Title :
A scalable digital audio encoder based on embedded zerotree wavelet
Author :
Yan, Jianxin ; Dong, Zaiwang ; Dou, Weibei
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing, China
Abstract :
In this paper, a scalable audio scheme is presented, which is mainly based on an embedded zerotree wavelet (EZW) coding technology. Firstly, 29 critical subbands are obtained by splitting audio signals with a digital wavelet package transform (DPWT). Then a zerotree coding is acted on these subbands. Lastly, an entropy coding is applied to remove redundancy and a specific frame structure is formed. The resulting encoder can support a scalable bit stream from 16 kbps to 64 kbps with a 4 kbps step size for a single audio channel and the graceful degeneration of subjective audio quality can also be provided.
Keywords :
audio coding; data compression; entropy codes; redundancy; transform coding; wavelet transforms; 16 to 64 kbit/s; audio coding; critical subband; digital wavelet package transform; embedded zerotree wavelet coding technology; entropy coding; frame structure; redundancy; scalable digital audio encoder; single audio channel; subjective audio quality; zerotree coding; Audio coding; Entropy coding; Frequency; MPEG 4 Standard; Packaging; Psychoacoustic models; Psychology; Signal processing; Streaming media; Wavelet transforms;
Conference_Titel :
Communication Technology Proceedings, 2003. ICCT 2003. International Conference on
Print_ISBN :
7-5635-0686-1
DOI :
10.1109/ICCT.2003.1209891
