| ??? 01/31/10 15:04 Read: times |
#172807 - UDP? Responding to: ???'s previous message |
Richard Erlacher said:
Packets don't always arrive at regular intervals, and often arrive out of order. To minimise overheads, I think these things tend to use UDP - which means that the packets might not even arrive at all! In order to compensate for the random variation in packet arrival times, it requires a very large (deep) buffer. But too much buffering leads to unacceptable delays - so there's only so far you can go with that. If the buffer in this gadget is a bit too small, then the effects described are likely. As noted here, these effects are typical of digital media in general and IP Telephony in particular: they're fine as far as the buffering, error-correction, etc can cope - but, once you get past that limit, they become virtually unusable. |
