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Deinterlacing is the process of converting interlaced video into a non-interlaced or progressive form. Interlaced video signals are commonly found in analog television , VHS , Laserdisc , digital television ( HDTV ) when in the 1080i format, some DVD titles, and a smaller number of Blu-ray discs.
A line doubler is a device or algorithm used to deinterlace video signals prior to display on a progressive scan display.. The main function of a deinterlacer is to take an interlaced video frame which consists of 60 two-field interlaced fields of an NTSC analogue video signal or 50 fields of a PAL signal, and create a progressive scan output.
Deinterlacing algorithms temporarily store a few frames of interlaced images and then extrapolate extra frame data to make a smooth flicker-free image. This frame storage and processing results in a slight display lag that is visible in business showrooms with a large number of different models on display. Unlike the old unprocessed NTSC signal ...
In the United States and other countries where television uses the 59.94 Hz vertical scanning frequency, video is broadcast at 29.97 frame/s. For the film's motion to be accurately rendered on the video signal, a telecine must use a technique called the 2:3 pull down (or a variant called 3:2 pull down) to convert from 24 to 29.97 frame/s.
Converting fields to a still frame image requires a process called deinterlacing, in which the missing lines are duplicated or interpolated to recreate the information that would have been contained in the discarded field. Since each field contains only half of the information of a full frame, however, deinterlaced images do not have the ...
24 frame/s to 120 frame/s (3:2 pulldown followed by 2× deinterlacing): pulldown is 6:4; Mainframe Entertainment used a novel process for its TV shows. They are rendered at exactly 25.000 frames per second; then, for PAL/SECAM distribution, ordinary 2:2 pulldown is applied, but for NTSC distribution, 199 fields out of every 1001 are repeated.
External flicker fixer. A flicker fixer or scan doubler is a piece of computer hardware that de-interlaces an output video signal. The flicker fixer accomplishes this by adjusting the timing of the natively interlaced video signal to suit the needs of a progressive display for example a CRT computer monitor.
DirectX Video Acceleration (DXVA) is a Microsoft API specification for the Microsoft Windows and Xbox 360 platforms that allows video decoding to be hardware-accelerated.The pipeline allows certain CPU-intensive operations such as iDCT, motion compensation and deinterlacing to be offloaded to the GPU.