[opendtv] Re: Let them eat cake (and ATSC while they're at it)

  • From: <tjharvey@xxxxxxx>
  • To: <opendtv@xxxxxxxxxxxxx>,
  • Date: Mon, 16 May 2005 18:45:50 -0400

> "In Las Vegas, KFBT-DT (on Channel 29's)digital facility will transmit a 
> multiplexed 6 Mbps HDTV (720p) and signal a "live" 1.5 Mb/s SDTV (encoded 
> with TANDBERG hardware) of the KFBT on-air product. According to those close 
> to the demonstration, the 2-VSB datastream will have a total payload of 9 
> Mbps."
> COFDM and DVB-T could duplicate LINX's feat in 1999, with a much higher 
> payload.  Dream on.
That is not true. DVB-T could not deliver 9 Mb/s without a substantial increase 
in transmitter power. And at 9 Mb/s the transmission robustness would be 
substatially reduced. At best it would be a toss up and due to COFDM 
inefficient use of bandwidth, 2VSB would likely be superior.

Remember at that time (1999) DVB-T diversity reception and hierarchal 
modulation were still only a dream. So dream on.

Terry Harvey

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