Efficient Control for the Distortion Incurred by Dropping DCT Coefficients in Compressed Domain

  • Kim Jin-Soo (Dept. of Multimedia Engineering, Hanbat National University) ;
  • Yun Mong-Han (Dept. of Multimedia Engineering, Hanbat National University) ;
  • Park Jong-Kab (Dept. of Multimedia Engineering, Hanbat National University)
  • 발행 : 2005.12.01

초록

The primary goal of this paper is to facilitate the rate-distortion control in compressed domain, without introducing a full decoding and re-encoding system in pixel domain. For this aim, the error propagation behavior over several frame-sequences due to DCT coefficients-drop is investigated on the basis of statistical and empirical properties. Then, such properties are used to develop a simple estimation model for the CD distortion accounting for the characteristics of the underlying coded-frame. Experimental results show that the proposed model allows us to effectively control rate-distortions into coded-frames over different kinds of video sequences.

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