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	Nonuniform filter banks for audio encoding
	Yan Jianxin ; Dou Weibei ; Dong Zaiwang
	2010-05-06 ; 2010-05-06
关键词	Practical Theoretical or Mathematical/ audio coding channel bank filters transforms/ nonuniform filter bank audio encoding time-frequency mapping generalized frequency-varying extended lapped transform frequency-varying modulated lapped transform variable time-frequency resolution/ B6130C Speech and audio coding B6140B Filtering methods in signal processing B0230 Integral transforms
中文摘要	Time-frequency mapping (TFM) of audio coding is improved by generalized FV-ELT (frequency-varying extended lapped transforms) derived based on FV-MLT (frequency-varying modulated lapped transforms). A class of nonuniform filter banks was constructed using FV-ELT with a variable time-frequency resolution. The filters provide more flexible TFM when applied to transient signals, while guaranteeing a higher frequency resolution for stationary signals. Theoretical analysis shows that FV-ELT give a higher transform gain than FV-MLT or MLT. Simulation results for an example with 8 nonuniform subbands shows that FV-ELT are superior to FV-MLT for some frequency properties. Thus, FV-ELT are a class of TFM filter banks for audio encoding with a higher encoding efficiency.
语种	英语 ; 英语
出版者	Tsinghua Univ. Press ; China
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/11930]
专题	清华大学
推荐引用方式 GB/T 7714	Yan Jianxin,Dou Weibei,Dong Zaiwang. Nonuniform filter banks for audio encoding[J],2010, 2010.
APA	Yan Jianxin,Dou Weibei,&Dong Zaiwang.(2010).Nonuniform filter banks for audio encoding..
MLA	Yan Jianxin,et al."Nonuniform filter banks for audio encoding".(2010).

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