[opendtv] Re: 1-seg
- From: "John Willkie" <johnwillkie@xxxxxxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Sun, 11 Jan 2009 17:07:49 -0800
? so, somehow something that is 1) unsuccessful, 2) costs money, 3)has no
local or day-and-date network content and which 4)nobody currently uses has
a head start on something that 1) can or will be free, 2)will have local,
some network and perhaps even live sports [the latter, possibly even free]?
We've been through this before, Tom. You pay -- atop your monthly voice
plan -- for a data plan that few people use, and those that do use it for
business.
The churn rate for mobile video offered by cell carriers is close to 100%
once you start charging. The new adopters all believe that tv should be
free.
However, the way to offer a viable service isn't "how little bandwidth can 1
station devote to this?"
Municipal wi-fi, to the extent it ever existed, died about two years ago.
Unicast data plans can never compete with multicast using broadcast
facilities.
Must be some good stuff a-smoking thereabouts.
John Willkie
-----Mensaje original-----
De: opendtv-bounce@xxxxxxxxxxxxx [mailto:opendtv-bounce@xxxxxxxxxxxxx] En
nombre de Tom Barry
Enviado el: Sunday, January 11, 2009 4:48 PM
Para: opendtv@xxxxxxxxxxxxx
Asunto: [opendtv] Re: 1-seg
Really the open question for me on mobile is whether they will get it
together for OTA mobile broadcast before it is simply locked up by
cellular IP like my Sprint phone. Getting 415 kbps is already no
problem with my current phone service but I'm not paying (yet?) for any
premium channels.
Municipal wifi probably could do even better if that ever comes about.
I wonder if any buses or trains have wifi yet? Might become needed if
gas goes to $10 / gallon.
- Tom
Bob Miller wrote:
> There is some market in Europe for cell phones that receive ordinary
> DVB-T also.
>
> Bob Miller
>
> On Sun, Jan 11, 2009 at 11:55 AM, Tom Barry <trbarry@xxxxxxxxxxx> wrote:
>> Interesting. I found there is a Wikipedia article on 1-seg
>> <http://en.wikipedia.org/wiki/1seg>
>>
>> That link states they break a 6 mhz channel into 13 segments that after
2/3
>> FEC each carry a usable payload of 415 kbps. The max video rez is
320x240,
>> at video bit rates of 220-320 kbps.
>>
>> On usage:
>>
>> "On 2008-01-16, JEITA learned that the result of their monthly shipping
out
>> quantity survey showed approx. 4.806 million mobile phones were sold in
>> Japan in November 2007. Of these, approx. 3.054 million phones, 63.5% of
the
>> total, can receive 1seg broadcasts. [2]
>>
>> In fiscal year 2007, total average 45.0% of mobile phone has 1seg
reception
>> capability out of 22.284 million units sold, the percent has been
increased
>> 26.8% in April 2007 to 64.2% at end of fiscal year March 2008."
>>
>> I wonder if the phone companies charge extra (monthly) for this feature?
>>
>> Having 63% of new phones being able to receive 1-seg would seem to be
>> something of a winner there, even if it is a lower bit rate and
resolution
>> than I would personally like.
>>
>> - Tom
>>
>>
>> Craig Birkmaier wrote:
>>> At 10:35 AM -0500 1/10/09, Tom Barry wrote:
>>>> Craig Birkmaier wrote:
>>>> ...
>>>>> And to save you a reply, This one DIDN'T work...
>>>>>
>>>>> Craig
>>>> It occurs to me I have not been keeping up with what the rest of the
>>>> world is doing in mobile, especially broadcast. Has any country
implemented
>>>> a working land based mobile/hand-held broadcast TV system yet, with any
>>>> technology? If so, what are they using?
>>>>
>>> The most successful land-based mobile TV broadcast service is in Japan,
>>> which is using the ISDB standard; the mobile service is called 1-seg. I
>>> believe that the government mandates that the mobile 1-Seg service
>>> simulcasts the programming carried on the full bandwidth ISDB service
for
>>> fixed receivers. In February the installed base of phones with 1-seg
>>> capabilities in Japan passed the 20 million mark - I can't find anything
>>> more recent in terms of numbers.
>>>
>>> The satellite based mobile TV service in Korea is also highly popular.
>>>
>>> Regards
>>> Craig
>>>
>>>
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>
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