Process of creating a television picture by sequentially drawing odd and even lines on a screen. The process is used by NTSC and several digital television signals.
Historically, TV CRTs are interlaced, while computer CRTs are not. Interlaced means that the electron beam skips every other horizontal line, filling in the missing lines on the next pass. A frame is composed of 2 fields. One field is all of the odd numbered lines, and the other field is all of the even numbered lines.
In a television display, interlaced scan refers to the process of re-assembling a picture from a series of video signals. The "standard" NTSC system uses 525 scanning lines to create a picture (frame). The frame/picture is made up of two fields: The first field has 262.5 odd lines (1,3,5...) and the second field has 262.5 even lines (2,4,6...). The odd lines are scanned (drawn on the screen) in 1/60th of a second, and the even lines follow in the next 1/60th of a second. This presents an entire frame/picture of 525 lines in 1/30th of a second. Analog NTSC video uses interlaced scanning, as do several digital television formats. Formats that include an "i" (1080i, 480i) use interlaced scanning. See also progressive scan.
Describes the way that two fields of video information are combined to create a full frame picture. One field containing odd lines and one field containing even lines. Each field is drawn on the TV picture tube in 1/50th second. (1/60th second for NTSC)
A method of drawing a picture frame on a television screen using two fields. One field is comprised of all of the odd-numbered lines on the screen, and the other field is comprised of all of the even-numbered lines on the screen. An interlaced picture is created by drawing all of the lines in one field first, then drawing all the lines in the other field second.
Interlaced Scan displays picture lines by drawing the odd lines first (1,3,5,7, etc.) followed by the even lines (2,4,6,8, etc.). There is flicker inherent in this scanning method, but it is easier to draw more total lines per frame (as compared to progressive scan).
the means by which traditional television picture tubes create images onscreen. An interlaced-scanning tube sends information to each pixel in the even-numbered rows of pixels on a screen, left to right and then top to bottom. Then it sends information to odd-numbered rows. This results in a slightly distorted picture, as the component parts of the image do not all appear on the television screen at exactly the same time. The 1080i (interlaced) high-definition standard is an interlaced-scanning standard. (See also progressive scan.)
A technique that presents half of the lines of picture detail in one field, then presents the other half in the next field. Two complete fields make up one frame of video. This technique is used to preserve channel size, but can create motion artifacts.
A video scanning system in which alternating lines are transmitted, so that half a picture is displayed each time the scanning beam moves down the screen. An interlaced frame is made of two fields.
The process of imaging a television picture by having the numerous scan lines that form the picture laid down at two intervals, with each positioned adjacent to the other. Done correctly, it allows for a sharper picture at any given transmission bandwidth. See also Progressive scan.
Each frame of video is beamed to the TV screen in two passes lasting 1/60th of a second each. Odd numbered lines are displayed first, top to bottom in 1/60 of a second. Next, even numbered lines are displayed, from bottom to top. All together it takes 1/30 second to display an entire frame.
The process whereby each frame of a picture is created by first scanning half of the lines and then scanning the second set of lines, which are interleaved between the first to complete the picture. Each half is referred to as a field. Two fields make a frame.
The means by which traditional television picture tubes create images onscreen. An interlaced-scanning tube sends information to each pixel in the even-numbered rows of pixels on a screen, left to right, then top to bottom. Then it sends information to odd-numbered rows. The even and odd lines of each frame are referred to as fields. The 1080i (interlaced) high-definition standard, to be used for most high-definition broadcasts including those by NBC and CBS, is an interlaced-scanning standard. See also progressive scan.
