deinterlace

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deinterlace

To convert an interlaced image to a progressive scan image. Also called "I to P conversion," deinterlacing is built into most DVD players, A/V receivers, video processors and digital TVs. Most broadcast TV is delivered in 1080i resolution (1080 lines "I"nterlaced) and many DVDs include interlaced content. Deinterlacing fills in the missing lines so that 60 full frames per second can be displayed on HDTV sets. See interlace.

EASIER: Film to Interlaced to Progressive
When a movie shot on film is converted to video, all original content is available in the video frames. Each full movie frame is turned into two interlaced video half frames (see telecine for details), and the half frames can be readily converted back into full frames, restoring the original, progressive sequence. The cadence detection in the deinterlacing process analyzes the frame sequence to determine if the video was originally film in order to deinterlace the frames in this manner (see cadence correction).

MORE DIFFICULT: Interlaced to Progressive
When shooting with a video camera, interlaced video is generated from the start, in which even lines are captured for one half frame followed by the odd lines in the next half frame and so on. Since the camera keeps running and generating half frames, every other line is actually missing in the video frames. In order to deinterlace this originally interlaced video, either the existing even and odd lines are duplicated, called "line doubling," or the missing lines are filled in by analyzing the half frames before and after each half frame. This is where one algorithm can be vastly superior to another. See interlace, DCDi and telecine.


Eliminate the Jaggies
Anchor Bay's VP50Pro video processor cleaned up the original video frame (upper left) by analyzing the scene and applying different algorithms to the static and moving parts of the image. (Image courtesy of Anchor Bay Technologies, Inc., www.anchorbaytech.com)







From 480i to 720p
To convert a 480i signal to 720p or 1080p, the first step is to deinterlace the 480 lines from 480i to 480p and then upconvert to the higher resolution.
References in periodicals archive ?
The Genesis technology portfolio features analog and mixed signal System-on-a-chip design, DCDi(R) by Faroudja deinterlacing, TrueLife(TM) video enhancement and IntelliComb(TM) video decoding and includes over 135 patents.
The FLI2300 is a single-chip digital video format converter that incorporates Faroudja's Emmy award-winning deinterlacing and video enhancement technologies coupled with highly flexible scaling and aspect ratio conversion to convert standard interlaced video signals into high-definition compatible signals.
The Genesis technology portfolio features analog and mixed signal system-on-a-chip design, DCDi[R] by Faroudja deinterlacing, TrueLife[TM] video enhancement, IntelliComb[TM] video decoding and includes over 185 patents.
The Genesis technology portfolio features analog and mixed signal system-on-a-chip design, DCDi[R] by Faroudja deinterlacing, TrueLife video enhancement, IntelliComb video decoding and includes over 185 patents.
HQV's true 1080i to 1080p HD deinterlacing delivers the sharpest, most detailed HD images possible by employing per-pixel motion adaptive algorithms and a sophisticated multi-directional diagonal filter that ensures video free from jagged edges.
HQV's true 1080i-to-1080p HD deinterlacing delivers the sharpest, most detailed HD images possible by employing per-pixel motion-adaptive algorithms and a sophisticated multidirectional diagonal filter that ensures video free of jaggies.
With our award-winning video quality and differentiating features such as support for full 1080p in/1080p out and 1080p Motion Adaptive Deinterlacing processing on both analog and digital TV signals, existing and new Genesis customers can quickly extend their analog TV lineup to include high-quality digital TVs well in time to meet the U.
It includes upconversion from SD to HD with super-resolution deinterlacing and scaling, down and cross conversion, as well as spatio-temporal bandlet noise removal and enhancement.
E[acute accent]Mitsubishi's HC5000BL delivers HQV through Silicon Optix's Reon-VX chip, which provides true HQV four-field, motion-adaptive, per-pixel, high-definition (HD) deinterlacing that delivers the sharpest and most detailed HD images possible.
Mitsubishi's HC5000BL has integrated Reon-VX HQV processing, which provides true HQV four-field, motion-adaptive, per-pixel, HD deinterlacing to deliver the sharpest, most detailed HD images possible.
The Realta HQV video engine encompasses true 10-bit video processing, full four-field, pixel-based, motion-adaptive video deinterlacing for both SD and HD signals, temporal-recursive and codec noise reduction, automatic multicadence detection, and pixel-based detail enhancement.
Realta features no-compromise deinterlacing, 3:2/2:2 and advanced cadence detection, motion-adaptive noise reduction, 1024-tap scaling, detail enhancement, and advanced keystone correction.