Sequence Number
2 bit Sequence Number field
Incremented in a modulo 4 fashion for each mini-packet sent
- No change in sequence number when nothing is sent
Used to detect mini-packet loss per channel
- Proper timing at the playout buffer can be maintained
- Receiver can trigger loss concealment methods
Consecutive loss of more than 4 audio frames, in general, causes receiver re-alignment
- Refill the playout buffer for the anticipated level of jitter