A new optimum-word-length-assignment (OWLA) multiplierless integer DCT for lossless/lossy image coding and its performance evaluation

  • Authors:

  • Somchart Chokchaitam;Masahiro Iwahashi

  • Affiliations:

  • Department of Electrical Engineering, Thammasat University, Phatoom Thani, Thailand;Department of Electrical Engineering, Nagaoka University of Technology, Niigata, Japan

  • Venue:
  • ACIVS'07 Proceedings of the 9th international conference on Advanced concepts for intelligent vision systems
  • Year:
  • 2007

Quantified Score

Hi-index 0.00

Visualization

Abstract

Recently, we proposed a multiplierless 1D Int-DCT improved from our previous proposed Int-DCT by approximating floating multiplications to bit-shift and addition operations. The multiplierless 1D Int-DCT can be well operated both lossless coding and lossy coding. However, our multiplierless 1D Int-DCT is not focused on how to assign word-length for floating-multiplier approximation as short as possible for reduction of hardware complexity. In this paper, we propose a new Optimum-Word-Length-Assignment (OWLA) multiplierless Int-DCT. Apart from inexpensive hardware complexity, the new OWLA multiplierless 1D Int-DCT achieves high coding performance in both lossless and lossy coding. The lossless/lossy coding criterion is applied to evaluate coding performance of the proposed Int-DCT comparing to those of the others Int-DCT.