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- Interlaced versus non-interlaced. Which is better...
Simply put, non-interlaced monitors (or rather, non-interlaced video modes) are considered superior because they tend to produce less flicker.
- Why do interlaced monitors tend to produce more flicker...
The reason is non-interlaced monitors/video modes use only one pass or "sweep" of the electron gun, whereas interlaced monitors/modes use two passes or "sweeps" to display the same image. With interlaced monitors/modes, one set of lines is made on the first sweep then, a split second later, a second sweep creates more lines to fill in areas left open after the first sweep. More accurate results can be had when one sweep, rather than two sweeps, produces the image. Non-interlaced monitors are capable of interlacing, but the display results are better with non-interlacing; thus, there is no sense or desirability to use interlaced modes on non-interlaced monitors.
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The Difference To understand this concept you have to understand the different types of tv. First you have CRT (cathode ray tube) This type of tv is… usually interlaced and is the style that most people have. It has been around since the beginning of TV. The next style is the LCD/Projection/Plasma. These TVs are all progressive or non-interlaced. Cathode Ray Tubes display a picture by shooting a cathode ray at electrons giving you a picture. The cathode ray scan down the screen in lines. If it scans interlaced it will scan lines 1,3,5,7 etc. and then it will go back and scan lines 2,4,6,8 etc. Because of our mental ability to "fill in the gaps" we percieve it as an uninterupted picture. Non-interlace pictures scan all lines from top to bottom. Progressive scan gives you a higher quality image but it is harder to maintain brightness a constant picture because it takes longer to get through all of the lines than just half of them. This scanning rate is also called the refresh rate. Plasma screens and LCD essentially refresh all of their pixels at the same time so they are neither progressive nor interlaced.
Progressive means a full frame scan, so something that is 25p means there are 25 full frame scans per second. Interlaced however breaks the frame into thin lines (or fields). …It then alternates between scanning odd and even lines. So something that is 50i means that 25 times a second it scans the even lines and 25 times a second it scans odd lines.
A non interlaced monitor is one where all the scan lines occur sequentially, whereas an interlaced monitor is one where all the odd scan lines occur, followed by all of the ev…en scan lines, in alternating painting of the phospher.
Non-interlaced, more commonly known as progressive or progressive scan, is better. This is because every line is drawn on the screen in a progressive manner which result…s in clearer, crisper, and sharper pictures than interlaced ones.
That's all down to how you shoot. Non-interlaced footage is referred to as 'progressive', ie you're seeing complete frames of information displayed consecutively, one af…ter the other, 25/30 times per second. With interlaced, each frame is broken down into two fields, which are mixed together (interlock your fingers -the fields are arranged like this), and instead of the whole frame changing 25/30 times per second, the fields will take turns to switch, and each field will change once per second. So, effectively, there are 50/60 image changes per second, as it takes 1/25th or 1/30th of a second for both fields to swap out with new images. High end cameras these days can generally shoot either of these frame rates. If you wanted an end product that looked progressive, shoot progressive. It's not ideal to shoot interlaced if you're planning on converting to Progressive (known as de-interlacing), as technically, in order to do this, you'll have to remove one of the fields per frame (I'm not quite sure how the conversion works), meaning that essentially you're losing half of the information. This lowers quality etc. That's what they say, anyway. If you ask me, interlaced is not suitable for drama. Even documentary looks cheap when shot interlaced. But that's just me. If your camera shoots progressive, and that's either 24p, 25p, 30p, 720p or 1080p, your image will contain as much information as an interlaced one. Then it's all up to your camera, and its lens...
Type your answer here... disadvantages of interlaced monitor. +
non-interlacedRefers to monitors and video standards that do not use interlacing techniques to improve resolution. Although interlacing increases resolution, it also increases… screen flicker and reduces reaction time
Interlac was a code language devised by the fictional (United Planets) and used by the Legion of Super-Heroes in Adventure Comics. It may have required special computers… to maintain confidentiality. a task for Brainiac 5!
interlaced and non interlaced monitors advantages of each and disadvantages LCD AND CRT MONITORS ADVANTAGE AND DISADVANTAGES
Interlaced and non-interlaced are terms describing how a single frame (or picture) of television is put on the screen. In both cases the frame is composed of a number of… horizontal lines which together make up a page. The "obvious " way to do this is to paint the lines in order : 1, 2, 3, 4, . . . .623, 624, 625. Unfortunately this leads to a visible flicker effect on the screen. A way to reduce the flicker effect is to paint the screen in two parts : 1, 3, 5, . . . 621, 623, 625, 2, 4, 6, . . . 620, 622, 624. The result of this is to interlace two halves of the image. It's not really a brand new technical term - people have been interlacing the fingers of their hands and using the word to describe it for hundreds of years. Some TV systems, especially low cost security systems, use the "obvious" method. This is called non-interlaced.
A method of refreshing the image on a monitor. Instead of refreshing the entire image (non-interlaced), an interlaced monitor refreshes the odd-numbered scan lines first…, then refreshes the even-numbered scan lines on the second pass. This reduces the amount of new information that has to be passed on each sweep, but causes almost unnoticeable flicker, that can result in eye fatigue.
Interlaced images are created by drawing alternate lines of an image from the top of the image to the bottom. The lines are all odd numbered. When they are complete, the even …numbered lines are drawn in the gaps left by the first pass. In two passes, a complete image is generated. All standard definition video and some HD video is delivered in this way with the formats of 480i, 576i and 1080i being the most commonly known. Progressive scanning generates the image in a similar way but draws consecutive lines to build a complete picture in a single pass. Video formats that work this way are 720p and 1080p The interlaced scanning was introduced many years back when limitations on data transmission rates meant that interlacing offered a smoother looking image than progressive scans.
Television images are created from many lines that build into a complete picture. HD signals use 720 or 1080 lines for example. The image is refreshed at intervals to create m…oving images. Interlaced signals use two passes of the image to build a frame. The first pass updates all the odd numbered lines, 1, 3, 5 through 1077, 1079. The second pass updates the even numbered lines to complete the full picture. The process repeats 25 or 30 times each second. Progressive signals update the frame in a single pass, refreshing every line 1, 2, 3, 4, to 1079,1080. The letter "i" or "p" after the line number indicates whether the signal is interlaced or progressive.
Interlaced YUV will only display lines 1 3 5 etc. then go to lines 2 4 6... in the next screen refresh cycle of 50 or 60 times per second depending where you live in the world…. Progressive will display all the lines at once in every cycle, so effectively twice as much info onscreen in any one cycle. For your purposes YPbPr is the same as YUV. Technically YUV is a type of colour gamut, or colour space standard to ensure colours match from one device to the next. YPbPr is an analog connection using this colour space standard and uses three cables (red, blue & green) just for the picture. YCbCr is a digital version of this. Both are commonly called Component. For the average home TV viewer these terms are all interchangeable - YUV, YPbPr and YCbCr. Even the sales assistant is unlikely to have a clue there is a difference. It is chips with faster clock cycles and processing power that have helped us attain this point. The newer players and TVs allow even more lines on-screen than the original Standard Definition (SD) TV lines of 576 (PAL) or 480 (NTSC). A DVD is however only SDTV resolution. To get more definition onscreen you need to be receiving an HDTV (1280x720) signal normally arriving via satellite dish (DVB-S), a FullHDTV (1920x1080) signal from a ground transmitter (DVB-T), or a Blu-ray Disc player (1080). Cable TV (DVB-C) can be in almost any resolution as it is encoded to suit the bandwidth available and often the resolution is traded off for the number of channels the station want to make available. Regards, Jeremy.