sd pq quality on cable?

[Will 44]

Didn't really know where to post this so I'll try it here, is the pq quality better on cable or sky?

[gadjetnige]

I have just had cable installed and still have the sky+ box installed, so I am able to do a direct comparison between the 2. The cable is markedly better than the Sky, some channels better than others. My son is watching Ghostbusters 2 know on SKY one (through cable) as I'm typing this. The picture is very crisp and the colours much brighter on the cable feed.It really is very good. I have a Sharp 42'' 1080p screen. The cable is connected by HDMI and the Sky through RGB scart.
Regards Nige.:thumbsup:

[scottydog1234]

Thats not a fair comparison if your cable box is connected thru hdmi and sky only through rgb scart :thumbsdow

[RaptorUK]

Thats not a fair comparison if your cable box is connected thru hdmi and sky only through rgb scart :thumbsdow

And why does that make a difference when both pictures are SD ? Can you explain ?

[Saldawop]

Well I suppose if you want to do a fair comparison you would need to compare standard SKY to standard Cable box.
If you are comparing V+ to normal SKY then the PQ is *much* better through Cable. Have never seen SKY HD so cannot comment.

[Chris Muriel]

And why does that make a difference when both pictures are SD ? Can you explain ?


Because (assuming the display has HDMI input), there will be two less stages of data conversion using HDMI whereas using RGB requires digital to analogue conversion in the STB and A to D conversion in the display unit ; there will be some linearity errors and quantisation noise produced by those coonversion processes.

Chris Muriel, Manchester