Layer decomposition-based Method and device for encoding and decoding video
A video coding and layer decomposition technology, applied in digital video signal modification, television, image communication, etc., can solve the problems of high object segmentation requirements, background image and foreground image coding cannot refer to each other, and affect coding efficiency, etc.
Active Publication Date: 2011-07-27
华雁智能科技(集团)股份有限公司
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3) The noise of the video signal is usually large, especially when the light is insufficient, the surveillance video will introduce a lot of noise, which greatly affects the coding efficiency, so that there is still a large amount of data in the static area where the image content does not change, resulting in coded codes. increase in flow
Although the object-oriented video coding technology of MPEG4 can also realize video coding for moving target objects and static area objects, but different objects cannot refer to each other, so the compression efficiency is low, and the requirements for object segmentation are high, and the practicability is relatively high. Difference
The slice group method of H.264 also realizes the separate encoding of the background image and the foreground image. This encoding method is only for better error concealment. The encoding between the background image and the foreground image cannot refer to each other, so its compression Efficiency is also limited
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[0096] In the following, the video coding method based on layer decomposition proposed by the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
[0097] attached figure 1 It is a schematic flow chart of a video coding method embodiment of the present invention, and the main process is as follows:
[0098] 1.1. Input an image through video acquisition, communication and disk reading (or other storage media);
[0099] 1.2. Use the previous image to segment and denoise the moving target on the input image, and decompose it into a static layer and a moving layer. For the convenience of expression, the area of the moving layer is a regular area including moving objects. For example, it consists of several A rectangular area composed of macroblocks;
[0100] 1.3. Coding the static layer image, that is, performing intra-frame coding (I frame) and inter-frame coding respectively according to its frame type in the im...
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The invention discloses a layer decomposition-based method and a layer decomposition-based device for encoding and decoding video. The method for encoding each frame of image input in the video comprises the following steps: decomposing the image into a static layer and a mobile layer, assigning the mobile layer image into a mobile layer image group, and assigning the static layer image into a static layer image group; encoding the static layer image and the mobile layer image of the current frame respectively to form an output code stream which comprises the static layer or the mobile layer or an encoding result of the static layer or the mobile layer; and generating a static layer reconstruction image and a mobile layer reconstruction image. The method and the device are applied to video monitoring and video conference, and can improve the prediction precision, thereby improving the compression efficiency and the encoding quality.
Description
technical field [0001] The invention belongs to the technical field of digital video compression coding, and in particular relates to an efficient video coding and decoding method and device for monitoring video. Background technique [0002] The digital video surveillance system has been widely used, and the system scale and quantity are still expanding rapidly. The transmission and recording of video data is the main content of the video surveillance system. Due to the huge amount of digital video data, video compression coding is the key technology of video surveillance. The performance of video compression coding directly affects the performance of video coding monitoring system, including transmission quality and recording time. Higher compression efficiency means that more channels of video signals can be transmitted with lower bandwidth, and longer video recordings can be saved with fewer hard disks. However, the current video coding technologies used for video surve...
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IPC IPC(8): H04N7/26H04N7/50H04N19/103
Inventor 唐慧明卢超虞露林圣辉唐一枝
Owner 华雁智能科技(集团)股份有限公司