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Indexed by:期刊论文

Date of Publication:2012-02-01

Journal:JOURNAL OF SIGNAL PROCESSING SYSTEMS FOR SIGNAL IMAGE AND VIDEO TECHNOLOGY

Included Journals:SCIE、EI

Volume:66

Issue:2

Page Number:135-139

ISSN No.:1939-8018

Key Words:Floating-to-fixed-point conversion; Discrete cosine transform; Quantization; Video compression

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.