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Stacey Spears and Don Munsil have written many seminalĪrticles, together and separately, on inside secrets of video decoding, The Spears & Munsil High-Definition Benchmark, Blu-ray Edition
Said, “this is the disc Don and I wished we’d had when we started creating theĭVD Player Benchmark™ and Progressive Scan Shootout.” This disc really fits the Spears & Munsil motto: Hand-Forged Video.”
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We built our own video editor and text overlay generator as Video-to-film pulldown patterns we wanted to generate.
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Spears, "we found that no existing software could create the special
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Spears and Munsil are best known for their analysis and testing ofĭeinterlacing chipsets, so it’s no surprise that the disc includes a full suite This ensures that there is no bleed or artifacting caused by compression.”
“We shifted the borders betweenīars slightly so every one of them is on an AVC or VC-1 macroblock boundary. “We noticed that lots of color bar patterns have small artifactsĪt the borders between the bars,” said Spears. It’s a convergence problem or a decoding problem.”Įven a classic pattern like the ubiquitous Color Bars gets the Spears and Our pattern can show you that kind of alignment issue, and show you whether We’ve seen modern players that misalign the chroma channels up or down. The old days of analog, vertical chroma alignment was never a problem. And it allows you to check both vertical and horizontal alignment. It’s easy to see an offset of as little as a quarter-pixel, which we think is aįirst. Tell if the chroma channel is aligned properly with the luma channel. Proud of our Chroma Alignment pattern,” he added. That most image-processing software uses.” “Chroma patterns are especially tricky, because youĬan’t create them properly with full dynamic range in the RGB space Minimize artifacts and preserve all of the detail and bandwidth,” saidĬo-creator Don Munsil. Software generates the patterns in the native color space of Blu-ray, withoutĪny unnecessary color space conversions or rounding. A whole suite of chroma-channel evaluation patterns make it easy toĮvaluate chroma reproduction separately from luma.
Spears and munsil dvd 1080p#
Shows how much of the 1080p image is being cropped by the player and/orĭisplay. Reproducing the highlights or shadows properly. A clipping pattern makes it easy to see whether the display is The disc includes patterns not seen on other discs, and new twists on oldįavorites. “Everything was created and encoded entirely by us, with no We didn’t make our disc byĮncoding patterns from an off-the-shelf pattern generator,” said co-creator “We developed our own pattern software so we could make patternsįor ourselves for evaluation and calibration.
The High Definition Benchmark uses all-new patterns created from scratch. Test material and calibration patterns to help home theater enthusiastsĮvaluate displays and players and adjust their home theater systems to get With this product, the end results seem incorrect and that's before considering the fiasco of a filter that doesn't work with mainstream displays.Stacey Spears and Don Munsil, acclaimed creators of the DVD Playerīenchmark™ and Progressive Scan Shootout at Secrets of Home Theater and Highįidelity®, announce the release of the Spears & Munsil High Definitionīenchmark, Blu-ray Edition. Most of us though should be able to get an outstanding picture without one.
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If you must go down the calibration route, I recommend getting a professional to do it. Spears & Munsil claim that it is your display that doesn't work with their product but a Panasonic Plasma is a mainstream product it strikes me as odd that it would not work with it. This means that the colour and tint will always be wrong. all black) yet no matter what you do, black bars are always prevalent. What you should see are no bars on the left-hand side of the colour test (i.e. Worst of all, the blue filter specs that come with the disc do not work at all. To begin with, you need to spend a significant amount of time figuring out what exactly to do and the results are strange to say the least (Sharpness = 79?). There were however a few moments on certain blu-ray discs on my settings where the colour looked incorrect (eg murky skin-tones, inappropriate olive tints at times) and I felt a calibration would remedy this. I foolishly bought it to try and "improve" what was already a very fine picture on my Panasonic Plasma that I obtained myself using the Cinema mode as a template.