[opus] Opus DTX issue report

Pascal Huart (phuart) phuart at cisco.com
Mon Jun 2 12:29:16 PDT 2014


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.

Gonzalo Mariano and Pascal Huart

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.xiph.org/pipermail/opus/attachments/20140602/1f90bec3/attachment-0001.htm 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: opusDtx_whtnoise.wav
Type: audio/wav
Size: 3199642 bytes
Desc: opusDtx_whtnoise.wav
Url : http://lists.xiph.org/pipermail/opus/attachments/20140602/1f90bec3/attachment-0001.bin 

More information about the opus mailing list