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  • Research Article
  • Open Access

Warped Discrete Cosine Transform-Based Low Bit-Rate Block Coding Using Image Downsampling

EURASIP Journal on Advances in Signal Processing20072007:043948

  • Received: 18 May 2006
  • Accepted: 6 February 2007
  • Published:


This paper presents warped discrete cosine transform (WDCT)-based low bit-rate block coding using image downsampling. While WDCT aims to improve the performance of conventional DCT by frequency warping, the WDCT has only been applicable to high bit-rate coding applications because of the overhead required to define the parameters of the warping filter. Recently, low bit-rate block coding based on image downsampling prior to block coding followed by upsampling after the decoding process is proposed to improve the compression performance for low bit-rate block coders. This paper demonstrates that a superior performance can be achieved if WDCT is used in conjunction with image downsampling-based block coding for low bit-rate applications.


  • Information Technology
  • Quantum Information
  • Superior Performance
  • Block Code
  • Decode Process

Authors’ Affiliations

Kocaeli University Laboratory of Image and Signal Processing (KULIS), Electronics and Telecommunication Engineering Department, University of Kocaeli, Kocaeli, 41040, Turkey


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© Sarp Ertürk 2007

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.