[opendtv] Re: Let them eat cake (and ATSC while they're at it)
- From: Bob Miller <bob@xxxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Mon, 16 May 2005 15:36:07 -0400
Doug McDonald wrote:
>John Shutt wrote:
>
>
>
>>I take that as a "no."
>>
>>'Nuff said.
>>
>>----- Original Message -----
>>From: "Manfredi, Albert E" <albert.e.manfredi@xxxxxxxxxx>
>>To: "OpenDTV (E-mail)" <opendtv@xxxxxxxxxxxxx>
>>Sent: Monday, May 16, 2005 2:20 PM
>>Subject: [opendtv] Re: Let them eat cake (and ATSC while they're at it)
>>
>>
>>
>>
>>
>>>John Shutt wrote:
>>>
>>>
>>>
>>>
>>>>A simple yes or no: Have you watched the Bob Miller
>>>>video?
>>>>
>>>>
>
>
>I have watched the whole thing, twice. And yes, it appears that only the
>diversity receiver worked. I don't object to that, we all
>agree that mobile is difficult.
>
>
As I said before the non diversity with a 100 Watt transmitter and no
SFN was TRULY INCREDIBLE. It worked very well. We would consider doing
non SFN and non diversity and believe even then we would have an
acceptable offering at decent bit rates. But we don't have to do that.
We can do both diversity broadcast and reception. They will do that in
Japan even with cell phones and presumably a better modulation. Then
there is DMB-T which claims to be far better than DVB-T or ISDB-T for
mobile. Our little test in NYC with DVB-T is not what would be deployed
today.
You cannot judge what a network would look like based on this test we
did. A bit of extrapolation is in order. But for what it was it is
amazing. We know that we can build such a network at over 18 Mbps that
will work flawlessly mobile or fixed.
>We also remember the hype from the Far East with their SFN and TV on busses:
>they had to go to much higher powers
>to make it work, if I recall right. And this for one teensy country.
>
>Nobody doubts that COFDM will work mobile at a low enough bitrate, enough
>power, enough SFN transmitters, etc.
>It will even work to cover large areas if you have three times the power, per
>bitrate, as ATSC.
>
I will match ATSC at the same power level any day in any coverage area.
>
>The purpose of OTA digital TV in the USA is HDTV, not mobile.
>
>
The purpose of OTA is for viewers first to receive a signal. The market
should determine the resolution of the video. That is the way the law
reads and that is the way it will play out.
Bob Miller
>Doug McDonald
>
>
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