Method of adaptive regulating video-de-interleaving mode switch frequency

A technology of self-adaptive adjustment and mode switching, applied in the field of digital video, to achieve the effect of improving user satisfaction and image quality

Active Publication Date: 2009-04-22
北京中星天视科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In fact, other similar folded field sequences in the prior art that have one duplicated field in every N fields, such as 24:1 PullDown field sequences, etc., also adopt similar detection procedures and have similar problems

Method used

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  • Method of adaptive regulating video-de-interleaving mode switch frequency
  • Method of adaptive regulating video-de-interleaving mode switch frequency
  • Method of adaptive regulating video-de-interleaving mode switch frequency

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Embodiment Construction

[0048] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0049] The method for adaptively adjusting the switching frequency of the video deinterlacing mode of the present invention is aimed at effectively controlling the switching frequency of the deinterlacing mode. Specifically, the frequency of deinterlacing mode conversion between normal video mode and telecine mode can be dynamically adjusted by adjusting the value of CntrThrOn, and the corresponding adjustment method can be seen in image 3 The process shown, the process includes the following steps:

[0050] Step 300: Obtain the folded field sequence initial threshold CntrThrOn in the field sequence detection process of video deinterlacing, count the deinterlacing mode switching times ModeSwitchCntr in a certain time interval in the field sequence detection process of digital video deinterlacing, and judge the statistics Whether the ModeSwi...

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Abstract

The invention discloses a method for self-adaptively regulating the mode switch-frequency of video de-interlacing, which is applicable for the filed-sequence detecting process of digital video de-interlacing, including: A, obtaining the initial threshold-value of the folding filed-sequence and counting up the switch-frequency of de-interlacing mode, B, increasing the threshold-value to lower the detective sensitivity when the switch-frequency reaches the preset threshold-value, so that a lower switch-frequency is achieved. When the switch-frequency is lower than the threshold-value, it is judged whether the video-flow signal is stable or not. If it is stable, the threshold-value is decreased to the preset point for the normal detective sensitivity.

Description

technical field [0001] The invention relates to digital video technology, in particular to a method for adaptively adjusting switching frequency of video deinterlacing modes in the method for digital video deinterlacing and field sequence detection thereof. 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 i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/01
Inventor 汪源邱嵩
Owner 北京中星天视科技有限公司
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