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Re: Core Use Cases - v1.0

From: Chris Rogers <crogers@google.com>
Date: Thu, 9 Sep 2010 12:05:15 -0700
Message-ID: <AANLkTimOvUEs7jaTMLzy53jqavCtT0GRhBh=D-syLJeB@mail.gmail.com>
To: Alistair MacDonald <al@bocoup.com>
Cc: dave penkler <dpenkler@gmail.com>, "public-xg-audio@w3.org" <public-xg-audio@w3.org>, stefan.lk.hakansson@ericsson.com
Hi Al,

Processing live input (singing or plugging your guitar in and adding live
effects) in the AudioNode approach would not be difficult.  But voice
telephony applications involve more than just this and I'm not an expert in
this field.

I haven't considered it in very much detail, but think that because the
AudioNode approach is modular there could be some possible applications in
conjunction with full-duplex communication.  I can try to involve some
people from Google Talk in this discussion since I'm sure they would have
more insight.

I know that Stefan Håkansson brought this topic up on the list before:
http://lists.w3.org/Archives/Public/public-xg-audio/2010Jun/0087.html

And he has written about his own proposal:
https://labs.ericsson.com/blog/beyond-html5-full-duplex-conversational-voice-and-video-browsers-and-web-runtimes

I think that to a large extent the AudioNode-based web audio API I'm
proposing and a voice over IP API could be designed independently, but we
should be careful to consider any cases where the two would relate to one
another and make sure the APIs are designed well with this in mind.

Chris


On Wed, Sep 8, 2010 at 8:30 AM, Alistair MacDonald <al@bocoup.com> wrote:

> Hi Dave,
>
> That sounds like a great idea. Could you add that use-case to the Wiki with
> some detail on the input/output node re: echo-suppression?
>
> Chris Rogers, I am wondering if the behavior Dave is speaking of (combined
> input-output node) is something you have had a chance to consider yet in
> your work on the Webkit spec?
>
> Al
>
>
>
>
> On 09/06/2010 04:10 AM, dave penkler wrote:
>
>> Hi Al,
>> I was wondering whether we could consider adding a use case for voice
>> telephony in the "Interactive Audio" category. The idea would be to be able
>> to support a Voice over IP client directly in the browser without the need
>> for a plug-in. I would consider that the signaling part (use of SIP, XMPP
>> etc) is out of scope. In order to handle echo suppression we would possibly
>> need to add a requirement for a combined input-output node to ensure that
>> the time delay between input and output streams is not affected by
>> non-realtime scheduling in the JS runtime.
>> Thanks,
>> -Dave
>>
>>
>>
>>
>
> --
> Alistair MacDonald
> Bocoup, LLC
> http://bocoup.com
> +1-617-379-2752
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Received on Thursday, 9 September 2010 19:05:46 UTC

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