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Video monitoring coding method and device

A technology for video surveillance and video coding, applied in the fields of digital video signal modification, TV, color TV, etc., can solve the problems that affect the implementation effect of video surveillance technology, cannot display video image effects, and video image quality varies greatly.

Active Publication Date: 2012-07-11
CHINA MOBILE COMM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the same set of encoding configuration schemes are uniformly used to encode the video images monitored in many different monitoring scenarios in the same way, the video encoding quality cannot achieve the optimal effect, and the quality of the reconstructed video images after compression is also very different. The effect of presenting a consistent surveillance video image, thus affecting the implementation effect of video surveillance technology

Method used

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  • Video monitoring coding method and device
  • Video monitoring coding method and device

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Experimental program
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Embodiment 1

[0051] Embodiment 1, the discrimination of motion / stationary scene:

[0052] Such as Figure 4 As shown, it is a processing flow chart for judging whether a video monitoring scene is a motion / stationary scene proposed by an embodiment of the present invention, wherein motion detection can be used to judge whether a video monitoring scene is a motion scene or a static scene, and the current frame of the video to be monitored Subtract the image from the previous frame to obtain the residual frame. If there is no movement in the corresponding positions of the two frames of images before and after, the brightness value of the pixels corresponding to the obtained residual frame (abbreviated as the brightness value) is zero; Pixel Luminance Value Non-zero luminance value. The luminance value of each pixel in the residual frame is counted. If the ratio of the number of pixels with non-zero luminance value to the number of all pixels contained in the residual frame is greater than a...

Embodiment 2

[0059] Embodiment 2, Discrimination of Daytime / Nighttime Scenes:

[0060] Such as Figure 6 As shown, it is a processing flow chart for judging that a video surveillance scene is a daytime / nighttime scene proposed by the embodiment of the present invention. The embodiment of the present invention is based on the brightness value in the image frame representing the brightness of the image, and by counting the brightness of all pixels in a frame of image If the average brightness value obtained by statistics is greater than a certain threshold value, it can be judged that the monitoring scene where the front-end video surveillance device is located is a daytime scene; if the average brightness value obtained by statistics is lower than this threshold value, it can be judged that the front-end video surveillance The monitoring scene where the device is located is a night scene. The specific implementation process is as follows:

[0061] Step 60, obtaining the current video imag...

Embodiment 3

[0066] Embodiment 3, indoor / outdoor scene discrimination:

[0067] Such as Figure 8 As shown, it is a processing flow chart for distinguishing a video monitoring scene as an indoor / outdoor scene proposed by the embodiment of the present invention. The embodiment of the present invention distinguishes between an indoor monitoring scene or an outdoor monitoring scene and mainly focuses on whether the video image frame has uniform illumination. The monitored video image frames generally have uneven illumination, such as lighting and other effects. Divide a monitored frame of image into blocks of 16×16 pixels (of course, it can also be divided into blocks of other sizes, such as pixel blocks of 8×8, 4×4, etc.), and calculate the pixel blocks obtained by each division The brightness mean value Y of the maximum brightness value Y of the pixel block in a frame of image is obtained max and minimum brightness mean Y min , as obtained by Y max and Y min If the following formula is...

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Abstract

The invention discloses a video monitoring coding method and device, wherein the video monitoring coding method comprises the steps of: judging a monitoring scene where a front end video monitoring device is in in current; according to a preset correspondence between the monitoring scene and a video coding mode, determining a video coding mode corresponding to the judged monitoring scene; and coding video image information monitored by the front end video monitoring device according to the determined video coding mode. According to the invention, adaptive coding modes are adopted for video images monitored under different monitoring scenes, thus image coding quality of video monitoring is improved.

Description

technical field [0001] The invention relates to the technical field of video monitoring. Background technique [0002] At present, with the maturity of the security industry and the large-scale construction of safe cities and safe campuses, people pay more and more attention to real-time remote monitoring, and video surveillance has been more and more widely used. Video surveillance has also evolved from wired to wireless to meet the ever-increasing requirements for mobility and convenience. However, due to the limited uplink bandwidth of 3G wireless networks such as TD-SCDMA, the transmission quality of video surveillance images is poor, which greatly affects the effect of video surveillance. [0003] While increasing the transmission bandwidth of the wireless network, it is also necessary to optimize the video encoding method at the source end to improve the quality of video image transmission under the existing wireless network conditions. However, in general, there are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/18H04N7/26H04N7/50H04N5/14H04N19/137H04N19/139H04N19/142
Inventor 杨黎波柴鑫刚张俭
Owner CHINA MOBILE COMM GRP CO LTD
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