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Some comments//Re: New version of editor draft for webrtc

From: Wangyahui <yahui.wang@huawei.com>
Date: Mon, 24 Sep 2012 01:49:36 +0000
To: "public-webrtc@w3.org" <public-webrtc@w3.org>
Message-ID: <034C870DB898BE43B5787C7A79107CD93BE8A59E@SZXEML503-MBS.china.huawei.com>
Hi, all
I am new to WebRTC, and begin with initial study of WebRTC 1.0 specificationhttp://dev.w3.org/2011/webrtc/editor/webrtc.html.

There are some problems I encountered while reading this spec. I would appreciate it if you could reply.

1£®¡°discard¡± means that codecs can abandon some channels? Or maybe it should be ¡°decode¡± by mistake?
Location: ¡°4.1 Introduction¡±, the third paragraph and last sentence. ¡°All of the channels that a codec needs to encode jointly MUST be in the same MediaStreamTrack and the codecs SHOULD be able to encode, or discard, all the channels in the track.¡±
2£®I saw (1) and (3) in this specification, but I didn¡¯t find any link or reference. Besides, there is no (2), but many (3) following¡± RTCPeerConnection readiness state<http://dev.w3.org/2011/webrtc/editor/webrtc.html> is closed¡±.
Location1: ¡°4.2.2 MediaStreamTrack¡±, the third paragraph. ¡°A track in a MediaStream , received with a RTCPeerConnection , MUST have its readyState attribute [GETUSERMEDIA] set to muted (1) until media data arrives.¡±
Location2: ¡°5. Peer-to-peer connections¡± under¡±NOTE¡± step 4. ¡°If the connection¡¯s RTCPeerConnection readiness state is closed (3), abort these steps¡±
3. Step 12 of ¡°Simple Call Flow¡± is addStream(data), but as I know the parameter of addStream(MediaStream stream) is for audio/video not data. By the way, is it possible to add some descriptions for steps of the flow charts?
Location: ¡°9. Call Flow Browser to Browser¡±, ¡°10. Call Flow Browser to MCU¡±

In addition, some revisions for editorial errors are attached for your information. Thank you for checking it.

Best Regards,

Yahui
-----------------------------------------------------------------------------------------------------------------------------------------
Yahui Wang
Device Standards & Patents Dept
Huawei Technologies Co., Ltd.
Addr: Huawei Building, No.156 Beiqing Rd. Z-park, Shi-Chuang-Ke-Ji-Shi-Fan-Yuan,
Hai-Dian District, Beijing 100095, P.R. China
Phone: +86 10 60613252
Mobile£º+86 13522157152
Email:yahui.wang@huawei.com
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Received on Monday, 24 September 2012 07:58:58 GMT

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