Forum Topic: LG OLED TV TruMotion – use it or not?

Not all MCFI Sytems are equal

by hodg100 Jun 13, 2017 at 10:12 AM


  • AVForums member, Graham (nice and simple username there), is the owner of an LG 55C6 OLED TV and, while in most ways he enjoys it, he does feel it lacking when it come motion interpolation picture processing, aka TruMotion.
    We’re not generally big proponents of MCFI (Motion-Compensated Frame Interpolation) systems – and especially with movie/film content encoded at 24/23.976 frames per second as it can ruin the cinematic look but we appreciate that some don’t like the inherent judder associated with it – especially with panning scenes.

    Graham is one that falls in to the category of ‘judder-shunners’ and while he respects those that don’t like interpolation, at all, this debate isn’t really for them but he does consider that if you are a fan, it’s an important feature to consider, especially when spending large sums of money on the latest tech.

    The problem for Graham is in the quality of LG's TruMotion implementation, which in his opinion is markedly inferior to that of its rivals such as Sony and Samsung. Graham has a 55C6 and while in many ways it's a great TV, he has always liked the edge to be taken off 24p jitter, and, in Graham’s estimation, the Trumotion method is very poor at doing this without introducing artefacts. As far as he can see, problems arise regardless of frame rate of the signal (although he may be wrong on this).

    Artefacts, says Graham, are present whether the dejudder is set to 1/10 or 5/10 or 10/10, seemingly to the same degree, even though the motion of the image becomes very unrealistic once you get past, say, 4/10.

    There have been some rumours that the latest firmware from Korea has sorted this to an extent, but it's by no means confirmed.

    For Graham, TruMotion can work fine with unchallenging material, but if you try anything with lots of flashing and/or lots of smoke in it (e.g. a sci-fi film), it causes the trumotion to trip up and results in extremely off-putting side effects (flickering, obvious jagged lines on screen etc), that are not apparent / nowhere near as apparent on other manufacturers' sets when they have their respective systems engaged

    Worse still, especially for the kids, animated material, especially 50hz UK TV content can look horrendous with it on – Graham challenges you to just watch one of the animated shows on CBeebies for example, with dejudder on even 1/10, and look at the multitude of artefacts appearing in and around characters' mouths.

    So, over to you folks, how have you found LG’s implementation of motion interpolation?

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