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

EURASIP Journal on Advances in Signal Processing volume 2007, Article number: 043948 (2007) Cite this article

Abstract

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.

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Authors and Affiliations

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

    Sarp Ertürk

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  1. Sarp Ertürk
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Correspondence to Sarp Ertürk.

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Open Access This article is distributed under the terms of the Creative Commons Attribution 2.0 International License (https://doi.org/creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Ertürk, S. Warped Discrete Cosine Transform-Based Low Bit-Rate Block Coding Using Image Downsampling. EURASIP J. Adv. Signal Process. 2007, 043948 (2007). https://doi.org/10.1155/2007/43948

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  • DOI: https://doi.org/10.1155/2007/43948

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