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<blockquote data-quote="KRA" data-source="post: 309272" data-attributes="member: 13608">1080p doesn't ned deinterlace, hence the P - Progressive. No need to deinterlace something that isn't interlaced.Line doubling takes the lines of each interlaced field (consisting of only even or odd lines) and doubles them, filling the entire frame. This results in the video having a frame rate identical to the field rate, but each frame having half the vertical resolution, or resolution equal to that of each field that the frame was made from. Line doubling prevents combing artifacts but causes a noticeable reduction in picture quality since each frame displayed is doubled and really only at the original half field resolution. This is noticeable mostly on stationary objects since they bob up and down. This technique is also called bob deinterlacing for this reason. Line doubling retains horizontal and temporal resolution at the expense of vertical resolution and bobbing artifacts on stationary and slower moving objects. A variant of this method discards one field out of each frame, halving temporal resolution.[code]Line&nbsp; &nbsp; &nbsp; &nbsp; Progressive signal (25fps):&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; Interlace signal (50fps):&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 1 frame&nbsp; &nbsp; 2 frame&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; 1 frame&nbsp; &nbsp; 2 frame1&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ----------&nbsp;&nbsp; ------------&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; -----------2&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ----------&nbsp;&nbsp; ------------&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; -------------3&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ----------&nbsp;&nbsp; ------------&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; -----------4&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ----------&nbsp;&nbsp; ------------&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; -------------[/code]I believe BOB rather than combine frame 1 and 2 to make 25fps progressive signal, either a) on frame one copy line 1 to line 2, and line 3 to line 4, and on frame 2 copy line 2 to line 1 and line 4 to line 3. This would result in 50 fps. The other option is to ditch frame 2,4,6 etc.. this results in 25fps and half resolution. once again, I'm not 100% about everything here.</blockquote>

[QUOTE="KRA, post: 309272, member: 13608"] 1080p doesn't ned deinterlace, hence the P - Progressive. No need to deinterlace something that isn't interlaced. Line doubling takes the lines of each interlaced field (consisting of only even or odd lines) and doubles them, filling the entire frame. This results in the video having a frame rate identical to the field rate, but each frame having half the vertical resolution, or resolution equal to that of each field that the frame was made from. Line doubling prevents combing artifacts but causes a noticeable reduction in picture quality since each frame displayed is doubled and really only at the original half field resolution. [b]This is noticeable mostly on stationary objects since they bob up and down. This technique is also called bob deinterlacing for this reason.[/b] Line doubling retains horizontal and temporal resolution at the expense of vertical resolution and bobbing artifacts on stationary and slower moving objects. [b]A variant of this method discards one field out of each frame, halving temporal resolution.[b] [code] Line Progressive signal (25fps): Interlace signal (50fps): 1 frame 2 frame 1 frame 2 frame 1 ---------- ------------ ----------- 2 ---------- ------------ ------------- 3 ---------- ------------ ----------- 4 ---------- ------------ ------------- [/code] I believe BOB rather than combine frame 1 and 2 to make 25fps progressive signal, either a) on frame one copy line 1 to line 2, and line 3 to line 4, and on frame 2 copy line 2 to line 1 and line 4 to line 3. This would result in 50 fps. The other option is to ditch frame 2,4,6 etc.. this results in 25fps and half resolution. once again, I'm not 100% about everything here.[/b][/b] [/QUOTE]

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