วันพุธที่ 27 พฤษภาคม พ.ศ. 2552

Mitsubishi LT-46148 LCD HDTV - Review (2/3)


By Richard Fisher

Out of Box Performance

In a matter of minutes the TV went from out of the box to displaying images from a TiVo Series 3 using HDMI via the auto input sensing feature. It does take a minute or two for the display to recognize the connection and perform this function for you. After setting up the input it will ask about setting up the remote for NetCommand which I skipped. As with all display products you get sales mode from the manufacturer which is their calibration to induce your purchase having nothing to do with performance imaging and video standards. My son joined me on this first look and both of us quickly grew weary of the artificial artifact ridden response. Having experience with Mitsubishi products I set the picture mode to Natural, color temp to Low and Video Noise to off creating a perceptually pleasing response similar to what we would expect with video standards. As we went channel surfing, first impression was intermittent jumping or skipped frames. We finally settled in on a 20 year old movie on HDNet. This led to a discussion of how this movie did not look its age as if it had just been shot with an HD video camera. My son followed up with comments of how so far it looked like computer generated images along with an artificial motion response. I went into the menu and turned off the Smooth 120 Hz LCD processing making the movie finally look like film, removing the CG motion artifact as well. We played with this feature some more and spent about 10 minutes on one particular scene using the TiVo DVR function. The Smooth 120 Hz LCD processing has three settings, off, medium and high. High provided the most artificial response and quirky motion totally un-natural. Medium was little improvement. While this feature did remove motion blur for the most part it would intermittently lose cadence lock jumping a frame or blurring for a moment. We both agreed the best setting was with this feature turned off. Some more surfing and testing of the Smooth 120 Hz feature brought us to another HDNet Movie from 1996. Ultimately we found the imaging seductive along with the movie being entertaining and involving so we turned off the feature and ended up watching the movie all the way through.

Gallery Player

If you were interested in this feature GalleryPlayer has closed it's doors. Per GalleryPlayers website they ceased operations July 30th 2008. CrunchGear reported that founder Scott Lipsky had sold the company August 2008. On August 27th, 2008, Mitsubishi issued a press release stating, "Mitsubishi Digital Electronics America, Inc. has been informed by GalleryPlayer, Inc. that GalleryPlayer will no longer provide the service that enables owners of certain models of televisions to download and display art and photographic imagery on their flat panel HDTVs. Accordingly, while owners can continue to view their own photographs on their televisions, that portion of the GalleryPlayer feature which was designed to allow access to the GalleryPlayer on-line library of images will not function as advertised". The loss of the GalleryPlayer feature affected models from Panasonic and Samsung as well.





You can still put pictures on a USB flash drive but unfortunately PC images are encoded for PC video 0-255 and this input is setup for consumer video, 16-235. That means upper whites, 235-255, and lower blacks, 0-15, are clipped delivering images with artifacts appearing overdriven with highlights washed out, blacks cut off, devoid of color or wrong color. For those who know what good video should look like it will be obvious yet those who do not know any better may be potentially satisfied.

Using a PC


The display does not offer a VGA PC input requiring you have a DVI or HDMI digital video output instead from your PC. According to the manual you must name the HDMI input you are using for your computer, PC, "It is important to use the name PC so that the TV can process the video signal correctly". This setting is critical if you want the most out of your PC because it allows 4:4:4 color processing. This also changes your aspect ratio options adding a 1:1 pixel mapped centered output with some scan rates.

If you select PC for the input name the display expects PC progressive scan rates at a 60 Hz frame rate. It won't display 1080i as an example if you are using your PC for DTV outputting native 1080i. If you expect to run a PC Blu-ray player in the future it won't accept 1080p24 frame properly either telling you this scan rate doesn't work. Although it will show an image, after downsizing it with black borders all around, your 1:1 pixel map is destroyed.

Noise

One of the quietest displays I have had in my presence. This is to be expected of LCD in general.

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