LEADER 05491nam 2200685Ia 450 001 9910143748903321 005 20200520144314.0 010 $a1-280-54162-8 010 $a9786610541621 010 $a0-470-85871-0 010 $a0-470-85865-6 035 $a(CKB)1000000000356076 035 $a(EBL)228335 035 $a(OCoLC)59723855 035 $a(SSID)ssj0000107513 035 $a(PQKBManifestationID)11142936 035 $a(PQKBTitleCode)TC0000107513 035 $a(PQKBWorkID)10012436 035 $a(PQKB)10558163 035 $a(MiAaPQ)EBC228335 035 $a(EXLCZ)991000000000356076 100 $a20040630d2004 uy 0 101 0 $aeng 135 $aur|n|---||||| 181 $ctxt 182 $cc 183 $acr 200 10$aAudio bandwidth extension $eapplication of psychoacoustics, signal processing and loudspeaker design /$fErik Larsen, Ronald M. Aarts 210 $aChichester $cJohn Wiley & Sons$dc2004 215 $a1 online resource (313 p.) 300 $aDescription based upon print version of record. 311 $a0-470-85864-8 320 $aIncludes bibliographical references (p. [269]-284) and index. 327 $aAudio Bandwidth Extension; Contents; Preface; I Introduction; I.1 Bandwidth Defined; I.2 Historic Overview; I.2.1 Electroacoustic Transducers; I.2.2 Sound Quality; I.3 Bandwidth Extension Framework; I.3.1 Introduction; I.3.2 The Framework; 1 From Physics to Psychophysics; 1.1 Signal Theory; 1.1.1 Linear and Non-linear Systems; 1.1.2 Continuous-time LTI (LTC) Systems; 1.1.3 Discrete-time LTI (LTD) Systems; 1.1.4 Other Properties of LTI Systems; 1.1.5 Digital Filters; 1.2 Statistics of Audio Signals; 1.2.1 Speech; 1.2.2 Music; 1.3 Loudspeakers; 1.3.1 Introduction to Acoustics 327 $a1.3.2 Loudspeakers1.3.3 Bessel and Struve Functions; 1.4 Auditory Perception; 1.4.1 Physical Characteristics of the Peripheral Hearing System; 1.4.2 Non-linearity of the Basilar Membrane Response; 1.4.3 Frequency Selectivity and Auditory Filters; 1.4.4 Loudness and Masking; 1.4.5 Pitch; 1.4.6 Timbre; 1.4.7 Auditory Scene Analysis; 1.4.8 Perceptual Modelling - Auditory Image Model; 2 Psychoacoustic Bandwidth Extension for Low Frequencies; 2.1 Introduction; 2.2 Psychoacoustic Effects for Low-frequency Enhancement of Small Loudspeaker Reproduction; 2.2.1 Pitch (Harmonic Structure) 327 $a2.2.2 Timbre (Spectral Envelope)2.2.3 Loudness (Amplitude) and Tone Duration; 2.3 Low-Frequency Psychoacoustic Bandwidth Extension Algorithms; 2.3.1 Overview; 2.3.2 Non-Linear Device; 2.3.3 Filtering; 2.3.4 Gain of Harmonics Signal; 2.4 Low-Frequency Psychoacoustic Bandwidth Extension with Frequency Tracking; 2.4.1 Non-Linear Device; 2.4.2 Frequency Tracking; 2.5 Subjective Performance of Low-Frequency Psychoacoustic Bandwidth Extension Algorithms; 2.5.1 'Virtual Bass'; 2.5.2 'Ultra Bass'; 2.6 Spectral Characteristics of Non-Linear Devices; 2.6.1 Output Spectrum of a Rectifier 327 $a2.6.2 Output Spectrum of Integrator2.6.3 Output Spectra in Discrete Time; 2.6.4 Output Spectrum of Clipper; 3 Low-frequency Physical Bandwidth Extension; 3.1 Introduction; 3.2 Perceptual Considerations; 3.2.1 Pitch (Spectral Fine Structure); 3.2.2 Timbre (Spectral Envelope); 3.2.3 Loudness (Amplitude); 3.3 Low-frequency Physical Bandwidth Extension Algorithms; 3.3.1 Systems with Low-frequency Extension; 3.3.2 Non-linear Device; 3.3.3 Filtering; 3.3.4 Gain of Harmonics Signal; 3.4 Low-frequency Physical Bandwidth Extension Combined with Low-frequency Psychoacoustic Bandwidth Extension 327 $a4 Special Loudspeaker Drivers for Low-frequency Bandwidth Extension4.1 The Force Factor; 4.2 High Force Factor Drivers; 4.3 Low Force Factor Drivers; 4.3.1 Optimal Force Factor; 4.4 Transient Response; 4.4.1 Gated Sinusoid Response; 4.4.2 Impulse Response; 4.5 Details of Lumped-element Parameters and Efficiency; 4.6 Discussion; 5 High-frequency Bandwidth Extension for Audio; 5.1 Introduction; 5.2 The Limits of Deconvolution; 5.3 Perceptual Considerations; 5.3.1 Pitch (Harmonic Structure); 5.3.2 Timbre (Spectral Envelope); 5.3.3 Loudness (Amplitude); 5.3.4 Effects of Hearing Loss 327 $a5.3.5 Conclusions 330 $aBandwidth extension (BWE) refers to various methods that increase either the perceived or real frequency spectrum (bandwidth) of audio signals. Such frequency extension is desirable if at some point the frequency content of the audio signal has been reduced, as can happen for example during recording, transmission or reproduction. This volume, significant in dealing exclusively with BWE, discusses applications to music and speech and places particular emphasis on signal processing techniques.Presents an all-encompassing approach to BWE by covering theory, applications and algorithms< 606 $aPsychoacoustics 606 $aSignal processing 606 $aAcoustical engineering 606 $aRadio frequency 606 $aLoudspeakers$xDesign and construction 615 0$aPsychoacoustics. 615 0$aSignal processing. 615 0$aAcoustical engineering. 615 0$aRadio frequency. 615 0$aLoudspeakers$xDesign and construction. 676 $a621.3822 700 $aLarsen$b Erik R.$f1975-$0935703 701 $aAarts$b Ronald M$0521925 801 0$bMiAaPQ 801 1$bMiAaPQ 801 2$bMiAaPQ 906 $aBOOK 912 $a9910143748903321 996 $aAudio bandwidth extension$92107740 997 $aUNINA