ETRI Journal

Electronics and Telecommunications Research Institute (한국전자통신연구원)
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Error Concealment Based on Semantic Prioritization with Hardware-Based Face Tracking

  • Lee, Jae-Beom (Mamurian Design) ;
  • Park, Ju-Hyun (Mamurian Design) ;
  • Lee, Hyuk-Jae (School of Electrical Engineering & Computer Science, Seoul National University) ;
  • Lee, Woo-Chan (School of Electrical Engineering & Computer Science, Seoul National University)
  • Received : 2004.02.27
  • Published : 2004.12.31
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Abstract

With video compression standards such as MPEG-4, a transmission error happens in a video-packet basis, rather than in a macroblock basis. In this context, we propose a semantic error prioritization method that determines the size of a video packet based on the importance of its contents. A video packet length is made to be short for an important area such as a facial area in order to reduce the possibility of error accumulation. To facilitate the semantic error prioritization, an efficient hardware algorithm for face tracking is proposed. The increase of hardware complexity is minimal because a motion estimation engine is efficiently re-used for face tracking. Experimental results demonstrate that the facial area is well protected with the proposed scheme.

Keywords

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