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A Method for Improving Anchor Picture Quality of Multiview Video Coding Scheme

다시점 비디오 부호화의 기준 영상 화질 향상 방법

  • Park, Min-Woo (College of Electronics and Information Kyung Hee University) ;
  • Park, Jong-Tae (College of Electronics and Information Kyung Hee University) ;
  • Park, Gwang-Hoon (College of Electronics and Information Kyung Hee University)
  • 박민우 (경희대학교 전자정보대학) ;
  • 박종태 (경희대학교 전자정보대학) ;
  • 박광훈 (경희대학교 전자정보대학)
  • Published : 2008.05.30

Abstract

This paper introduces a cost-effective method fur improving anchor picture quality of a multiview video coding scheme that is mainly based on chroma compensation. Proposed method is applied to both INTER $16{\times}16$ and SKIP modes in only anchor P-pictures. By testing using JVT common test conditions, simulation results show that proposed method can obtain the average BD-PSNR gains fur U and V as 0.136 dB and 0.127 dB, respectively, while maintaining almost same performance for Y (luminance). For the range of low bit-rates, it is observed that average BD-PSNR gains of Y, U, and V are 0.141 dB, 0.494 dB and 0.525 dB, respectively. Necessary computational complexity is very marginal because the number of anchor P-pictures is only 4.18% in comparison with whole coded sequences, however it can be found that the proposed method can significantly improve the coding efficiencies of color components.

본 논문에서는 다시점 비디오 부호화에서 색차 보상을 적용하여 비용면에서 효과적으로 기준 영상의 품질을 향상시키는 방법을 소개한다. 제안하는 방법은 기준 P-영상에만 적용이 되며, 그 중에서도 INTER $16{\times}16$ 모드와 SKIP 모드에만 적용된다. JVT의 공통 실험 조건을 사용하여 실험을 수행하였을 경우, 휘도 성분 신호인 Y 신호에서 거의 동일한 성능을 유지하면서, 색차 성분인 U, V 신호에 대해 평균 BD-PSNR이 각각 0.136 dB, 0127 dB 향상되었고, 저비트율 실험에서는 Y, U, V 신호에 대해 평균 BD-PSNR이 각각 0.141 dB, 0.494 dB, 0.525 dB 향상되었다. 제안하는 방법을 적용하는 기준 P-영상의 비중은 전체 영상 시퀀스에서 4.18%로 상당히 비중이 작기 때문에 필요한 계산 복잡도는 상당히 낮다고 할 수 있으며, 이에 비해 색상 정보의 부호화 효율은 매우 향상되었음을 확인할 수 있다.

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