Originally Posted by 8mile13
There is not one Impulse Mode, there are several versions of it - hdtvtest.uk ''the sony W905's Impulse Mode caused significantly less flicker to our eyes compared to last year's HX853'' ,<- two versions of Impulse Mode.
Interesting to know, I'd love to know if there's a specific Impulse Mode that does not use interpolation.
I don't think there's any, because the KDL-55W905A only adds less than 1 frame of input lag in Impulse Mode, which confirms the abscence of interpolation for the W905A's impulse mode. The increased/reduced flicker can be the changes in the flicker duty cycle (longer strobes versus shorter strobes), so this isn't "different" per se in that it adds interpolation. As long as the word "Impulse" remains interpolation-free
, that's the important thing. A 25%:75% duty cycle flickers more than a 50%:50% duty cycle, even if both does not have interpolation. The duty cycle does affect the amount of motion blur reduction (e.g. www.testufo.com/blackframes#count=3
...) So... Importantly, can you confirm if any "Impulse" mode adds frame interpolation?
There are lots of versions of MotionFlow Clear. It has been said that when using MotionFlow Clear on the XBR8 it would have no impact on calibration, all you have to do is is turn up backlight a bit. That might be true nevertheless it doesn't look nearly as good - in fact it looks ugly when compared - as when you turn MotionFlow Clear off.
According to that diagram, all of those Motionflow Clear modes have interpolation and adds lots of input lag. Look at the middle images of each row. All four of them interpolates! Yuck; that's bad for computers and games -- adds about 40-80ms of input lag -- that's definitely not what W905A does. The Motionflow Impulse mode, that's good for console video games, with low input lag, is the one that does not use interpolation. There appears to be overlap between Motionflow Clear and Motionflow Impulse, but the only one reliable for video game / computer use is the Impulse one.
There are definitely different variants of Motionflow Impulse, but one thing that has not changed: I've never come across an Impulse mode that uses interpolation. Otherwise I'd be dissapointed. The correct Impusle mode adds no extra frames. This means Sony stopped being consistent about keeping interpolation away from the "Impulse" mode, since it's the only motion-blur-reducing Sony Motionflow mode that I can recommend to console gamers and computer users, because it's the low-latency Motionflow mode that works well with 60fps video games, as it leaves all pixels unaltered (no interpolation artifacts)
The only way to have a low-lag Motionflow (good for computers/games) is to keep interpolation away from it. Changes in color quality and flicker quality will probably continue to occur.
As long as Sony consistently keeps interpolation away from one of the motionflow modes (e.g. Impulse) I'm happy.
At least until the day in the future that interpolation adds less than 10ms of input lag, which is currently impossible (at the moment).Edited by Mark Rejhon - 12/5/13 at 4:48pm