[opus] Audio quality for or different samping rates but same audio bandwidth

Dan Arrhenius dan at keystream.se
Wed Mar 27 05:39:12 PDT 2013


Hi,
I wrote a small test program to illustrate the problem. But when using the test program we get expected quality, so we must be doing something wrong in out original code. I will have a closer look at out original code to see what we are doing wrong.

Best regards,
Dan

>The other important question is whether the problem happens when you
>encode at 24k or when you decode at 24k.
>
>	Jean-Marc
>
>On 03/21/2013 11:35 PM, Benjamin Schwartz wrote:
>>/  Could you be a little more explicit about what OPUS/24000 means? Are you
/>>/  calling libopus from C, or using some other encoding method?  What does
/>>/  "audio bandwidth set to narrowband" mean?  What version of libopus are
/>>/  you using?
/>>/  
/>>/  
/>>/  On Thu, Mar 21, 2013 at 9:51 AM, Olle Frimanson
/>>/  <olle.frimanson at keystream.se  <http://lists.xiph.org/mailman/listinfo/opus>  <mailto:olle.frimanson at keystream.se  <http://lists.xiph.org/mailman/listinfo/opus>>> wrote:
/>>/  
/>>/      Hi,____
/>>/  
/>>/      __ __
/>>/  
/>>/      We have observed a noticeable difference in audio quality for
/>>/      OPUS/24000 with audio bandwidth set to narrowband mode compared to
/>>/      OPUS/8000. The observation was that OPUS/8000 have better quality
/>>/      compared to OPUS/24000 in nb mode.____
/>>/  
/>>/      __ __
/>>/  
/>>/      All other settings was the same is this expected behavior?*/____/*
/>>/  
/>>/      */__ __/*
/>>/  
/>>/      __ __
/>>/  
/>>/      BR/Olle____
/>>/  
/>>/  
/>>/      _______________________________________________
/>>/      opus mailing list
/>>/      opus at xiph.org  <http://lists.xiph.org/mailman/listinfo/opus>  <mailto:opus at xiph.org  <http://lists.xiph.org/mailman/listinfo/opus>>
/>>/      http://lists.xiph.org/mailman/listinfo/opus
/>>/  
/>>/  
/>>/  
/>>/  
/>>/  _______________________________________________
/>>/  opus mailing list
/>>/  opus at xiph.org  <http://lists.xiph.org/mailman/listinfo/opus>
/>>/  http://lists.xiph.org/mailman/listinfo/opus
/>>/  

/

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