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Horizontal scan rate, or horizontal frequency, usually expressed in kilohertz, is the number of times per second that a raster-scan video system transmits or displays a complete horizontal line, as opposed to vertical scan rate, the number of times per second that an entire screenful of image data is transmitted or displayed.
Horizon scanning (HS) or horizon scan is a method from futures studies, sometimes regarded as a part of foresight. [1] It is the early detection and assessment of emerging technologies or threats for mainly policy makers in a domain of choice.
Scan rate is a term used when discussing raster-scan video, describing the speed at which the image is transmitted or displayed. There are two types: There are two types: Horizontal scan rate , the number of times per second that a single horizontal line of image data is transmitted or displayed
Early home computers output video to ordinary televisions or composite monitors, utilizing television display standards such as NTSC, PAL or SECAM.These display standards had fixed scan rates, and only used the vertical and horizontal sync pulses embedded in the video signals to ensure synchronization, not to set the actual scan rates.
On CRT screens the horizontal scan lines are visually discernible, even when viewed from a distance, as alternating colored lines and black lines, especially when a progressive scan signal with below maximum vertical resolution is displayed. [2] This is sometimes used today as a visual effect in computer graphics. [3]
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Scan conversion or scan converting rate is a video processing technique for changing the vertical / horizontal scan frequency of video signal for different purposes and applications. The device which performs this conversion is called a scan converter .
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