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Re: Action item. definition and use of Clean audio in European television

From: David Singer <singer@apple.com>
Date: Tue, 24 May 2011 12:35:19 -0700
Message-id: <AE68B126-E53C-4072-939E-6D40707B0336@apple.com>
To: "HTML Accessibility Task Force (public-html-a11y@w3.org)" <public-html-a11y@w3.org>

On May 23, 2011, at 21:39 , Silvia Pfeiffer wrote:

> Not quite when you look at those that talk about "clean audio" in the
> way that we do. There, only "foreground dialogue and speech" is
> explicitly mentioned, e.g. http://www.guidogybels.eu/cap3.html. Note
> that the overall effect of the presentation may be to receive "clean
> audio" in the way that you describe, but the track's content is not
> clean audio, but only "foreground dialogue and speech".
>>> ETSI actually call a channel that contains speech-only for "clean
>>> audio" purposes a "hearing impaired" channel. At least this describes
>>> what the channel is being used for. "speech" would describe what it
>>> contains. "clean audio" give a false indication of better sound
>>> quality. I would be ok with "foreground sound", too, but I would be
>>> very unhappy about the term "clean audio".
>> How do you feel about 'contrast enhanced' or 'high contrast' or 'low distraction'?
>> But...as you say...I'd like to use industry terms even if, to our ear, they are not ... very clean. :-)
> I think you believe that other sounds than speech and dialogue are
> also enhanced/extracted for "clean audio". That is explicitly not the
> case IIUC.

I think we can use an industry term, such as 'clean audio' or 'clean speech', and make it clear in the documentation that this is the 'primary program material, without extraneous or aesthetic background sounds'.

I imagine that in a program about whale-song, with schlocky new-age poetry being read in the background for 'effect', the 'clean' audio would be the whale-song without the poetry, for example.  But given decent documentation, the author could work that out, even if the label says 'speech'.

David Singer
Multimedia and Software Standards, Apple Inc.
Received on Tuesday, 24 May 2011 19:35:48 UTC

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