What is the difference between interlaced and progressive scan video

But is there always only one field on the screen at any give point in time. When the second field is displayed on the screen does the first field disappear? If so, is this how video is video recorded on camcorders that are interlaced. Does it capture images one field at a time or does it capture a whole frame and then interlace it?

And I read somewhere that deinterlacing video actually reduced the quality of the video a little. Does outputing it as progressive scan somehow deinterlace the footage wrong. I have Adobe Premier Pro 1. An image is drawn on any screen TV or monitor by a single dot of light, OK, color uses 3. That dot moves across the screen turning on and off until it reaches the other side of the screen. It then turns off, moves back to the first side, moves down and starts again.

The on and off durning the scan creates the image seen. Pretty straight forward. The screen is chopped into lines from top to bottom.

Try to image all those lines numbered from top to bottom. Interlaced video will draw all the odd numbered lines first, then go back and draw the even. Progressive will draw them in order. Most televisions use interlaced. It tends to provide smoother looking motion but shakes when paused. Thats because only half of the picture is drawn per field. When the next field is drawn in to complete the image, whatever moving object is in the image will be drawn slightly out of alignment.

When these 2 fields are displayed back and forth as in paused video, the shift creates the blinking. Progressive draws the image entirely before starting the next frame. Typically, deinterlacing will literally delete 1 field and fill in the missing space with an identical duplicate of the remaining field.

Yes, some detail is lost therefore reducing the quality of the video. Converting interlaced to progressive will keep all the fields, it will just draw both at the same time. So instead of it drawing , it will mix them into Same is true with deinterlacing. It draws the entire image in 1 shot 1 frame. Deinterlaced draws and so on. Are you saying that I should use say lagarith to achieve this? II By 'edit' - I mean taking bits from each avi file and creating a kind of greatest hits.

I'm afraid you're confusing us,. What is your source? Is it encoded and authored DVD? DV-AVI is a lossy compressed final delivery codec. You can use simple cut-and-join without harming it, but it has to be re-encoded to a format that's playable outside of a PC if that's what you want. But re-encoding it as DV just sets you back by another stage of lossy encoding, because you'll have to re-encode it to your final non-AVI output anyway. Those files are part of DVD structure. PGCdemux for example.

So you get mpeg2 files from your DVD and store them for later use, editing, viewing. Those mpeg2 files should stay interlaced, as original DVavi's were. As long as that DVD recorder did not mess something up. You shouldn't use TVMW5 for this -- it's an encoder, not a smart-rendering editor. What you do with the copied DVD content is up to you, but you haven't told us what you want for final output nor what you mean by "edit". Editing can be simple "cut-and-join" or can also mean more complicated re-processing.

Below, we will explore the key differences when comparing p vs. In an interlaced scan, odd and even rows of pixels on your screen illuminate in an alternating fashion. Since the fields flash so quickly 30 times per second! The number refers to the amount of vertical pixels. Each field in an interlaced scan consists of pixels, and adding up each field gives you get a total of vertical pixels.

Next, progressive scan takes a different approach to the same pixels, scanning every row progressively. Your screen refreshes every row a whopping 60 times per second. As you might imagine, this is harder to pull off technologically, but the results are worth it.

Interlaced and Progressive are two different video scanning methods. Scanning video is the procedure of electronically painting pixels onto a video display. Each second, hundreds of lines representing rows of pixels are scanned horizontally, from left-to-right and top-to-bottom.

Interlaced scanning displays half of one frame per scan cycle. It is achieved by splitting up each video frame into two equal sections, known as fields. Each field makes up half of one frame, assembled of alternate lines.