----- 适合多媒体会话协商的 SDP 手册:SIP 与 WebRTC IP 电话
This book on SDP is the first of this kind that attempts to put all SDP related RFCs together with their mandatory and optional texts in a chronological systematic way as if people can use a single uper-SDP RFCwith almost one-to-one integrity from beginning to end to see the big picture of SDP in addition to base SDP functionalities.
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