[opendtv] Re: Spectrum is too valuable

  • From: "John Shutt" <dmarc-noreply@xxxxxxxxxxxxx> (Redacted sender "shuttj" for DMARC)
  • To: <opendtv@xxxxxxxxxxxxx>
  • Date: Sat, 7 Nov 2015 23:16:22 -0500

Are we keeping in mind that because of the more benign RF environment, 6 MHz on a cable system can carry roughly twice the data payload that 6MHz OTA can?

----- Original Message ----- From: "Albert Manfredi" <albert.e.manfredi@xxxxxxxxxxx>
To: <opendtv@xxxxxxxxxxxxx>
Sent: Saturday, November 07, 2015 7:30 PM
Subject: [opendtv] Re: Spectrum is too valuable


Craig wrote:
I think you are under estimating the bandwidth needed per home; three HD
streams in 19 Mbps is clearly insufficient for MPEG-2, and on the low end for
h.264,

This is far from the truth, demonstrably, for MPEG-2 compression and certainly for H.264. There are several channels which transmit at the same time one HD and three, four, even five SD streams, MPEG-2 compression, in 6 MHz.




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