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1answer
44 views

Division by zero in Levinson–Durbin recursion?

I am doing a LPC analysis of a speech signal using the autocorrelation method. To calculate the LPCs I am using the Levinson–Durbin recursion. In my literature the error is initialized with the first ...
1
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0answers
33 views

What is actually transmitted following LPC of a speech frame?

For each frame, what's sent over to the receiver for decoding? The coefficients , pitch in some bits, voiced/unvoiced classification in another bit? Another broad question to develop intuition about ...
0
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1answer
51 views

Improving the separation of a signal into source and filter

I am implementing a voice morphing system, but I am having difficulties getting a good quality output signal. The method I am using is LPC analysis and synthesis. In theory, the LPC process should ...
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1answer
37 views

LPC produces unexpected residual

I have written a vocal pitch shifting algorithm which uses LPC to separate the signal into its spectral envelope (predicted by the coefficients) and the pitch information (the residual error). My ...
0
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1answer
67 views

Preprocessing signal before LPC

I have a signal that contains the speaking of three vowels. The signal is contaminated with dc offset and an interference at 60 Hz. I want to perform LPC for the synthesis of the spoken vowels. Do I ...
0
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1answer
123 views

autocorrelation A to K conversion for LPC speech analysis?

I am building an LPC analysis tool for speech synthesis and did the following to generate my a0 through a10: ...
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2answers
76 views

pitch extraction for speech

I am building an LPC analysis tool, and am at the point of needing to do pitch period analysis. I was initially interested in using the Gold & Rabiner algorithm for this, and got a hold of a ...
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2answers
124 views

Separating excitation from filtering for sound sythesis

From my days at college I rememeber that LPC splits a signal into a series of slowly changing filter coefficents and an audio-rate residual error signal, such that the original signal gets reproduced ...
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0answers
27 views

peak-to-peak test between two signal

Suppose that we have different signals (Pulses). I would like to study which signal has deterministic peak-to-peak distant (lag). For example A=[1 0 0 1 0 0 0 1 0 0 1] and B=[1 0 0 1 0 0 1 0 0 1] and ...
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0answers
103 views

Definition of LPCC

would you please tell me what does LPCC exactly do?How can we calculate the coefficients of LPCC? I need to know clearly what is it so i can implement it. I dont know if i am asking this question ...
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0answers
122 views

Getting LPC coefficient by HTK

How can i get lpc coefficient by htk? I know that there is a binary code "HCopy" which is ganna help with that... but my question is how can i read a wav file in htk? and i guess i need activeperl to ...
3
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2answers
635 views

Gentle request for explanation on LPC and LPCC coefficients :)

If I understand what LPC does, I think. It predicts the next sample by taking into account previous $p$ samples. I don't understand why it is useful in DPS and speech recognition. I also came across ...
3
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0answers
208 views

Remove the extra peaks by lag

Suppose that we have some peaks of a signal and we know the time lag between dominant peaks. How is it possible to remove the extra peaks by applying time lag ? Lets say it in MATLAB ...
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2answers
651 views

What is the “pitch marker” in the LP-PSOLA algorithm?

The LP-PSOLAR algorithm uses a the Linear Prediciton Coding (LPC) to calculate an error vector from a signal. This error vector is used to calculate the pitch markers. What do these pitch markers ...
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1answer
325 views

Derivation of Yule-Walker Equation for LPC

I have derived the Yule-Walker equation as shown below. A few things confuse my mind. So I have 4 questions: 1) Is this derivation true? 2) I am not sure why we do the partial derivation in terms of ...
0
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1answer
97 views

Format location from LPC magnitude

I am confusing when I find the lpc roots magnitude, f1=0.9313, f2=0.9308, f3=0.91 and f4=0.95 but when I look at LPC envelope the f1 is higher than f4 in term of magnitude in dB. Could anybody explain ...
0
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1answer
276 views

Remove spurious peaks of Hilbert transform

I want to eliminate spurious peaks of Hilbert transform for finding Glottal closure in LP residual. I have the following 4 steps: 1-down-sample. 2-Hilbert Transform. 3-Identify Peaks in Hilbert ...
1
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0answers
443 views

DFT, cepstrum, LPC for feature extraction

I am a newbie in speech processing and experimenting to get a feel. I have extracted some speech segments using a window function and I want to find distance between a pair of segments. First, I took ...
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2answers
468 views

Matching an LPC Magnitude Spectrum to FFT Magnitude Spectrum

I'm trying to get an LPC magnitude spectrum to match to an FFT magnitude spectrum. Basically I want the peak height in the LPC Spectrum to match the peak height in the FFT Spectrum. Thanks to ...