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Video encoding and decoding method, device and system

A video encoding and encoding technology, which is applied in the field of encoding and decoding, can solve problems such as affecting encoding efficiency and increasing bit stream overhead

Active Publication Date: 2014-01-15
SHANGHAI JIAO TONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When there are many ROIs in a frame of image and the amount of description information is large, the direct compression method will greatly increase the overhead of the bit stream and affect the coding efficiency

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  • Video encoding and decoding method, device and system
  • Video encoding and decoding method, device and system
  • Video encoding and decoding method, device and system

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Embodiment Construction

[0144] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0145] figure 1 It is a flow chart of Embodiment 1 of the video encoding method of the present invention. The subject of execution of the method in this embodiment is a video encoding device, which can be implemented in the form of hardware or software, and can be configured in an encoder, such as figure 1 As shown, the method includes the follow...

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Abstract

The embodiment of the invention provides a video encoding and decoding method, device and system. The method comprises the steps that position information of at least one ROI is detected from a current frame image; on the basis of a preset approximation matching rule, approximation matching is carried out on the position information of the ROI in the current frame image and position information of at least one ROI in a coded image, and position relations between ROIs in the current frame image and ROIs in the coded image are obtained; the position relations are coded to serve as description information of the ROIs in the current frame image. According to the video encoding and decoding method, device and system, compression efficiency of the ROI description information in video data can be improved.

Description

technical field [0001] Embodiments of the present invention relate to coding and decoding technologies, and in particular, to a video coding and decoding method, device, and system. Background technique [0002] Video codec plays a pivotal role in today's information transmission, and it has a very important application in compressing the amount of information and improving video clarity. [0003] At present, video encoding and decoding methods based on Region Of Interest (ROI for short) in video compression technology have become a hot spot. Most of the existing coding methods and strategies adopt similar steps: first classify the image blocks in the video frame, and distinguish the classification areas such as ROI and non-ROI; A quantization parameter, using a small quantization parameter for the ROI, and a large quantization parameter for the non-ROI; finally, encoding the original video frame data according to the obtained quantization parameter. Therefore, description...

Claims

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Application Information

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IPC IPC(8): H04N19/167
CPCH04N19/503H04N19/167H04N19/463
Inventor 陈明亮林巍嶢郑萧桢
Owner SHANGHAI JIAO TONG UNIV