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Re: Comments from PFWG on CSS3 Speech Module

From: Daniel Weck <daniel.weck@gmail.com>
Date: Thu, 20 Oct 2011 01:42:00 +0100
Cc: W3C style mailing list <www-style@w3.org>, Bert Bos <bert@w3.org>, List WAI Liaison <wai-liaison@w3.org>, List WAI PF <w3c-wai-pf@w3.org>
Message-Id: <38229A34-D27E-42FC-8AF1-F03811A848EB@gmail.com>
To: Janina Sajka <janina@rednote.net>
Hello Janina (et al),
just a heads-up to let you know that the CSS Working Group has reviewed this issue, and the consensus is to keep the 'silent' value as-is. As per the W3C process, you may choose to accept this resolution, or you may decide to raise an objection. Please let us know.


Kind regards, Dan

On 17 Oct 2011, at 00:25, Daniel Weck wrote:

> Hello,
> there is an analogy between the volume levels that apply within the context of the "aural box model" defined by the CSS Speech specification, and the visibility of elements within the traditional CSS box model. In the visual world, invisible elements still
> occupy an area within the rendering space (i.e. the content is missing but the "box" is allocated nonetheless).
> Authors can use 'display:none' to properly "remove" content, and there is a similar feature in CSS3 Speech to properly deactivate an element within the aural dimension.
> Note that the 'silent' feature is compatible with the SSML model, and that one of the CSS-Speech design goals is to equip authors with mechanisms to represent equivalent SSML content (as best as possible).
> As for use-cases, the 'silent' value may be useful for fully fading volume levels in and out, or for authoring spoken text with "fill-in the blanks" empty spans. I am sure that are other valuable and creative usages though. :)
> Does this address your concerns?
> Kind regards, Daniel
> On 11 Oct 2011, at 20:25, Janina Sajka wrote:
>> 2.)	voice-volume: silent;
>> The spec should give an example of expected appropriate usage of this value.
>> Because this generates a period of silence equal to the length of the
>> would-be-spoken content, most listeners will just assume speech output has
>> prematurely stopped. In radio terms, this is "dead air." How do you expect this
>> value to be useful?
Received on Thursday, 20 October 2011 00:42:35 UTC

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