanks,
Gonzalo Mariano and Pascal Huart
Cisco
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Hello:
We noticed that opus reconstructed noise is pulsing with a 400ms pattern when
dtx is enabled in silk mode. This is independent of the background noise level
and is found with speech + non-speech period test files as well as variable
level noise-only test files. This issue can be reproduced with opus v1.1 using
this command:
./opus_demo voip 16000 1 25000 ?dtx input.bin output.bin
We have attached a .wav file with the first channel as the input reference noise
signal and the second channel as the opus codec output using the opus_demo
application.It does not look like this has been reported already. We would like
your feedback.
Thanks,
Gonzalo Mariano and Pascal Huart
Cisco
-------------- next part --------------
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Hi Gonzalo, Thanks for reporting this DTX issue. It should now be fixed in git. Can you confirm this it is indeed the case? Cheers, Jean-Marc On 19/05/14 10:20 AM, Gonzalo Mariano (gmariano) wrote:> Hello: > > > > We noticed that opus reconstructed noise is pulsing with a 400ms pattern > when dtx is enabled in silk mode. This is independent of the background > noise level and is found with speech + non-speech period test files as > well as variable level noise-only test files. This issue can be > reproduced with opus v1.1 using this command: > > ./opus_demo voip 16000 1 25000 ?dtx input.bin output.bin > > > > We have attached a .wav file with the first channel as the input > reference noise signal and the second channel as the opus codec output > using the opus_demo application.It does not look like this has been > reported already. We would like your feedback. > > > > Thanks, > > Gonzalo Mariano and Pascal Huart > > Cisco > > > > > > > > _______________________________________________ > opus mailing list > opus at xiph.org > http://lists.xiph.org/mailman/listinfo/opus >
Hello: I am currently on Holiday ... perhaps my colleague Pascal can confirm the fix. If not, I'll check after I return to work on Monday 7/7. Thanks for your work. Regards, Gonzalo -----Original Message----- From: Jean-Marc Valin [mailto:jmvalin at jmvalin.ca] Sent: Friday, June 20, 2014 3:05 AM To: Gonzalo Mariano (gmariano); opus at xiph.org Cc: Pascal Huart (phuart) Subject: Re: [opus] Opus DTX issue report Hi Gonzalo, Thanks for reporting this DTX issue. It should now be fixed in git. Can you confirm this it is indeed the case? Cheers, Jean-Marc On 19/05/14 10:20 AM, Gonzalo Mariano (gmariano) wrote:> Hello: > > > > We noticed that opus reconstructed noise is pulsing with a 400ms > pattern when dtx is enabled in silk mode. This is independent of the > background noise level and is found with speech + non-speech period > test files as well as variable level noise-only test files. This issue > can be reproduced with opus v1.1 using this command: > > ./opus_demo voip 16000 1 25000 -dtx input.bin > output.bin > > > > We have attached a .wav file with the first channel as the input > reference noise signal and the second channel as the opus codec output > using the opus_demo application.It does not look like this has been > reported already. We would like your feedback. > > > > Thanks, > > Gonzalo Mariano and Pascal Huart > > Cisco > > > > > > > > _______________________________________________ > opus mailing list > opus at xiph.org > http://lists.xiph.org/mailman/listinfo/opus >