RTCP XR (continued 2)

RTCP XR

R factor	a voice quality metric describing the segment of the call that is carried over this RTP session, expressed as an integer in the range 0 to 100, with a value of 94 corresponding to "toll quality" and values of 50 or less regarded as unusable; consistent with ITU-T G.107 and ETSI TS 101 329-5
ext. R factor	a voice quality metric describing the segment of the call that is carried over an external network segment, for example a cellular network
MOS-LQ	estimated mean opinion score for listening quality (MOS-LQ) is a voice quality metric on a scale from 1 to 5, in which 5 represents excellent and 1 represents unacceptable
MOS-CQ	estimated mean opinion score for conversational quality (MOS-CQ) defined as including the effects of delay and other effects that would affect conversational quality
Gmin	gap threshold, the value used for this report block to determine if a gap exists
RX Config	PLC - packet loss concealment: Standard (11)/enhanced(10)/disabled (01)/ unspecified(00); JBA - Jitter Buffer Adaptive: Adaptive (11) / non-adaptive (10) / reserved (01)/ unknown (00). Jitter Buffer is adaptive then its size is being dynamically adjusted to deal with varying levels of jitter;JB Rate - Jitter Buffer Rate (0-15)
Jitter Buffer	nominal size in frames (8 bit)
Jitter Buffer Maximum	size in frames (8 bit)
Jitter Buffer Absolute Maximum	size in frames (8 bit)

Here after simply referred to as a binary fixed point number.
A burst is defined as a longest sequence of packets bounded by lost or discarded packets with the constraint that within a burst the number of successive packets that were received, and not discarded due to delay variation, is less than some value Gmin.

Transcript

[slide101] And today, of course, if you saw this morning's Metro, these portable speakers are a really hot item. I can put them in different places, but if I don't know how long their play-out time is, I can't manage to produce the sound field I want. There are loads of people using this for virtual reality. Because I can not only do that for the audio, but also for the video. That's right. Now we can even do it in these things that will modulate your skin surface. So you basically put on these clothes with little thingies inside them to stimulate your skin surface so you see, ah, there's the wave breaking and I feel the wind blowing past me. Immersive reality is a very, very hot area. But one of the hard problems is how can we do that at a distance? So how can I make it so that I can reach out and shake the other person's hand and feel it as if I'm gripping their hand, which of course you can do with inflatable bladders some various other sorts of techniques so that we have a collective immersive virtual reality experience. Of course there are various people who are interested in this, not only for the sex trade, and other kinds of things like that, but for businesses to avoid travel. Right? So one of the things that Telia is very proud of and has in their newsletters is, gee, despite the fact that we're this company with offices in Stockholm and Finland, we've reduced our corporate travel by this number of metric tons of carbon dioxide per year - it is of course because of virtual reality. So why do they need virtual reality? Well, if you have people logically sitting around a table and here's the person who's supposed to be, let's say they're in Singapore and here's the person in Helsinki and here's the person in Stockholm and here's the person in San Francisco, blah, blah. I want to have that spatialized experience. Why? So, when I'm sitting there, I can tell based in where the sound came from who said that? Otherwise I need a system that give me a label there, particularly if I don't know the people well. So getting all of these parameters, people think they can use them.