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The Secrets Blu-ray Player HDMI Benchmark - Part I

ARTICLE INDEX

Conclusions and Industry Feedback

When Secrets of Home Theater and High Fidelity began publishing the DVD Benchmark, issues like Chroma Upsampling Error (CUE) and improper cadence detection were common, but now those issues have been mostly eliminated, since manufacturers have a reference to achieve. We hope that our new Blu-ray Player Benchmark testing, using the HDMI output, can help to lead manufacturers to the same level.

Following, are comments from industry representatives:

SpectraCal, makers of CalMan calibration software:

"Over the last couple of years display manufacturers have started listening to our requests for better control over their displays to attain greater color accuracy. For the ones that are working with us the results have been impressive; however, if the sources are unable to produce the same performance it becomes a major bottleneck in the video system.

Our customers frequently contact us regarding poor source decoding. It typically happens when they are relying on their optical player as a reference source to calibrate their display's grayscale and gamut instead of using a reference pattern generator. This is a major issue as many of our customers' primary content is watched from their optical player and because color accuracy is most critical to their experience. What we end up telling our customers is, "if you rely on your optical player (Blu-ray or DVD) as your primary source and you use it to generate reference test patterns from a pattern disc to calibrate your display(s), there is no guarantee you will end up seeing the content as it was originally intended. This is due to the possibility that you will have improper source decoding and perceivable deltaE in output levels. If this occurs, your entire video chain including the display will not be calibrated properly and the quality of the original content will be lost." This advanced testing will help consumers to avoid these issues and get the most out of their system."

HDMI.org:

"The HDMI Specification defines a clear data protocol that allows test equipment makers and product reviewers to get detailed, accurate information on how a product behaves", said Jim Chase, Director of Technology at HDMI Licensing, LLC. "This feedback allows product manufacturers to achieve a greater variety of product options and a higher level of performance and quality than previously attainable."

Tom Huffman, ISF and THX Certified Calibrator, maker of ChromaPure calibration software:

"The testing that Secrets has done provides consumers with significantly more information than was previously available about the performance of Blu-ray players. It is important to see how well color information is transmitted to the display at different levels of stimulus as this better reflects real-world performance."

We want to acknowledge the direction and contributions of Stacey Spears and Stephen Hornbrook, developing and executing the new SECRETS Blu-ray HDMI Benchmark approach.

The SECRETS review results for Blu-ray players utilizing this new Blu-ray Player HDMI Benchmark as integral to the reviews, begins in June.

FEATURED COMMENTS

What Quantum Data equipment do you use
Written by Kim Fredtoft , May 23, 2011

Very impressive, and something I've long wanted to do myself, but newer found the equipment (and budget) to do.

What piece of Quantum Data equipment do you use to monitor the actual values on the HDMI output of the players, and what is the approximate cost?

All the best

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Quantum Data
Written by ChrisHeinonen , May 23, 2011

We used a Quantum Data 882 HDMI Analyzer and I don't have the exact cost, but it's in the neighborhood of $16-18,000. I looked into as many other analyzers as I could and you lose either the ability to look at HDCP data, or you lose the ability to analyze all colorspaces and so they weren't able to work for us.

Just as important, however, is having access to the test patterns that allow you to know what data you are looking for as otherwise you're just guessing as to the values of the original source data.

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Please, bench PS3!!!
Written by Onesolo , May 23, 2011

Are you going to bech Sony PS3 (fat and skinny) ?!?! Hope so...

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    PS3 Bench
    Written by ChrisHeinonen , May 24, 2011

    On our next batch of player reviews, we will try to bench the PS3 as well for reference. I'm not sure when this will be, but we will try to get it included as we know that's of interest to people. I believe I have access to both an original and updated version as well, so we can do that.

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    What about the Pioneer BDP 51?
    Written by Paul , May 24, 2011

    Please test this player under your new "testing guidelines". I, as well as many other Pioneer owners would be very curious to know what/if any, delta errors this players has.

    Thanks

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    Pioneer BDP-51
    Written by ChrisHeinonen , May 24, 2011

    Paul,

    I reviewed the Pioneer a long time ago, but I don't have one around now to use for testing, and Pioneer wouldn't have any samples to send us at this point for testing either. We do have a couple of Pioneer players coming up for review soon so you can keep on the lookout for those, as they do use this new testing format. The only other player that I have easy access to beyond the PS3s at the moment that we haven't reviewed is an LG 570, which I will try to bench next time for reference. Thanks.

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    Yes, please benchmark the PS3
    Written by Helen , May 24, 2011

    Yes, please benchmark the PS3. I have the skinny one and am very curious how it measures.

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    Ah gheez..
    Written by Kevon Manuel , May 24, 2011

    I really wish I didn't see this article. I just got over my excessive tweaking stage. Now every bluray movie I watch I'll have to pause and tweak..thanks, dude... thanks.

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    Confused
    Written by Paul S , May 24, 2011

    I'm a little confused with the numbers. You state for the Sony, Cb Reference and Actual as 1 and then state a deviation of 3.7?

    How does that work?

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    Typo or misprint or ?
    Written by larry , May 25, 2011

    The chart for the -83SE shows no errors for both YCbCr formats and RGB. The text below the chart says "Looking at the Oppo BDP-83SE, the data are spot-on. The dE in the output stays near 0, with an average dE of 0.1 for RGB.

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    Answers to some questions
    Written by ChrisHeinonen , May 25, 2011

    Some questions have come up here, or at other sites, so here is some clarity.

    Stacey Spears Involvement: Stacey Spears and Don Munsil created a new series of test patterns that display the full range of RGB and YCbCr data in 1 step increments. These patterns aren't generally released yet, but I believe they will be coming later this year from them. We have a set of them on a burned BD-R, and actually we couldn't test one player since it couldn't read a BD-R disc.

    The testing was done at Stacey Spears house, with him assisting us as he knows the QD machine much better than we did at that point. For data that seemed very strange (like the Sony player), we ran the tests multiple times and had the same data output every single time, so we could be certain that what we were seeing was correct. Stacey didn't do the data analysis, but after we found what the best and worse performing players were, we did use his theater (Joe Kane certified Samsung Projector and Screen, totally light controlled) to compare them more, and see what differences we could spot.

    Source Direct mode: The reason for wanting source direct mode with 4:2:2 output is simple: It's the least processing you can do to the 4:2:0 data, and then you can use an external scaler from Lumagen or DVDO to scale all content to your desired resolution and colorspace. If you don't have source direct, you run the risk of introducing more errors before the scaler, and defeating the purpose of the scaler as well.

    Numbers that don't match in the chart. This is the harder one. For example, if we are looking at the Red chart for RGB, while the Red value is what we are focused on, there are still G and B components to that, we are just less concerned with them. However, you can have a value where you are looking for Red 0 and get Red 0, but Green should be 15 and you get 14, or Blue should be 8 and you get 9. In this case the Red value is correct, which is our primary focus, but something else is a little off so you can get the reference value, but still have a very small dE 1994 introduced.

    With the Sony Cb and Cr data, since you have to use the Y data to convert from YCbCr to RGB, and then be able to calculate the dE 1994 value. Since the Y value on the Sony is so far off, even if the Cb and Cr values are decoded correctly, the resulting data is still far off due to the Y value. This is confusing in the chart but I didn't have a better way to display it without having far too many numbers, but I will try to come up with something. I felt that since dE is a concept that readers are familiar with from display and projector reviews, presenting the data as a dE value would be easier to understand at a glance.

    As far as hard data versus personal viewing, both have a purpose in the world. Visual errors are harder to pick up on Blu-ray compared to DVD, and to most people they will look almost identical among players. However, once you start moving up to larger and larger screen sizes, you can start to notice them more than before, or you can have other items in your chain that can cause issues that you couldn't see before. If I have two players and one is outputting the correct numbers and one is outputting the incorrect data, wether I think one looks better or not is unimportant at that point I feel. I can adjust my display to make things look how I want, but if my source is incorrect then I'm at the mercy of that component for how everything downstream from it looks. I can't recommend something that works incorrectly to people and feel good about it.

    The reason we had a Sony S570 available for testing is that I bought myself one for my bedroom last year. It's only been used with a 32" TV and so I never compared it to my Oppo, but I can't recommend that player to people anymore, and some of our reviewers that own it can't use it for testing the video processing of a receiver or display anymore, since the output from it is so far off that you can't tell if the receiver is clipping WTW.

    I will try to check in a few times over the next few days and answer other questions that come up about this. I'm also working on a better way to present some of this data in the future. As each colorspace we test produces 768 data points, and some players can offer 8 sets of data (2 HDMI outputs, 3 colorspaces and Source Direct) to test, I'm writing some software to better present all the data than trying to manipulate it in Excel. Also, we can't really go back to old reviews to update them as vendors no longer have those models available for us to use, but our plan is to use it on reviews going forward. Thanks!

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    Sony S570
    Written by Terry Jensen , May 25, 2011

    I have used your reviews for years to make informed purchases. Needless to say I was more than a little disappointed to learn of the Sony S570 players flaws. Before I purchased it I read several reviews(good & bad)& went with your recommendation. What responsiblity do you have as reviewers when you make false claims. You have lost a good deal of crediblity with me! Terry.

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    ...
    Written by Tyler , May 25, 2011

    This is the kind of work that made me start coming to this site many years ago. Great stuff so far.

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    A flawed gem...
    Written by Jim M , May 25, 2011

    In spite of the "not so stellar" performance of the Sony S570...I still enjoy it and am glad I made that purchase. It is quick, reliable and plays SACDs wonderfully. Besides, how else can one justify another upgrade in the near future?

    Hopefully, this bench testing will motivate ALL mfgs. to really ramp up the quality of their products. This is good news for all consumers!

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    Oppo players
    Written by Ron W , May 25, 2011

    I have owned an Oppo BDP83 for quite some time now(soon to buy a "95")and it has been interesting to play around with the color space settings to see if there is any difference between them. The "Auto" function "seems" to choose the 4:4:4 color space, however, when switching to 4:2:2, as compared to 4:4:4, the overall picture seems ever so slightly brighter with a small emphasis toward the red. The choice of the RGB color space emphasizes red even a little more.

    Any thoughts on this and which of these settings might represent a more accurate representation of the picture, especially, when using a calibration disc for monitor grayscale and color setup?

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    Terry
    Written by stephenhornbrook , May 25, 2011

    We did not have this information available to us when the original review of the Sony S570 was Written. Based on the benchmarks that were our previous standard, the Sony performed very well and was easy to recommend, especially given the price. While these test results are very important, the flaws present in the Sony players are only visible under certain conditions and for the most part, our eyes cannot detect the luma and color errors on NORMAL viewing material. Where this is a major problem, is when using the player as a source for calibrating a display.

    I'm sad to hear we have lost credibility with you, but I feel like, if anything, we should have gained more credibility with these test results.

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    Sony S570 and Colorspace
    Written by ChrisHeinonen , May 25, 2011

    Terry, I too bought a Sony S570 for myself and that it the one that we tested. We certainly weren't alone in the department of recommending it, but going forward we are going to use this type of testing. HDMI performance has been a black box up until now and we're trying to open that box up to see what's actually going on.

    For choosing a color space, the Spears and Munsil disc is very useful for this I find. There are a couple of patterns, the chroma multiburst and plate, that I come back to a lot for testing. If there is an error with those colorspaces in your display chain usually the high frequency detail will be missing, or muted in color. Additionally they have a needle pattern on there that is designed to help you choose the correct colorspace. If you don't have their disc, I recommend picking it up and their website has details on using it to choose the correct colorspace.

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    Error in player vs. error in display.
    Written by Jeremy Anderson , May 26, 2011

    ChrisHeinonen's post raises a question that I was never able to get a concrete answer on. I'm running an Oppo BDP-83 on an Epson 8500UB projector. When displaying the Spears & Munsil disc's chroma multiburst, the only color space on the Oppo that reproduces the high frequency detail completely is RGB. So assuming the Oppo is sending each color space correctly, does this essentially mean that the Epson is losing chroma resolution when it does its conversion from 4:2:2 or 4:4:4 to RGB to send to the LCD panels? I'm assuming that feeding it RGB essentially bypasses any color conversion in the Epson, which could be why it only fully resolves the chroma multiburst when fed RGB.

    I had actually e-mailed the fine folks at S&M about this quite some time ago and they said they were going to run it by Epson, but I never got a response.

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    Chroma Multiburst
    Written by ChrisHeinonen , May 26, 2011

    Jeremy,

    In this case yes, the Epson is most likely doing an incorrect colorspace conversion and losing chroma detail when going from 4:2:2 or 4:4:4 to RGB. Is this signal going through a receiver before the projector? If it is, then it could be the receiver that is doing the incorrect conversion, as virtually every machine I've tested can do that.

    The fact that displays and receivers can do this is yet another reason that Blu-ray players should offer all colorspace options, as with your Epson you would only want to use one that uses the RGB colorspace, and can do the conversion correctly. The Spears and Munsil website has a nice guide to using their HD Benchmark Blu-ray disc showing the different things that can happen to the multiburst pattern, and what the causes of that are.

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    Arcam Flaship Bluray Player
    Written by silvertone , May 26, 2011

    Jeremy,

    Arcam seems to have taken a purist approach to their flaship bluray player, it'd an interesting comparison agains the Oppo. They compete in the same price range.

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    Arcam BDP-100
    Written by das , May 27, 2011

    Re the Arcam comment. Having observed this player first hand I believe that it manipulates the image in ways that cannot be bypassed i.e. sharpening, noise reduction etc. This has also been reported by some magazine reviews and owners.

    Arcam tell me the BPD-100 uses a Broadcom solution design that appears similar if not identical to the solution used in the Anthem Blu-ray player.

    Do they compete in the same price range ? Here the Arcam is twice the MRSP of the Oppo 93 yet lacks many of its features.

    I look forward to the Secrets review of the Arcam.

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    ...
    Written by JJ , May 27, 2011

    There were no false claims with the Sony S570. We were simply not able to perform the HDMI Benchmark tests in the original review, so were not able to detect its color errors which were only picked up recently when we obtained access to the Quantum Data instrument and its available tests. Some of us also purchased the Sony S570 based on the original review, so we have the same player with the same color errors that you have.

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    Sony S570
    Written by Nick , May 27, 2011

    I too purchased the S570 based on your great review. I am happy with the player, it is quick and fully featured for my needs. I am disappointed that SONY has introduced flaws into the player and I hope that this review comes to their attention and they may be able to resolve it with a firmware update, if that's possible. I thank you for including this player in your new testing and for sharing your results with us. Knowledge is Power!

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    Sony BDP-S770
    Written by p5browne , May 27, 2011

    Has there been a comparison between the 570 and 770? I understand there are differences in the electronics, and possibly the setups between the 2 Models?

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    Chroma Multiburst
    Written by Jeremy Anderson , May 27, 2011

    ChrisHeinonen,

    I'm running my BDP-83 through an Onkyo TX-SR1007, but with it set to THROUGH and with video processing disabled completely in the hidden menu. The AVR shouldn't be doing any conversion whatsoever, so I can only assume the Reon chipset in the Epson 8500 isn't handling color space conversion well. Then again, it seems very odd that this would be the case, considering how widely lauded the Reon chipset is. Fortunately, my BDP-83 and Xbox 360 both let me use RGB, but my digital cable box doesn't have that option.

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    What about AVRs?
    Written by Gotchaa , May 28, 2011

    ChrisHeinonen,

    Most ppl are switching thru AVRs and some of these that claim not to touch the video signal acutally do. Denon as an example allows you to turn on video conversion for analog sources only, which allows you to get the Denon Volume "Gui" overlayed even on digital sources like HDMI. I found that this introduced chroma errors using one of the Spears Munsil test discs. I am hoping you guys will be taking this up in your reviews and making recommendations for those that do not direct connect. We'd like to see this applied to the entire video chain. It would also be good to address the colorspace mode options the player, receiver, and display offer and what changing one option in the chain will do to the signal. I've seen ppl turn on various modes that are not consistent throughout the video chain, need to educate on this as well. Thanks for the good work

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    Pana 110/210/310 testing
    Written by Mike , May 28, 2011

    ChrisHeinonen,

    What an eye-opener. I have the BX37 (equivalent to the S370) and have been happy with it.

    Thanks for the review.

    Are you planning on testing any of the Panasonic DMP-BDT110/210/310 models

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    AVRs and Color Space
    Written by ChrisHeinonen , May 29, 2011

    Gotchaa,

    If you look at my review for the Marantz AV7005 you will see that we introduced a colorspace test for AVRs and Processors that we test now showing what they can handle. We are trying to get it into as many reviews as possible, but we actually had to pull most of the data from one upcoming review since the author had the Sony S570 player and as this testing discovered, we couldn't use that as a source and be certain of the results! Rest assured we will try to test AVRs and Processors for these same issues as they come through our writers systems.

    I believe we will also be able to do the same colorspace testing with displays and projectors as well. As Jeremy found, and as another one of our writers found, not all displays can handle all colorspaces correctly. My Samsung plasma does, but the one released a year later does not. I'm glad it does as otherwise I might be out buying a new display to be able to do all of this testing! The fact of the matter that as devices stand today, it has me seriously considering buying an external video processor that I know will do this all correctly, and only using my processor to handle audio in the future.

    As far as future models we will test, whatever we can get our hands on we will test. The Sony 770 has been replaced by a new model at this point so that won't be tested, but current model Sony players could show up for review sooner or later.

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    Still getting S570
    Written by Bee , May 29, 2011

    numbers are just numbers..Even the expert struggling to tell the difference under normal viewing material. why would i pay extra 300-400 for something that hardly there? peace of mind? not me..

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    Further impacts
    Written by Mark Vignola , May 31, 2011

    Bee -

    While I think there are many reasons to spend extra $$ for a player like the Oppo, this data isn't just splitting hairs - these errors can have very real and noticeable impacts on your content...especially if you use a test disc through a player like the Sony 570 to do even basic display calibration like brightness and contrast. Since most people aren't using a pattern generator, test discs through your disc player are by far the most common method used to get patterns to a display. Chris posted the following on AVS Forum highlighting why we need to care about this information:

    As far as noticeable, it didn't just off the screen with the Sony, but the WTW test result is just really bad when we know that the data is bad. It looks like the Sony is properly passing WTW data, but since all the WTW data has been squished below the WTW level, it's not actually passing it correctly. If you tried to set your contrast using this player, you'd run into two issues:

    - You'd have to really, really push the contrast level up to get the WTW boxes on a test disc to disappear, since they're so far below the normal level.

    - All other sources would look completely blown out because of it. Your Blu-ray data would be passable, but all highlights would probably not exist from your HDTV source and others..

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    Additional Comments
    Written by Stacey Spears , June 01, 2011

    The QuantumData used was the 882EA.

    The Sony players are compressing the full 1-254 range into 16-235, which is throwing away bitdepth / dynamic range. This also introduces visible banding. On top of the dynamic range compression, they are also applying an S-Curve. it is really bizare.

    The original reason for developing the RGB monotonicity test pattern was because of Pixar. Pixar noticed that their content was off by one level on a particular player. Our RGB monotonicity pattern is the first of its kind. Its not the first time someone has tried to build one, but the first time someone has actually built one that works.

    If anyone has followed the DVDO clipping problem, this pattern help identify the actual cause. It turned out to be the same problem that Pixar pointed out using one of their movies.

    Panasonic's RGB output on the DMP-BDT300 has an issue and should not be used. I have not verified the issue is still present with their latest firmware update, but their engineering team tells me it should be fixed in the generation after the BDT300.

    As far as Epison, my contact is no longer involved with them and they have not responded to my request. It is possible you are seeing what we are showing in our sample image (Chroma Multiburst - Multiple Conversions) in the Choosing a Colo Space article..

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    Just my 2 cents
    Written by Bee , June 01, 2011

    Mark

    Completely agree with you. Afterall people who would find/read this kind of website are more than just enthusiast i believe.

    I'm just saying here that people should less worry about their equipment and enjoy the movies more. Sometimes they do forget. With the kind of equipment we're talking about here you cant go wrong by far.

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    'bout time
    Written by ws , June 04, 2011

    Looks like I have a reason to start coming to your site more often. I used to come here for the leading-edge measurements of DVD players and Subs. Don't get me wrong, but the reviews of interconnects were totally opposite to that approach. Now it seems you're benchmarking again.

    Too bad it wasn't done 3 years ago. What took you so long?

    Congrats!.

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    Double Damm
    Written by AllanG , June 05, 2011

    Just bought the S570 about six weeks ago myself. Well! just will just have to save up for the Oppo-93.

    To the secrets team. Please keep testing for these errors on all new equipment. My faith is still with you. Looking at a Panasonic TCP-ST30 for Xmas. So don't you dare post without testing it. As a matter of fact the VT30 as well.

    Thanks again..

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    Anthem D2v test?
    Written by David , June 09, 2011

    I wish you go back and test high-end popular AVP's such as Anthems D2v or 50V with 8 HDMI input ports for color-space conversion accuracy to see how well they perform on the bench..

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    Processor Testing
    Written by ChrisHeinonen , June 09, 2011

    Next go-around, I will put my Marantz AV7005 on the bench to see how it does, and if we have anything else around we will try that out as well. I'm hopeful that we won't find any issues aside from the current colorspace conversion issues that we now chart for reviews, but will will test to see..

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    Signal tests are great, what about compatibility tests?
    Written by Michael C. , June 16, 2011

    People shoot their home videos on AVCHD and HDV camcorders, then they transfer these videos onto recordable DVDs (making what is known as "AVCHD disc"), on Blu-ray discs or even on any external USB media, and watch them on their BD player. I believe that all BD players have USB inputs, and some players have SD card or Memory Stick slots. So the question of compatibility arises.

    In particular, my Panasonic BD80 plays native 720p30 from an AVCHD disc despite that this frame rate is not legal for BD or AVCHD. It even plays 1080p60 from my camcorder, but when played from DVD it stutters. I know that the Sony S570 can play a bunch of formats including AVCHD clips and non-standard 1080p60 clips from variety of media including DVD, BD and USB-connected devices. And for those who look for playback of various formats, the S570 is a terrific device. It does not even require full AVCHD structure on media, it can read a single file.

    What I am trying to say is that your tests are great, but they are targeted strictly on audience that watches BD discs authored by big studious. This folk is in minority now. I bet that most people would prefer broader compatibility to pixel-perfect picture. So maybe this is what you have to look into for your next batch of tests..

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    Pioneer Elite BDP-09FD
    Written by BLUTRIG , June 17, 2011

    Would you like me to send my Pioneer Elite BDP-09FD for testing,it has 2 HDMI output,source direct,YCbCr,4:22,4:4:4,no SACD and I can send Pioneer Elite BDP-23FD.

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    Thanks for this
    Written by LW , June 18, 2011

    As an amateur calibrator, who relies on his optical player, you just made up my mind for buying an Oppo to go into my system. No need calibrating if the source is skewing your data.

    One question, and not to get too off topic, would calibrating with and viewing Blu-ray be best recommended at Source Direct, 4:2:2, or 4:4:4. Id assume Source Direct would be most true, but the lack of error in all modes has me wondering.

    Thanks..

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    Recommended Output
    Written by Brad , June 18, 2011

    Which output method would then be recommended for a Sony Sx70 series player,4:2:2,4:4:4,or RGB?

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    Sony S570 mapping?
    Written by Ron Jones , June 19, 2011

    I does look like the S570 is more-or-less mapping the 0-to-255 range into a 0-to-23x range. I might be interesting to see some detail as to what it is doing with the blacker-than-black range (0-to-15). As the yet untested PS3, it offers a mapping function when "RGB Full" is selected as the HDMI output format. In this case Sony says that the full RGB range of 0-to-255 is remapped into the video range of 16-to-235 (while the "RGB Limited" setting is supposed to be accurately outputting in the 16-to-235 range without any remapping). The YCbCr setting on the PS3 is not supposed to be doing any remapping over the 16-to-235 range and with "super white" option turned on, the WTW range of 236-to-255 is supposed to be correctly output. It will be interesting to learn if this is being done correctly..

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    Secrets Benchmark
    Written by Peter , June 25, 2011

    Years ago I purchased a Panasonic S97 based on your excellent review.

    It is still in my HT and seems to do well with calibration pattern DVD's.

    A bit obsolete now that I have an iScan Duo and ChromaPure with autocal and a Chroma C5..

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    Choosing a Color Space
    Written by Stacey Spears , June 29, 2011

    One question, and not to get too off topic, would calibrating with and viewing Blu-ray be best recommended at Source Direct, 4:2:2, or 4:4:4.

    >Which output method would then be recommended for a Sony Sx70 series player,4:2:2,4:4:4,or RGB?

    The color space output you set your player for is based on the signal path. You need to test all options and find out which one works best in your situation. Here is an article that helps you decide which is best: http://www.spearsandmunsil.com...space.html

    I can provide two different examples:

    1. Samsung SP-A800B and Samsung SP-A900B. This display requires 4:4:4 input from an OPPO. If you send in 4:2:2, chroma is shifted half a pixel away from luma.

    2. You want to send 4:2:2 into a DVDO, or Lumagen, processor. Both of these convert the incoming inputs into 4:2:2. If you send in 4:4:4, a low pass filter will be applied to the chroma channel. The Duo and Edge are not that bad, but the VP50 and 50Pro really filter the chroma channels in this scenario..

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    regarding sony player
    Written by Rao , July 01, 2011

    This article is eye opening. Thank you for this article.

    I have questions regarding the testing of sony player. You haven't mentioned which video option you have chosen. Standard , Bright room, theater etc.

    After reading your test I went and did test on my player and found theater setting is out putting the WTW correctly. Any setting other than Theater are suffering the phenomena this article mentioned about.

    I kindly request you to redo the testing with Theater mode setting for sony players and post your findings..

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    regarding PS3 WTW
    Written by Rao , July 05, 2011

    "As the yet untested PS3, it offers a mapping function when "RGB Full" is selected as the HDMI output format. In this case Sony says that the full RGB range of 0-to-255 is remapped into the video range of 16-to-235 (while the "RGB Limited" setting is supposed to be accurately outputting in the 16-to-235 range without any remapping). The YCbCr setting on the PS3 is not supposed to be doing any remapping over the 16-to-235 range and with "super white" option turned on, the WTW range of 236-to-255 is supposed to be correctly output. It will be interesting to learn if this is being done correctly.

    In response to above question :-)

    My observation are as below for PS3.

    RGB(full range) and YCbCr(superwhite) are not extendig WTW all the way to 255 in PS3. It was going to 242 or so.

    If I turn off RGB(full range) and YCbCr(superwhite) WTW is set to 232..

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    10 years and many movies later....
    Written by nbmformula , July 30, 2011

    I will now be searching for the BD equivalent to the 2000/2001 Diamonds-in-the-rough Panasonic DVD-RP56 and 82 that were so sought after following the first DVD Benchmarks.

    Thanks for all of your hard work in the last 10+ years..

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    Picture Quality Mode on Sony
    Written by Andy M , August 04, 2011

    The point that Rao made on July 1st is very important. The Picture quality mode (options button during playback) adjusts the picture for different lighting conditions, which setting was used for this test?.

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    Sony Picture Mode
    Written by ChrisHeinonen , August 04, 2011

    The Sony was reset to factory defaults for the test, so any special picture modes wouldn't have been used, as that's the way it is most likely to be used by consumers. If we have time in the future, I will attempt to test both modes and have results for it. The Sony image adjustments lead to a higher gamma factor, and therefore a darker image, so if they have a Theater mode that's neutral, that would actually produce a brighter image in a darkened theater than the normal mode, which seems to be a strange choice..

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    So, the ideal situation should be...
    Written by Victor , August 12, 2011

    Having the Blu-Ray Player and the projector or TV set to RGB, 4:2:0, 4:2:2, 4:4:4 or RGB?

    Regarding the OPPO players used with a Panasonic Plasma VT20 for instance?

    And connected with a PS3, what do you recommend?

    If my projector also has the same options as the OPPO, the best match would be RGB?.

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    ...
    Written by Rob , November 21, 2011

    I can provide two different examples:
    1. Samsung SP-A800B and Samsung SP-A900B. This display requires 4:4:4 input from an OPPO. If you send in 4:2:2, chroma is shifted half a pixel away from luma.

    2. You want to send 4:2:2 into a DVDO, or Lumagen, processor. Both of these convert the incoming inputs into 4:2:2. If you send in 4:4:4, a low pass filter will be applied to the chroma channel. The Duo and Edge are not that bad, but the VP50 and 50Pro really filter the chroma channels in this scenario."

    If all displays display in RGB, and you know your Oppo or other player outputs a perfect conversion to RGB, then what happens if you just stick to RGB output?.

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    RGB Conversion
    Written by ChrisHeinonen , November 24, 2011

    "If all displays display in RGB, and you know your Oppo or other player outputs a perfect conversion to RGB, then what happens if you just stick to RGB output?"

    While all displays do use RGB at the end of the chain, they all might process the signal differently. Some might take RGB and convert it to 4:2:2 or 4:4:4 first, then apply any color or tint adjustments at that stage, and then reconvert to RGB. That introduces two potential stages for a bad conversion, and feeding it 4:2:2 or 4:4:4 could remove one of those.

    If you have a player that outputs all colorspaces correctly, you can then use test patterns (Spears and Munsil has a few that do this) to determine if your display handles them correctly, and which it handles best. Once you determine what it handles best, then you want to use that if possible from your source components..

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    ...
    Written by Chris Eberle , November 25, 2011

    Very few displays will process an RGB signal without conversion to YPbPr. The way to tell is if your Color and Tint controls are grayed out when you input RGB. Those adjustments are only available for YPbPr signals. If you feed RGB and you can still adjust Color and Tint, then the display is converting twice as Chris H. describes above..

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    This is soooo cool, thanks!
    Written by Head_Unit , January 26, 2012

    So now we now "bits are bits" except when they aren't! I didn't realize about the conversion from the data format on the disc itself. Maybe to fit enough data, the industry could introduce 12" Laserdisc II :-D

    Great work, appreciate it very much..

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    exceptional job
    Written by winston churchill , April 14, 2012

    So refreshing to see a site devoted to facts and getting information out to assist manufacturers and to consumers. Very powerful information. I used to use Avsforum but find it useless these days. Great work. I will look forward to your coming reviews and very well Written and easy to understand articles. This is not the easiest stuff to make understandable and you do an incredibly great job at it.