[opendtv] Re: Mobile DTV test

My post on history was an attempt to answer this post by you below about 
when equipment was available to check out the potential for COFDM use in 
the US and to compare the state of the art of COFDM to 8-VSB.

Broadcast networks using COFDM for audio (DAB) were already on the air 
in the UK and Sweden in 1994. These DAB networks could have been used 
for video if anyone wanted to do so. I think S. Korea is doing or about 
to do DAB mobile video. There was little difference between DAB and what 
was to become DVB-T. But there is no doubt that a lot could have been 
learned if any attention had been paid in those years. The DVB Group 
informally was already working with DAB and COFDM to broadcast DTV in 
1991.  The work on video, DVB-T, and audio, DAB, overlapped. There was 
equipment to test with and receivers to receive with early on. The first 
broadcast of DVB-T was in early 1995.

You mention "this component of the standard". What are you saying was 
missing as far as COFDM equipment for this testing? The only missing 
COFDM equipment for testing purposes that I know of was the supposed 
lack of 6 MHz COFDM receivers in the fall of 2000.  And this was not 
true since I had three different ones  and Pace offered to supply more. 
I know Nokia had 250 on hand in April of 2000 because I say them.

And the answer is that there was a lot of ways to, equipment for and 
people interested in helping to educate, test or demonstrate for 
whomever about COFDM from at least 1991 on.

The reality is no one wanted to know anything about it. They avoided it 
as when MIT set up a seminar specifically to inform and no one showed.

About the historical dates I believe mine are correct for official 
"first" OTA broadcast dates. WRAL on July 23rd 1996 and WHD-T on July 
30th 1996. yours are probably right also. Semantics.

COFDM and 8-VSB development overlapped. We should have been looking at 
COFDM from the beginning. You say I manipulated history. I don't think I 
did. You suggest there was no COFDM equipment to test with or against. I 
say there was.

Bob Miller



John Golitsis wrote:

>I love the way you manipulate history!  What about the fact that there was no
>COFDM equipment available when they were testing this component of the 
>standard?
>
>Was DVB-T even in the works when the decision on modulation was made in the 
>US??
>
>----- Original Message ----- 
>From: "Bob Miller" <bob@xxxxxxxxxx>
>  
>
>>It was because there were no royalty bucks for ATSC if they adopted
>>COFDM. Sorry.
>>
>>...and the lack of support from the DVB-T side.
>>    
>>
>
>  
>
 
 
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