DocumentCode :
2565495
Title :
Modified EZW and SPIHT algorithms for perceptually audio and high quality speech coding
Author :
Ghahabi, Omid ; Savoj, Mohammad H.
Author_Institution :
Dept. of Electr. & Comput. Eng., Shahid Beheshti Univ., Tehran, Iran
fYear :
2009
fDate :
18-19 Nov. 2009
Firstpage :
530
Lastpage :
535
Abstract :
This paper evaluates the problems of implementing two well-known zero-tree-based re-encoding schemes of Embedded Zero-tree Wavelet (EZW) and the set partitioning in hierarchical trees (SPIHT) for perceptually audio and high quality speech coding. Since the original EZW and SPIHT algorithms are designed for image compression, some new modifications have been implemented in these schemes for their better matching with audio signals. The performances of these two re-encoders are compared in terms of average output bit rate and computation time of a same codec. It is concluded that the proposed modifications can improve the performance of both algorithms by about 20-30%. Furthermore, it is shown that the modified EZW algorithm achieves relatively better average bit rates although it has lower speed in comparison to the modified SPIHT algorithm.
Keywords :
audio coding; image coding; speech codecs; speech coding; trees (mathematics); wavelet transforms; EZW algorithms; SPIHT algorithms; audio coding; audio signals; codec; embedded zero-tree wavelet; hierarchical trees; high quality speech coding; image compression; set partitioning; zero-tree-based reencoding schemes; Bandwidth; Bit rate; Decoding; Image coding; Internet; Signal design; Speech codecs; Speech coding; Wavelet packets; Wavelet transforms; EZW; Perceptually Speech Compression; SPIHT; Wavelet Packet Transform (WPT); Zero-tree;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Signal and Image Processing Applications (ICSIPA), 2009 IEEE International Conference on
Conference_Location :
Kuala Lumpur
Print_ISBN :
978-1-4244-5560-7
Type :
conf
DOI :
10.1109/ICSIPA.2009.5478714
Filename :
5478714
Link To Document :
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