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[whatwg] Text-To-Speech (TTS) Web API for JavaScript

From: Weston Ruter <westonruter@gmail.com>
Date: Thu, 10 Dec 2009 16:54:00 -0800
Message-ID: <fb8299e10912101654p4a03fa77n574eb1349027501@mail.gmail.com>
I've been working on a web app which reads text in a web page, highlighting
each word as it is read. For this to be possible, a Text-To-Speech API is
needed which is able to:
(1) generate the speech audio from some text, and
(2) include the time indicies for when each of the words in the text is
spoken.

Microsoft has its Sapi.SpVoice API via ActiveXObject which does (1) but not
(2) apparently. There are web services (usable in conjunction with HTML5
Audio) which also do (1) such as the iSpeech
API<http://www.ispeech.org/api> and
Google Translate's TTS <
http://translate.google.com/translate_tts?q=Hello%2C+World&tl=en>, but none
that I have found which do (2). In any case, web services
aren't preferable since they require that the audio be transferred over the
network which could take a significant amount of time.

Is anyone aware of any work done to develop a standard TTS API for the Web?
Operating systems already have this functionality built-in, and it's a shame
that web apps can't make use of it. If Google Gears were alive, it would've
been a good place to prototype this, but alas?

Thanks,
Weston
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