basic spectral description - audio spectrum envelope-
DESCRIPTION
Basic Spectral Description - Audio Spectrum Envelope-. 16-2 이 재 남. Definition of Basic Spectral Description. The time series of logarithmic frequency description of the short-term power spectrum. Modeling of Human ear. Audio Spectrum Envelope (1). ASE is a log-frequency power spectrum. - PowerPoint PPT PresentationTRANSCRIPT
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Basic Spectral Description
- Audio Spectrum Envelope-
16-2 이 재 남
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Definition of Basic Spectral Description
• The time series of logarithmic fre-quency description of the short-term power spectrum.
• Modeling of Human ear
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Audio Spectrum Envelope (1)
• ASE is a log-frequency power spec-trum.
• Reduced spectrogram of the origin.
• Obtained by summing the energy of the original power spectrum within series of frequency bands.
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Audio Spectrum Envelope (2)
• The bands are log2 distributed be-tween loEdge and hiEdge.
• R= 2^j octaves (-4<=j<=3)
• Edge = 2^(r*n) * 1kHz
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Audio Spectrum Envelope (3)
• Default hiEdge = 16kHz• Default loEdge = 62.5Hz (8-octave)
• Bin = 8/r
• loFb = loEdge * 2^((b-1)*r)• hiFb = loEdge * 2^(b*r)
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Audio Spectrum Envelope (4)
• ASE(b) = sigma P(k) : from loKb ~ hiKb
• P(k) = abs(S(k))^2
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Audio Spectrum Envelope (5)
• Power spectrum coefficient whose distance to a band edge is less than half the FFT resolution
• To contribute to the ASE coefficients of both neighboring bands.
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Audio Spectrum Envelope (6)
• Out band energy– Powers of the spectrum between 0Hz
and loEdge and between hiEdge and Fs/2
• B=Bin + 2
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허튼소리 하나만
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허튼소리 한번 더
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마지막 허튼소리
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두 가지에서 영향 받지 않는다면 우리 인생은 5 년이 지나도 지금과 똑같을 것이다 .
그 두 가지란 우리가 만나는 사람과 읽는 책이다 .
- 내 인생을 바꾼 한 권의 책 중에서 -
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We always have no time!!
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We always have time !!
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We always have money !!
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We always have knowledge!!
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