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Performance Improvement of Distributed Compressive Video Sensing Using Reliability Estimation

신뢰성 예측을 이용한 분산 압축 비디오 센싱의 성능 개선

  • 김진수 (한밭대학교 정보통신공학과)
  • Received : 2018.10.03
  • Accepted : 2018.10.31
  • Published : 2018.12.31

Abstract

Recently, remote sensing video applications have become increasingly important in many wireless networks. Distributed compressive video sensing (DCVS) framework in these applications has been studied to reduce encoding complexity and to simultaneously capture and compress video data. Specially, a motion compensated block compressed sensing with smoothed projected Landweber (MC-BCS-SPL) has been actively researched for one useful algorithm of DCVS schemes, However, conventional MC-BCS-SPL schemes do not provide good visual qualities in reconstructed Wyner-Ziv (WZ) frames. In this paper, the conventional schemes of MC-BCS-SPL are described and then upgraded to provide better visual qualities in WZ frames by introducing reliability estimate between adjacent key frames and by constructing efficiently motion-compensated interpolated frames. Through experimental results, it is shown that the proposed algorithm is effective in providing better visual qualities than conventional algorithm.

최근에 원거리 비디오 센싱과 같은 응용은 많은 무선 네트워크에 중요한 응용으로 크게 관심을 받고 있다. 분산 압축 비디오 센싱기술은 높은 부호화 복잡도를 간단히 하고, 동시에 비디오 데이터를 캡처함과 동시에 압축함으로써 이 분야에 적용 가능한 기술로 고려되고 있다. 특히, 움직임 보상 블록 압축센싱 기술인 MC-BCS-SPL은 분산 압축 비디오 센싱 방법 중에 효과적인 기술로서 고려되고 있으나, 복원된 위너-지브 프레임에서 우수하지 못한 성능을 제공한다. 본 논문에서는 기존의 MC-BCS-SPL 알고리즘을 살펴보고, 이웃하는 키프레임 사이에 신뢰성에 기초하여 효과적으로 움직임 보상 프레임을 얻는 방법을 도입함으로써 우수한 화질을 제공하는 방법을 제안한다. 다양한 실험 결과를 통하여 제안한 알고리즘은 기존의 알고리즘에 비해 우수한 화질을 제공할 수 있음을 확인한다.

Keywords

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Fig. 1 MC-BCS-SPL Structure[2]

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Fig. 2 Formulation of Pseudo-Code in BCS-SPL and MC-BCS-SPL (a) BCS-SPL[2] (b) MC-BCS-SPL[3]

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Fig. 3 Pseudo-Code for RMSE-Based Reconstruction[8]. (a) RMSE-Based MC-BC-SPL Algorithm (b) Residual Reconstruction

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Fig. 4 Pseudo-Code for Correlation-Based Reconstruction[9] (a) Correlation-Based MC-BC-SPL Algorithm (b) Residual Reconstruction

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Fig. 5 Proposed MC-BCS-SPL algorithm (a) the proposed MC-BCS-SPL algorithm and (b) the part of pixel-domain reconstruction

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Fig. 6 Bilateral Motion Estimation (a) Initial forward Motion Estimation and (b) the Bilateral Motion Estimation

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Fig. 7 PSNR Performance Comparison between the Proposed Algorithm and the Conventional Algorithms (a) Foreman (b) Susie (c) Football

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Fig. 8 RD Performances Comparison (a) Foreman (b) Susie

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