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    National Tsing Hua University Institutional Repository > 電機資訊學院 > 電機工程學系 > 期刊論文 >  Low-Overhead Content-Adaptive Spatial Scalability for Scalable Video Coding

    Please use this identifier to cite or link to this item: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/83637

    Title: Low-Overhead Content-Adaptive Spatial Scalability for Scalable Video Coding
    Authors: Chia-Wen Lin;Chia-Ming Tsai;Po-Chun Chen
    教師: 林嘉文
    Date: 2013
    Publisher: Institute of Electrical and Electronics Engineers
    Relation: IEEE Journal of Selected Topics in Signal Processing, Institute of Electrical and Electronics Engineers, Volume 7, Issue 6, Dec. 2013, Pages 1084 - 1095
    Keywords: Inter-layer prediction
    scalable video coding
    spatial scalability
    video adaptation
    video retargeting
    Abstract: To support spatial scalability, the scalable extension of H.264/AVC (SVC) uses video cropping or uniform scaling to downscale the original higher-resolution (HR) sequence to a lower resolution (LR) sequence. Both operations, however, will cause critical visual information loss in the resized frames. To address the problem, we propose a low-overhead content-adaptive spatial scalability SVC (CASS-SVC) coder consisting of three main modules: a mosaic-guided video retargeter, a side-information coder, and a non-homogeneous inter-layer predictive coder. The proposed video retargeting scheme first constructs a panoramic mosaic for each video shot to obtain a compact shot-level global scaling map which is then used to derive the scaling maps of individual frames in the shot. The side information required for the non-homogeneous scaling, including the global scaling maps and the spatial corresponding positions of individual frames to the panoramic mosaic, are then efficiently coded by the side-information coder. The non-homogeneous interlayer prediction coding tools are used to provide good predictions to reduce the bitrates for coding the HR frames. Our simulation results demonstrate that, compared to existing CASS-SVC coders, our method cannot only well preserve subjective quality of important content in the LR sequence, but also significantly improves the coding efficiency of HR sequence.
    Relation Link: http://www.ieee.org/
    URI: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/83637
    Appears in Collections:[電機工程學系] 期刊論文
    [光電研究中心] 期刊論文

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