Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2012-02-01

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

Included Journals: EI、SCIE

Volume: 66

Issue: 2

Page Number: 135-139

ISSN: 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.