Converting interlaced video into a non-interlaced or progressive form
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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.
An interlaced video frame consists of two fields taken in sequence: the first containing all the odd lines of the image, and the second all the even lines. Analog television employed this technique because it allowed for less transmission bandwidth while keeping a high frame rate for smoother and more life-like motion. A non-interlaced (or progressive scan) signal that uses the same bandwidth only updates the display half as often and was found to create a perceived flicker or stutter. CRT-based displays were able to display interlaced video correctly due to their complete analog nature, blending in the alternating lines seamlessly. However, since the early 2000s, displays such as televisions and computer monitors have become almost entirely digital - in that the display is composed of discrete pixels - and on such displays the interlacing becomes noticeable and can appear as a distracting visual defect. The deinterlacing process should try to minimize these.
Deinterlacing is thus a necessary process and comes built-in to most modern DVD players, Blu-ray players, LCD/LED televisions, digital projectors, TV set-top boxes, professional broadcast equipment, and computer video players and editors - although each with varying levels of quality.
Deinterlacing has been researched for decades and employs complex processing algorithms; however, consistent results have been very hard to achieve.[1][2]
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Jung, J.H.; Hong, S.H. (2011). "Deinterlacing method based on edge direction refinement using weighted maximum frequent filter". Proceedings of the 5th International Conference on Ubiquitous Information Management and Communication. ACM. ISBN 978-1-4503-0571-6.
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appear as a distracting visual defect. The deinterlacing process should try to minimize these. Deinterlacing is thus a necessary process and comes built-in...
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and broadcasting. The main argument is that no matter how complex the deinterlacing algorithm may be, the artifacts in the interlaced signal cannot be completely...
unless special signal processing eliminates them. A procedure known as deinterlacing can optimize the display of an interlaced video signal from an analog...
sub-specifications: Deinterlacing DDI, COPP DDI and ProcAmp DDI. The Deinterlacing DDI specifies the callbacks for deinterlacing operations. The COPP...
interlaced video, therefore interlaced video must be deinterlaced before it is scaled and displayed. Deinterlacing can result in noticeable visual artifacts and/or...
correlational de-interlacing) technology is an advanced deinterlacing algorithm for upconverting and deinterlacing standard definition NTSC content for display on...
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display on progressive-scan—e.g., most new LCD and plasma TVs—it must be deinterlaced. Depending on the television's video processing capabilities, the resulting...
de-interlacing of video signals. For example, a receiver with upconversion, deinterlacing and upscaling can take an interlaced composite signal at 480i (480 lines...
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such as mirroring, rotating, cropping, cloning, adjusting colours, deinterlacing, and equalizing and visualizing audio. Easter eggs may be featured,...
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(VLD), more commonly known as slice-level acceleration Spatial-temporal deinterlacing and automatic interlace/progressive source detection Bitstream processing...
progressive using the process known as deinterlacing. Progressive-scan television sets employ built-in deinterlacing circuits to cope with interlaced broadcast...
which is also known as a fishtail braid A distortion pattern from deinterlacing video called mouse teeth A method of counting used with the unary numeral...
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settings. This turns on deinterlacing, scaling and improved color accuracy. WMP 9 Series introduced native playback for deinterlacing for TV output. Version...
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