Biorthogonal and nonuniform lapped transforms for transform coding with reduced blocking and ringing artifacts

作     者：Malvar, HS 

作者机构：PictureTel Corp Andover MA 01810 USA 

出 版 物：《IEEE TRANSACTIONS ON SIGNAL PROCESSING》 (IEEE Trans Signal Process)

年 卷 期：1998年第46卷第4期

页      面：1043-1053页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 

主　　题：audio coding image coding lapped transforms speech coding transforms 

摘      要：New lapped transforms are introduced, The lapped biorthogonal transform (LET) and hierarchical lapped biorthogonal transform (HLBT) are appropriate for image coding, and the modulated lapped biorthogonal transform (MLBT) and nonuniform modulated lapped biorthogonal transform (NMLBT) are appropriate for audio coding, The HLBT has a significantly lower computational complexity than the lapped orthogonal transform (LOT), essentially no blocking artifacts, and fewer ringing artifacts than the commonly used discrete cosine transform (DCT), The LET and HLBT have transform coding gains that are typically between 0.5 and 1.2 dB higher than that of the DCT, Image coding examples using JPEG and embedded zerotree coders demonstrate the better performance of the LET and HLBT. The NMLBT has fewer ringing artifacts and better reproduction of transient sounds than the MLT, as shown in audio coding examples, Fast algorithms for both the HLBT and the NMLBT are presented.