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[Author] Chul Keun KIM(2hit)

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  • Cross-Layer QoS Control for Distributed Video Coding

    Chul Keun KIM  Doug Young SUH  Gwang-Hoon PARK  

     
    LETTER-Multimedia Systems for Communications

      Vol:
    E93-B No:9
      Page(s):
    2485-2488

    We propose a new channel adaptive distributed video coding algorithm, which is adaptive to time-varying available bitrate and packet loss ratio. The proposed method controls the quantization parameter according to channel condition of especially error-prone mobile channel. Simulation shows that the proposed algorithm outperforms the conventional rate-control-only algorithm.

  • Quality and Complexity Controllable DVC Bitstream Organizer

    Chul Keun KIM  Yongwoo CHO  Jongbin PARK  Doug Young SUH  Byeungwoo JEON  

     
    LETTER-Multimedia Systems for Communications

      Vol:
    E95-B No:5
      Page(s):
    1894-1897

    Applying Distributed Video Coding (DVC) to mobile devices that have limited computation and power resources can be a very challenging problem due to its high-complexity decoding. To address this, this paper proposes a DVC bitstream organizer. The proposed DVC bitstream organizer reduces the complexity associated with repetitive channel decoding and SI generation in a flexible manner. It allows users to choose a means of minimizing the computational complexity of the DVC decoder according to their preferences and the device's resource limitations. An experiment shows that the proposed method increases decoding speeds by up to 25 times.