30 Mbps is a bit of a low estimate for T2. Wikipedia suggests at least 35.
2009/9/18 Brian Butterworth <[email protected]> > Briefly, DVB-T2 uses MPEG4 delivered in a 30Mbps (compare 18Mbps and 24Mps) > multiplex using 256QAM (compared with 16QAM and 64QAM) with LDPC/BCH error > correction (not FEC) and 32k carriers (compare 2k and 8k). > http://www.ukfree.tv/fullstory.php?storyid=1107051377 > > Basically, this is not a software upgrade! > > 2009/9/17 Brendan Quinn <[email protected]> > > Alan wrote: >> > I assume my topfield HD will be out of date with these proposed >> > changes? >> >> Ant replied: >> > You'll need to retune, but the services you currently get on Freeview >> > should still be available. Think of Freeview + as an optional >> > upgrade. >> >> To which Alun wrote: >> > I meant in terms of the HD element if they are changing the spec? If >> there is a >> > decryption requirement I doubt the Topfield will have it? >> >> I would say you're right, your box wont' receive HD freeview signals. >> But that's not (only) because of any encryption, it's because the spec >> for encoding HD over freeview [1] was only agreed last week and the >> first box was announced five days ago, to be released "in the first half >> of 2010": >> >> http://www.broadbandtvnews.com/2009/09/12/pace-unveils-dvb-t2-freeview-h >> d-box/<http://www.broadbandtvnews.com/2009/09/12/pace-unveils-dvb-t2-freeview-h%0Ad-box/> >> >> I guess you have this box [2]: >> >> http://www.topfield.co.uk/index.php?option=com_content&view=article&id=1 >> 0&catid=2&Itemid=3<http://www.topfield.co.uk/index.php?option=com_content&view=article&id=1%0A0&catid=2&Itemid=3> >> >> It uses "HDMI upscaling" to work with your HD TV. But it's not actually >> processing the real freeview HD signal and never can -- your box needs >> different chips to be able to do that. So to actually see Freeview HD in >> HD, you will need to buy a new box :-( >> >> HTH, >> >> Brendan. >> [1] known as DVB-T2. The DVB are the standards committee for most TV >> standards in Europe, India, Australia etc. The BBC is a member. DVB-T >> was the standard for regular freeview, so DVB-T2 is the standard for >> next-gen freeview: the "T" is for terrestrial. You can guess that DVB-C >> is for cable and DVB-S is for satellite... They also have C2 and S2 >> standards for HD over those platforms. >> [2] URL edited for brevity -- yes it was much longer than that before -- >> but it seems to work... >> >> - >> Sent via the backstage.bbc.co.uk discussion group. To unsubscribe, >> please visit >> http://backstage.bbc.co.uk/archives/2005/01/mailing_list.html. >> Unofficial list archive: >> http://www.mail-archive.com/[email protected]/ >> > > > > -- > > Brian Butterworth > > follow me on twitter: http://twitter.com/briantist > web: http://www.ukfree.tv - independent digital television and switchover > advice, since 2002 > -- Simon Thompson GMAIL Account
