Dynamic measurement rate allocation for distributed compressive video sensing

Hung Wei Chen*, Li Wei Kang, Chun Shien Lu

*此作品的通信作者

研究成果: 書貢獻/報告類型會議論文篇章

45 引文 斯高帕斯(Scopus)

摘要

We address an important issue of fully low-cost and low-complexity video encoding for use in resource limited sensors/devices. Conventional distributed video coding (DVC) does not actually meet this requirement because the acquisition of video sequences still relies on the high-cost mechanism (sampling + compression). Recently, we have proposed a distributed compressive video sensing (DCVS) framework to directly capture compressed video data called measurements, while exploiting correlations among successive frames for video reconstruction at the decoder. The core is to integrate the respective characteristics of DVC and compressive sensing (CS) to achieve CS-based single-pixel camera-compatible video encoder. At DCVS decoder, video reconstruction can be formulated as a convex unconstrained optimization problem via solving the sparse coefficients with respect to some basis functions. Nevertheless, the issue of measurement rate allocation has not been considered yet in the literature. Actually, different measurement rates should be adaptively assigned to different local regions by considering the sparsity of each region for improving reconstructed quality. This paper investigates dynamic measurement rate allocation in block-based DCVS, which can adaptively adjust measurement rates by estimating the sparsity of each block via feedback information. Simulation results have indicated the effectiveness of our scheme. It is worth noting that our goal is to develop a novel fully low-complexity video compression paradigm via the emerging compressive sensing and sparse representation technologies, and provide an alternative scheme adaptive to the environment, where raw video data is not available, instead of competing compression performances against the current compression standards (e.g., H.264/AVC) or DVC schemes which need raw data available for encoding.

原文英語
主出版物標題Visual Communications and Image Processing 2010
DOIs
出版狀態已發佈 - 2010
對外發佈
事件Visual Communications and Image Processing 2010 - Huangshan, 中国
持續時間: 2010 七月 112010 七月 14

出版系列

名字Proceedings of SPIE - The International Society for Optical Engineering
7744
ISSN(列印)0277-786X

會議

會議Visual Communications and Image Processing 2010
國家/地區中国
城市Huangshan
期間2010/07/112010/07/14

ASJC Scopus subject areas

  • 電子、光磁材料
  • 凝聚態物理學
  • 電腦科學應用
  • 應用數學
  • 電氣與電子工程

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