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Studies of Distrubuted Video Coding Algorithm Based on Joint Bit-Plane

Author: HuangYing
Tutor: LiXueMing
School: Beijing University of Posts and Telecommunications
Course: Signal and Information Processing
Keywords: Distributed Video Coding Joint bit-plane LDPCA Wyner-Ziv Slepian-Wolf
CLC: TN919.81
Type: Master's thesis
Year: 2010
Downloads: 51
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Abstract


The distributed video coding is a new video coding mode, it is compared with the conventional video coding biggest difference is that the computational complexity is moved from the encoding side to the decoding side . Distributed Video Coding using independent coding and the way of joint decoding , the transfer of motion estimation and motion compensation to the completion of the decoding side , in order to achieve the simplification of the encoding side . This new video encoding technology is applicable to low computing power , storage space is limited , small power consumption wireless terminal , and therefore has a very wide range of applications in the field of wireless video networks, wireless monitoring , sensor networks . This paper studies distributed video coding algorithm based on the joint bit-plane , first introduced the basic principle of distributed video coding , briefly the principle of low density parity check accumulate codes (LDPCA) , codec and apply it to distributed The video coding system . Based on the joint bit plane decoding algorithm is to use the results of the already decoded bit-planes as a priori conditions , on the basis of the conditional probability of the current bit of the bit plane decoder, to increase the correlation between the various levels of the original sequence , thereby improving the decoding efficiency . By a statistical method , the different parameters of the statistical model to establish a corresponding probability table , having similar statistical properties of the model can be lookup table to obtain the corresponding conditional probability , substituting into the Wyner-Ziv decoder in order to achieve rapid and efficient decoding can not increase decoding the distributed video coding is the complexity of the case to enhance the rate-distortion performance . In this paper, of video sequence Miss Am Foreman, Carphone and Mobile ( four sequences are QCIF 30fps ) of 200 the codec tests to verify the performance of the joint bit face decoding algorithm . The simulation results show that the Joint bit face decoding algorithm for distributed video coding system than independent decoding the bit face systems can significantly save the bit rate , bit rate savings of up to 20% to about 30% .

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