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In a 100 Hz/120 Hz analog TV, there is a scan converter circuit which converts the vertical frequency (refresh rate) from standard 50/60 Hz to 100/120 Hz to achieve a low level of flicker which is important in large screen (high inch) TVs. An external TV card receives the TV signals and converts them to VGA or SVGA format to display on monitor.
In the case of material shot on video, improvements in smoothness just from having a higher refresh rate may be barely noticeable. [11] In the case of filmed material, as 120 is an even multiple of 24, it is possible to present a 24 fps sequence without judder on a well-designed 120 Hz display (i.e., so-called 5-5 pulldown).
Flicker-free is a term given to video displays, primarily cathode ray tubes, operating at a high refresh rate to reduce or eliminate the perception of screen flicker.For televisions, this involves operating at a 100 Hz or 120 Hz hertz field rate to eliminate flicker, compared to standard televisions that operate at 50 Hz (PAL, SÉCAM systems) or 60 Hz (), most simply done by displaying each ...
Comparison of a slow down video without interframe interpolation (left) and with motion interpolation (right) Motion interpolation or motion-compensated frame interpolation (MCFI) is a form of video processing in which intermediate film, video or animation frames are generated between existing ones by means of interpolation, in an attempt to make animation more fluid, to compensate for display ...
Older televisions used interlaced video, so among other artifacts, the image jumped one line at half the rate (25 or 30 Hz) that the image changes (50 or 60 Hz). The exact refresh rate necessary to prevent the perception of flicker varies greatly based on the viewing environment.
A low frame rate causes aliasing, yields abrupt motion artifacts, and degrades the video quality. Consequently, the temporal resolution is an important factor affecting video quality. Algorithms for FRC are widely used in applications, including visual quality enhancement, video compression and slow-motion video generation.
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Later 60 Hz monitors could accept 1080p24 content but employed a 3:2 pulldown to display 24p content, creating judder. Many monitors now support signal processing at 120 Hz or higher, allowing 24p content to be displayed without judder by showing each frame for a fixed number of refresh cycles.
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