pitch determination

Started by kobi...@yahoo.com in Speech Coding12 years ago 2 replies

hello all i am working on speaker identification.I want to calculate the pitch of a speech signal.Can you help me is there any function available...

hello all i am working on speaker identification.I want to calculate the pitch of a speech signal.Can you help me is there any function available for pitch detection or dection of voiced & unvoiced part in a signal using MATLAB?


How to divide speech signal into pitch-synchronous frames?

Started by jayachamaree in Speech Coding9 years ago

Hello, I need to know how to get pitch-synchronous speech frames from a speech signal i.e. speech signal is divided into overlapping frames...

Hello, I need to know how to get pitch-synchronous speech frames from a speech signal i.e. speech signal is divided into overlapping frames where each frame is two pitch periods long and centered around the current pitch mark. Can anyone give me an idea how to implement this (using Matlab)? Thanks.


How to decode the pitch predictor contribute in G.723.1?

Started by Yidan Zhou in Speech Coding17 years ago

Hi, I am reading the ITU standard document of the speech coder G.723.1. In Section 2.18 Decoding of the pitch information, it...

Hi, I am reading the ITU standard document of the speech coder G.723.1. In Section 2.18 Decoding of the pitch information, it mentions that to calculate the pitch contribution, we need e(n). But it does not mention where the variable e(n) comes from. If anyone knows the clue to


Pitch detected in multiple of fundamental frequency

Started by debabrata pal in Speech Coding12 years ago 1 reply

Hei guys, How to tackle this problem of pitch detection where I get the pitch Period detected 22 or 44 or 66 samples but in reality it was always...

Hei guys, How to tackle this problem of pitch detection where I get the pitch Period detected 22 or 44 or 66 samples but in reality it was always a period of 22 samples. I am using AMDF , does center clipping will help? Regards, D.Pal


Pitch and Duration Modification Algorithms

Started by Parag Botre in Speech Coding16 years ago

Hi, I am searching for Pitch changing without duration modification algorithm and also for Duration modification without pitch...

Hi, I am searching for Pitch changing without duration modification algorithm and also for Duration modification without pitch change algorithm. If anybody has source code for the above mentioned requirements in Time and/or Freq domains, it will be really great. T


about fractional pitch search of melp

Started by tms3...@yahoo.com.cn in Speech Coding11 years ago

hi all I'm learning MELP source code.I am not able to understand the fractional pitch search algorithm in function Shortword...

hi all I'm learning MELP source code.I am not able to understand the fractional pitch search algorithm in function Shortword frac_pch(Shortword sig_in[],Shortword *pcorr,Shortword fpitch, Shortword range,Shortword pmin,Shortword pmax, Shortword pmin_q7,Shortword pmax_q7,Shortword lmin); somebody can give me some hints about determining fractional pitch in Bandpass voicing analy...


Any other parameter ??

Started by Swanand Deshpande in Speech Coding15 years ago

Hi, I was searching for any other parameter used other than Pitch that is used to extract information about the user. For my...

Hi, I was searching for any other parameter used other than Pitch that is used to extract information about the user. For my task of categorization on the basis of ages from speech, use of pitch does not seem to work as it does not give any distinct thresholds for ages.


G.729a Tone Detection

Started by James in Speech Coding17 years ago

I'm trying to detect answering machine tones.... so I don't care about the pitch... just that the pitch remains near constant for...

I'm trying to detect answering machine tones.... so I don't care about the pitch... just that the pitch remains near constant for some duration. Are there any shortcuts to avoid full decode and still get things like dominant frequency / excitation level for a sample? Or


LPC Pitch Detection Help Required

Started by mgencarellli in Speech Coding17 years ago

I am currently developing code using c6x DSK for determination of pitch parameters for a simple LPC using the Sondhi center clipping...

I am currently developing code using c6x DSK for determination of pitch parameters for a simple LPC using the Sondhi center clipping approach. According to this method, the speech data is first filtered at 900 Hz before it is clipped. What I want to know is : 1. I


Pitch problems

Started by viper4295 in Speech Coding15 years ago 2 replies

Hi, I am currently doing this project of Classification and categorisation on the basis of speech. I have to sort the...

Hi, I am currently doing this project of Classification and categorisation on the basis of speech. I have to sort the samples into male or female and into age categories on the basis of the speech samples. For this i have used pitch as a fetaure and on this i


pitch detector for glottal period

Started by subdene in Speech Coding15 years ago

Hello, I have been trying to write a pitch detector within C++ for voiced speech. I currently get the sample speech,...

Hello, I have been trying to write a pitch detector within C++ for voiced speech. I currently get the sample speech, apply centre clipping for the entire speech data, and then calculate all the peaks. However, I am not sure whether I need to split the data into f


[Fwd: VoiceUnvoice Decision&Pitch detemination]

Started by Jeff Brower in Speech Coding17 years ago

Ravichandra- I think you meant to post this to the speech coding group. I went ahead and posted for you. Jeff Brower ...

Ravichandra- I think you meant to post this to the speech coding group. I went ahead and posted for you. Jeff Brower DSP sw/hw engineer Signalogic -------- Original Message -------- Subject: VoiceUnvoice Decision&Pitch detemination


LPC & VELP SNR + VELP synthesizer

Started by phitenk in Speech Coding11 years ago

Hi, i need snr comparision of lpc-10 and voice-excited LPC (VELP) to show that velp is better as compared to lpc. and why in velp...

Hi, i need snr comparision of lpc-10 and voice-excited LPC (VELP) to show that velp is better as compared to lpc. and why in velp synthesizer, we must use DCT+noise and don't use pitch computation? by computing the pitch so we can determine whether the input speech frame is voiced or unvoiced, if we don't use pitch in synthesizer, is DCT can determine input speech voiced or unvoiced?! c...


RE: What's the meaning of the binomial coefficients in G.723.1 LP C analysis?

Started by Anonymous in Speech Coding16 years ago

The smooth is for LPC coefficients calculation. When G.723.1 calculates the pitch by open-loop or close-loop pitch predictor, it...

The smooth is for LPC coefficients calculation. When G.723.1 calculates the pitch by open-loop or close-loop pitch predictor, it uses the the original signal source not the smoothed one. //Yidan -----Original Message----- From: gray_1024 [mailto:] Sent: Friday, Mar


harmonic noise shaping filter

Started by ashwin_c29 in Speech Coding11 years ago

Hi All, I was wondering as to how the harmonic noise shaping filter improves the performance of the G.723.1 codec. Does it like improve the...

Hi All, I was wondering as to how the harmonic noise shaping filter improves the performance of the G.723.1 codec. Does it like improve the pitch harmonic structure as well and if so are the improvements restricted to a specific set of pitch harmonics? Moreover why does this filter have a transfer function which is the inverse of the long term prediction filter? I would be really grateful ...


transmitting phase spectrum in MELP?

Started by Ilya Druker in Speech Coding14 years ago 2 replies

Ladies & Gentlemen I encountered the problem of transmission of music by MELP codec. MELP is intended for coding human speech, so it is...

Ladies & Gentlemen I encountered the problem of transmission of music by MELP codec. MELP is intended for coding human speech, so it is not surprising that the quality of the music synthesized by MELP is very low. One of the problems is failure of the pitch detector to recognize pitch-doubling/tripling in music. I think that transmission of phase


Determining sound intensity from G.729 parameters

Started by furiousgame in Speech Coding17 years ago 8 replies

Using only the G.729 parameters (codebook values, codebook indices, pitch periods, and pitch and codebook gains) or the line...

Using only the G.729 parameters (codebook values, codebook indices, pitch periods, and pitch and codebook gains) or the line spectral pairs, how can the intensity of a sound be determined?


ITUT G729 preprocessing question

Started by hyee...@yahoo.com.cn in Speech Coding10 years ago 1 reply

About ITUT G729, I have two questions. 1. In the processing section of G729 spec, it says to apply a high pass filter with a cut-off frequency...

About ITUT G729, I have two questions. 1. In the processing section of G729 spec, it says to apply a high pass filter with a cut-off frequency of 140 Hz. As we know, the range of pitch is between 55 and 400 Hz. Then, how to search the pitch with frequency below 140Hz with such a preprocessing algo? It is as fetching the moon from sea. 2. G729 preprocessing section uses a second order pole/ze...


Transcoder between G.729 & AMR & G.723.1

Started by gray_1024 in Speech Coding16 years ago

I'm now doing a transcoder between G.729 & G.723.1. Considering the conversion of pitch delay, since G.723.1 encodes speech...

I'm now doing a transcoder between G.729 & G.723.1. Considering the conversion of pitch delay, since G.723.1 encodes speech with 30ms frames, while G.729 with 20ms frames, how can i do? I attempt to convert the pitch delay using linear interpolation, but the perform


Reconstructing Speech

Started by kobby70 in Speech Coding12 years ago

I am new to Signal Processing. How do I reconstruct the speech (synthesized), after determining the Pitch, the LPC coefficients, and the Gain?...

I am new to Signal Processing. How do I reconstruct the speech (synthesized), after determining the Pitch, the LPC coefficients, and the Gain? Thanks in advance.