Solomon,
This is where thorough research is required. Both have some pros and cons. ISDB-T brings with it advantages of ISDN to your TV.
By comparison, ISDB-T is to CDMA, what DVB-T is to GSM. CDMA came 10 years later than GSM, and proved to use radio resources better.
Japan, North And South America enjoy better CDMA services than what GSM provides. Same applies to ISDB.
The pros and cons of either system are more to do with the operators equipment than the consumer. Consumers will mostly feel the difference in costs of the set top boxes than anything else.
Let me summarise:
DVB can transmit digital siganls encoded in MPEG2/MPEG4 using cable(DVB-C), satellite(DVB-S), terrestial(DVB-T) or handheld (DVB-H) and is in Europe, Australia, South-Africa and India.
Advantages of DVB:
- Can freely change applied modulation techniques.
Disadvantages:
- Despite modulation techniques its not as robust i.e. error correction is weaker. A little interference leads to "no signal" errors,etc.
- Power consumption of the transmission equipment is high.
- Not very portable.I've experienced this using the DSTv Mobile, signal lost when moving above 10KPH.

Integrated Services Digital Broadcasting (ISDB) can transmit signals in cable, terrestial and satellite as well. Used in Japan and S.America
Advantages:
– Errorcorrection-techniques, modulationschems are all dynamically changeable and can be different   for each segment => robustness
- Biggest advantage : 3 signals possible at same time.
- ISDB allows HDTV on moving vehicles (100km/h), allows reception by portable narrowband receiver.

Disadvantages:
 - ISDB requires most expensive receivers but on other hand, best portability and mobility.

Odhis,
Yes.ISDB and DVB require different types of set top boxes.

My take on all this:

I find the timing of the brazilian president's visit suspect. Brazil is a major manufacturer of ISDB transmission equipment and set top boxes and given the controversy brewing in his own country over digital Tv(http://tinyurl.com/3xbq6jy), its quite understandable why he would try to convince the govt otherwise. At one time, they even tried creating their own standard.
My suggestion : The ministry can give ISDB a go but on a very small scheme and still keep dvb-t.

One good thing about living in Africa is that technology is normally mature, tried and tested in other markets before reaching here. This is the time for the ministry to do thorough research and learn from other markets as much as possible.

Regards,
Bernard



On Fri, Jul 16, 2010 at 10:07 PM, Solomon Mburu Kamau <solo.mburu@gmail.com> wrote:
On 16/07/2010, Odhiambo Washington <odhiambo@gmail.com> wrote:
> On Fri, Jul 16, 2010 at 10:41 AM, Bernard Mwagiru <bmwagiru@gmail.com>wrote:
>
>> ISDB-T does have benefits just like ISDN did for telecoms.It was developed
>> in Japan.It basically involves that is the next stage of communication
>> where
>> you have radio,tv,internet and phone on one channel.The initial costs are
>> very expensive but the consumer benefits in the long run.Those who have
>> the
>> money to go in of ISDN would and those who don't will stick to
>> dvb-t.Eventually all roads are leading to integrated Services Digital
>> Networks.You must know,HD was in existence about 15yrs ago in Japan.Its
>> now
>> we are accepting it and now enjoying its benefits.
>>
>> The hue and cry here is due to the STBs already in the market and the
>> investments the govt has already made.It would bring confusion if both
>> services are run concurrently. So the govt has to make a decision first
>> and
>> fast on which way we need to go.
>> Attached see the distribution of DTT systems.
>>
>> ./bernard
>>
>>
> Bernard,
>
> Would accepting ISDB-T mean that all the digital broadcast equipment already
> installed be changed???
>
>
Seriously, can this be simplified for a common man like me to grasp?
What are the benefits ( and cons) of the Brazilian idea to the one
already in place?
>From the BD article, it's imperative that the deal is already sealed,
as Dr. Ndemo has said. So this means we are now going to start the
process all over again? Or the consumer is given an opportunity to go
the Brazilian way or the already invested in one?

Suppose another country comes up with yet another different approach
of the same and come throw a party at us, will that change the cause
of the river?

Remember, Kenya has had many suitors of late (Brazil, the 'NKOTB',
China, Iran etc) and all are throwing goodies around.

Regards,


>


> --
> Best regards,
> Odhiambo WASHINGTON,
> Nairobi,KE
> +254733744121/+254722743223
> _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
> "If you have nothing good to say about someone, just shut up!."
>                -- Lucky Dube
>


--
Solomon Mbũrũ Kamau

*****************************************************
Man is a gregarious animal and enjoys agreement as cows will graze all
the same way to the side of a hill!

AND

It is better to die in dignity than in the ignomity of ambiguous generosity!

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