Title :
Integer lapped biorthogonal transform
Author :
Zhong Guangjun ; Lizhi, Cheng ; Huowang, Chen
Author_Institution :
Sch. of Comput., Nat. Univ. of Defense Technol., Changsha, China
Abstract :
A type of lapped biorthogonal transform that can map integers to integers is considered. Based on the computational structure of the proposed lapped transform, an efficient multiplierless algorithm for the lapped biorthogonal transform (LBT), called integer lapped biorthogonal transform (IntLBT), is proposed. The proposed IntLBT is implemented by a series of dyadic lifting steps, and provides fast, efficient computation of the transform coefficients as well as the ability to map integers to integers. Application of the novel IntLBT in lossy image coding gains very competitive results comparing to the performance of the much more complex Cohen-Daubechies-Feauveau (CDF) 9/7-tap biorthogonal wavelet with irrational coefficients
Keywords :
data compression; discrete cosine transforms; image coding; transform coding; computational structure; discrete cosine transform; dyadic lifting steps; efficient multiplierless algorithm; integer DCT; integer lapped biorthogonal transform; irrational coefficients; lossy image coding; transform coefficients; Bit rate; Computational complexity; Discrete cosine transforms; Discrete wavelet transforms; Flowcharts; Image coding; Performance gain; Performance loss; Transform coding; Wavelet transforms;
Conference_Titel :
Image Processing, 2001. Proceedings. 2001 International Conference on
Conference_Location :
Thessaloniki
Print_ISBN :
0-7803-6725-1
DOI :
10.1109/ICIP.2001.958530
