This time I got an *interlaced scan* at 50 Hz! Now, usually when I run into one of these interlaced TS files I simply load it up into Avidemux and clip out the bit I want and save. The video data was encoded in AVC format, the audio Dolby 5.1 and the overall video stream characteristic was (or is) 1920x1080i. I downloaded a VIDEO-TS file from the internet containing a music concert by a band (the current year is 2014) called "Warpaint". This post will date me, but just now I went to test a theory. If this post is successful I may continue explaining some of the popular ways to work with this phony problem. Why not cache up a few scan lines and run it interlaced? Because in the end, your deinterlacing will be returned back to interlaced data for visual display. What baffles me though, is why the requirement that progressive frames be used for internet streaming. Therefore it follows that it is actually *impossible* to "perfectly" deinterlace any interlaced image stream because the data is not mapped from a rectangular grid. NOT by aligning the scan lines because that data does not form the rows and columns of any image (or frame).Ī complete frame consists of the entire layout of cells. That image is obtained by building a honey comb. The part you call "image" is what is supposed to go into the cells, not what is meant to make up the resulting image. So the scan lines have to be misaligned because their target is not a rectangular grid, it's a honeycomb. To transmit your image to another screen is simply a matter of sending signals along a wire containing the data to be placed at the position indicated in the data right? No need to compensate for the square root of two or anything. Now if you want to draw an image on that beautiful surface just created all you have to do is get the right color values into the right cells. Making a TV work *like that* would be madness. And therefore you can make a TV screen work without having to deal with Pythagoras whose rectangle has the annoying property of setting diagonals 1.4 times as far away as horizontals. Question is, will it fit? Because if it fits then the centers of those hexagons will be the same distance from the centers of all of their neighbors. Okay, imagine in your mind this row and below it you want to fill in another one. After doing that you can line them up into a row all flush. Take a hexagon like that and tilt it by 30 degrees so as to make what you see now as bottom and top, become instead the left and the right "vertical" sides of the hexagon. Once again, the font kills me in an attempt at a demo, but I'll try: The principle utility of the honeycomb layout is that each "cell" is equidistant from all of its nearest neighbors. Instead they form the same kind of structure found in a bee hive. The layout can have only one possible formation:īecause the font is not fixed width it is not easy to tell that the even and odd rows above are not aligned vertically. First realize that a television screen, old or new, is composed of light-emitting "cells" in horizontal rows one after the other from top to bottom. I don't think I can draw it or, maybe I can. It would not be possible to transmit TV data in any other format because of the way the screen is laid out. Because of the geometry of the surface on a TV screen Because it's faster and you get better compressionĬ. Why is broadcast audio/visual content always transmitted in interlaced format?Ī. But could you tell me, now that only swap fields is enough to make the result perfect, does this mean the source material is not interlaced at all? Or how is that possible?Īsk yourself a question and try to answer it without looking anything up.
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