[opus] Why does opus scale down frequency from 22k to 20k ?

Orange Ubuntero orange at ubuntu-tw.org
Sat Aug 25 02:02:53 PDT 2012


Why does opus scale down frequency from 22k to 20k ?
64kbps<https://lh5.googleusercontent.com/-DGsEd1ijTBs/UDE3OFVrE5I/AAAAAAAADBo/bFcWQ6I4-Zk/s588/opus_64_test.png>

128kbps<https://lh3.googleusercontent.com/-3Wfvq6OPGRw/UDE3OClxEdI/AAAAAAAADBk/vsBJ9Gcd_pU/s589/opus_test.png>

192kbps<https://lh4.googleusercontent.com/-tfDAtdGM2Aw/UDE3N3mrFJI/AAAAAAAADBg/38weacOnQ7I/s588/opus_192_test.png>

this action will affect the quality of audio.

*Can this feature be disable in future ?*

And

*Can opus add no noise and echo in audio at high kbps *(192kbps +) *?*
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.xiph.org/pipermail/opus/attachments/20120825/4ba237ff/attachment.htm 


More information about the opus mailing list