Similarly to the LG 42LG7000, which we recently reviewed, the 42LG6100 has quirky performance to match is quirky design. Read on for the full details...
As is visible from the CIE chart, the Saturation and Hue of each of the Primary and Secondary colours was very close to the Rec.709 HDTV standard, which is excellent. I've seen displays which push the red and, most commonly, green colour points out to eye-blazing extremes, so it's nice to see LG take a more accurate approach here.
After calibration, accuracy was stepped up a few notches, resulting in flat RGB tracking, accurate colours, and excellent Gamma to boot:
All of this was made possible by the ISF controls on the LG 42LG6100. The improvements in accuracy are visible with real content (with more realistic flesh tones and less radioactive-looking colours), and can be proven by the charts. There's one thing that the CIE chart doesn't show, though, and that is the Luminance value of each colour (the chart sadly only shows Saturation and Hue). Luminance values were about right, which is fortunate, because as excellent as LG's picture controls are, they don't give us control over this aspect of colour reproduction. Regardless, these are absolutely excellent results, which make the problems we discovered later all the more frustrating...
Unfortunately, like LG’s other recent displays, the stellar Greyscale and Colour performance are overshadowed by some quirky video processing issues, some of which I previously spotted when I was reviewing the LG 42LG7000. During the review, I spotted ringing around high-constrast objects, interlacing artefacts where there should be none (on progressive content), and reduced picture definition due to what looks like a terribly misguided attempt at noise reduction. None of these would really be a problem if they were optional, but they aren’t: we can’t disable them.
Like the 42LG7000, much of this unwanted processing can be shut off if you can convince the TV that the incoming video is coming from a computer and not a video device (the probable reason for this being that these picture processing algorithms, while ugly enough on video content, could chomp through the fine lines and icons on a computer display and actually make it unusable). To do this, you have to label the input as “PC” in the TV’s menus. That often isn’t enough though, because the 42LG6100 will only believe you and shut off the processing, if the input signal has a computer-style 60hz refresh rate. In other words, this trick won’t work with your 50hz-based upscaled PAL DVDs or your 24p Blu-ray Discs.
Regardless, I ploughed through the Deinterlacing tests by sending the TV both 480i and 576i signals over HDMI. As with the rest of LG’s current displays, the diagonal interpolation (smoothing of interlacing jaggies) was excellent, but the second test showed that when the “Real Cinema” option was enabled, the display would often have a hard time discerning between Film and Video content. Turning this function Off forces the display into Video mode (which is not optimal). In other words, you’ll have to manually switch between these two options yourself for the best results with interlaced content.
The Film Cadence tests were incredibly heartening. Many of the more unusual NTSC tests passed, as did the most important 3:2 test. For PAL content, the 2:2 Telecine A test passed (the second failed, as usual, but this is all but irrelevant). These are excellent results, as some HDTVs from big name brands lack any sort of film mode detection.
While watching some Freeview TV channels on the 42LG6100, it became apparent that the TV was applying a heavy dose of MPEG Noise Reduction techniques to the often hideous broadcasts. As a result, the display does remove mosquito noise from the video, but unfortunately goes too far and begins removing traces of genuine detail, too. What’s more, there is no option to turn this off, so TV shows can sometimes look sub-par.
Better quality SD sources, such as DVD-Video titles, naturally fared better, but these too could look quite unnatural thanks to the detail reducing video processing algorithms in use by the TV.
Basic Calibration Performance – HD
The aforementioned video processing quirks with this display meant that high quality Blu-ray Disc titles were wasted on it. Outputting the Spider-man 3 Blu-ray Disc in 1080p/24 allowed me to spot interlacing issues (yes, on a 1080p feed), suggesting that the TV’s video processing is 1080i-centric. On top of this, the finest details from the film were eaten through and eroded.
It’s possible to remove these issues by forcing the Blu-ray Disc player to output 60hz and labelling the video input as “PC”. This leaves the image comparatively untouched, and gives some insight into the sort of quality we could have expected from this screen from all sources, had excessive video processing not interfered. Of course, this won’t do anything to help Sky HD or Freesat HD programming, which is 50hz and as such doesn’t escape the processing.
Picture Quality: Calibrated
Although the already great Greyscale and Colour were only improved with calibration, there was little I could do to remove the most severe performance issues with this display.
Although the results were fantastic from the perspective of Greyscale and Colour accuracy, the flawed, undefeatable image processing could seriously taint the end result. As such, the LG 42LG6100 certainly provided a unique viewing experience, but ultimately I was just left thinking how great it could have looked.
- Out of the box accuracy is well above average
- Picture controls provided allow for fine-tuning of already excellent results: calibrated greyscale and colour accuracy are excellent
- Attractive and well-designed menus equal great ease of use
- Diagonal interpolation (jaggies smoothing) works brilliantly
- Film Mode detection above average
- Weak contrast ratio robs picture of depth
- All processing appears to be done in 1080i, creating interlacing artefacts
- "Behind your back" video processing removes definition from High Definition video and creates unnatural look - especially painful given the excellent Greyscale and Colour performance
LG LG6100 (42LG6100) LCD TV Review
It’s for this reason that the 42LG6100 is so frustrating: its weak contrast ratio is an inherent limitation of the LCD panel itself, but more frustrating is the designed-in video processing which really sours what could have been a very respectable package. Although the company's efforts in some areas are incredibly commendable, it looks like LG have a little more to learn regarding what makes a great picture. Additionally, while I don’t normally comment on a television’s built-in speakers, as they’re usually serviceable at best and very rarely great, it must be said that the speakers fitted to this TV are unusually feeble.
Here’s hoping that LG will produce more restrained LCD TVs in the future, which share their current range's high points. For now, there are better displays to be had for the cash.
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