[mythtvnz] Question about quality from satellite

[David Moore]

On 13/07/2013, at 5:40 PM, Stephen Worthington <stephen_agent at jsw.gen.nz> wrote:

> On Sat, 13 Jul 2013 08:00:28 +1200, you wrote:
> 
>> On 12/07/2013 22:24, ajp at cantabrian.co.nz wrote:
>>> 
>>> Hi,
>>> 
>>> I have recently upgraded my frontend with it now capable of full HD 
>>> and it's great.
>>> 
>>> I only record satellite in and it seems some recordings appear to be 
>>> higher resolution or better quality than others. I am kinda theorizing 
>>> that the good recordings are ones that are actually going out to 
>>> terrestrial as full HD and obviously scaled back to SD because we 
>>> don't do DVB-S2 yet -- but it's just a theory J
>>> 
>>> Anyone know any more or have any pet theories like I'm imagining it J
>>> 
>>> Thanks
>>> 
>>> 
>>> 
>>> _______________________________________________
>>> mythtvnz mailing list
>>> mythtvnz at lists.linuxnut.co.nz
>>> http://lists.ourshack.com/mailman/listinfo/mythtvnz
>>> Archives http://www.gossamer-threads.com/lists/mythtv/mythtvnz/
>> Quite correct - Sat. here is 720p while terrestrial is 1080(i - I think).
>> 
>> I can see the differance and it's quite annoying since my "system" was 
>> configure for DVB-T, but we moved into a rental that had Sky and very 
>> bad analog....
>> 
>> If you want that in writing, google "Optus D1" :)
> 
> Some Sky channels are HD if you pay them extra for an "HD ticket".  I
> am not sure of the exact format used as I do not pay Sky extra for
> that, but they are broadcast on DVB-S2 transponders rather than DVB-S.
> But the rest of the Sky channels are SD and MPEG2 video rather than
> the much better H.264 video used on DVB-T.  They are definitely not
> 720p = 1280x720 - the ones I watch are mostly 576i = 720x576
> interlaced, or 704x576 interlaced.  720p is the lowest format
> considered to be HD, although a lot of 720p broadcast programmes are
> not actually HD - the source programmes have too low a bit rate.
> 
> On DVB-T, TV One and TV2 are 720p.  TV3 is 1080i = 1920x1080 but
> interlaced ie half the resolution of 1080p. 

I think TV 1, 2, 3 are all 1080i now. I suppose the bit rate on 1 and 2 will be less than 3.