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Method and apparatus for progressive scanning of interlaced video

An interlaced, video technology, applied in the field of motion compensation technology of de-interlacing, which can solve problems such as the influence of motion artifacts

Inactive Publication Date: 2009-02-11
ANALOG DEVICES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As a result, progressive scan is susceptible to motion artifacts due to displaying data acquired at different times at substantially the same time

Method used

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  • Method and apparatus for progressive scanning of interlaced video
  • Method and apparatus for progressive scanning of interlaced video
  • Method and apparatus for progressive scanning of interlaced video

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Embodiment Construction

[0021] As discussed above, progressive scanning of interlaced video is susceptible to motion artifacts resulting from displaying the scan lines in a different temporal order than the temporal order in which interlaced video was acquired. Various de-interlacing methods have been developed to compensate for various motion effects. The first type of motion compensation method, called intra-field, uses only one of the two fields to derive video data for progressive display. Using only half of the available video data results in a significant loss of vertical resolution when using an intra-field approach to address motion artifacts.

[0022] Another type of motion compensation method known as interfield combines data from even and odd fields in the manner previously described, eg, averaging the fields to obtain pixel values ​​for the display scan lines. However, since the data is always combined, there will always be at least some scanlines that are synthesized without true acquis...

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Abstract

A method for deinterlacing an interlaced video signal is provided which employs a median single edge based line average field interpolation algorithm. The algorithm employs a median filter to determine whether motion occurred between scanning two fields of an interlaced frame and, based on the results, reconstructing intermediate lines in the display frame. The median performs a median computation by determining whether a target pixel value is a median value, rather than computing the median value and determining whether the target pixel value is equal to the computed median.

Description

[0001] related application [0002] This application claims priority under 35 U.C.S. §119(e) to U.S. Provisional Application 60 / 752,659, filed December 21, 2005, entitled "FAST MEDIAN SINGLE EDGE BASED LINE AVERAGEFIELD INTERPOLATOR," the entirety of which The contents are hereby incorporated by reference. technical field [0003] The present invention relates generally to progressive display (deinterlacing) of interlaced video, and more particularly to motion compensation techniques for deinterlacing. Background technique [0004] Historically, the de facto standards for capturing (eg recording) and displaying (eg scanning) video have been intertwined. For example, traditional broadcast television, cable TV, etc. have largely adopted the interlaced format. The National Television Systems Committee (NTSC) standard for US television broadcasting specifies that video be provided in an interlaced format at a rate of 30 frames per second (fps). The Phase Alternative Line (PAL...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/44
CPCH04N7/012H04N7/0137
Inventor 潘国林法比安·利斯
Owner ANALOG DEVICES INC