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Re: [codec] Listening tests at Google

Paul Beaumont <paulbeaumont.ietf@gmail.com> Tue, 18 October 2011 23:01 UTC

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Date: Wed, 19 Oct 2011 00:01:23 +0100
From: Paul Beaumont <paulbeaumont.ietf@gmail.com>
To: Jan Skoglund <jks@google.com>, IETF - CoDec <codec@ietf.org>
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Subject: Re: [codec] Listening tests at Google
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Hi Jan

Thank you for performing and sharing the results of your testing.

Please can you summarise what you see as the key findings wrt ...

1). Opus on Mandarin speech - be good to baseline this against comparable
English speech results and
2). Opus when Transcoded/Tandemed

Regards
Paul

--

On 14/09/2011 06:59, "Jan Skoglund" <jks@google.com> wrote:

>Hey,
>
>The listening tests at Google are now done and here are the results.
>
>Regards,
>Jan
>
>
>On Fri, Aug 19, 2011 at 3:28 PM, Jan Skoglund <jks@google.com> wrote:
>> Hey,
>>
>> We've prepared some listening tests for Opus on Mandarin speech and
>> transcoding (English) speech at Google. We started the tests today and
>> will have results at the end of August. The tests are split in four
>> MUSHRA groups:
>>
>> Test 1a - Mandarin NB
>> --------------------------
>> Opus NB
>> Speex NB
>> iLBC NB
>> Reference and 2 anchors (LP 3.5 kHz and MNRU of 15 dB)
>>
>> Test 1b - Mandarin "HD Voice" (WB, FB)
>> --------------------------------------------------------
>> Opus FB
>> G.719 FB
>> Opus WB
>> Speex WB
>> G.722.1 WB
>> Reference and 2 anchors (LP 3.5 kHz and LP 7 kHz)
>>
>> Test 2a - Transcoding NB
>> -------------------------------
>> G.711 -> Opus NB
>> G.711 -> AMR-NB
>> Opus NB -> G.711 -> AMR-NB
>> AMR-NB -> G.711 -> Opus NB
>> AMR-NB -> G.711 -> AMR-NB
>> Reference and 2 anchors (LP 3.5 kHz and MNRU of 15 dB)
>>
>> Test 2b - Transcoding WB
>> --------------------------------
>> Opus WB
>> AMR-WB
>> Opus WB -> AMR-WB
>> AMR-WB -> Opus WB
>> Reference and 2 anchors (LP 3.5 kHz and LP 7 kHz)
>>
>>
>> Cheers,
>> Jan
>>
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