W3C home > Mailing lists > Public > public-speech-api@w3.org > September 2012

Re: TTS proposal to split Utterance into its own interface

From: Glen Shires <gshires@google.com>
Date: Tue, 11 Sep 2012 03:02:20 -0700
Message-ID: <CAEE5bcj4WVyRm37Awnp3X3_LSYyrh803Zkw-GiS4czJAu=V=fA@mail.gmail.com>
To: Dominic Mazzoni <dmazzoni@google.com>
Cc: Hans Wennborg <hwennborg@google.com>, olli@pettay.fi, public-speech-api@w3.org
I propose the following definitions for the SpeechSynthesis IDL:

SpeechSynthesis Attributes

pending attribute:
This attribute is true if the queue contains any utterances which have not
completed playback.

speaking attribute:
This attribute is true if playback is in progress.

paused attribute:
  **** How is this different than (pending && !speaking) ? ****


SpeechSynthesis Methods

The speak method
This method appends the utterance to the end of a playback queue. If
playback is not in progress, it also begins playback of the next item in
the queue.

The cancel method
This method removes the first matching utterance (if any) from the playback
queue. If playback is in progress and the utterance removed is being
played, playback ceases for the utterance and the next utterance in the
queue (if any) begins playing.

The pause method
This method pauses the playback mid-utterance. If playback is not in
progress, it does nothing.

The continue method
This method continues the playback at the point in the utterance and queue
in which it was paused.  If playback is in progress, it does nothing.

The stop method.
This method stops playback mid-utterance and flushes the queue.


SpeechSynthesisUtterance attributes

text attribute:
The text to be synthesized for this utterance. This attribute must not be
changed after onstart fires.

lang attribute:
[no change]

serviceURI attribute:
[ no change]

speaking attribute:
This attribute is true if this specific utterance is currently being played
back.

paused attribute:
This attribute is true if this specific utterance is in the queue and has
not completed playback.

ended attribute:
This attribute is true if this specific utterance has completed playback.

SpeechSynthesisUtterance events

onstart event:
Fired when this utterance has begun playback.

onend event:
Fired when this utterance has completed playback.


On Tue, Sep 11, 2012 at 2:58 AM, Glen Shires <gshires@google.com> wrote:

> I've updated the spec with the IDL and Examples:
> https://dvcs.w3.org/hg/speech-api/rev/ac45dde583b1
>
> As always, the current draft spec is at:
> http://dvcs.w3.org/hg/speech-api/raw-file/tip/speechapi.html
>
>
> On Mon, Aug 20, 2012 at 7:56 AM, Dominic Mazzoni <dmazzoni@google.com>wrote:
>
>> On Mon, Aug 20, 2012 at 2:48 AM, Hans Wennborg <hwennborg@google.com>
>> wrote:
>> > (Which makes me wonder if we should do the same for speech recognition
>> too?)
>>
>> Makes sense! Let's keep them symmetrical either way.
>>
>> > I wonder if we could come up with a less verbose name than
>> > stopAndFlushQueue, but that's just a minor detail.
>>
>> You could just call is stop() or silence() and add a comment saying it
>> flushes the queue.
>>
>> >>>>    attribute DOMString serviceURI;
>> >
>> > What does serviceURI do in this context?
>>
>> It should be possible to have multiple utterances that go to different
>> speech services - for example two different voices.
>>
>> - Dominic
>>
>>
>
Received on Tuesday, 11 September 2012 10:03:30 UTC

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