- From: Cullen Jennings <fluffy@cisco.com>
- Date: Wed, 19 Oct 2011 18:45:57 -0600
- To: Stefan Håkansson <stefan.lk.hakansson@ericsson.com>
- Cc: public-audio@w3.org, "public-webrtc@w3.org" <public-webrtc@w3.org>
On Oct 6, 2011, at 1:25 , Stefan Håkansson wrote: > Dear Audio WG (cc webrtc), > > in the latest version of the use-cases - and - requirements document (<http://datatracker.ietf.org/doc/draft-ietf-rtcweb-use-cases-and-requirements/?include_text=1>) for webrtc the requirements on audio processing have been changed: > > ---------------------------------------------------------------- > > A13 The Web API MUST provide means for the web > application to apply spatialization effects to > audio streams. I hope this is a requirement on some API other than the one WebRTC is doing. > ---------------------------------------------------------------- > A14 The Web API MUST provide means for the web > application to detect the level in audio > streams. agree > ---------------------------------------------------------------- > A15 The Web API MUST provide means for the web > application to adjust the level in audio > streams. I'd prefer that the requirement was that it needed to be able to tell it to be normalized. What I don't want to see is a the only thing the JS gets is a gain control - that will be very hard to use. > ---------------------------------------------------------------- > > A16 The Web API MUST provide means for the web > application to mix audio streams. Again, hope that is some other API than one WebRTC is going. Be nice to say more about the scope of this mixing. > ---------------------------------------------------------------- > > The term "audio stream" was selected at an early stage; I would say it corresponds a "Track" in the MediaStream object that is currently in the API draft (<http://dev.w3.org/2011/webrtc/editor/webrtc-20111004.html>). > > Anyway, feedback on these requirements is welcome (I'm not sure I'm using good wording). > > A14 and A15 are in the use-cases motivated by the need to equalize levels between audio streams (Tracks) coming from different participants in a multiparty session. > But I can see other uses of A14: display the level in a meter locally to calibrate mic settings before a session, detect silence, detect noise generating party in a multiparty session etc. > > As said, > feedback would be appreciated. > > Stefan > >
Received on Thursday, 20 October 2011 00:46:36 UTC