Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.




75 posts

Master Geek


Topic # 60635 29-Apr-2010 12:36
Send private message

Hi there, just a general question here regarding the quality of image coming from an HTPC:

I've hooked up the UHF feed to my shiny new plasma and the quality of the tv image from the tuner in the tellie is stunning.

I'm concerned that the quality of the image coming from my HTPC is not up to scratch. I'm still running a standard def signal into the tuners in the pc (yet to get a string enuf signal to push the DVB-T cards) but I'm not very comfortable with the fact that the computer is processing the signal before it goes out of the onboard HDMI connection to the TV.

If I'm playing a 1080p mkv from my htpc should I expect great quality, or should I consider a high quality graphics card for the pc? (I'm using onboard which according to the manufacturer is rated for full 1080p output via HDMI)

Hope that all makes sense..

Cheers!

Create new topic
160 posts

Master Geek
+1 received by user: 1


  Reply # 324696 29-Apr-2010 13:33
Send private message

madad:

If I'm playing a 1080p mkv from my htpc should I expect great quality, or should I consider a high quality graphics card for the pc? (I'm using onboard which according to the manufacturer is rated for full 1080p output via HDMI)

Hope that all makes sense..

Cheers!


Hi madad.
I've used DVB-T freeview through the computer and I can tell you it looked very nice indeed. Unfortunately I don't have a TV with an onboard Freeview decoder so I can't give you my impressions there.
I would expect most native TV decoders to do a decent job.

Can you post your system spec's so we have an idea about what hardware you're using?
Most of the new motherboard HDMI outputs do a good job with 1080P material, but interlaced (1080i like DVB-T freeview TV3) material can be a different story. Depending on what deinterlacing options are hardware assisted by your system you may see a difference.

Cheers

el_kano



8020 posts

Uber Geek
+1 received by user: 387

Trusted
Subscriber

  Reply # 324700 29-Apr-2010 13:38
Send private message

What make/model are the TV and onboard video on the htpc motherboard?

These sample clips / trailers might be useful to you for testing
http://www.h264info.com/clips.html

 
 
 
 


Try Wrike: fast, easy, and efficient project collaboration software


75 posts

Master Geek


  Reply # 326421 4-May-2010 12:36
Send private message

Right, some specs..

The tv is a panansonic 50" plasma. I'm using onboard ATI HD3200 HDMI output to the tv. The HTPC is windwos 7 x86.

I'm really struggling with the black levels, everything seems to drop off to black very quickly and I feel like in a dark scene I can't see any detail. The problem is common to tv (freeview) as well as sources such as Bluray from the htpc. The whole picture tends to looked washed out.

I'm upgrading to version 10.4 of the catalyst drivers to see if that helps, I see there's a few people complaining about such issues on the net.

I played with the gamma setting last night which reduced the greyness of the picture, but also resulted in less detail in dark scenes.

Should I switch back to an Nvidia card perhaps?

481 posts

Ultimate Geek
+1 received by user: 5


  Reply # 326518 4-May-2010 15:39
Send private message

madad: I'm really struggling with the black levels, everything seems to drop off to black very quickly and I feel like in a dark scene I can't see any detail. The problem is common to tv (freeview) as well as sources such as Bluray from the htpc. The whole picture tends to looked washed out.

Does live broadcast TV look much better?

20883 posts

Uber Geek
+1 received by user: 4095

Trusted
Subscriber

  Reply # 326583 4-May-2010 19:01
Send private message

blacklevels are a pain to deal with on a PC going to a TV since you either stretch it causing bad banding, or dont stretch it and hope that the tv will not show 16 as grey like most seem to.

adjusting the brightness/contrast controls was enough to get my sisters tv showing 16 as black, and there was no banding either like when the mpeg4 codec was doing it on the PC. Desktop etc looks pretty bad with the brightness and contrast set like that, but that is secondary to having black show as black.




Richard rich.ms



75 posts

Master Geek


Reply # 326750 5-May-2010 09:39
Send private message

Well interestingly (and after many hours of research - seems I'm not the only one struggling with this issue) I upgraded to the latest ATI drivers (10.4) yesterday and it made a huge difference to the quality of the picture. It's a lot darker but now seems to be accurate - the grey washed out look is gone. And that's for live tv as well as bluray content.

The picture is certainly darker than I'd like, so I'll continue to tweak brigh5tness and contrast but so long as I dont end up with the horrible greyed out mess I had before I'm happy..



75 posts

Master Geek


  Reply # 329669 13-May-2010 10:10
Send private message

After watching a mate's Bluray player playing Avatar on the same panel as I have last night I have decided that perhaps a media pc is not a good way to go.

I am completely unable to get the TV to recognise a 24p signal from my htpc. Is there something I have to do to get that to work? I thought manually setting the display settings to 1080p 24hz would have done the trick? But I get none of the 24p options in the TV menu..

483 posts

Ultimate Geek

Trusted

  Reply # 329697 13-May-2010 11:07
Send private message

The 3200's use shared onboard memory... This is slow...

There's a big difference in being able to display Bluray and tick the marketing boxes, and be able to display it well... All of the onboard's I have seen manage to tick the marketing boxes very well... When it comes to real performance they all seem to suck... that includes the 3200's (I turned my one into a WHS box, because it sucked so bad) and the 8200/8300's from NVidia. Sharing memory is cheap, but it isn't fast...

It could be that you've just found the limit of your onboard display chipset. It either can't display a 24p signal correctly, or its just running out of bandwidth to display a high bitrare Bluray such as Avatar.

There are certainly plently of graphics cards out there that can do a more than adequate job of displaying 1080p Bluray sources correctly, both from ATI and NVidia.

160 posts

Master Geek
+1 received by user: 1


  Reply # 329707 13-May-2010 11:18
Send private message

madad: After watching a mate's Bluray player playing Avatar on the same panel as I have last night I have decided that perhaps a media pc is not a good way to go.

I am completely unable to get the TV to recognise a 24p signal from my htpc. Is there something I have to do to get that to work? I thought manually setting the display settings to 1080p 24hz would have done the trick? But I get none of the 24p options in the TV menu..


I know previously (pre 2010) that to get 24P (which is actually 23.975) you had to use 23HZ and possibly reclock to sync. People have had it working correctly with 780g and 3200, but I'm not sure if there have been changes with the new drivers.

Check out this discussion:

http://www.avforums.com/forums/home-entertainment-pcs/1125692-does-ati-do-24p.html


722 posts

Ultimate Geek


  Reply # 329887 13-May-2010 17:59
Send private message

madad: After watching a mate's Bluray player playing Avatar on the same panel as I have last night I have decided that perhaps a media pc is not a good way to go.

I am completely unable to get the TV to recognise a 24p signal from my htpc. Is there something I have to do to get that to work? I thought manually setting the display settings to 1080p 24hz would have done the trick? But I get none of the 24p options in the TV menu..
Seeing as how you don't state what your HTPC config is, I can't assist that much.

However, if you are looking at Reclock as a means of avoiding video stutter, look at this for a good beginning. If you are using MediaPortal, in the last area of 'MPConfig>General' there is a section titled Dynamic Refresh Changer (I think). If you enable this it will automatically change the refresh rate, & you can enable a notifier which shows what the vieo is being refreshed to.

I was unsure if this was good for my LCDTV @24p resolutions, however the good folks here have assured me that in modern digital TVs, if your TV can handle the resolution, it will display it. Here is the thread if you're interested. If my TV craps out, they will be getting the billLaughing




Silverstone LC14 HTPC Case/Intel E4600 CPU/GA-EP35-DS3 MOBO/Asus EN9500GT graphics/2GB RAM/total 2TB HDD space/HVR-2200 & 2X 150MCE tuner cards/LG GGC-H20L BD Drive/MCE2005/Mediaportal/TVServer 1.1.0Final/LG 55"3D LED-TV/Denon AVR-1803 receiver/X1 projector



75 posts

Master Geek


  Reply # 330055 14-May-2010 11:25
Send private message

Sorry I was light on details regarding the platform I'm using - I have an AMD Quad core running on a Gigabyte GA MA78GM S2H. I was using the onboard hdmi but have gone out this morning and purchased an XFX Geforce 240 in the hopes that I will get a better picture. Its not so much stuttering I'm trying to avoid - its more image clarity, colour balance and smoothness of motion. I was under the impression the TV supports 24p but I can never find it in the TV's menu, even when I'm running the pc at 24hz. So I'm a little confused.

160 posts

Master Geek
+1 received by user: 1


  Reply # 330058 14-May-2010 11:35
Send private message

What is the exact model of the TV? I imagine the TV will automatically adjust based on the input, but need to know model to check for sure.

20883 posts

Uber Geek
+1 received by user: 4095

Trusted
Subscriber

  Reply # 330185 14-May-2010 16:38
Send private message

When I have tried 24Hz on a PC it was VERY obvious on the mouse update rate being so low as being almost unusable. That should give you an indication if you have 24Hz or not.




Richard rich.ms

722 posts

Ultimate Geek


  Reply # 330200 14-May-2010 18:03
Send private message

I recommend you run Monitor Asset Manager. Install this & it will give you your TV's capabilities; maybe. I ran it for my 32"Samsung & it stated the screen size was 7.25". But others seem to have no issues with it. Try it & see what vertical refresh rates your TV is capable of. I got the app from here.




Silverstone LC14 HTPC Case/Intel E4600 CPU/GA-EP35-DS3 MOBO/Asus EN9500GT graphics/2GB RAM/total 2TB HDD space/HVR-2200 & 2X 150MCE tuner cards/LG GGC-H20L BD Drive/MCE2005/Mediaportal/TVServer 1.1.0Final/LG 55"3D LED-TV/Denon AVR-1803 receiver/X1 projector

Create new topic



Twitter »

Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:





News »

Amazon launches the International Shopping Experience in the Amazon Shopping App
Posted 19-Apr-2018 08:38


Spark New Zealand and TVNZ to bring coverage of Rugby World Cup 2019
Posted 16-Apr-2018 06:55


How Google can seize Microsoft Office crown
Posted 14-Apr-2018 11:08


How back office transformation drives IRD efficiency
Posted 12-Apr-2018 21:15


iPod laws in a smartphone world: will we ever get copyright right?
Posted 12-Apr-2018 21:13


Lightbox service using big data and analytics to learn more about customers
Posted 9-Apr-2018 12:11


111 mobile caller location extended to iOS
Posted 6-Apr-2018 13:50


Huawei announces the HUAWEI P20 series
Posted 29-Mar-2018 11:41


Symantec Internet Security Threat Report shows increased endpoint technology risks
Posted 26-Mar-2018 18:29


Spark switches on long-range IoT network across New Zealand
Posted 26-Mar-2018 18:22


Stuff Pix enters streaming video market
Posted 21-Mar-2018 09:18


Windows no longer Microsoft’s main focus
Posted 13-Mar-2018 07:47


Why phone makers are obsessed with cameras
Posted 11-Mar-2018 12:25


New Zealand Adopts International Open Data Charter
Posted 3-Mar-2018 12:48


Shipments tumble as NZ phone upgrades slow
Posted 2-Mar-2018 11:48



Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.