A Block Adaptive Bit Allocation for Progressive Transmission of Mean Difference Pyramid Image

Mean difference pyramid 영상의 점진적 전송을 위한 블록 적응 비트 배정

  • 김종훈 (연암공업전문대학 전자과) ;
  • 신재범 (국방과학연구소) ;
  • 심영석 (생산기술연구소 전자정보시스템센터)
  • Published : 1993.04.01

Abstract

In this paper, A progressive coding of mean difference pyramid by Hadamard transform of the difference between two successive pyramid levels has been studied. A block adaptive bit allocation method based on ac energy of each sub-block has been proposed, which efficiently reduces the final distortion in the progressive transmission of image parameters. In our scheme, the dc energy equals the sum of the quantization errors of the Hadamard transform coefficients at previous level. Therefore proposed allocation method includes the estimation of dc energy at each pyramid level. Computer simulation results show some improvements in terms of MSE and picture quality over the conventional fixed allocation scheme.

Keywords