Re: [codec] Tübingen Test plan

"Benjamin M. Schwartz" <bmschwar@fas.harvard.edu> Mon, 15 August 2011 17:59 UTC

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Date: Mon, 15 Aug 2011 14:00:09 -0400
From: "Benjamin M. Schwartz" <bmschwar@fas.harvard.edu>
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To: Christian Hoene <hoene@uni-tuebingen.de>
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Subject: Re: [codec] =?utf-8?q?T=C3=BCbingen_Test_plan?=
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> What audio bandwidths are you planning to use for the Opus test cases?
> 
> */[Christian Hoene] Actually, Opus selects the mode by itself. I have
> printed out the following data/*
...
> */Mode HYBRID bitRate 32000 fs 48000 channels 2 framesize 960/*
> 
> */Mode SILK bitRate 16000 fs 48000 channels 2 framesize 960/*

I'm not sure what you mean by "printed out" ... but bear in mind that Opus
always supports a samplerate (fs) of 48000, regardless of the audio
bandwidth.  I believe the current encoder's bandwidth-selection heuristics
would code 16kbps stereo Silk at Narrowband (4 kHz bandpass), and 32kbps
stereo Hybrid at Superwideband (12 kHz bandpass).

--Ben