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Digital video signal parity field inditification and correction method

A technology of digital video and correction method, applied in the direction of TV, color TV, image communication, etc., can solve the problem of manual correction method, affecting video quality, etc.

Inactive Publication Date: 2009-08-05
COMMUNICATION UNIVERSITY OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Inexperienced programming or video processing personnel may not see these issues, affecting video quality
That is to say, the existing recognition of the parity field of the digital video signal relies on the naked eyes of experienced technicians, and the correction method is artificial

Method used

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  • Digital video signal parity field inditification and correction method
  • Digital video signal parity field inditification and correction method
  • Digital video signal parity field inditification and correction method

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Embodiment Construction

[0037] The specific implementation steps are as follows:

[0038] The original video stream is obtained through the video camera as input, and the original video stream passes through the video capture card and becomes a video data stream and enters the computer, which is processed and calculated by the computer. Include the following steps:

[0039] 1) First, the computer performs brightness edge extraction on the original data stream, and the extraction steps are as follows:

[0040] For each frame of image P input by the video capture card, which contains odd and even field brightness value data, the edge extraction algorithm shown in formula (1) is used:

[0041] Y i =(A*Z 7 +B*Z 8 +C*Z 9 )+(D*Z 4 +E*Z 5 +F*Z 6 )+(G*Z 1+H*Z 2 +I*Z 3 ) (1)

[0042] In the formula: Y i is the brightness value of the i-th pixel after applying the edge detection operator;

[0043] Z 1 ~ Z 9 is the initial brightness value of the pixel corresponding to the edg...

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Abstract

The invention relates to a method for identifying and correcting odd and even fields of a digital video signal, belonging to the field of computer digital video processing. In this method, the original video stream obtained by the video camera is taken as an input, and the video data stream is converted into a video data stream through a video capture card and then entered into a computer for processing and calculation by the computer. The computer reverses the odd and even field sequence of the input video sequence once, compares the edge energy of the original input video sequence and the inverted video sequence (edge ​​energy refers to the sum of the brightness values ​​at the edge of the image), and judges that the smaller one is the field sequence Correct video, and output this video, you can get the video signal with correct field sequence. The invention automatically corrects video sequences with wrong odd and even field sequences, which is convenient for processing and program production by digital processing tools such as computers.

Description

technical field [0001] The invention relates to a method for identifying and correcting odd and even fields of a digital video signal, belonging to the field of computer digital video processing. Background technique [0002] The digitization of TV signals is beneficial to the use of digital processing tools such as computers for processing and program production, but because the digitized video signals, that is, digital video signals, are still interlaced signals, misjudgments of odd and even fields may occur when processing with computers. This is because the existing digital video processing products or software judge whether it is an odd field or an even field according to the serial number 0 or 1, and the order of different digital video processing products or software settings is inconsistent, that is, some set 0 as an odd field, Some set 1 as an odd field, and when the device that sets 0 as an odd field processes a video signal that sets 1 as an odd field, there will ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/01H04N5/14
Inventor 杨盈昀李磊章文辉
Owner COMMUNICATION UNIVERSITY OF CHINA