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1080p from pc to hdtv

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Old 01-14-2007, 01:55 AM   #1  
A couch and an HDTV to go please.
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Default 1080p from pc to hdtv

http://www.highdefforum.com/showthread.php?t=35681
This was posted on the wrong thread i think so reposting here...


1080p

Hello all is this my first post here

I was excited when I purchased my new TV but all this 720p 1080i and 1080p and the trials and tribulations of getting them to all communicate together has had me going around in circles so and I hope you guys can clarify how to achieve 1080p from the PC to the TV in basic terms.

First the hardware

Sharp Aquos 52” LCD (LC-52XD1E)

(Specs you may need to know?)

 Full HD resolution (1920x1080) LCD panel with progressive scan
 PC Input (Analogue RGB)
 DCE (Dynamic Contrast Enhancement)
 ‘HDMI’ Digital Interface for Clear Image Playback
 Advanced Super View LCD Panel
 Built-in Freeview Digital Terrestrial Tuner (DVB-T)
 Displays 1080p, 1080i and 720p HD Signals (HD Compatible)
 3D-Y/C comb filter
 52" Wide, Advanced Super View & LCD with TruD picture enhancement
 technology
 Resolution 1920x1080 Brightness 450 cd/m2
 Contrast 2000:1
 Dynamic Contrast Ratio 6000:1
 Back Light Life 60,000 hours
 Response Time 4ms
 Power Source AC 220V–240V, 50Hz
 Tuner IDTV Freeview DVB tuner
 Audio Technology
 Nicam/A2
 Audio Output 10W + 10W
 Full HD
 Full HD & HD Ready

Terminals
 2x HDMI INPUT,
 2x SCART IN,
 AV/S-VIDEO IN,
 COMPONENT IN (VIA VGA),
 PC INPUT (VGA),
 RS232

PC

Windows XP 64 bit professional
Intel D Processor
1GB Ram

Nivdia 6800 XT graphics card
-Display interface: DVI x 2
-out put interface: TV out


Driver updated to - Nvidia 6.14.10.9371 22/Oct/2006 (allows HDTV output and HDCP compliant I think?)

In the first DVI output I have a computer monitor hooked up via DVI to RGB converter
In the Second DVI output I have a 5 meter DVI to HDMI cable
For sound I’m using a 5 meter optical cable plugged into Pioneer surround sound amp

Having set everything up I sit back to watch HD content fed by my PC to my TV but it seems that I am getting 1080 perhaps 1080i but not 1080p some HD files work and look great but when I try to play Star Wars episode 3 Revenge of The Sith in 1080p (file encoded 1080p H264 oar dd51 16gb) the file wont play.

Am I making the best of my connections (note. The TV manual suggests DVI/RGB conversion cable with 3.5 mm stereo jack cable

Should I buy those leads to achieve 1080p or is my current setup better?

Is the set up ok but the graphics card or driver that is not able to output to 1080p?

If so can I upgrade driver or should I upgrade graphics card?

If I have to upgrade my graphics card what type of card should I buy?


It’s all so confusing I just want to sit back and view 1080p in all its glory … Any Help would be appreciated

Please help

edit - I think it may be a graphic card issue pc processing increases near 100% when 1080p is played and i dont recall 1080p setting on Nvidia control panel only 1080i looks like a new card is needed...

is any of this correct???
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Old 01-14-2007, 11:32 AM   #2  
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Does your TV have HDMI 1.3? It needs that to process 1080p from Sony's Blueray dvds. Where else do you get a legal copy of that Star Wars movie in 1080p? The highest resolution broadcast over the air is 1080i, regardless how it was originally encoded.
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Old 01-14-2007, 12:39 PM   #3  
A couch and an HDTV to go please.
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Quote:
Originally Posted by patmurphey
Does your TV have HDMI 1.3? It needs that to process 1080p from Sony's Blueray dvds. Where else do you get a legal copy of that Star Wars movie in 1080p? The highest resolution broadcast over the air is 1080i, regardless how it was originally encoded.
Thanks for the reply

I thought it was 1080p that’s why...

I don’t know if it is HDMI 1.3 how can I tell? Nothing in manual and Google does not seem to throw up anything for me. Does that mean i have basic HDMI and am I stuck?

When I downloaded movie clips in true 1080p they don’t play computer seems to struggle. I have 1 GB ddr2 (1 stick) and Intel duel processor so I'm thinking its a graphics card issue!? Yet when I download 1080i or 720p they play ( i think at 1080i since that appears as the max setting in NVIDIA control panel)

What should I do??
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Old 01-14-2007, 01:39 PM   #4  
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While the set is a 1080p panel as far as the output is concerned, the question I have after reviewing this http://www.av-sales.co.uk/SHARP-LC-52XD1E-130-.htm is does it accept a 1080p/60 (or50) input signal and if so through which inputs. Note it states: Displays 1080i and 720p HD Signals which indicates it won't accept a 1080p/60 signal.

Most sets that will accept 1080p/60 will do so only through the HDMI input. 1080i may be your limit and the PQ will not suffer watching film sourced video clips.
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Old 01-14-2007, 02:35 PM   #5  
A couch and an HDTV to go please.
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Hi rbinck

Thank you for your reply…

Firstly can I take this opportunity to thank you for your posts in general …I know when I read through the threads on this site that various knowledgeable posts you have written have really helped broaden my understanding on this subject so thank you…

That aside

I have looked at your link interesting…http://www.av-sales.co.uk/SHARP-LC-52XD1E-130-.htm

I note on the product disciption overview it mentions only 1080i and 720p but further down the page in the full specs it says “Displays 1080p, 1080i and 720p HD Signals (HD Compatible)”

now does it ouput at 1080p (manual no help) i just dont know but will google it however The guy in the shop told me it was full 1080p compatibility although that could be marketing speak…

Do you think he was mistaken? are the overview specs and the full specs just misleading..

I honestly thought I had connected the wires the best way even though the manual specified what I thought to be an inferior method…also why does the pc appear to use full processing power when trying to play 1080p and not any other medium. I read on a previous thread about graphic card issues…

Please guys help me get the facts
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Old 01-14-2007, 02:53 PM   #6  
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http://www.avforums.com/forums/showt...381973&page=13

Quote:
Originally Posted by podavies
Can anyone tell me what the PC res is on these TV, am I limited to 1360 by 768, using a DVI to VGA cable. Or will i be able to use the full 1080p resolution.


Technically speaking with using 1920x1080 screens their is no difference in displaying a PC desktop to a 1080i or 1080p video source. At the end of the day its pixels.

The only thing that we havnt had confirmed yet is how overscan can be controlled and if indeed 1:1 (meaning all 1920x1080 pixels will be visible)

For example the Sony X series supports this mode meaning no scaling is required at all. If this is not posible on the Sharp it will be a big dissapointment but using a GFX card and "underscanning" the image within the HDTV software settings will still enable a full view desktop with only a little scaling, but this would be a worst case scenario.

VGA input, would i think be restricted to a 1280x1024 resolution. Really VGA has to support the most common resolution for compatibility purposes.

Going from DVI - HDMI isnt an issue and really soon the market will be full of HDMI output Gfx cards.
__________________

still no clearer..
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Old 01-14-2007, 03:04 PM   #7  
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I read some of that thread on the avforum and never came up with a post that said one way or the other definitively. The answer as to weather the display will accept a 1080p/60 input may be in there, but I'm not going through the 5000+ posts myself.

One trick they pull is if a set has an ATSC tuner then it will support all 18 ATSC formats. Since there are 2 1080p ATSC formats, it could be said it will display 1080p received. Problem is nobody is broadcasting 1080p/24 or 1080p/30. Not saying this is the case, but they have that passage right after the built in tuner:
Built-in Freeview Digital Terrestrial Tuner (DVB-T)
Displays 1080p, 1080i and 720p HD Signals (HD Compatible)
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Old 01-14-2007, 03:18 PM   #8  
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Quote:
Originally Posted by rbinck
I read some of that thread on the avforum and never came up with a post that said one way or the other definitively. The answer as to weather the display will accept a 1080p/60 input may be in there, but I'm not going through the 5000+ posts myself.[/I]
i know so many posts I feel like I'm on the hunt for the x files

I did see this (page 17 lol)

Re: Sharp LC-52XD1E

--------------------------------------------------------------------------------

Still doing a bit of research, please add to the list of questionable features PIP & PAP modes, dont think weve got to discuss those yet. Seems Sharp may not be too bothered about them.

Ok Folks:

1:1 Will be possible....
Sharp use a mode called "Dot - Dot" which means 1:1
This is only available on 1080 sources.

Backlight control
4x Picture presets standard,movie,game,dynamic all adjustable
1x User mode independent for each input
1x non adjustable preset (auto?)
Room lighting sensor called OPC (optical picture control)
5x Colour temp settings
Black level expansion On/Off


Maximium res via VGA is 1280x1024
(told you so)

But it has this at the bottom...

* information based on a CNET review of the LC-37D90U 1080p model from June 6th 2006.

hope this thread will help other who have bought or are thinking about buying this range
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Old 01-14-2007, 03:48 PM   #9  
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1080p vs. 1080i is just a transmission method as far as viewing video. Only if you want to get your desktop on the TV would 1080p be better and then only if you were playing games where a high temporal resolution is desired and available. The movie you talked about is probably 1080p/24 like all of the HD DVD and BR movies and a 1080i connection between your PC and the TV will give you all of the temporal resolution (24fps) and spatial resolution (1920x1080) that is available in the material, so I would be fine with 1080i for the PC output. The exception to this is if the deinterlacer in your display does not deinterlace properly. See The 1080p HDTVs for more info on this.

I suspect, but don't know for sure, that there is some other issue with the 1080p movie file because the media player should convert the video to whatever format your video card is set for.

Last edited by rbinck; 01-14-2007 at 03:50 PM..
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Old 01-14-2007, 04:26 PM   #10  
A couch and an HDTV to go please.
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I wanted to make sure that the tv would be able to take blueray and ps3 plus play games from pc on tv using big screen

So for this I would be best at 1080p (is my logic correct?)

I found this in that super long thread but still not 100% It truely is like the x-files the truth is out there! lol...

"Many thanks for your enquiry.
I followed up with our Sharp rep regarding the specs and have written confirmation that the XD1 series will take a 1080p input via HDMI from devices such as BluRay & PS3 but 1080p signals from a PC are NOT supported. To what extent they are not supported is yet to be fully tested.

The component and the PC input will not accept a 1080p signal.

I have sent some more follow up questions to Sharp and am waiting for a reply"
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Old 01-14-2007, 04:48 PM   #11  
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Wow here we are at post #10 and what you really want to know finally comes out.

I would caution you to get clairification from sharp based on not just 1080p but at what frame rate. They may be talking about 1080p/24, which would be great for movies. I can't think of any other reason the TV would support 1080p from a HD player but not a PC.
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Old 01-14-2007, 05:13 PM   #12  
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[QUOTE=rbinck]The answer as to weather the display will accept a 1080p/60 input may be in there, but I'm not going through the 5000+ posts myself.QUOTE]

Supports 1080p/50 and 1080p/60
1080p/24 they are still checking

page 36 post#534

and later Seems like the 1:1 pixelmapping was confirmed at the CEDIA - sounds good.

HDMI1.2

im going to download 720p and 1080p with and with out drm from http://www.highdefforum.com/showthread.php?t=6537

and see if it will play those files...

I note when i choose the hdmi input on my tv i see my desktop in extended mode and it states the format is at 1080i this must be a driver graphics card issue right...

so new to all of this just trying to get my head around it
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Old 01-14-2007, 05:41 PM   #13  
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ok just tried alexander trailer

player vlc
type wmv (drm)

ok the 720p trailer played no problem
the 1080p trailer took a few attempts to load into vlc but when it did the picture quality looked better but the pc resources were at 100% and the frames were inconsistant with lots of still frames...

what can i conclude from this?
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Old 01-14-2007, 05:56 PM   #14  
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just tried amazon trailer wmv no drm and 720p displays a picture and then freezes and 1080p wmv no drm wont play at all..help!

Whats going on
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Old 01-14-2007, 05:56 PM   #15  
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You need a badder PC. That's why I went with a MyHD MDP-130 card. Not only do I get a OTA DVR, but I have a card that will play video files through a hardware decoder rather than a software decoder. True it only plays transport streams (mpeg2) or DVD file format, but converter software is available to convert the mpeg4 files to mpeg2 transport streams. Some of them take all night, but the studder is gone.

HD takes a lot of computer power and making sure you have nothing running in the background except what is absolutely necessary is crucial when you are using software decoders.
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