Do you think you have 1.1 pixel mapping?

[RLA]

Hello all
I have recently been to client’s homes that are using HTPC's with
Their projectors and display devises They told me that they were feeding the display device the native resolution for 1.1 pixel mapping and by-passing the internal scalar I found this to be inaccurate in both cases.

Using text is not a good method for verifying 1.1 pixel mapping you need a program for resolution test and to check moiré. Many time generic video card drivers don’t provide enough flexibility to obtain 1.1-pixel mapping the new Nvidia drivers do allow for custom resolutions and refresh rates but ATI does not.

Powerstrip may need to be used to create resolutions that will match your display device your refresh rates should be set at
NTSC=23.9 fps
For film 47.952 or 71.928
Video 29.9fps
59.940

PAL
25fps
50Hz
75Hz

Use this program to verify 1.1 mapping
Enjoy
http://www.construnet.hu/nokia/Monitors/TEST/monitor_test.html

 

[Vancouver]

I have always wondered if I am getting exactly 1:1 but just dont know for sure. I am using an iscan HD video processor and have a HD Panasonic plasma as a display device. The native resolution of the plasma is 1024x768 an I am sending that signal via VGA.

I wish I could find someone to pay in order to co eover and set it up right because every time i turn on the tv I am not sure if its 1:1 not know what it would look like if I had 1:1.

The test paterns help but arnt exact enough for me.

 

[trw005]

Yeah me too. Same boat with a new 42" Sammy plasma at 1024x768. I wish someone would write a thick book on HTPC. one for ATI and one for Nvidia. I got a 6600GT running out composite and it looks good but I have no clue as to its correctness.

 

[RLA]

Hello
1.1-pixel mapping is videophile heaven. You are not going to obtain this unless you use either the VGA or DVI connection. com/S-vid connections are not going to get it done. The 6600 GT is an excellent card the new Nvida drivers 77.77 have auto configuration display wizard you can tweak from there. DVD through these cards with 1.1 pixel mapping should be close to a very good HDTV feed Powerstrip has preset standard resolutions for most displays. Power strip ver 3.60 is available shareware here

http://www.entechtaiwan.net/util/ps.shtm

Nvidia cards and software have configurable timings and refresh rates

 

[Vancouver]

I have an external video processor (iscan HD) with a VGA output to my Plasma. Even though I am sending 1024x768p I have been told I still may not be getting the nate 1:1. I have the Frame rate set to 59.994, but not sure if it should be at 60? Either way the picture looks the exact same. Is there such thing as being close to 1:1 and having a the internal processor doing less work? Or if the internal processor is doing any work then it defeats the purpose?

 

[BMXTRIX]

I have found in testing that most displays NEVER allow 1.1 pixel mapping. Running any number of projectors through their paces and trying different setups it was very frustrating to find that there seemed to be no way to simply let an outboard scaler do the work it was designed for without an internal processor on the projector start adding or subtracting from it.

The first projector that I saw do this was from Sim2, and they continue to make this a standard 'aspect' mode. 1.1 pixel mapping from them means that they take the center of what you send them and the rest just falls off the screen... if there is any. It easily produced the finest images I have ever seen and the truest for what I had sent to it.

Nice to see a post about it.

 

[Vancouver]

I have found in testing that most displays NEVER allow 1.1 pixel mapping. Running any number of projectors through their paces and trying different setups it was very frustrating to find that there seemed to be no way to simply let an outboard scaler do the work it was designed for without an internal processor on the projector start adding or subtracting from it.

The first projector that I saw do this was from Sim2, and they continue to make this a standard 'aspect' mode. 1.1 pixel mapping from them means that they take the center of what you send them and the rest just falls off the screen... if there is any. It easily produced the finest images I have ever seen and the truest for what I had sent to it.

Nice to see a post about it.

its funny yu say tat because I know I am sending the right frame rate, but the line rate which changes as you change the frame rate never seems to full match. Its off by 0.1. I have spent near 2K on an external scaler and have probably never seen 1:1. At least I know know what I'm missing...and please dont tell me.

If anyone does have a Panasonic TH 42PX20 and iScan HD and have been able get a 1:1 via the VGA input please let me know. Infact I offer a $100 reward to anyone who makes it right