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An Introduction to Audio Content Analysis: Applications in - download pdf or read online

By Alexander Lerch

ISBN-10: 111826682X

ISBN-13: 9781118266823

ISBN-10: 1118393554

ISBN-13: 9781118393550

With the proliferation of electronic audio distribution over electronic media, audio content material research is speedy turning into a demand for designers of clever signal-adaptive audio processing platforms. Written through a well known specialist within the box, this e-book presents easy accessibility to various research algorithms and permits comparability among varied ways to an analogous activity, making it worthwhile for newbies to audio sign processing and specialists alike. A assessment of proper basics in audio sign processing, psychoacoustics, and tune conception, in addition to downloadable MATLAB records also are included.

Please stopover at the better half site: www.AudioContentAnalysis.org

Content:
Chapter 1 advent (pages 1–5):
Chapter 2 basics (pages 7–30):
Chapter three immediate beneficial properties (pages 31–69):
Chapter four depth (pages 71–78):
Chapter five Tonal research (pages 79–117):
Chapter 6 Temporal research (pages 119–137):
Chapter 7 Alignment (pages 139–150):
Chapter eight Musical style, Similarity, and temper (pages 151–162):
Chapter nine Audio Fingerprinting (pages 163–167):
Chapter 10 tune functionality research (pages 169–179):

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Download PDF by Alexander Lerch: An Introduction to Audio Content Analysis: Applications in

With the proliferation of electronic audio distribution over electronic media, audio content material research is quickly changing into a demand for designers of clever signal-adaptive audio processing platforms. Written through a well known specialist within the box, this booklet presents easy accessibility to varied research algorithms and permits comparability among varied techniques to a similar job, making it precious for rookies to audio sign processing and specialists alike.

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Extra info for An Introduction to Audio Content Analysis: Applications in Signal Processing and Music Informatics

Example text

60) To improve the reliability of the phase unwrapping process the hop size H should be as small as possible. Phase Difference Using Transforms An alternative to computing the phase difference directly is to use two different windows for computing two STFTs of one analysis block. Then, the instantaneous frequency can be computed by s , n „ (XD(k,n)-X*(k,n)\ e, //W1X un(ktn)=U(k) + 3[ \x^n)ir'\ (2-61) with Xo(k, n) being the STFT computed using the derivative of the window used for the calculation of X(k, n) [18].

11 shows the impulse response of such a gammatone filter with the following parametrization: center frequency fc = 1 kHz, bandwidth Δ / = 125 Hz, and order O = 4. Slaney showed that gammatone filters can be efficiently implemented with cascaded second-order filters [25]. A survey of different gammatone filter implementations can be found in [26]. 12 shows the frequency (magnitude) response of a gammatone filterbank as computed by the Auditory Toolbox [27] for 20 bands between 100 Hz and 24 kHz.

2) or to find the time interval between beats in music. 4 Calculation in the Frequency Domain Rewriting either the CCF or the ACF as a convolution operation reveals an important property: oo τχχ(τ) = χ(τ) ■ x(t + τ) dr —oo = X(T)*X(-T). 72) Using Eqs. 73) This relation is called the Wiener-Khinchin theorem. The computation of the ACF in the time domain can thus be replaced by a simple multiplication in the frequency domain preceded and followed by an FT and an inverse FT, respectively. For long blocks this will save computing cycles and reduce computational workload when using an FFT algorithm.

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An Introduction to Audio Content Analysis: Applications in Signal Processing and Music Informatics by Alexander Lerch


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