Journal of Advanced Navigation Technology (한국항행학회논문지)

The Korean Navigation Institute (한국항행학회)
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Simplified Approach for Distortion Estimation in H.264

H.264에서 간소화된 기법에 의한 왜곡치 예측

  • 박기홍 (목원대학교 일반대학원 IT공학과) ;
  • 김윤호 (목원대학교 컴퓨터공학부)
  • Received : 2010.06.08
  • Accepted : 2010.06.30
  • Published : 2010.06.30
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Abstract

This paper addressed an another scheme of distortion estimation method based on simplified inverse quantization in H.264/AVC. The distortion is calculated by the difference of coefficient between quantized transform coefficients and that of inverse. In general, these process included such transforms as discrete cosine transform(DCT), quantization, inverse quantization(IQ), and Inverse DCT(IDCT). In proposed approach, IQ as well as IDCT process are skipped because of replacing a couple of approximated formulas. Some simulation have been conducted and it showed that the PSNR was almost the same, and reduced the rate-distortion optimization(RDO) mode decision time of 8~15% in comparison with conventional method.

본 논문은 H.264에서 모드 결정을 위한 간소화된 왜곡치 예측 방법을 소개하였다. 왜곡치 계산은 양자화된 변환 계수와 역양자화된 변환 계수의 차이로 계산되는데, 일반적으로 이 과정은 DCT 변환, 양자화, 역양자화 및 역 DCT 변환이 수행되어져야 한다. 제안하는 방식에서는 왜곡치를 계산하기 위하여 일련의 간소화된 수식을 사용함으로써 역양자화 및 역 DCT 과정을 생략하였다. 실험결과, PSNR은 거의 일치하면서도, RDO 모드 결정 시간은 기존의 방식보다 8~15 %의 감소를 보였다.

Keywords

References

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