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Discussion Groups
Discussion Groups | Speech Coding
Technical discussions related to Speech Coding (all itu and other vocoders, ACELP, CELP, AMR, etc)
Search Results for "pitch"
pitch determination [3 Articles]
kobi...@yahoo.com - Jan 9 2008
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... 
Pitch detected in multiple of fundamental frequency [2 Articles]
debabrata pal - May 28 2007
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 usin... Pitch problems [3 Articles]
viper4295 - Mar 6 2005
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... How to decode the pitch predictor contribute in G.723.1?
Yidan Zhou - Oct 11 2002
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... pitch detector for glottal period
subdene - Nov 23 2004
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... Pitch and Duration Modification Algorithms
Parag Botre - Jan 28 2004
Hi,
I am searching for Pitch changing without duration modification algorithm
and also for Duration modification without pitch change algorithm. If
anybody has... [Fwd: VoiceUnvoice Decision&Pitch detemination]
Jeff Brower - Oct 10 2002
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
... Any other parameter ??
Swanand Deshpande - Mar 9 2005
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 b... Transcoder between G.729 & AMR & G.723.1
gray_1024 - Mar 28 2003
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 20... LPC & VELP SNR + VELP synthesizer
phitenk - Aug 4 2008
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... RE: What's the meaning of the binomial coefficients in G.723.1 LP C analysis?
- Mar 28 2003
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... harmonic noise shaping filter
ashwin_c29 - Aug 2 2008
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 an... Determining sound intensity from G.729 parameters [8 Articles]
furiousgame - Nov 24 2002
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 o... General queries in G.723.1
Sameer Kibey - Jun 14 2002
Hello everyone!
Here are a few queries wrt G.723.1:
1.The G.723.1 recommendation specifies a total
algoritmic delay of 37.5 ms.Out of this 30 ms
is due to... G.729a Tone Detection
James - Oct 16 2002
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 a... pitch predictor in celp [5 Articles]
tunkeat - Feb 21 2005
hi all,
i am puzzled about the use of long-time predictor in celp.
i see in some implementations, there is a long-time predictor (ltp)
but in others, eg fs-... transmitting phase spectrum in MELP? [3 Articles]
Ilya Druker - Jun 29 2005
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 ... LPC Pitch Detection Help Required
mgencarellli - Oct 17 2002
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 thi... MBE
- Jun 20 2002
Hello,
I am looking for information about phase distribution in my vocoder
(Matlab model of some kind of MBE vocoder, but some parameters are
detected by Analyse-... Need info about the MELP bitstream format..? [3 Articles]
Khubaib - Feb 24 2004
Dear membes
I need to know the bitstream format of the MELP's 54 bit frame.?. I
know what are the different bits (the number of bits for different
parameters) in ... Re: speech coding with DFT?
Vesa Ruoppila - Oct 12 1999
Hello,
There are several methods particularly for low bit rate
speech coding which utilize the DFT. For example, in waveform
interpolation coding the DFT is... Re: Low Bit Rate Coding
- Nov 16 1999
Dear Musafi,
I was checking the references I have on the MELP, and I found two
articles, which I have forgotten about, that maybe useful for your work:
[1] ... Reconstructing Speech
kobby70 - Jan 9 2008
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.
... Re: [Fwd: ask help]
Jeff Brower - Feb 11 2004
Sara Lyme-
> i like to know what is the characteristic of the input signal that
> i will used in melp program (format ,frequency ,bit,mono )and i
> know that m... Classifiers
Swanand Deshpande - Mar 27 2005
Hi,
I am undertaking the task of Age categorization on the basis of
speech. For that I am looking for different classifiers I might find useful.
I was hoping if anyb... Re: MELP Algorithm IP
1010...@163.com - Mar 7 2007
>
>
>
> Phil-
>
> > I tracked this down a few years ago....
> >
> > The MELP patents were sold to ASPI, which was purchased by Polycom. You must
... Query in Adaptive Codebook Search [Why resolution 1/3?]
Pradeep Srinivasan - May 2 2002
Hi All,
My question in G.729B,
Why are we taking a fractional pitch delay T1 used
with a resolution of 1/3 in the range [58/3, 254/3]
for the 1st subframe... adaptive codebook - 3gpp 26.190
Mathew John - Feb 14 2002
hi,
anyone knowing the references/publications which
describes the fractional pitch lag calculations
described in the 3g 26.190 standard. (section 5.7).
I... G729A CODEC application.
raghu kisore - Dec 21 2001
hi,
Description of the problem:
-----------------------
i have got the ITU standatrd G.729A CODEC application
written in c.along with the code i have got a t... pich estimation
MANISH GUPTA - Feb 20 2004
hi
can i have some robust algorithm for estimating the
pitch period of speech signals
=====
Thanks & Regards
*******************************************... waveform interpolation [3 Articles]
dr_simic - Sep 30 2003
I'm trying to implement WI codec,for now just layer I(without quantisation),as
it is described in Eddie Choy's thesis,but I don't get perfectly sounding
decoded spe... cepstrum vocoder
jefcg - Sep 18 2005
Does anyone know of a vocoder "standard" that implements the cepstrum,
or mlsa (mel log spectral approx).
If a standard exist, should it use the cepstrum for complete so... RE: Harmonic Noise shaping Filter [4 Articles]
Sameer Kibey - Aug 12 2003
hi all!
The Harmonic noise shaping filter and the formant perceptual weighting
filter are both based on the same principle - they try to minimise the noise
in ... Re: waveform interpolation coder with accurate reconstruction
Ilya Druker - Sep 23 2003
Hi,
Unlike the speech coders from the CELP-family WI is a parametric
coder. The more bits you "invest" in CELP-like coder the higher
accuracy of the waveform r... Problem about LPC-10 and LPC10e
ytjiang2002 - Sep 7 2004
Dear all,
I'm involved in a project of speech coding of LPC10. And I downloaded
the source of LPC10e, and found it's complex. Especially the pitch
tracking, vo... Age estmation
Swanand Deshpande - Mar 10 2005
Hi,
I am currently handling this project of age estimation on the basis
of speech. It would be great help if anyone can pass me info on how to
estimate age ... Needed help on generating a periodic spectrum
vijay kura - Feb 2 2003
Hello my friends and scholors
As for i know that one method of generating periodic spectrum "|p(w)
|" is to take the Founrier transform magnitude of a windowe... Re: CELP - analysed and synthesized filter
dunjie17 - Jan 28 2005
hi,
sorry, I meant the pitch detector filter
rgds,
tk
--- In , "dunjie17" Any Good books on Speech Coding
- Mar 24 2001
Dear All,
I have gone through the postings and found this site interesting. Are
there any good books that cover recent developments in speech coding
any tutori... difference between the CDMA and GSM and ITU-T Vocoders
Lingadevaru - Apr 22 2003
Hi all,
If any one knows the difference b/n CDMA, GSM and ITU-T vocoders, please
give your valuable inputs.
Why can't we use GSM vocoders itself in CDMA and vise ...