Interlaced? De-interlaced?

[Donald Harvey]

First off, if there is a sticky for this then I apologize for putting this up here.

I see lots of threads or replies around here talking about interlaced or de-interlaced or progressive or non-progressive, compression, and stuff like that, if anyone has a thread that explains this stuff, or if someone and can help explain this to me that would be fantastic and much appreciated. I understand that this might be a long reply to help me out with my question! So thank you again!

Harvey

 

[x-angel]

This might be a little simplistic, but I will give it a shot.

When you watch videos on A TV, first the lines are done in such a way that the odds ones are done at one time, and then the even ones, so each frame is made of interchanging lines, so therefore, they are interlaced.

If you try to watch interlaced video on a computer monitor (esp a LCD), you will see "waves" in the lines since Computer monitors display the video differently.

De-interlaced is the same as progressive. When you "de-interlace" video in premiere, you are combining the lines so that each frame is shown completely at one time.

When it comes to the newer TV's, this is where the 1080i, 720p or what have you setting comes into play.

Usually it comes down to this: If you want it for web play, deinterlace it. If it is going to be shown on a TV, don't deinterlace it.

Like I said, a little simplistic, but I hope this helps. I know there are more intricate details to it, but this should clarify some of the more confusing details.

 

[Paunch]

I've noticed that some surf dvds I have don't have the flicker while playing on a laptop, where as my surf video will have 'waves' in the lines. I' know that some of these other vids were shot in interlaced format, so why would they de-interlace something that is destined for TVs?

Is there a way to cut down on the 'waves' in the lines on a interlaced video that is playing on a computer monitor?