[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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