
On Thu, Nov 18, 2010 at 10:25 PM, Bernard Mwagiru <bmwagiru@gmail.com>wrote:
DTT technologies are about how efficiently bandwidth can be optimized. Both ISDB-T and DVB-T support the transmission of the same broadcast all over a given territory on the same assigned radio channel. This maximizes the efficiency of radio channels used - although this advantage has been more of a test-bed curiosity than a practical form of deployment thus far. ISDB-T can transmit a HDTV channel and a mobile phone channel with a channel of 6MHz bandwidth. ISDB-T can change to two or three SDTV channels instead of one HDTV channel. Combination of these services can be changed anytime. ISDB-T provides interactive services with data broadcasting. ISDB-T supports the internet access that work in collaboration with the data broadcasting. And the internet access is also provided on mobile phone. ISDB-T provides robustness to multipath (Ghost) interference. ISDB-T provides robustness to co-channel analog television interference. ISDB-T provides robustness to impulse noises that come down from motor cycles and power lines in urban city.
DVB-T also shares some most of the above features apart from the interactiveness and internet access. In Kenya we use both DVB-T Mpeg 2 offering Freeview Channels and also DVB-T mpeg 4 which hosts all local station under Signet. Advantages of MPEG-4 over MPEG-2 are pretty obvious. But what advantages brings us DVB-T2? The DVB-T2 standard was finalized in June 2008. It brings us many improvements and features that increase capacity and robustness of the transmission channel.UK was one of the first countries that started using DVB-T back in 1997. Introduction of HDTV will bring two advanced technologies: DVB-T2 as transmission standard and MPEG-4 as coding standard. In general, DVB-T2 offers around 50% increase in capacity over DVB-T. DVB-T2 together with MPEG-4 form an advanced system for digital terrestrial television broadcasting. It is very likely that this combination will be widely used in the future and it will not be superseded with some even more advanced technology for years. However, the fact is that we live in a world full of surprises....and uncertainty...which is why the earlier the govt make the switch, the better it is for consumers...
Bernard
On Thu, Nov 18, 2010 at 7:34 PM, Brian L <lusiola@gmail.com> wrote:
On Thu, Nov 18, 2010 at 5:18 PM, Bernard Mwagiru <bmwagiru@gmail.com>wrote:
Ok, thats good to know but I once saw one at a friend's place;the picture had small distinct lines cross from right to left on the screen....or perhaps it was the telly's problem...
On Thu, Nov 18, 2010 at 5:15 PM, mash lists <mashlists@gmail.com> wrote:
Yeah, I've seen one in our office that has a slot for the smart card.
On 18 November 2010 17:13, Bernard Mwagiru <bmwagiru@gmail.com> wrote:
From the grapevine, there's a new Digital Terestial Transmission(DTT) company in Nairobi called Smart TV which is soon to roll out their Pay TV package which will comprise some of TOPTV SA channels like Sliver and Show time. They've been running some test signals from Signet....Now, this brings up another issue, for pay-tv, some form of subscription using Conditional Access smart cards will be required. Do those Star set-top boxes have any provision for smart card use?
Bernard
On Thu, Nov 18, 2010 at 5:05 PM, Bernard Mwagiru <bmwagiru@gmail.com>wrote:
Hey guys, Just sold the last piece to Wilson.
The biggest problem I have with Digital TV regulators and Signet is that they seem not to be clear on which direction/transmission they are willing to take. Brazil even sent there prezzy to try and lure Kenya towards ISDB-T and now there's talk of DVB-T2. Some ppl have even started experiencing issues with Star Set-top boxes, probably because they might not be compatible with whatever compression method Signet are playing around with,etc..etc.. And once you choose a transmission standard you don't change that decision for quite some time. Transmission standard for digital broadcasting is one of the basic properties that defines the equipment (transmitters and receivers) that can be used in specific country. Changing the transmission standard means replacing receivers and transmitters (at least the modulator) with new devices. DVB-T is actually an upgrade and is backward compatible.It is currently broadcasting in parts of the UK under the brand name Freeview HD. The standards are mostly about how much can be transmitted in a given bandwidth. And no...I dont know whether the set-top box I have is DVB-T2 compliant or not.What I do know is that when Signet start transmitting HD signals, they'll probably use DVB-T2 and none of those Star models will receive....
If someone knows a techie from KBC/Signet, please introduce him to Skunkworks....He will have a ton of queries to answer....
Cheers!
Bernard
On Thu, Nov 18, 2010 at 4:33 PM, mash lists <mashlists@gmail.com>wrote:
> Thuo, I also want the contacts. Looks like China will be taking over > almost everything. > > > On 18 November 2010 16:03, Anthony Lenya <tlensya@gmail.com> wrote: > >> hapo sawa! >> >> Thanx mara hiyo hiyo! >> >> On Thu, Nov 18, 2010 at 4:01 PM, Tony Likhanga <tlikhanga@gmail.com> >> wrote: >> > Ditto above. >> > >> > Anyone knows where I can get a DVB-T2 decoder? The one that's >> still under >> > test in some parts of Europe. >> > _______________________________________________ >> > Skunkworks mailing list >> > Skunkworks@lists.my.co.ke >> > http://lists.my.co.ke/cgi-bin/mailman/listinfo/skunkworks >> > ------------ >> > Skunkworks Rules >> > http://my.co.ke/phpbb/viewtopic.php?f=24&t=94 >> > ------------ >> > Other services @ http://my.co.ke >> > >> _______________________________________________ >> Skunkworks mailing list >> Skunkworks@lists.my.co.ke >> http://lists.my.co.ke/cgi-bin/mailman/listinfo/skunkworks >> ------------ >> Skunkworks Rules >> http://my.co.ke/phpbb/viewtopic.php?f=24&t=94 >> ------------ >> Other services @ http://my.co.ke >> > > > _______________________________________________ > Skunkworks mailing list > Skunkworks@lists.my.co.ke > http://lists.my.co.ke/cgi-bin/mailman/listinfo/skunkworks > ------------ > Skunkworks Rules > http://my.co.ke/phpbb/viewtopic.php?f=24&t=94 > ------------ > Other services @ http://my.co.ke >
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Bernard,
Its not only our beloved Kenya. South Africa seems to be experiencing the same pressure from Brazil & Japan. Its a wait & see time, because if South Africa go ISDB the entire SADC region might go the same way and influence us as well. Haven't read much about it but what are the major differences and pros and cons of each standard?
Kind regards -- Lusiola Brian |3 R 1 /-\ |\|
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@Bernard a) So if I read this right, essentially ISDB-T has more to offer than the DVB-T current implementation standard? b) Can ISDB-T offer triple play natively as is? I know that to switch standards now would be costly but if b) above is true wouldn't we be in a better situation in the long run. I know the cost of ISDB-T end-user equipment is quite expensive at the moment, but if SADC & Eastern Africa adopt it, the cost would definetly go lower? Is there anyone(country) pushing for DVB-T? If so what do they have to gain from it. Regards, -- Lusiola Brian |3 R 1 /-\ |\|