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455 posts

Ultimate Geek
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Topic # 112444 9-Dec-2012 09:39 Send private message

The Freeview picture quality seems way better and the sound is in another league altogether. Sky seems so heavily compressed it's sometimes like watching YouTube. I know not all content is HD but I'm talking about stuff like the 6 o'clock news.

I'm watching terrestrial FV on a freeview enabled 32in TV and sky through mysky HDi & HDMI.




TV: Sony Bravia KDL324000. Freeview|HD
PC: ASUS P8P67 Pro B3, intel i5, 8Gb RAM, 120Gb SSD, Win 7
HTPC: Antec NSK2480B case, AMD A4-5300 CPU, Asus F2A85-M LE mobo, WD Caviar Green 64Mb 2TB HDD, HD Homerun, Win7 Home Premium, RAM 1600Mhz 4Gb.
Laptop: Sony VAIO VGN-CS16G
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386 posts

Ultimate Geek
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  Reply # 729194 9-Dec-2012 09:52 Send private message

Do you pay sky each month for the "HD ticket"?

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Uber Geek
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  Reply # 729195 9-Dec-2012 09:59 Send private message

Hi, all HD channels are 1080i, I dont believe TV1/2 are compressed any more or less than on FV, the news out of Hobson St is all SD so I would not expect it to look HD, because its not.

The Sports and Movie channels are quite good from an HD perspective in my opinion.

Cyril

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  Reply # 729197 9-Dec-2012 10:02 Send private message

The news on both TV1 and TV3 is only SD. Both also tend to have terrible issues with artifacts on many cameras, particularly with low bitrate outside broadcasts.

73 posts

Master Geek


  Reply # 729795 10-Dec-2012 14:05 Send private message


I have Sky HD and a Full HD TV and indeed news looks like "crud vision"
Whereas my darling has freeview HD and in a very unscientific way it looks heaps better than Sky's "version"

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  Reply # 729808 10-Dec-2012 14:21 Send private message

Duffuss:
I have Sky HD and a Full HD TV and indeed news looks like "crud vision"
Whereas my darling has freeview HD and in a very unscientific way it looks heaps better than Sky's "version"


Both use the exact same upscaled 576 -> 1080i feed, the only difference in the broadcast is in the bitrate.

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Uber Geek
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  Reply # 729809 10-Dec-2012 14:22 Send private message

I upgraded to a 55" Samsung LED TV yesterday, can def notice all the compression used on Sky SD, noticed 3news (TV3 HD) was showing signs of compression too

Awesome
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  Reply # 729811 10-Dec-2012 14:30 Send private message

I always found the Sky feeds of the FTA channels far worse than Freeview HD. Suspect what is coming off the satellite is heavily compressed where as the DVB-T feeds from Freeview are less so.

Sky run higher bit rates on the sports channels than on others - which is very noticeable, especially on large displays.




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455 posts

Ultimate Geek
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  Reply # 729909 10-Dec-2012 17:49 Send private message

So there's more to quality than the definition I guess. Certainly recording an All Blacks match takes up way more HDD space than anything else. I thought i was paying for maximum quality, is all.




TV: Sony Bravia KDL324000. Freeview|HD
PC: ASUS P8P67 Pro B3, intel i5, 8Gb RAM, 120Gb SSD, Win 7
HTPC: Antec NSK2480B case, AMD A4-5300 CPU, Asus F2A85-M LE mobo, WD Caviar Green 64Mb 2TB HDD, HD Homerun, Win7 Home Premium, RAM 1600Mhz 4Gb.
Laptop: Sony VAIO VGN-CS16G
iPad 2

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Uber Geek
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  Reply # 730072 11-Dec-2012 06:08 Send private message

FV and Sky use different compression formats. Ons of the significant differences, apart from compression efficiency, is that MPEG2 does not require a de-blocking filter (and I can't see it implemented on Sky) where as the compression chosen for FV requires it. This by itself makes a difference in perceived quality.




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151 posts

Master Geek
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  Reply # 730079 11-Dec-2012 06:34 Send private message

Niel: FV and Sky use different compression formats. Ons of the significant differences, apart from compression efficiency, is that MPEG2 does not require a de-blocking filter (and I can't see it implemented on Sky) where as the compression chosen for FV requires it. This by itself makes a difference in perceived quality.


Aren't we talking about HD? I'm pretty sure Sky uses AVC/H.264 for their HD 'FTA' channels as they do for their other HD channels.

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Ultimate Geek
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  Reply # 730524 11-Dec-2012 15:22 Send private message

blair003: Do you pay sky each month for the "HD ticket"?


You don't need to paying Sky for the HD ticket to receive the FTA channels in HD -- all you need is a MySky HDi box and the basic subscription.

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Ultimate Geek
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  Reply # 730528 11-Dec-2012 15:25 Send private message

Yeah I saw that wording on their website - looks like you only need it for movies and sport.

That must be how they get away with calling it mysky HDi -- it is HD for some channels even if you don't pay for the ticket.



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Ultimate Geek
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  Reply # 730580 11-Dec-2012 16:06 Send private message

Niel: FV and Sky use different compression formats. Ons of the significant differences, apart from compression efficiency, is that MPEG2 does not require a de-blocking filter (and I can't see it implemented on Sky) where as the compression chosen for FV requires it. This by itself makes a difference in perceived quality.


I'm having trouble deciphering what you've said, sorry!

Freeview HD = mpeg2 = better perceived quality.

Do I have that right?

PS yes I am paying for the HD ticket.

PPS I'm planning to go to a FV based HTPC and I'm hoping to retain the same (perceived) better quality, but I'll post in the HTPC forum.




TV: Sony Bravia KDL324000. Freeview|HD
PC: ASUS P8P67 Pro B3, intel i5, 8Gb RAM, 120Gb SSD, Win 7
HTPC: Antec NSK2480B case, AMD A4-5300 CPU, Asus F2A85-M LE mobo, WD Caviar Green 64Mb 2TB HDD, HD Homerun, Win7 Home Premium, RAM 1600Mhz 4Gb.
Laptop: Sony VAIO VGN-CS16G
iPad 2

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  Reply # 730589 11-Dec-2012 16:14 Send private message

Both FVHD (SD and HD services and SkyHD (HD serivces only) use mpeg4 AVC/H.264, as for how the two are configured either the same or differently I cannot say.

Cyril

41 posts

Geek
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  Reply # 731222 12-Dec-2012 10:55 Send private message

Freeview HD and Sky HD use the same compression and very similar bitrates for 1, 2 & 3. Both based on a statistical multiplex with bitrates hovering between 8 - 10 mbits or so. There should not be a visually perceptible quality difference between the two, if there is then it's something in your setup causing it.

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