Wikipedia is wrong (that's a suprise). The carrying capacity is 30Mbps, according to the specification.
2009/9/18 Simon Thompson <[email protected]> > 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 I assume my topfield HD will be out of date with these proposed 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 > -- Brian Butterworth follow me on twitter: http://twitter.com/briantist web: http://www.ukfree.tv - independent digital television and switchover advice, since 2002
