Wireless multimedia sensor network-oriented video compression method

Abstract

The invention provides a wireless multimedia sensor network-oriented video compression method, which solves the problem of large data volume in video application. Due to the adoption of the method, code rate is reduced and the quality of a decoded image is improved at the same time, and at last, the energy consumption of a node of the sensor is reduced, so that the life cycle of a network is prolonged. In the method, encoding in a strenuous motion area and in a motion edge area is enhanced by adopting an ROI distinguishing algorithm, and the decoded image is postprocessed by adopting a deblocking filter, so that the subjective quality of the decoded image is further improved. On the basis of a Wyner-Ziv distributed video encoding scheme, the strenuous motion area is extracted through an ROI judging criterion based on an image gradient field and based on Huffman encoding and decoding compression is preformed, and the other areas are encoded and decoded based on the LDPC distribution type, so that the method has the advantages of reducing code rate, improving the quality of the decoded image, reducing the processing and transmission energy consumption of the nodes, implementing the optimized transmission of video and prolonging the life cycle of the whole network.

Description

technical field The invention is a technical proposal for multimedia data compression in a wireless multimedia sensor network (Wireless Multimedia SensorNetworks, WMSN). It is mainly used to solve the problem of video compression coding and improve the quality of decoded images as much as possible, and belongs to the field of computer wireless communication technology. Background technique In recent years, with the development of wireless multimedia communication technology, more and more video application requirements have emerged, such as: wireless multimedia sensor network, mobile videophone, wireless video surveillance, wireless PC camera, etc. In wireless multimedia sensor networks, video applications need to process a large amount of data. Due to the limited computing power or energy of nodes, traditional video coding standards are no longer suitable for wireless video applications. A new video coding and decoding framework - Distributed Video Coding (Distributed Vide...

AI Technical Summary

Problems solved by technology

Technical problem: the purpose of this invention is to propose a video compression method for wi

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