Re: [codec] Listening tests at Google

Jan Skoglund <jks@google.com> Fri, 21 October 2011 19:59 UTC

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From: Jan Skoglund <jks@google.com>
Date: Fri, 21 Oct 2011 15:59:12 -0400
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To: Butrus Damaskus <butrus.butrus@gmail.com>
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Subject: Re: [codec] Listening tests at Google
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I think it can be due to the character of Mandarin speech (although
I'm not a linguist), which does not seem to contain as much high
frequency-rich consonants as English. I noticed that during recording
of the Mandarin speech, and discussing afterwards with the talkers,
who said that there are much more, e.g., [s] sounds in English.

On Thu, Oct 20, 2011 at 11:39 AM, Butrus Damaskus
<butrus.butrus@gmail.com> wrote:
> On Thu, Oct 20, 2011 at 4:32 PM, Jan Skoglund <jks@google.com> wrote:
>> These results are pretty consistent
>> with the previous results for English speech, with the difference that
>> in the previous test Opus at 20 kbps outperformed G.719 at 32 kbps,
>> which it did not this time.
>
> Does it mean that there is a regression or is it rather due to the
> character of the Mandarine speech?
>