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Method and apparatus for digital video de-interlacing and its field sequence detection

A technology of digital video and field sequence, applied in the field of digital video, can solve the problems of reducing user satisfaction, low image quality, and inability to correctly identify, etc., and achieve the effect of improving user satisfaction and image quality

Active Publication Date: 2006-12-13
BEIJING VIMICRO ARTIFICIAL INTELLIGENCE CHIP TECH CO LTD
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Problems solved by technology

[0006] In practical applications, the current 3:2 Pulldown field sequence detection method often has the following problems: due to the use of a fixed or single threshold, the 3:2Pulldown field sequence cannot be correctly identified, which will result in the possibility that the 3:2Pulldown field sequence will not be obtained. The de-interlacing processing corresponding to the telecine mode makes the image quality displayed after the video stream is de-interlaced is low, thereby reducing user satisfaction

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  • Method and apparatus for digital video de-interlacing and its field sequence detection

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Embodiment Construction

[0059] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0060] After an in-depth analysis of the folded field sequence and the ordinary field sequence, it can be concluded that the following two types of field sequences are essentially different in different scenarios and the corresponding better de-interlacing processing methods:

[0061] Specifically, the investigation of the SAD values ​​for each group of 5 is an important part of the 3:2 folded field sequence detection process:

[0062] 1) For motion scenes in ordinary field sequences, the five SAD values ​​are all very large, even if a certain SAD value occasionally appears very small, the position where the SAD value appears will be very random; in this case, it is best Perform de-interlacing processing corresponding to the normal video mode on the received video stream;

[0063] 2) For static scenes in common field sequences, the five SAD ...

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Abstract

The invention relates to a field sequence checking method used in digit video intersection solution and relative device. Wherein, it needs to collect the sum of pixel difference absolute values (SAD) used in field sequence check and select the minimum SAD value as SADMin; judges if the field sequence of SADMin is the motion field, when the result is yes, based on the position PosMin of SADMin to judge if there is copy field represented periodically, and when the result is yes, confirming the received field sequence is folded field sequence. The invention can improve the image quality when playing video flow.

Description

technical field [0001] The invention relates to digital video technology, in particular to a method and device for digital video deinterlacing and field sequence detection. Background technique [0002] 3:2 pulldown (Pulldown) technology is a commonly used technology for converting movie video streams into TV video streams. National Television System Committee (NTSC) standard TV video signal requires about 60 fields / second interlaced video field format, so that the converted video stream can be played normally by TV. Generally, the field video stream converted from the movie video stream may be called a 3:2 Pulldown field sequence. see figure 1 , figure 1 The principle of generating the 3:2 Pulldown field sequence is shown in , which is: use the method of field duplication to generate 10 fields of TV signals according to every 4 frames of images. in particular, figure 1 The even field in is generated by the even-numbered lines of the film frame, and the odd field is gen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/015
Inventor 汪源邱嵩
Owner BEIJING VIMICRO ARTIFICIAL INTELLIGENCE CHIP TECH CO LTD
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