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post #181 of 255 Old 09-07-2005, 12:42 AM
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arca,

Thanks for your effort, more and more projector manufacturers and users have been aware of the Sync/Tearing/Dropping frame issue. Being one who benefited from JudderTest, I drive my Optoma H79 at an V/F of 47.952Hz with helps of PowerStrip and ReClock.

Thanks again.
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post #182 of 255 Old 09-07-2005, 01:31 AM
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Hi Arca,

Glad to see you posting again and thanks for the quick reply.

Yes, the monitor OSD, powerstrip, reclock and judder test all report the same refresh rates (with minor diff of course). I thought LCDs are supposed to be single refresh rate devices, and this is done over DVI. Yet I do not detect any noticeable judder when changin refresh rates. Is the difference subtle?

How is your quest for multisync projector? I have recently picked up a viewsonic pj755d dlp projector, and will be using judder test once they are set up. Since these are single chip device with a colour wheel, do you think they will sync to 48/50/60/72Hz refresh rates? What are the symptoms that I should be looking for?

Do you think the new batch of >37" 1920x1080 LCD TV are capable of multiple refresh rates?

Once again, thank you for a great piece of work.
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post #183 of 255 Old 09-07-2005, 12:47 PM - Thread Starter
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Thanks guys, I'm glad you're finding JudderTest useful! It finally helped me find my dream projector as well - JVC HX2. It's smooth and tear-free at all refresh rates from 48 to 60 Hz. It's great if manufacturers are putting more effort into these issues, I don't know how they thought they would get away with making all display devices 60 Hz..

mariner888,

if the judder was there, I'm sure you would see it on the bars. A crude simulation of judder is to set bar speed = 3, and a low frame rate, like 15 frames/sec. The bars will seem to skip forward instead of flowing smoothly. The edge of the bars will look blurred. That look, and a little more irregular, is my experience of judder. If you don't see anything like this, we can only conclude that your monitor is free from judder!

As for DLP projectors I've heard of some models with judder and others without. They say that you can hear the color wheel change speed if it does adapt to the input refresh rate.

I have no idea about LCD TVs. I hope to get one of these myself in the future. Or perhaps a widescreen monitor. I'm waiting for something very thin and aestetically pleasing. When OLED hits perhaps.
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post #184 of 255 Old 09-07-2005, 09:50 PM
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Hi arca, thanks again. Is the HX2 a LCOS design, and do you use DVI to connect to a PC?
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post #185 of 255 Old 09-08-2005, 01:54 AM - Thread Starter
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That's right, it's LCOS and is connected by DVI-D to my PC.
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post #186 of 255 Old 09-08-2005, 10:27 PM
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Hi arca, looks like i should pick up a HX2 as well. Please tell me more about it.

1. Is it fussy about clock accuracy of the graphics card? As that might rule out the use of Nvidia cards. Do you need Powerstrip to fine tune the refresh rates?

2. The 1400x788 resolution is somewhat unusual, so deos the EDID defines timing strings for this, and also for 48 and 50 Hz refresh rate?

3. If 48 and 50 Hz refresh rates are not defined, do you tweak the windows registry , or use powerstrip to use these refresh rates?

Thanks.
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post #187 of 255 Old 09-09-2005, 01:44 PM - Thread Starter
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If it's in your price range I definitely think you should have a look at it.

There was another guy on here who had some problems getting HX2 to perform at frequencies other than 60 Hz. He had an Nvidia card though. I know that JVC addressed the issue of judder after HX1 and obviously it's working for me. I have a Radeon. So maybe that's the reason. There were some issues for me too, I got red sparklies at some timings. It was easy enough to get around by trying a different pixel clock. I have a 30 ft DVI cable, so I don't know if that had something to do with the sparklies.

There's no help to be found in the EDID. All I see are the standard resolutions and one 1400x788@60. I'm using PowerStrip to get 50 Hz. That's the only way I know. But it works great. 1400x788 is available in games (Call of Duty, Far Cry, Half Life 2, Battlefield 2, ...) and movies are as smooth as ever, especially after VMR9 Renderless was implemented in Zoom Player.
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post #188 of 255 Old 09-29-2005, 10:08 PM
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Hi arca,

Finally had a chance to do some tests with the PJ755 using a radeon 9700 card. Here are the results:

1. Frame rate=1 Bar Speed =1 Bar Count=1 Bar Width=10

No obvious sign of judder and no dropped frames for 60/50/48 Hz, although for 60Hz did notice the bar seemed to skip at the middle as it moved across the screen. Used parameters defined in EDID timing block for 60Hz refresh, and modified pixel clock to get 48 and 50Hz. Varying the pixel clock away from EDID specified clock rate did not result in any difference.

2. Refresh rate=4, Bar speed=4

When refresh rate is reduced by a factor of 4, and bar speed increased as suggested, the symptoms you described became apparent for all refresh rates. Again, modifying the pixel clock did not locate any sweet spot refresh rate.

3. Bar Width=1

When bar width was set to one, two closely spaced line appearerd instead of one. The movement across the screen was smooth for all refresh rates.

4. With a GT6600 card, dropped frames for all refresh rates.

5. Using reclock, vsync test was well behaved and judder test gave a similar result.

6. Did not detect change in colout wheel speed.

Would appreciate if you could help interprete these findings.

Thank you and kind regards.
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post #189 of 255 Old 09-30-2005, 08:46 AM
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mariner, are you using 59.94 hz and 47.952 hz(I think), respectively? Those are the proper refresh rates for NTSC material and for NTSC film DVDs at 2x speed, respectively. I guess it doesn't matter though if your projector speeds up the wheel a little bit to match 48.00 hz and 60.00 hz exactly though.

EDIT: 47.952 hz I believe is the proper ~48hz rate for NTSC film DVDs
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post #190 of 255 Old 10-04-2005, 07:53 AM - Thread Starter
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mariner888,

based on (1) it sounds like your display plays nice, except for that skip at 60 Hz? If they are periodic skips I'd look for another display timing for the same refresh rate. If the bar moves smoothly at refresh rates in a range around 48, 50 and 60 Hz you shouldn't have any trouble dialing in the refresh rates that maxleung suggested and get movie playback that is free of both judder and repeated/skipped frames (as reported by Reclock).

What you mention in (4) is odd though. Do you get dropped frames every now and then or only at the beginning of the test? Someone reported getting dropped frames the first few seconds and then none (also an Nvidia card). If it's only the first few seconds it could be that the graphics driver needs a period of initialization before it synchs as expected. No worry as long as the rest of the movie is fine, right.
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post #191 of 255 Old 10-05-2005, 04:06 AM
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Hi max,

Thank you for the suggestions. Will try using a wider range of piexl clock rate to see if there is a sweet spot.

best regards.
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post #192 of 255 Old 10-05-2005, 04:43 AM
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Hi arca,

Thank you for the reply.

The PJ755D is a cheap single chip dlp projector, and should make a good candidate for 60Hz single refresh rate display device. But so far it has acquitted itself pretty well. Apart from what I described in (2) above and the credits at the end of movies, there were no obvious signs of judder, even with 50Hz material. Perhaps I am blind to judder after all.

I believe (3) was aslo noted by previous posts in this thread. Would you know what may be the cause?

The situation with the 6600GT is somewhat of a puzzle to me as well. I picked up this dual dvi card to test a configuration suggested by another enigmatic forum member bbq@kl, using two SX50 in the vertically spanned and rotate mode to obtain a 2100x1400 destop. The locak Canon rep had earlier done a demo with the projectors connected to the dvi and vga output of a 9600 card. Not ideal, and the 9600 was clearly underpowered to handle two display simultaneously, but somehow he got the mpc and vlc working across two displays. Well, this experiment will have to wait until these othere issues are sorted out.

Will like to check out the HX2. Judging from your comments, I guess there is no officoal support for 48/50/60Hz refresh over DVI?

Thank you and best regards.
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post #193 of 255 Old 10-14-2005, 04:07 AM - Thread Starter
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mariner888,

I'm slow in responding. Anyone's welcome to help explain these things. After all, I'm merely a software guy, not a video expert!

I can only guess at (3), never heard of anything like it. Could it be caused by DLP dither perhaps? I'm thinking of how (older?) DLPs seem to smear the picture when there is a lot of motion. If they dither the pixels for a time that spans two frames, you should get something that looks like two superimposed frames. Two bars in JudderTest. If this is the case, it would also mask judder to a degree, at the cost of smear of course.

The experiment with two SX50 sounds interesting. You hear people thinking about this now and then, but not many actually get to try it.

I have not heard anything officially from JVC other than the usual - "it syncs to 50 Hz". But I had a correspondance with them and they admitted that people had been complaining about this issue and they put a fix for it in HX2. They had to upgrade the hardware, they could not fix it by just upgrading the firmware. Perhaps it's too technical a feature to put in a spec sheet.
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post #194 of 255 Old 12-08-2005, 08:58 AM
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New Sceptre 37" owner here...I'm going to give this a try. Thanks for the software.

P
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post #195 of 255 Old 12-08-2005, 05:24 PM
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arca,

Just want to say thanks for the tool. I dialed out judder on a Sceptr 37" LCD. 53.306Hz was the majic number. Great job!

P
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post #196 of 255 Old 12-09-2005, 05:20 AM
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This thread confuses my alittle. I have a Panasonic AE900 which is a 1280x720p LCD. I use my 6600GT's DVI port to drive it. Can you set this LCD (or any LCD) at other rates beside 50/60? Powerstrip will let me select other rates, as well as the nVidia drivers. But I see no visual difference on the screen, or see no difference in JudderTest results. I have tried 15, 48, and 72.
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post #197 of 255 Old 12-09-2005, 08:40 AM - Thread Starter
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Quote:
Originally Posted by Polypro View Post

Just want to say thanks for the tool. I dialed out judder on a Sceptr 37" LCD. 53.306Hz was the majic number. Great job!

Great! Displays with these odd "magic numbers" will of course not be perfectly smooth with a source feeding at 50 Hz or 59.94 Hz, but at least you should have minimized the problem. You now have one conversion 59.94 (DVD/TV) -> 53.306 (display) Hz, instead of 59.94 -> 60.xxx Hz (video card default) -> 53.306 or 59.94 -> 60.xxx Hz -> tearing.
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post #198 of 255 Old 12-09-2005, 08:49 AM - Thread Starter
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Quote:
Originally Posted by Easley View Post

This thread confuses my alittle. I have a Panasonic AE900 which is a 1280x720p LCD. I use my 6600GT's DVI port to drive it. Can you set this LCD (or any LCD) at other rates beside 50/60? Powerstrip will let me select other rates, as well as the nVidia drivers. But I see no visual difference on the screen, or see no difference in JudderTest results. I have tried 15, 48, and 72.

LCDs usually accept many refresh rates but may show video artifacts on some or most refresh rates. I think AE700 didn't show judder on 50 and 60 Hz, so maybe AE900 is good enough to take care of even 15 Hz. Well, at least you should see the bar moving faster at 72 Hz than at 15 Hz? 15 Hz should look a little jerky because it's so slow.
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post #199 of 255 Old 12-12-2005, 10:31 AM
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Quote:
Originally Posted by arca View Post

Great! Displays with these odd "magic numbers" will of course not be perfectly smooth with a source feeding at 50 Hz or 59.94 Hz, but at least you should have minimized the problem. You now have one conversion 59.94 (DVD/TV) -> 53.306 (display) Hz, instead of 59.94 -> 60.xxx Hz (video card default) -> 53.306 or 59.94 -> 60.xxx Hz -> tearing.


Thanks arca. What would be the better scenario for NTSC/ATSC material:

1. Broadcast > 60Hz w/NVIDIA Driver > 53.306Hz w/Powerstrip

Or

2. Broadcast > 50Hz w/NVIDIA Driver > 53.306Hz w/Powerstrip

The display runs fine at 50Hz and improved the judder before I even found this thread and tried Powerstrip. Or does it not matter?

Thanks,

P
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post #200 of 255 Old 12-12-2005, 09:59 PM
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Hi Polypro,

53.3Hz is certainly interesting for your Sceptr 37' LCD. Would appreciate if you could kindly share the EDID info.

Did you also try 48 and 50Hz?

Thank you and kind regards.
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post #201 of 255 Old 12-13-2005, 02:49 AM - Thread Starter
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Quote:
Originally Posted by Polypro View Post

Thanks arca. What would be the better scenario for NTSC/ATSC material:

1. Broadcast > 60Hz w/NVIDIA Driver > 53.306Hz w/Powerstrip

Or

2. Broadcast > 50Hz w/NVIDIA Driver > 53.306Hz w/Powerstrip

The display runs fine at 50Hz and improved the judder before I even found this thread and tried Powerstrip. Or does it not matter?

Thanks,

P

Hmm, the NVIDIA driver and Powerstrip are really one and the same step. Powerstrip is just used to configure whatever video driver you have. Since the broadcast is always ~60 Hz and the display tries to force everything to ~53.306 internally, you might as well do this 60->53.306 conversion on the PC to be sure you avoid tearing. So my bet is on setting 53.306 using Powerstrip, or NVIDIAs own display properties if it has enough precision. The software used to grab frames off the broadcast should then render the latest frame every 1/53.306 seconds, in effect converting 60->53.306.
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post #202 of 255 Old 12-13-2005, 11:19 AM
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Hello arca!

Thank you again for this great little tool! It puts the finger exactly on the worst problem currently happening in the HTPC scene (and for a long time): Motion artifacts when running from a PC.
This is so overlooked by nearly everybody - i'm happy that this old thread is more popular recently and again attracts a few people. Its also nice to see that you are still around and give support to people.

After all the praise, however i have one small request:

Please remove the need for PowerStrip from JudderTest!

Of course i have some arguments to share about this:
-It confuses people because they think they can really fix their problems with PowerStrip - which is not true.
-Display drivers are capable of advanced timing recently.
-I really don't want to install PowerStrip if i don't need it at all.

Thanks again for all your dedication and hours you put into this!
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post #203 of 255 Old 12-13-2005, 11:36 AM - Thread Starter
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Quote:
Originally Posted by Burrito View Post

After all the praise, however i have one small request:

Please remove the need for Powerstrip from Juddertest!

Thank you, I'm glad my little program can help a few improve their HTPC. You're right that I should remove the need for Powerstrip. But then JudderTest will be without the controls to adjust timings on-the-fly. Xmas vacation is coming up, I'll get on it then!
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post #204 of 255 Old 12-13-2005, 11:42 AM
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Mariner, here it is (moninfo.exe):

Monitor
Windows description......... Plug and Play Monitor
Manufacturer................ SEP
————————————————————————————
Plug and Play ID............ SEP0064
Serial number............... 777 (153100777)
EDID data source............ I2C bus (real-time)
————————————————————————————
Manufacture date............ 2005, ISO week 31
EDID revision............... 1.3
Display type and signal..... Digital
Sync input support.......... n/a
Screen size................. 700 x 390 mm (~33")
Power management............ Active off/sleep

Color characteristics
Display gamma............... 2.20
Red chromaticity............ Rx 0.640 - Ry 0.341
Green chromaticity.......... Gx 0.286 - Gy 0.610
Blue chromaticity........... Bx 0.146 - By 0.069
White point (default)....... Wx 0.284 - Wy 0.293

Timing characteristics
VESA GTF support............ Supported
Horizontal scan range....... n/a
Vertical scan range......... n/a
Video bandwidth............. n/a
Extension blocks............ 1
Timing recommendation #1.... 1920x1080 at 60Hz
Modeline................ "1920x1080" 148.500 1920 2008 2052 2200 1080 1084 1094 1124 +hsync +vsync
Timing recommendation #2.... 2072x1363 at 47Hz
Modeline................ "2072x1363" 358.400 2072 2121 2946 5308 1363 1366 1368 1432 -hsync -vsync

Standard timings supported
640 x 480 at 60Hz - IBM VGA
800 x 600 at 60Hz - VESA
1024 x 768 at 60Hz - VESA
1024 x 768 at 75Hz - VESA
1280 x 1024 at 60Hz - VESA
1280 x 1024 at 75Hz - VESA
1600 x 1200 at 60Hz - VESA
1920 x 1080 at 60Hz - SEP
2072 x 1363 at 47Hz - SEP

Raw EDID base
00: 00 FF FF FF FF FF FF 00 4C B0 64 00 09 03 00 00
10: 1F 0F 01 03 81 46 27 78 2B D5 7C A3 57 49 9C 25
20: 11 48 4B 21 0B 00 A9 40 81 80 01 01 01 01 01 01
30: 01 01 01 01 01 01 02 3A 80 18 71 38 2C 40 58 2C
40: 4A 00 C4 8E 21 00 00 1E 00 00 00 00 00 00 00 00
60: 00 00 00 00 00 00 00 00 00 00 00 00 00 8C 18 A4
70: 8C 53 45 50 31 39 32 30 20 20 20 20 20 20 01 2B

Raw EDID extension (CEA-861)
00: 02 03 20 F1 49 01 02 03 04 85 06 07 08 09 23 09
10: 57 07 83 01 00 00 65 03 0C 00 00 00 00 00 00 00
20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 72

EIA/CEA-861 Information
Revision number............. 3
DTV underscan............... Supported
Basic audio................. Supported
YCbCr 4:4:4................. Supported
YCbCr 4:2:2................. Supported
Native formats supported.... 1
DTV formats supported....... 9

CE standard timings supported
640 x 480p at 59.94/60Hz (4:3) - Default
720 x 480p at 59.94/60Hz (4:3) - EDTV
720 x 480p at 59.94/60Hz (16:9) - EDTV
1280 x 720p at 59.94/60Hz (16:9) - HDTV
1920 x 1080i at 59.94/60Hz (16:9) - HDTV (Native)
720 x 480i at 59.94/60Hz (4:3) - Doublescan
720 x 480i at 59.94/60Hz (16:9) - Doublescan
720 x 240p at 59.94/60Hz (4:3) - Doublescan
720 x 240p at 59.94/60Hz (16:9) - Doublescan

Display adapter
Adapter description......... NVIDIA GeForce 6600
Adapter device ID........... 0x00F210DE
Display settings............ 1920x1080, 32bpp

User/computer information
Registered user name........ Ron
Registered organization..... Home
Network user name........... Ron
Network computer name....... HTPC
Windows version ............ Windows XP
Windows build .............. 5.01.2600 Service Pack 2
Installation date .......... 8/31/2005 12:00:00 PM




I tried 50Hz and it helped with the tearing, I didn't try any lower. I then was directed to this thread by donsev on the Sceptre Review thread and arrived at 53.306Hz as the best compromise using JudderTest.

P
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post #205 of 255 Old 12-14-2005, 12:54 AM
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Hi Polypro,

Thank you for posting EDID. Detailed timing block 1 looks fine, but block 2 looked somewhat suspect with 358.4 MHz pixel clock, probably beyond the capabilities of dual link DVI.

But the display should work fine at 1920x1080@60Hz with the Nvidia card. Perhaps it's a faulty unit?

Regards.
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post #206 of 255 Old 12-14-2005, 12:55 AM
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Hi arca,

Greetings. Sorry for the late response to your earlier post. Had to nail down a few things....

Anyway, the dropped frames issue with Nvidia card was resolved, and more tests were done with 47.952, 48, 50, 59.94 and 60.02 Hz refresh rates. Both the LCD monitor and DLP projector performed with flying colours. It would appear that the TMDS receiver in the display had no problem syncing with different pixel clock rate, and whether any refresh rate conversion was done subsequently was difficult to tell indeed. Quite an amazing result.

The test with reclock was less consistent, with periods of well behaved moving bar follwed by jerky motion, or at times, with a different speed. This happened most with 23.976 fps material, and could be due to reclock changing the playback rate.

I tried simulating what judder would look like, but could not get reclock to work when playing 50fps material with refresh rate set to 60Hz.

As the guys at the IT department have figured out how to add custom refresh rates to windows registry without PS, I look forward to the next version of PS free judder test. Would it then have the ability to output at frame rates independent of the display refresh rate?

The experiment with dual Canon did not proceed well. The guys could not get the nvidia driver to do 90 degrees rotation in spanned mode, and if configured as dual mode performance would take a big hit.

So the search continues for 1080p LCOS, and the HD2K is looking good at the moment. The timing specs provided on the JVC website has detailed timing blocks defined for 50 and 60Hz, so I guess it means official support for both. As you are familiar with JVC products, would you know if it also supports 48Hz?

Finally, would like to know how you set custom refresh rates with your HX2. Did you change the pixel clock while keeping the same porches, or change the horizontal porches with same pixel clock?

Thank you and best regards.
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post #207 of 255 Old 12-14-2005, 12:36 PM - Thread Starter
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Quote:
Originally Posted by mariner888 View Post

Anyway, the dropped frames issue with Nvidia card was resolved, and more tests were done with 47.952, 48, 50, 59.94 and 60.02 Hz refresh rates. Both the LCD monitor and DLP projector performed with flying colours. It would appear that the TMDS receiver in the display had no problem syncing with different pixel clock rate, and whether any refresh rate conversion was done subsequently was difficult to tell indeed. Quite an amazing result.

Nice! What was the resolution to the dropped frames issue?

Quote:
As the guys at the IT department have figured out how to add custom refresh rates to windows registry without PS, I look forward to the next version of PS free judder test. Would it then have the ability to output at frame rates independent of the display refresh rate?

Frame rate and refresh rate could easily be independent, but what concerns me is that it would be at odds with the purpose of JudderTest. It would be useful for simulating judder, but could also confuse those who do not understand exactly what is happening. Worst case scenario would be judder blamed on a display when it was just a newbie testing with bad parameters. An "advanced checkbox" to enable arbitrary frame rates could be a compromise.

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The experiment with dual Canon did not proceed well. The guys could not get the nvidia driver to do 90 degrees rotation in spanned mode, and if configured as dual mode performance would take a big hit.

Aw, too bad!

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So the search continues for 1080p LCOS, and the HD2K is looking good at the moment. The timing specs provided on the JVC website has detailed timing blocks defined for 50 and 60Hz, so I guess it means official support for both. As you are familiar with JVC products, would you know if it also supports 48Hz?

Unfortunately, I recall someone having judder issues with HD2K. I think it was at 48Hz, or even 50Hz. It was here on AVS, a number of months ago. Better look it up to be sure (or test it), but it makes sense, HD2K was released before HX2 and could have the same problem as HX1.

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Finally, would like to know how you set custom refresh rates with your HX2. Did you change the pixel clock while keeping the same porches, or change the horizontal porches with same pixel clock?

I use horizontal porch to get as close as possible to the refresh rate I want. If it doesn't hit it spot on, I alter the pixel clock one step up or down. This gives a whole new set of refresh rates to chose from. Eventually I get all the decimals right.

I suppose an alternative could be to go for lowest possible pixel clock and minimal porch and synch. High pixel clock should only contribute to higher risk of errors when transferring pixels. I didn't test the limits much myself. I was happy once I had the important refresh rates dialed in.
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post #208 of 255 Old 12-15-2005, 08:26 PM
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Hi arca,

Thanks for reply.

1. No more dropped frames after connecting the 12V power supply to the 6600GT.

2. The "advanced checkbox" feature sounds good. This would provide a source with known and constant frame rate.

3. I'm not sure what to make of the 50Hz judder issue with HK2K. It's defined in the detailed timing block, and it does not work? Quite a sad situation, especially when a product costing only one tenth can do it with relative ease.

4. Would you kindly share the timing parameters used in getting HX2 to work at different refresh rates?

Thank you and best regards.
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post #209 of 255 Old 12-17-2005, 05:06 PM - Thread Starter
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Originally Posted by mariner888 View Post

3. I'm not sure what to make of the 50Hz judder issue with HK2K. It's defined in the detailed timing block, and it does not work? Quite a sad situation, especially when a product costing only one tenth can do it with relative ease.

4. Would you kindly share the timing parameters used in getting HX2 to work at different refresh rates?

Where is it defined for HD2K? In the EDID? I just heard someone tried and failed, but you never know, maybe that person had trouble for other reasons. For HX1 there was a document at www.jvcdig.com where they had timings for 50Hz. It synched, but then there was still judder and tearing.

For HX2 just about anything seems to work fine for 48-60Hz. The timings I use for 50Hz are:
Code:
PowerStrip timing parameters:
1400x788=1400,240,112,248,788,1,3,58,85000,1

Generic timing details for 1400x788:
HFP=240 HSW=112 HBP=248 kHz=42 VFP=1 VSW=3 VBP=58 Hz=50

Linux modeline parameters:
"1400x788" 85.000 1400 1640 1752 2000 788 789 792 850 +hsync +vsync
I played with 48Hz, but did not save the timings. Both TV and DVD is 50Hz and 48Hz looked so similar I just stick to 50.
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post #210 of 255 Old 12-18-2005, 11:18 PM
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Hi arca,

Thank you for posting timing details. You have modified both the HFP and pixel clock to arrvie at perfect 50Hz refresh. Would you like to share with us how you came up with such an inspired choice?

I believe we are refering to the same document (040401HD2K_60p50p_Timing.pdf) for HD2K 50Hz timing. I had assumed that came from the EDID, was it not?

Was quite impressed when I saw that initially, because so few products had timing details defined for different refresh rates. This only highlights how an indispensable tool Judder Test is.

Thank you and best regards.
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