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보조정보의 시공간 통계 특성에 기초한 신뢰도 예측에 의한 분산 비디오 부호화

Distributed Video Coding with Reliability Estimation Based on Spatio-temporal Statistical Characteristics of Side Information

  • Kim, Jin-Soo (Department of Information and Communication Engineering, Hanbat National University)
  • 투고 : 2013.02.13
  • 심사 : 2013.04.08
  • 발행 : 2013.07.31

초록

낮은 채널 전송율을 갖거나 낮은 부호화 자원을 지원하는 응용을 위해 분산 비디오 부호화 기법이 요구된다. 그러나 기존의 분산 비디오 부호화 기법에 대한 성능제약을 갖고 있으며, 이를 극복하고 부호화 효율을 개선하기 위한 방법으로서 복호화기에서 보조정보의 움직임 정보를 부호화기측으로 전송하는 방법을 시도하고 있다. 본 논문에서는 기존에 움직임 정보를 부호화기측으로 전송하는 방식을 갖는 시스템에서 부호화 효율을 개선하기 위해 보조정보의 비신뢰 블록을 추출하고 이 추출된 블록들에 대한 위치정보를 전송하는 방식을 제안한다. 이를 위해 보조정보를 구성하는 블록단위에 대하여 효과적인 비신뢰성을 측정하는 방식을 제안한다. 모의실험을 통하여 기존의 방식에 비해 더욱 부호화 효율을 개선시킬 수 있음을 보인다.

Distributed video coding technique(DVC) is needed for several applications with low bit rate or low encoding resources. However, since conventional DVC schemes have performance limitations and so as one of the several methods to overcome this problem and to improve the coding efficiency, DVC scheme with the moving information of side information has been developed. Based on this system, in this paper, an efficient reliability estimation is introduced to evaluate the blocks composing of side information and send these blocks location to the encoder side. Then, these enable the encoder to selectively encode and to improve the coding performance. Experimental results show that the proposed scheme performs better than the conventional coding scheme.

키워드

참고문헌

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  6. San-Uk Park et al, "Efficient Distributed Video Coding Using Symmetric Motion Estimation and Channel Division", in PACRIM09, Aug. 2009.
  7. Jin-soo Kim, Jae-Gon Kim and Kwang-deok Seo, "A Selective Block Encoding Scheme Based on Motion Information Feedback in Distributed Video Coding," IEICE Trans. Comm., Vol.E94-B, No.3, pp.860-862, March 2011 https://doi.org/10.1587/transcom.E94.B.860
  8. Jin-soo Kim, Jae-Gon Kim, Kwang-deok Seo and Myung-jin Lee "Distributed Video Coding Based on Selective Block Encoding Using Feedback of Motion Information," Journal of Broadcasting Eng., Vol.15, No.5, pp.642-652, Sept. 2010. https://doi.org/10.5909/JBE.2010.15.5.642
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  10. Jin-soo Kim, Jae-Gon Kim, "An Adaptive Occluded Region Detection and Interpolation for Robust Frame Rate Up-Conversion," International Journal of KIMICS, Vol.8, No.2, pp.201-206, March 2011. https://doi.org/10.6109/jicce.2011.9.2.201
  11. Jin-soo Kim, Jae-Gon Kim and Kwang-deok Seo, "Distortion Estimation Using Block-Adaptive Matching Characteristics for Motion Compensated Interpolation Frame," Journal of Broadcasting Eng., Vol.16, No.6, pp.1058-1068, Nov. 2011. https://doi.org/10.5909/JEB.2011.16.6.1058
  12. Jin-soo Kim, Jae-Gon Kim, Haechul Choi and Kwang-deok Seo, "Pixel-domain Wyner-Ziv Residual Video Coder with Adaptive Binary-to-Gray Code Converting Process", Electronics Letters, Vol. 49, No. 3, Jan. 2013.