Sreekanth Annapureddy
2012-Mar-09 01:18 UTC
[Speex-dev] Generating comfort noise with preprocessor VAD
Hello, I am trying to use the preprocessor VAD to encode at lower bitrate during silence periods. I am able to run the preprocessor and get the VAD flag for each frame, and I am quite happy with it's performance. I would like to know how to pass the preprocessor VAD flag to speex encoder -- basically, i want to force the encoder to generate comfort noise when preprocessor detects silence. Currently, as a work around, I am encoding speech frames at high quality, and silence frames at low quality (say 0). But lower quality audio (silence or speech from far-away people) sounds really bad, and I want to know how to substitute these non-speech frames with comfort noise. I know that comfort noise is inserted automatically if I use the VAD provided by codec, but I want to know how to achieve the same using preprocesser VAD. Thanks, Sreekanth -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.xiph.org/pipermail/speex-dev/attachments/20120308/c44c2e2b/attachment.htm