scan line

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scan line

[′skan ‚līn]
(electronics)
A horizontal row of pixels on a video screen that are examined or refreshed in succession in one sweep across the screen during the scanning process.

scan line

The line produced on a recording medium frame by a single sweep of a scanner.

scan line

(hardware)
A horizontal line of pixels generated by a single horizontal sweep of the beam from a monitor's electron gun. The number of scanlines that make up a frame is the vertical resolution.

scan line

A horizontal line (a row) in a video frame. Camcorders sense image frames a line at a time, and display systems create images a line at a time. The scan lines are the vertical resolution of the system; for example, an NTSC TV signal uses 525 lines, 480 of which contain image data ("active" scan lines) and 45 are the vertical blanking interval (VBI) in between the frames. Following are the active scan lines of various video formats. See scan rate and horizontal scan frequency.

Analog              ActiveFormats             Scan Lines

  VHS                 240
  8mm                 240
  Sony U-matic 3/4"   250
  Sony U-matic SP     330
  S-VHS               400
  Hi8                 400
  Laserdisc           425
  NTSC                480 out of 525
  PAL/SECAM           580 out of 625


  Digital             ActiveFormats             Scan Lines

  DVD                 480
  DV                  480
  SDTV Digital TV     480
  EDTV Digital TV     480
  HDTV Digital TV     720 & 1080
References in periodicals archive ?
There are many possible uses for these spare channels, such as providing synchronizing signals to allow viewing the mirror scan lines on an oscilloscope, or re-creating any of the 6 signals digitized by the ADC for troubleshooting purposes.
The goal is to approximate a concave wavefront focused on a point at the desired depth and position along a radial scan line (Figure 1).
The sector size affects the number of scan lines needed per image.
5) 1080i:A digital broadcasting video signal format that uses 1,080 effective scan lines (1,125 actual lines) and interlaced scanning at 29.
A vertical scan line is used in order to pass through the document starting from the right-most column.
The net result is a 10X magnification of the vertical scan angle, converting the diffraction fringes' linear motion into rotational motion, yet stabilising the fringes as a stationary pattern, to create a horizontal scan line with the requisite 3D information, albeit only with horizontal parallax.
SDTV Considerably less expensive than The 480 scan lines are visible on higher model TVs.
The RealScan 76 leverages a dual-channel video system and a 10,000-RPM motor to deliver an 18,677 read scan lines per second, according to the Duluth, Ga.
An LCD TV gives a smooth, colourful picture without the annoying scan lines of a conventional TV.
Readers of English begin at the top left of a page and scan lines, sweeping horizontally from left to right, down to the right corner of the page.
Both images were radiometrically corrected and pre-processed to remove speckles, clouds and scan lines.
Resolution is the distance from one point to another between scan lines; density is the distance from one point to another within a scan line.