4k TV on Freesat or Freeview?
On Monday, 3 August 2015 12:07:38 UTC+1, _Unknown_Freelancer_ wrote:
"Michael Chare" wrote in message
4K TVs are becoming available and more reasonable prices and there are
some 4k internet streaming channels.
So when, if ever, will any of the Freesat or Freeview channels convert to
4K ....over Freeview?
One hopes you are 'having a laugh'. Seriously.
Consider that this stuff originates at 12Gb/s.
Tweleve gigabits of data, per second.
In comparison, present HD originates at just under 1.5Gb/s.
And to compress this enough so that its transmittable over freeview, you
would have to dispense with so much information that you would render 'UHD'
i.e. The loss in quality would be so bad that it would be comparable to
existing HD. Therefore, just what is the point?
The only way to transmit 'acceptable' UHD is either usings serveral channel
spaces over satellite, or proper* broadband.
* meaning something better than BTs standard twisted pair phone line. Either
the co-ax that Virgin is installing, or fibre from both BT and Virgin.
4K over Freeview?
UHD is certainly no more than four times the bandwidth of 1080i, which is broadcast in the teens of Mbps (SD usually less than half that).
With more sophisticated compression BT expect to be able to get UHD down a 30-40Mbps pipe, which curiously enough is what you normally get from FTTC. This will also fit onto a single satellite transponder. These currently carry up to ten SD channels or two to three HD ones.
Different argument for Freeview, although Freeview HD looks good.