DocumentCode :
1973130
Title :
Frequency-dependent signal windowing
Author :
Karjalainen, Matti ; Paatero, Tuoms
Author_Institution :
Lab. of Acoust. & Audio Signal Process., Helsinki Univ. of Technol., Finland
fYear :
2001
fDate :
2001
Firstpage :
35
Lastpage :
38
Abstract :
Signal windowing is a temporal weighting operation whereby a signal is multiplied by a function that pays more emphasis on desired parts of the signal and typically attenuates it outside this span, normally to zero, in order to result in a finite support (nonzero part). In audio and acoustics applications it is quite common that better frequency resolution is desirable at low frequencies, while at high frequencies better time resolution calls for a shorter analysis or processing window. In this paper methods to realize and utilize frequency-dependent signal windowing are presented that exhibit this desirable frequency-dependent property. Particularly methods based on time-frequency warping and rewarping of signals are discussed. Audio examples are presented where this technique is found useful
Keywords :
acoustic signal processing; audio signal processing; filtering theory; matrix multiplication; signal resolution; time-frequency analysis; transient response; Kautz filter; acoustics applications; analysis window; audio applications; frequency resolution; frequency-dependent property; frequency-dependent signal windowing; high frequencies; impulse response; low frequencies; signals rewarping; temporal weighting; time domain matrix multiplication; time resolution; time-frequency warping; Acoustic applications; Acoustic signal processing; Convolution; Discrete Fourier transforms; Fourier transforms; Frequency domain analysis; Laboratories; Signal processing; Signal resolution; Time frequency analysis;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Applications of Signal Processing to Audio and Acoustics, 2001 IEEE Workshop on the
Conference_Location :
New Platz, NY
Print_ISBN :
0-7803-7126-7
Type :
conf
DOI :
10.1109/ASPAA.2001.969536
Filename :
969536
Link To Document :
بازگشت