
Are You Getting All the Resolution You are Paying For? More Tests
In the November 2006 issue of Home Theater Magazine the HD Guru tested 61 new HDTVs using the 1080i HDTV format that most of the HDTV channels use (including CBS, NBC, CW, MTV HD, and Wealth HD), as well as the current HD DVD and Blu-ray disc players. The question was, does the latest crop of HDTVs retain all of the detail in the broadcast or HD disc and send it to the screens at its native resolution? Or do they fail to properly handle the signal, cutting the image resolution down by as much as 50 percent?
Deinterlace Test
The 1080i SMPTE 133 test pattern from the disc contains an image. In the corners and to the right of the middle of the image are boxes with alternating horizontal black and white lines a single pixel high. (See the illustration at the website listed at the end – note: some detail was lost shrinking the image to fit the web) The TV sends the white lines (odd numbered) to the first field, and the second field contains the black lines (even numbered). To add a motion component (proper deinterlace of still frames doesn’t count since we are dealing with “motion” pictures, not a slide show), a clockwise rotating white line is positioned on the left side of the pattern. If a given display properly processes all of the lines, the pattern’s alternating horizontal lines should remain intact. If the display only shows single 540-line fields (all odd- or all even-numbered lines) and up converts to the TV’s native resolution, the boxes will strobe all black and then all white. If this occurs at any time, I give the display a “fail,” because the display only works with half of the available information as it strobes.
3:2 Tests
Many scripted television and all film-based movies that telecast in 1080i HD are recorded at 24 frames per second. For broadcast, this is converted from film or 1080p/24 video to 1080i/30 using a telexing conversion. A good internal processor should use a method called HD inverse telexing to recognize like frames and reconstruct them for a 60-frame-per-second display using a 3:2 cadence. If the processor reconstructs the image properly, you’ll see all 2-million-plus pixels of information in the original source material (on a 1080p display). A 720p display will down convert the full 1,920-by-1, 080 images to 1,280 by 720. Without HD inverse telexing, the television’s processor may discard up to half of the image resolution (prior to conversion in 720p displays) during horizontal pans. So, regardless of what you may have read elsewhere-or what your local TV-store sales clerk has told you-if a 1080p display’s processor is capable of content based on HD 3:2 inverse telexing (and properly deinterlace, as well), you can see all of the content in full 1080p resolution. You don’t need to wait for 1080p broadcast or HD DVD disc players with 1080p output to do so. This test also uses the SMPTE 133 pattern (without the addition of the rotating white line) panned right to left and back again at 24 frames per second. The Silicon Optix 1080i HQV HD DVD is mastered at 1080i/30 with a 3:2 cadence inserted, like any 24-frame film transfer to video. If the processor properly handles the signal, the boxes with the horizontal lines described above will remain intact. If not, either the boxes will strobe between all black and all white (as with the deinterlace test), or you will see vertical bands on the sides of the box. (See image directly below) Stroking or banding constitutes a “fail,” as resolution will drop during motion.
Bandwidth Test
I performed this test on the 1080p displays. The SMPTE 133 pattern has boxes with alternating black and white vertical lines. The lines in five of the boxes in the test signal are one pixel wide, representing the finest detail in a 1080i signal. If the display passes the full bandwidth, you’ll see vertical black and white stripes. If there is an attenuation of the signal-which may translate into a loss of some fine detail in actual content-the lines will appear as dark gray alternating with light gray. If you can’t see any lines, the display is not passing any fine detail to the screen. This means that a display can be native 1080p, with 1,920 pixels across, but no detail that is one pixel wide will make it to the screen. I’ve noted the sets that showed some signal attenuation with “some.”
The Results
The 14 2006 models came from eight vendors and include new brands such as Visio and Olivia. All results are based on factory default settings. Please note the new Sharp 62 series models tested omit a menu button on the television. These were in-store tests. The major retailers no longer provide remote controls on the sales floor, preventing an opportunity for the HD Guru or anyone else from changing the picture settings from factory default.First up was the deinterlace test. The bad news, only 7 of the 14, 50% latest 2006 models passed the test a fraction of a percent less than passed the tests of the 61 2006 models. The good news is all the Mitsubishi and the Vizio plasma passed this tests. The 3:2 test were a disaster, with only 14.28% of the 14 (2 of 14) sets tested passed. With 85.72% failing this is higher percentage than the 80.33% fail rate of the last go around. . The two passing models were the Vizio plasma and one Sony LCD flat panel. See the previous tests for more Sony results. The 1080 bandwidth test applies only to the seven models with 1080p resolution. I would have preferred to see some of the sets pass single pixel on/off test pattern without attenuation, but “some †is better than none of the test signal. While good signal processing for proper deinterlacing, 3:2 conversion, and bandwidth is extremely important to obtain a superb high-definition picture, there are some other factors-including contrast ratio, motion lag, and black level-that make big differences in picture quality. Use the chart to find the sets that pass, and then compare the passing sets with other displays. If the other factors are about the same, the HDTV with the proper signal processing will produce the better image.
Key
NA=Not Applicable
768p= the 768 line resolution
Parts of this article are reprinted with permission of Home Theater magazine. For the complete version including earlier test results of 61 displays go to http://www.hometheatermag.com/hookmeup/1106hook/index.html
Make | Model | Type | Deinterlace | 3:2 | Bandwidth |
---|---|---|---|---|---|
Mitsubishi | LT37131 37″ | LCD | Pass | Fail | Some |
Mitsubishi | LT46131 46″ | LCD | Pass | Fail | Some |
Mitsubishi | WD457 57″ | DLP | Pass | Fail | Some |
Olevia | 227V 27″ | LCD | Fail | Fail | NA 720p |
Panasonic | TH65PX600U 65″ | Plasma | Pass | Pass | Some |
Samsung | 4676S 46″ | DLP | Fail | Fail | NA 720p |
Samsung | LNS4695D 46″ | LCD | Fail | Fail | Some |
Sharp | LC42D62U 42″ | LCD | Pass | Fail | Some |
Sharp | LC46D62 46″ | LCD | Pass | Fail | Some |
Sony | KDL32S2010 32″ | LCD | Fail | Pass | NA 768p |
Sony | KDL40V2500 40″ | LCD | Fail | Fail | Some |
Sylvania | 6637LCT 37″ | LCD | Fail | Fail | NA 768p |
Sylvania | 842THG 42″ | Plasma | Fail | Fail | NA 768p |
Visio | P50HDTV10A 50″ | Plasma | Pass | Pass | NA 768p |
Greg Tarr
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I used to use 42″ Sony Wega. In common I like it but don’t know about “picture settings (brightness, hue etc.)”
We have a 42″ Sony Wega. We have just installed the HD receiver from Direct TV. The picture just doesn’t seem as crisp as it should for an HD picture. Do you have suggestions for a rear projection on picture settings (brightness, hue etc.)? Thanks –
Thanks Gary for bringing this issue to our attention.
Using the free test patterns found here:
http://www.avsforum.com/avs-vb/showthread.php?t=707769
I have concluded that the Philips 42PFL7422D/37 should PASS the deinterlace/pulldown test when ‘Noise Reduction’ is set to OFF. From the manual, it sounds like ‘Noise Reduction’ is intended for analog signals. It seems using this function results in ‘bob’ deinterlacing. Also (of course) the resolution of 1-pixel lines is only accurate when the set is in 1:1 mode (called Unscaled on the set.).
Would appreciate if you could keep these finding in mind the next time you test/update the table.
xnappo
I would like to know what I am watching, what I actually see. I have a Samsung 720P plasma in my family room and a Samsung 1080i in my bedroom. I am using an antenna mounted in my attic space to receive local HD broadcasting. I noticed that some channels (4 NBC & 11 CBS) broadcast in 1080i, while others (7 ABC & 16 FOX) are broadcasting in 720p (At least this is what the info button on my TV remote is informing me). While watching my 720p in my famiily room, viewing channel 4 (NBC) which is being broadcased in 1080i, do I get to see 720i or 720p since my tv set is a 720p? An if I’m watching a 720p broadcast in my bedroom which is on my 1080i tv, am I actually viewing 720i? Hope this makes sense because I really would like to know.
Also, will the purchase of a HD or Blue Ray DVD player really make a big difference since my sets are 720p & 1080i (providing that I rent or purchase HD disk? I live on a budget but like certain toys :). Robert
I found your site very helpful…I am in the market to purchase my first lcd HD flat screen….I really like the new Sony 46 KDL-XBR4 and found a great price…I have not seen any reviews on the newer models and hope Sony has fixed the problems of the past…do you have any reviews on the XBR4?
Thanks….I am also in the market for a good surround system….any suggestions?
Done. The first KDL-46XBR4 review is up. Please check it out.
Sound system depend on budget, room size, you desire to play at a given level and decor. To may variables to make a suggestion.ÂÂ
The HD Guru ÂÂ
I would like to share this experience; I switched from plasma to LCD;from a Philips 42″ pixel plus to a Sony 40″ 1080p v2500. I got put down at home,there’s just no comparison on resolution. The blur on the Sony even at HD is terrible and even more expensive. I have monster cables/and a power conditioner that helped the plasma better. I regret what i did, and plan to buy a pioneer PRO940 42″ plasma since their price is now lower with a 2 year warranty.
HD Guru;
I purchased 3 Samsung Slimfit TSX3082WHX CRT 30″ TVs and I absolutely love them. Is there an advantage to having a CRT over LCD and Plasma? Can I view the Native 1080i picture without any deinterlacing or conversion?
Advantges of CRTs include native resolution of 1080i (no deinterlacing or downconversion), excellent black levels and low cost. Aside from the weight and bulk, the disadvantages of CRTs are: lower screen brightness (as compared to plasma, LCD and microdisplay) and detail is restricted to the number of holes in the shadow mask (typically about 800 across in a 30″ CRT) Being an analog display device the 1080 scan lines tend to overlap, also lowering the display’s ability to render fine detail.
The HD GuruÂÂ
in December, I purchased the Pioneer 1140HD plasma screen tv and obtained the Cablevision Optimum IO HD cablebox. Enjoying high definition broadcasts for several months, I could not wait to watch NY Mets baseball game telecasts. My first opportunity to view HD baseball this season was the Yankees’ opener. Filling my 50″ screen, I viewed a rich almost 3D 1080i broadcast – surely the NY Mets would leave me in awe when I would watch their game. Not quite. While the SNY pregame desk featuring Lee Mazilli was dazzling, the game itself was presented in 4:3 aspect ratio with a far less than HD detail. Please explain what’s happening. While the YES network showed the Yankees’ opening game in 16:9 aspect ratio in easily recognizable high definition, the SNY HD broadcast was far less stellar. Why??? Knowing that my set is configured correctly and that Optimum is carrying SNY in Westchester (White Plains), it can’t be them. So – that leaves SNY as the culprit.
Thanks!
Bruce
In the past, home games and studio are in HD, away games are in SD. This was probably the case. The Yankees opened at home, the Mets were away.
The HD GuruÂÂ
Guru,
Thanks for all your advice and for setting up this site. There so much useful info here!!!
What about Samsung HP-S4273?
How does it stack up against other two? I was in the best buy yesterday and Samsung looked pretty good and sharp. Does this model properly deinterlace and does it have good 3:2 pulldown?
Thanks,
Dejan
I have a question regarding the importance of 3:2 signal processing.
Don’t most DVD players now days already have 3:2 pulldown processing so the signal sent to HDTV is already converted to proper format for displaying?
Is this issue at all with TV programing?
I noticed that Panasonic does not have 3:2 pulldown on their 42″ plasmas while Hitachi appears to have them, not sure about Samsung?
I do watch a lot of DVD’s(movies) and I am planing to get DVD player that can upconvert to 1080i.
I am currently looking to buy 42″ plasma and my choice has come down to these three:
1. Hitachi 42HDS69
2. Panasonic TH-42PX600U
3. Samsung HP-S4273
Have you reviewed any of these and what would be your pick?
Thanks,
Dejan
The Panny and Hitachi are two top picks
Panasonic has deeper blacks and higher contrast ratio with a 1024 x 768 resoultion
Hitachi has a 1024 x 1080i resolution, but not as deep blacks.
Sitting closer with more room lighting I would pick Hitachi
Sitting further from the screen (see the HD Guru chart for guidence) at lower ambient light levels give the Panasonic the edge.
The HD Guru
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Thanks for the response. The other question I have is about the built in TV Guide channel with the Pioneer PDP 50. The manual says “TV Guide may not be available in all areas. As content providers move to digital programming and broadcasting, TV Guide data may be unavailable or become unavailable” I have never gotten this feature to work. It seems odd to me that an advanced TV would include a feature that will be obsolete as the signals move to a digital format.
And to follow up, because the Guide did not function on the Pioneer, coupled with the picture quality and popping sound (it was from the internal speakers, BTW. I have the TV hooked up to a Bose 321 as well, with no popping whatsoever.), I have decided to go to an HD DVR box with HDMI connections. Thanks again.
Guru, I have truly enjoyed your website and check it daily, I own a Pioneer PDP-5071 HD plasma and just had a Cablecard installed. I am with TimeWarner Carolina (Charlotte) While I am happy with the lack of wires now (and one less remote) I feel the overall picture is poorer than with the HD box. The technician informed me that the Cablecard technology needs to catch up with TV technology. Have you heard anything like this? Also, the speakers are making a loud popping noise everytime I change channels. Any suggestions? (other than calling Pioneer/Best Buy?) Thanks for the info!
The techician is full of ****. If the image is poorer than with the box I would have another tech check your signal level. Perhaps you have different picture settings on that input? It is hard for me to say without seeing it, but I assure you, a built-in CableCARD tuner will provide an image that is equal or better than using any external cable box. If this is not the case something is very wrong somewhere.
As for the popping sound, this should not occur. You do not mention if this is coming from the internal speakers or the audio output. Regardless, I suggest contacting the retailer or Pioneer.
The HD Guru ÂÂ
What are you’re thoughts on the new Vizio GV47L HDTV LCD reviewed at this years CES? The tests here list the 50″ Plasma by Vizio, but the link provided shows no Vizios. I can’t assume because the plasma passed the LCD would. Any information would be great. Thanks.
Sorry, I haven’t tested the Vizio LCD and you can not assume it will pass or fail.
The HD GuruÂÂ
So basically manufacturers have been lying to consumer’s faces about their tv’s that fail the 3:2 pulldown and/or deinterlace tests? Why isnt anyone doing anything about it? Isn’t this fraud?
Many manufacturers simply do not make claims about properly deinterlacing 1080i. The ones that do make claims, (such as Pioneer, JVC and Hitachi to name three) have passed the tests. Ditto for 3:2. ÂÂ
The HD GuruÂÂ
As a New Media inventor, I am hoping someone will move foward in the Organic LED (OLED) manufacturing.
OLED is vastly superior to the poor quality “HD” flat screens people are being hoodwinked into buying. Your site identifies most of the bunk.
OLED screens benefits are:
1. Very lightweight
2. Consume a miniscule amount of energy (even battery capeable
3. Very bright
4 Very colorful.
5. Fast Fast Fast.
6. Able to show HD even in Stereo (3-D)at 120 frames per second.
As a developer and producer of interactive Stereoscopic (3d) I eagerly await the manufacturer with enough guts to jump into production. It is likely the laptop market that will be the first adopters as the screens will get 10x longer run time in a typical unit. Once they are in mass production, All of these “pretend HD TV’s” will be trown away.
The problem is much like the automobile industry: Manufacturers are invested in the production of Plasma and LCD units and want to “Milk” their maximum return on the initial tool-up investment currently in use.
I still use a standard CRT for everything.
thanks for the input guru
**
i live in new orleans and called one of the high-end a/v stores and talked to the manager. they don’t carry the jvc, but do have the hitachi 37 ” you discussed. when i told the manager my situation, he told me that i should stick with the sony as i wouldn’t notice much of a difference. i read over the test results you posted and it seems that the hitachi would perform better. why would this supposedly very knowledgeable person tell me there wouldn’t be much of a difference?
hi
i just bought the sony kdl40v2500 afew days ago and am a little underwhelmed. now i find this site and see that it failed both the de-interlace and 3:2 test. is this not a good tv? can you suggest a smiliar sized/priced lcd that is better ?note that i can’t use plasma due to the amount of sunlight my room gets
Consider the JVC or Hitachi I wrote about. They both pass my test and handle fast motion. Or consider some window treatment (curtains or blinds) and a plasma.
The HD GuruÂÂ
I was wondering if you could please provide a link to your HDTV test results. I’m especially interested in the deinterlace and 3:2 tests you performed in the Home Theater Magazine article mentioned above. It’s very difficult to find this information on your site and it would be nice to have a quick link that is updated as you review new displays. Your test results are critical to my purchasing decision and I really appreciate your willingness to share your knowledge. I live out in the middle of no where so it’s not feasible for me to go to a store and judge for myself. Thanks for a great informational site!
Pat
HD Guru,
Would you recommend using a separate video scaler to overcome some of these TV’s limitations?
Thanks!
z
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Only if your display has a “Dot by Dot” (sometimes under another term) aspect ratio that bypasses the set’s internal scaler. If this is the case you will see an improvement in the image using a better extenal scaler (I reviewed three a few months ago in Home Theater magazine).
 If not, (many displays do not have this function) you will not get any improvement by adding one.
Check the owner’s manual or the display manufacturer to learn if your display has this mode.ÂÂ
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its neat that you are willing to help folks with there new technology, that sales can not do…this day in time we need people like yourself, which is a rare breed… thanks i learned alot, and spreading the site around.
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The HD Guru
I istaled a Viewsonic 32″ HD TV with aScientific Atlanta HD cable box from Time Warner. I use a HDMI cable. Problem is the volume and on/off of the tv cannot be controled by the cable remote. Using two remotes is a bear. Apparentyl it is a lack of software in the cable box. Any suggestions?
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Get a Harmony remote. They work great, are easy to program and I found one through pricegrabber.com for undr $80.
Problem solved
The HD Guru
Thanks Mr Guru for all your testing efforts,
but I have one question regarding your recent
Sony results.
I would have expected the v2500 to pass the de-interlace test since its better cousin
(xbr2) passed your test with “DRC = off”. Can
you clarify ?
Thanks in advance & keep up all the good work !!
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The v2500 does not have the same DRC circuit, it does not have an options including off like the XBRs
 The HD Guru
HD Guru,
You are a welcome sight! I can not seem to find anyone who REALLY knows what they are talking about when it comes to HD!
I recently purchased a Pioneer PDP 5016HD set (50″). I have HD cable service and I see a lot of what I would call “noise”. This is really evident on wide angle sporting events such as football (green fields) and basketball (court/wide crowd shots). I do not notice this as much if at all on close up shots, but it is there. Grahpics seem clear. Motion certainly brings out the problem.
I have the set powered through a Panamax M5100 EX (which I probably would not have purchased after reading your insight). Also, the set is using an HDMI connection. The cable company has been out at least 6 times and says it is not their issue. The power company has checked our connection at the road and even at the panel box. They say everything is fine…but the picture is not! I know I did not buy the best technology available, but I think it should be much better than what I have! Can you offer suggestions? Would Direct TV help?
Thanks!
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What you are describing sounds like MPEG-2 compression artifacts. They could be part of the original signal or exacerbated by your cable company if they are not delivering all the bits in the signal, see my interview in the Chicago Tribune I posted about this.
Here are some suggestions.
Your Pioneer may have a MPEG 2 noise reduction circuit, check your owner’s manual to find out and engage it.
Assuming you are in an area with over-the-air HDTV try your local HD channels and compare them with the signal via cable.
I can’t advise you on the feasiblity of this since I have no idea about reception in your area, your local brodcaster may be able to advise you.
Beg, borrow or buy a HD DVD or Blu-ray player and connect it to your plasma. The beauty of the HD discs is the bit rate is so high (with more robust compression) they have little or none of these artifacts. This will confirm what you are seeing are compression artifacts.
Sit further back (they will be less noticibleable, I know “big help”) lowering the sharpness control may also help. I assume the plasma is already in movie or cinema mode if not put it there.
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thanks JUMBOshrimp ill check it out
I bought the magazine for this full article and it has me scared about buying a 1080p display.
Will you continue updating your results as you test new models? I’m sure we’d all like to see an HD Guru approved list as well.
Thanks for showing how poorly engineered many of these sets are and keep fighting for quality products.
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Yes, there is plenty more to come.
The HD GuruÂÂ
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to frank — Look at the KDL-46V2500 it’s 500$ less and uses the exact same processing engine. The money comes from losing the floating glass bezel and 1 HDMI input other than that it’s identical. I got mine for 2700 (including shipping)
hd guru was wondering if i should set tv,receiver,to progressive out to get best picture.and if video convert should be on.also having problems with hdmi from receiver to tv.no audio tried everything in manual.also is it possible to get digital audio From cable box to receiver instead i have analog audio.i have a sony grand wega 70inch tv,sony da-7100es reciever,and ns9100es dvd player.want the most from my system any suggestions.thanks jeff j
I am debating on purchasing a Pioneer Elite PRO-1140HD 50″ or Sharp Aquos 52″ AQUOS® LC52D62U.
Plamsa or LCD 1080p.
The Pioneer has alot of neat features (being able to stream video directly to the tv from my network) but it is not 1080p where as the Sharp claims to be 1080p. Before I looked at this Pioneer I thought I wanted a 1080p, but now I am not so sure.
I am stuck with this decision and any recommendations?
Thanks
have you ever tested or reviewed sonys bravia kdl46xbr2 1080p lcd ? iwould like to know if i got my monies worth. your input would be very helpful.thank you!
Should I assume that an older (2004) model 65″ Mitsubishi HDTV would fail any of the tests you describe to test whether or not I’m getting all I should be getting?
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You don’t say if its a DLP or a CRT. CRTs are all interlaced so if it is, don’t worry, be happy. If its a DLP, sorry Mitsubishi did not change processing to properly deinterlace till the current 2006 models.
The HD Guru
I have a dvd that sets the resolution to 1080i using a hdmi and my tv also displays it as 1080i. How can I tell if I am getting the full quality ? (the brand I have is Olevia and also, on the test sheet you said Olevia failed but I did not see that brand on the home theater web-site)
I’ve got a Olevia 32inch and you said that the 27 failed. does the size that I have matters, and do I need to go get my money back?
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It is not possible for me to test every make and model HDTV on the market, and run a website. I suggest contacting Olevia and asking them which make and model processor (scaler chip) your set uses and which one is in the 27″ model. If it is the same one as the 27″ the results will be the same. If its not you may be able to determine its capablities by going to the vendor’s website and looking up the scalers specifications.
The HD GuruÂÂ
I have the Panasonic 42px60u plasma it passed the deinterlacing but it failed 3:2 test and bandwidth test. What does this mean that it is not a hdtv or hdtv with faults?
I have a ‘used’ NEC PX-50VP1A (50PD1) 50″ Plasma that came from a theatre lobby. It turned on for a few minutes then went to “standby” and won’t come on again. I’m looking for service material…manuals/schematics. Any help you can offer would be appreciated.
I noticed you said the Pan 65PX600U passed the tests…but on the table in the article on home theater site, this model is not even listed as being tested.
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Its on my list within the blog
The HD GuruÂÂ
Looking for a good explanation of Contrast Ratio.
“it will not have any bearing on the test results as they are not aspect ratio dependent.”
But your tests could have failed simply because they were being anti-aliased and therefore run through another filter circuit, no?
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The sets ability to properly deinterlace 1080i and 3:2 detection with motion present, is independent of the aspect ratio control circuit on every television I have tested. ÂÂ
The HD Guru
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plasma or lcd panel? need i be concerned with burn in i have a 50 zenith{lg} late 05 model . also i find i have a much better analog and dogital picture from my 20in lcd panel is this true to the fact or is it because the lcd is smaller. in short im in the market for another 50 panel in your opinion should i go lcd or plasma again i find the plasma hd picture slightly better but lcd hd certainly ok. also notice vizio passed your test would you reccomend this product over other popular brands in short what specific brand and type would you bye $1500-$3000
Au contraire “HD Guru”. Try page 30 > Display Area > Full Pixel.
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I stand corrected, its there. This mode is a 1 for 1 aspect ratio, eliminating overscan. It will prevent one from seeing aliasing artifacts on native resolution test signals and content, however, it will not have any bearing on the test results as they are not aspect ratio dependent.
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Found it…
http://www.hometheatermag.com/hookmeup/1106hook/index.html
The link to hometheatermagazine.com no longer appears to access the article. Any suggestions on how to locate the story on their site?
Thanks!
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Thanks for bringing this to my attention. The link is now fixed.
The HD GuruÂÂ
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Concerning the Sony V2500, was the set in “Full Pixel” mode when testing the Deinterlace and 3:2 tests?
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The television was set to “full” aspect ratio. I did not see any item in the user interface that is labled “Full Pixel Mode” nor does it appear in the owner’s manual at the Sony website.
The HD GuruÂÂ
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Dear Guru: could you please tell me the pros and cons of SONY SXRD. thank you