Difference between revisions of "RTPAUDIOQOS Demystified"
| Line 1: | Line 1: | ||
*Our Receiver | *Our Receiver | ||
** ssrc | ** '''ssrc''' - our ssrc | ||
** rxcount | ** '''rxcount''' - no. received packets/Received packets | ||
** lp | ** '''lp''' - lost packets/Lost packets | ||
** rxjitter | ** '''rxjitter''' - our calculated jitter(rx)/Jitter | ||
* Our Sender | * Our Sender | ||
** themssrc | ** '''themssrc''' - their ssrc | ||
** txcount | ** '''txcount''' - transmitted packets/Sent packet | ||
** rlp | ** '''rlp''' - remote lost packets/Lost packets | ||
** txjitter | ** '''txjitter''' - reported jitter of the other end/Jitter | ||
** rtt | ** '''rtt''' - round trip time/RTT | ||
Revision as of 08:06, 22 September 2009
- Our Receiver
- ssrc - our ssrc
- rxcount - no. received packets/Received packets
- lp - lost packets/Lost packets
- rxjitter - our calculated jitter(rx)/Jitter
- Our Sender
- themssrc - their ssrc
- txcount - transmitted packets/Sent packet
- rlp - remote lost packets/Lost packets
- txjitter - reported jitter of the other end/Jitter
- rtt - round trip time/RTT
Synchronization source (SSRC)
The source of a stream of RTP packets, identified by a 32-bit numeric SSRC identifier carried in the RTP header so as not to be dependent upon the network address. All packets from a synchronization source form part of the same timing and sequence number space, so a receiver groups packets by synchronization source for playback. Examples of synchronization sources include the sender of a stream of packets derived from a signal source such as a microphone or a camera, or an RTP mixer (see below). A synchronization source may change its data format, e.g., audio encoding, over time. The SSRC identifier is a randomly chosen value meant to be globally unique within a particular RTP session (see Section 8). A participant need not use the same SSRC identifier for all the RTP sessions in a multimedia session; the binding of the SSRC identifiers is provided through RTCP (see Section 6.5.1). If a participant generates multiple streams in one RTP session, for example from separate video cameras, each MUST be identified as a different SSRC.
