Dissertation > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Image communication, multimedia communication > Image coding

Non-equilibrium Encoding Scheme of Distributed Video Coding Based on LDPCA

Author TaoChangLi
Tutor CaoXueHong
School Nanjing University of Posts and Telecommunications
Course Signal and Information Processing
Keywords Video Coding Distributed Video Coding Wyner-Ziv video coding LDPCA code Non-equilibrium codec DCT transform Zigzag scan
CLC TN919.81
Type Master's thesis
Year 2012
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Distributed video coding technology with a simple coding end , complex decoder side , the many advantages of high efficiency and robust performance compression . The coding scheme can computational complexity is transferred from the encoding side to the decoding side , thereby reducing the coding complexity , and is therefore very suitable for the encoding side, the resource-constrained (for example, the small storage space , the computing capacity and low power supply ) wireless video transmission applications. Distributed video coding rate control technology as the main research content , cf object to the traditional distributed video coding algorithm , to propose two non - equilibrium codec method , the complexity of the coding end almost unchanged circumstances, to improve the decoding efficiency of the decoding side . This paper focuses on Wyner-Ziv video coding based on LDPCA code system and its rate control method . The two non-equilibrium codec algorithm , the DCT-based non-equilibrium codec and Zigzag scan - based non-equilibrium compiled decoding method . These two non-equilibrium codec algorithm is then applied to the distributed video coding system , has been distributed video coding algorithm based on non- balanced coding . Simulation experiments show that the algorithm has the excellent performance of the decoded faster than traditional equalizer codec algorithm embodied in these two aspects of the decrease in the number of decoding iterations and successful decoding rate decreases .

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