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Discussion Groups | Speech Coding
Technical discussions related to Speech Coding (all itu and other vocoders, ACELP, CELP, AMR, etc)
Search Results for "723"
Quantization performance of LSFs in G.723.1
koro - May 5 2004
Hi everyone:
I am working on the quantization of LSFs in G.723.1.
I found that sometimes G.723.1 introduces a quite large
percentage of outliers in the range of 2... 
Difference among G.723, 729, 726 [2 Articles]
Ramya Desai - May 9 2005
Dear Experts,
I am new to this group and speech coding (But not to
DSP)
I want to know the details of G.723. But from ITU web
site its not available and it recomen... G.723.1 Annex B
- Nov 15 2001
Hi,everyone:
I'm writing a program about G.723.1,but now I cann't intergret
G.723.1 Annex B in my program.Who can tell me how to add Annex B code
into my program?... Re: G.723.1 Optimization [2 Articles]
Hemant - Mar 14 2003
Hi List,
I have been involved with G.723.1 for quite some time. Right now, my
implementation which is compatible with ITU G.723.1 is working fine. I want to
furth... Is there any fast fcb search algorithm for G.723.1
lily_yangzhou - Jul 28 2002
Dear All,
I'm now doing a transcoder between the G.723.1 and Gsm AMR. as we all
now the fixed codebook search algorithm in the reference G.723.1 cost
much MIPS... qurey about G.723.1 bit stream file...help me please
jays_21_13 - Jun 14 2008
hi to all,
I was working on G.729 till now.
but now i have started my work on g.723.1. I have some query about bit
stream file generated by g.723.1 encoder.
this bit stream fi... Harmonic noise shaping of G.723.1
lyf219 - Aug 12 2002
I do not understand the Harmonic noise shaping in G.723.1.Can someone
send me some documents on it?
Besides can someone send me the code that is fixed point
im... Bandwidth expansion in G.723 and G.729 [2 Articles]
Cool Dsp - Jun 11 2003
Hello,
I am new to Speech Coding. I was reading through the ITU-T specs for G.723 and
G.729. Can anyone enlighten me on the following aspects:
The import... G.723.1 Test Vectors
jameel2510 - Sep 12 2002
hi everybody
we are working on the implementation of G.723.1
we require testVectors for G.723.1 to test the code
if someone have these vectors pls send those to m... G.723.1 VOIP
M.R.Saraj - Feb 21 2002
Hello,
While I was integrating the G.723.1 in a voip application, recent
draft of IETF indicates that the payload format for G.723.1 is 20/24
bytes and nowhere... G.729D for VoIP appl.
Andi Mardiansyah - Jun 2 2002
Hi all
The G.723.1 and G.729/A are usually used in VoIP
application, many gateway product use those algrtm.
Anyone know why G.729D is rarely / not used for ... Need help on G.723.1! [3 Articles]
St.Forest - Mar 11 2003
Hi all:
nice to meet you here.
recently I test the ITU-T G.723.1 reference fixed point code. It
works poorly. Even with the gcc option -O3 turned on, the coding o... g.723 decode
ahwh66 - Feb 27 2005
hi all,
when decoding g.723 frame, what does the parameter "crc" mean?
thanks,
... Need optimum adaptive codebook gains in G.723.1
koro - Apr 8 2004
Dear all!
I am fresh in speech coding, and now I use the G.723.1 to
compress our TTS database.
I want to retrain the two gain tables used in the adaptive
codebo... G.723.1 and loss concealment
setumi71 - Apr 19 2004
Hi,
I am trying to build a new mechanism of loss concealment for the
codec G.723.1.
I've reconstructed the lost frames.
These lost frames are calculated with Ma... LSF in g.723.1 [2 Articles]
milamine - Sep 4 2003
hi all
i'm working on quantizing the LSF
can i use the LSF generated by the VOCODER g.723.1? and if so how can
i get them.
Thx a lot.
... questions about G.723.1 and G.729 [3 Articles]
Yidan Zhou - Dec 9 2002
Hello all,
After I went through the standard document of G.723.1 and G.729,
there are several technical terms I don't understand.
1. In G.723.1, what is the combi... LSP in g.723.1 floating point
milamine - Aug 24 2003
hi all
i'm working on PLC with th g.723.1 vocoder
when checking out the LSP frequencies i came up with some strange
frquencies knowing that 0 <= LSP <= pi !!! ... 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... Where can I find a comparison list of perfrmance and complexity of codecs?
Yidan Zhou - Nov 13 2002
Hello all,
Anyone here know where I can find a comparsion of performance and
complexity for G.721, G.723, G726, G.723.1, G.729 and RPE-LTP(GSM)?
Thanks in adva... Problem in Bitrate_G.723.1
rakesh chaudry - Apr 15 2004
Hi all ,
I am working in G.723.1 Dual rate Codec
I have a query
Is it possible to change bit rate from Frame to Frame ?
or it depends up on the user ... .wav input to g.723
learningdsp - May 27 2004
Hello,
I am a beginner and trying to understand the working of G.723 ADPCM.
I have been able to get all the C files from ITU for the G.723 ADPCM.
I have a b... MIPS rating of G.723.1 [3 Articles]
Sameer Kibey - Mar 22 2002
Hi all!
i was wondering if anyone can explain the significance
of "MIPS rating" of G.723.1 (or, for that matter any
other recommendation like G.729).also how d... What's the meaning of the binomial coefficients in G.723.1 LPC analysis? [2 Articles]
Yidan Zhou - Oct 27 2002
Hi all,
Now I am reading the standard documents and reference source code
of G.723.1. There is an extra windowing multiplication in between the
Levinson-Durbin re... 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... Sample g.723.1 ".wav" file [2 Articles]
shaofeng_li - Jul 1 2003
Hi all,
I'm looking for a sample g.723.1 ".wav" file for test purpose. Does
anyone have this?
Thanks, hoping for your responses.
Shaofeng
... MP-MLQ [4 Articles]
prajesh_etc - Sep 16 2003
Hi everyone,
I am working on ITU Standard G.723.1, ie. speech coder(Hybrid
coder)i have started the project one month back. I have almost
designed the h/w for it.... Test vectors for MELP and G.723 vocoders
Khubaib - Nov 30 2004
Dear all !
I want to have any standard or GOOD test vectors for voice coders
like MELP and G.723.1. Where can i find them.?. Is there a way for
noise analys... problems in G 723.1
shanky_b_2001 - May 5 2002
Hi all,
I am facing few problems while debugging the Standard C code of
G 723.1 for TI processors.
Problems:
1) Even after disabling the High pass filter... Re: Digest Number 250
- Mar 12 2003
Hi,
I don't think any optimised version of G.723.1 is available. In G.723.1 vocoder,
There are search algorithms which involves 5 levels of nested Loops becau... 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... need help regarding bit stream file generated by G.723.1
jayeshkumar makwana - Jun 17 2008
hi to all,
=C2=20
I am currently working on G.723.1.
I have ITU-T implementation of G.723.1.
here G.723.1 encoder takes .tin as an input and gives .rco as an output. it=
mean... G.723.1, the parameters
setumi71 - Jan 18 2004
Hi,
I am studying the codec G.723.1 (ITU-T Recommendation).
I would like to know the precise meaning of the following
parameters:
adaptive code book lags (AcLg ... g.723.1 [2 Articles]
simha j - Sep 6 2001
Hello all,
I am using ITU-T G.723.1 C reference code.
when I execute the c code it asks for input-output
file name. Here, the input files(Test vectors) ... Some sentence in Find_Best() of G.723.1 [3 Articles]
St.Forest - Apr 7 2003
dear all:
In the Find_best() function of G.723.1 reference code, there is a
sentence (line 527 of EXC2.C or Line 655 of EXC_LBC.C) I don't
understand:
/* ... 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... c-code G.723.1 - to find the parameters
setumi71 - Dec 26 2003
Hi,
I have downloaded c-code for the codec G.723.1 (fixed point).
I don't absolutely succeed in finding in the code the variables
related to the LSP parameters, g... the parameters of G.723.1
setumi71 - Jan 15 2004
Hi,
I have downloaded c-code for the codec G.723.1.
The parameters of subframes:
/*subframe coded parameters */
typedef struct {
Word16 AcLg ; /* adaptive ... Re: PLC for g723.1 vocoder
bada...@yahoo.com - Jul 27 2005
You can go for ITU-T G.723.1 (11/96), and Annexxe A from 3gpp.org
Thanks
... Help needed: Documentation and test vectors for G.711,G.726,G.729,G.723.1
nasound - Jan 22 2002
Hi,
I need to implement G.711,G.726,G.729,G.723.1.
But the documentations and test software/vectors
all add up to pretty much $$$money.
I'll like to know whe...