Journal of Broadcast Engineering (방송공학회논문지)

The Korean Institute of Broadcast and Media Engineers (한국방송∙미디어공학회)
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Method for signaling intra prediction mode with merging MPM

MPM을 병합하여 인트라 예측 모드를 시그널링하는 방법

  • Kim, Ki-Baek (ICSP Lab. Dep of Electronics Computer Engineering, Hanyang University) ;
  • Lee, Won-Jin (ICSP Lab. Dep of Electronics Computer Engineering, Hanyang University) ;
  • Jeong, Je-Chang (ICSP Lab. Dep of Electronics Computer Engineering, Hanyang University)
  • 김기백 (한양대학교 전자컴퓨터통신공학과 ICSP 연구실) ;
  • 이원진 (한양대학교 전자컴퓨터통신공학과 ICSP 연구실) ;
  • 정제창 (한양대학교 전자컴퓨터통신공학과 ICSP 연구실)
  • Received : 2011.03.17
  • Accepted : 2011.05.16
  • Published : 2011.05.30
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Abstract

In this paper, we proposed an intra coding method with merging intra prediction mode to achieve intra coding gain. The proposed method uses signaling of prediction mode with merging prediction modes, which is different from the conventional method. If the number of blocks that has the same prediction mode compared to that to be predicted from neighboring blocks exceeds the predefined threshold, then the proposed method is used in order to reduce bits of intra prediction mode for coding efficiency. Otherwise the conventional method is used. Experimental results show the proposed method achieves the PSNR gain of about 0.05 dB in RD curve and reduces the bit rates about 1 % compared with H.264/AVC. In particular, the PSNR gain of about 0.1 dB in RD curve and reduces the bit rates about 1.7 % compared with H.264/AVC at low bit-rates. we can know that the proposed method is efficient tool at low bit-rates.

본 논문은 H.264/AVC의 인트라(Intra) 부호화에서 인트라 예측 모드를 병합하여 부호화 성능을 높일 수 있는 기술에 관한 것이다. 제안하는 기술은 기존의 인트라 부호화에서 예측 모드를 시그널링(Signaling) 하는 방법과 다르게 여러 블록의 예측 모드를 병합하는 방법을 사용하여 예측 모드를 시그널링 한다. 기설정한 경계값 이상의 블록이 주변 블록으로부터 예측된 모드와 같을 경우에는 제안된 방법을, 그렇지 않을 경우에는 기존의 방법을 사용하여 시그널링 하여 인트라 예측 모드 비트량을 줄임으로써 부호화 효율을 높이는 방법을 제안하였다. 실험 결과, 제안한 방법은 기존의 방법과 비교하여 약 0.05dB의 PSNR(Peak signal to-noise ratio) 증가, 약 1%의 비트율이 감소하였다. 특히 low bit-rate일 경우, 약 0.1dB의 PSNR 증가, 약 1.7%의 비트율이 감소시킴으로써 low bit-rate에서 효과적임을 알 수 있다.

Keywords

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