Black frame insertion / scanning backlight question?

[Inu]

This is in regards to technologies on TV's.

I been googling for a while and can't seem to pin an answer to this.
Is black frame insertion the same as, frame interpolation?

I've found sites that state, "it is often used in conjunction with frame interpolation".

So that leads me to believe its a seperate effect?
Assuming thats true, black frame insertion is supposed to nullify sampe-and-hold effect. However does it introduce input lag to do so?
Is black frame insertion what causes that "too smooth" effect, or is that just the interpolation part?

Sample hold nullifcation sounds awful good to me especially for normal gaming LCD's. However i don't know if it causes input lag?

 

[Whoisthisreally]

MCFI is quite different to BFI. You can edit a video to insert an MCFI effect using software. BFI is really a backlight technology.

 

[Inu]

Edited the post to make it more clear that my questions are in regards to TV technologies not video editing.

 

[kasakka]

The interpolation is what causes the "too smooth" effect and is done by adding in-between frames. It doesn't work well with movies because it makes them look like they're shot on video cameras, ruining the "movie feel". Black frame insertion is essentially strobing the backlight to reduce blur caused by the sample-and-hold nature of LCDs. Since both require additional processing from the TV, they add input lag which makes them bad for games. The best application of these technologies is probably something like sports broadcasts that are shot at 30 fps to begin with and benefit from smoother, less blurry motion.

 

[Inu]

I still have yet to see "documented" proof, that a scanning backlight actually introduces input lag.

From what i understand it doesn't. But its very unclear. I've seen one remark that shows it does NOT but can cause flickering.

It looks like all the "backlight scanning" happens in real time, i dont see why not? Its just shooting a black frame onto the screen, its not complex. No matter what is happening on the screen its gonna shoot the same black pattern regardless, so no post processing is involved?

Still looking for a clear answer on this.