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

作者：Wang, Lin^*; Yin, Fuliang; Chen, Zhe

来源：Journal of Signal Processing Systems for Signal Image and Video Technology, 2012, 66(2): 135-139.

DOI：10.1007/s11265-011-0590-1

• Floating-to-fixed-point conversion
• Discrete cosine transform
• Quantization
• Video compression

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.

• 出版日期2012-2
• 单位大连理工大学