Sony Bravia KDL-46HX729 LED LCD 3D HDTV Review
The Sony Bravia KDL-46HX729 is not recommended for avid 3D fans.
Sony makes an awfully big claim here by stating the the Sony Bravia KDL-46HX729 by bandying about the number "480." Of course, you need to read between the lines to discover that they're not claiming a 480Hz refresh rate. Rather, the KDL-46HX729 states a feature ambiguously named "MotionFlow XR 480." The true refresh rate is actually 240Hz, which means the entire screen is refreshing 240 times per second. That should be impressive enough on its own, but the new MotionFlow XR 480 means that the TV is doing additional interpolation between frames in order to make the picture look smoother. We just want to make this clear.
To its credit, the MotionFlow feature does a great job of smoothing out the judder and fine detail loss you would otherwise experience if the feature was off. For sports footage, this can be great. However, film-based content (or video shot to look like film) is meant to have a certain blurriness. If you enable MotionFlow here, the picture becomes overly crisp and, welll... wrong looking for lack of a better term. Use it, but use it wisely. More on how we test motion performance.
3:2 Pulldown & 24fps
The Sony Bravia KDL-46HX729 did show some problems with native 24fps content, like to what you'd get from a Blu-Ray movie. We noticed that certain high contrast, high frequency patterns created Moire and flickering. In most of the other Sonys we've reviewed recently, we simply located the Film Mode setting and played around with the options. No such luck here, as the TV continued to flicker no matter what features we enabled. It's not a huge problem, but we're surprised that the KDL-46HX729 had any trouble at all. More on how we test 3:2 pulldown and 24fps.
The Sony Bravia KDL-46HX729 has a native 1080p (1920 x 1080) resolution, but most of the content you'll be feeding the TV will probably be of a lower resolution. It's up to the TV's internal processing to figure out how to take that content and fit it to the screen. Overall, the TV is good at this task. More on how we test resolution scaling.
When we looked at 480p content displayed on the Sony Bravia KDL-46HX729, the screen loses 2% on all sides due to overscan, an unfortunate but frequent occurrence.
With 720p content, the TV showed no overscan loss, but did produce Moires in high contrast, high frequency patterns.
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