[opus] opus Digest, Vol 45, Issue 5

[Jean-Marc Valin]

You can use the echo canceller that goes with Speex even if you're using
Opus. The two are independent.

	Jean-Marc

On 12-10-16 09:30 PM, Guan Xsun wrote:
> hi,All, 
>    I want to know whether Opus has AEC features like Speex?
> 
> 
> 
>    Thanks
> 
> 
> 2012/10/17 <opus-request at xiph.org <mailto:opus-request at xiph.org>>
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>     Today's Topics:
> 
>        1. encoding 44.1Khz (Sartre Salam)
>        2. Re: encoding 44.1Khz (Ralph Giles)
> 
> 
>     ----------------------------------------------------------------------
> 
>     Message: 1
>     Date: Tue, 16 Oct 2012 12:48:49 +0100 (BST)
>     From: Sartre Salam <gmxubuntu at yahoo.de <mailto:gmxubuntu at yahoo.de>>
>     Subject: [opus] encoding 44.1Khz
>     To: "opus at xiph.org <mailto:opus at xiph.org>" <opus at xiph.org
>     <mailto:opus at xiph.org>>
>     Message-ID:
>             <1350388129.15298.YahooMailNeo at web171605.mail.ir2.yahoo.com
>     <mailto:1350388129.15298.YahooMailNeo at web171605.mail.ir2.yahoo.com>>
>     Content-Type: text/plain; charset="iso-8859-1"
> 
>     Hi , I have read that it is posible to encode higher sample
>     rates like 96 khz or 192khz? and the output is 48 khz,
>     the resample is internally.? http://wiki.xiph.org/OpusFAQ
>     But it is possible to encode? 44.1khz. It is resampled to
> 
>     48khz or I have to make the resample by myself and
> 
>     then encode it with opus.
> 
>     thnx, arctor
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>     ------------------------------
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>     Message: 2
>     Date: Tue, 16 Oct 2012 09:50:21 -0700
>     From: Ralph Giles <giles at thaumas.net <mailto:giles at thaumas.net>>
>     Subject: Re: [opus] encoding 44.1Khz
>     To: Sartre Salam <gmxubuntu at yahoo.de <mailto:gmxubuntu at yahoo.de>>
>     Cc: "opus at xiph.org <mailto:opus at xiph.org>" <opus at xiph.org
>     <mailto:opus at xiph.org>>
>     Message-ID: <507D904D.8050505 at thaumas.net
>     <mailto:507D904D.8050505 at thaumas.net>>
>     Content-Type: text/plain; charset=ISO-8859-1
> 
>     On 12-10-16 4:48 AM, Sartre Salam wrote:
>     > Hi , I have read that it is posible to encode higher sample
>     > rates like 96 khz or 192khz  and the output is 48 khz,
>     > the resample is internally.  http://wiki.xiph.org/OpusFAQ
>     > But it is possible to encode  44.1khz. It is resampled to
>     > 48khz or I have to make the resample by myself and
>     > then encode it with opus.
> 
>     Encoding tools, like opusenc from the opus-tools package, will take care
>     of resampling for you. Just feed in any PCM wav file and it
>     should be fine.
> 
>     If instead you're writing a program yourself that uses the reference
>     libopus API, then yes, you need to resample 44.1 kHz audio
>     to 48 kHz before submitting it to opus_encode(_float).
> 
>      -r
> 
> 
> 
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>     End of opus Digest, Vol 45, Issue 5
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