Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/23080
Title: Improved algorithm for detecting zero-quantised discrete cosine transform coefficients in H.264/AVC (revised version)
Authors: Wang, LL
Siu, WC 
Issue Date: 2013
Source: IET Image processing, 2013, v. 7, no. 1, p. 92-97 How to cite?
Journal: IET Image Processing 
Abstract: In this study, an efficient approach for detecting zero-quantised discrete cosine transform (DCT) coefficients for video coding is developed. Compared with conventional detection methods of zero-quantised DCT coefficients used in H.264/AVC, the proposed algorithm has two major features. First, a new classification of patterns for DCT, quantisation, inverse quantisation and inverse discrete cosine transform processes is proposed. By taking a zigzag scanning order into the classification, the quantised DCT coefficients can be coded efficiently. Second, the thresholds for detecting zero-quantised DCT coefficients are determined by combining the Gaussian distribution with a theoretical analysis of the DCT and quantisation in H.264/AVC. Experimental results show that the proposed algorithm achieves an average timesaving of more than 40% compared with the algorithm in reference software JM12.2 of H.264/AVC. When compared with other algorithms in the literature, it also gives the best performance in terms of both rate-distortion and time saving.
URI: http://hdl.handle.net/10397/23080
ISSN: 1751-9659
DOI: 10.1049/iet-ipr.2011.0355
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

Page view(s)

35
Last Week
1
Last month
Checked on Aug 13, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.