1. SDP Media Loopback draft-hedayat-media-loopback-01.txt
Kaynam Hedayat
MMUSIC WG November 2004

2. Summary of Draft
Main Goal: Enable SIP Endpoints to Initiate Calls with Media Loopback
Introduce Two SDP Media Attributes
Type of loopback
Mode of Loopback
Based on the Offer/Answer Model
Reporting of Metrics via RTCP & RTCP-XR
Define RTP/RTCP Requirements

3. SDP Attributes Loopback Type Loopback Mode Property Media Attribute
a=loopback:<loopback-type>
rtp-pkt-loopback
rtp-media-loopback
Loopback Mode
Value Media Attribute
a=<loopback-mode>
loopback-source
loopback-mirror

4. RTP/RTCP Requirements
Define RTP Header Generation for Each Loopback Mode
RTCP
Endpoints MUST support RTCP and RTCP-XR
RTCP-XR Statistics and VoIP Metric Report Blocks

5. Loopback Modes Loopback Modes Packet Loopback Media Loopback
CODEC
Jitter Buffer
Media Loopback
Loopback Modes
Packet Loopback
Media Loopback