Low code rate space domain enhancement layer encoding and decoding method based on interested region

A technology of region of interest and coding method, which is applied in the field of scalable video coding, can solve the problem of transmitting large bits, and achieve the effect of reducing the number of bits and improving the PSNR value

Inactive Publication Date: 2009-03-11
WUHAN UNIV
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Problems solved by technology

[0007] The technical problem to be solved by the present invention is: aiming at the problem that the spatial domain enhancement layer coding needs to transmit a large number of bits, combined with the coding method of the region of interest, a low code rate spatial domain enhancement layer coding method based on the region of interest is provided to reduce the space area Enhancement layer code rate to ensure the quality of the video information of the region of interest in the airspace enhancement layer

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  • Low code rate space domain enhancement layer encoding and decoding method based on interested region
  • Low code rate space domain enhancement layer encoding and decoding method based on interested region
  • Low code rate space domain enhancement layer encoding and decoding method based on interested region

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[0027] The present invention provides a method for coding a low-bit-rate spatial domain enhancement layer based on an area of ​​interest. The spatial domain enhancement layer is based on a scalable video codec standard, and the present invention is referred to as an enhancement layer for short. This method loads the ROI information from the base layer, cuts the original input image of the enhancement layer according to the ROI information, and encodes the ROI obtained after clipping. For the special requirements of security monitoring, the invention extracts the region of interest from the enhancement layer for encoding, and ignores the images of other non-critical regions, thereby reducing the code rate of the airspace enhancement layer and ensuring the quality of the video information of the region of interest in the airspace enhancement layer. Then, combined with the common coding method of the existing technology, the principle of the complete image coding process can be fo...

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Abstract

The invention relates to a coding method and a decoding method of a spatial domain enhancement layer with low code rate based on an interested area. The coding method is as follows: the information of the interested area is loaded from a basic layer; original input images of an enhancement layer are cut according to the information of the interested area; and the interested area obtained after cutting is coded. The invention realizes the function of coding the spatial domain enhancement layer with low code rate based on the interested area, greatly decreases a transmitting bit number after the coding of the spatial domain enhancement layer while the quality of the video information in the spatial domain enhancement layer is ensured not to be changed, and is especially suitable for the transmitting requirement of security protection monitoring.

Description

technical field [0001] The invention belongs to the field of scalable video coding, especially for the special requirements of security monitoring, and is based on the current scalable video coding and decoding technology for the spatial domain enhancement layer coding and decoding algorithm for regions of interest. Background technique [0002] With the increasing demand for security, the cost of using security protection and the benefits it generates, the market has put forward the demand for large-scale and long-distance monitoring of industries and enterprises, such as cross-regional network monitoring of banks, and networking of key urban areas across the country. monitoring etc. Due to the disadvantages of analog monitoring such as small range of use and easy attenuation of signals, centralized monitoring methods that transmit images remotely through the network emerged as the times require. [0003] The rapid development of science and technology has made various wir...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N19/167H04N19/176H04N19/33H04N19/34H04N19/503H04N19/593
Inventor 胡瑞敏路依莎刘琼王啟军夏洋
Owner WUHAN UNIV
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