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An Improved Floating-to-Fixed-Point Conversion Scheme for DCT Quantization Algorithm

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Abstract

Conventional fixed-point implementation of the DCT coefficients quantization algorithm in video compression may result in deteriorated image quality. The paper investigates this problem and proposes an improved floating-to-fixed-point conversion scheme. With a proper scaling factor and a new-established look-up table, the proposed fixed-point scheme can obtain bit-wise consistence to the floating-point realization. Experimental results verify the validity of the proposed method.

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Authors and Affiliations

  1. School of Electronic and Information Engineering, Dalian University of Technology, Dalian, 116023, People’s Republic of China

    Lin Wang, Fuliang Yin & Zhe Chen

Authors
  1. Lin Wang
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  2. Fuliang Yin
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  3. Zhe Chen
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Corresponding author

Correspondence to Lin Wang.

Additional information

This work is supported by the Specialized Research Fund for the Doctoral Program of Higher Education of China (200801410015).

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Wang, L., Yin, F. & Chen, Z. An Improved Floating-to-Fixed-Point Conversion Scheme for DCT Quantization Algorithm. J Sign Process Syst 66, 135–139 (2012). https://doi.org/10.1007/s11265-011-0590-1

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  • DOI: https://doi.org/10.1007/s11265-011-0590-1

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