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Technical discussions related to Speech Coding (all itu and other vocoders, ACELP, CELP, AMR, etc)
Search Results for "adpcm"
ADPCM decoder required [3 Articles]
Sanjam - Nov 2 2006
Hi all.
I am recording voice using ML2390 codec. It records speech in the ADPCM
format. Now I wish to listen to the recorded data to validate whatever
I have recorded. I need an... 
IMA ADPCM
Raghavendra C V - Feb 7 2007
Hello Experts,
My new project requires me to work on IMA ADPCM codec.
I did a bit googling but found a precious little. I have a few questions.
1. I understand IMA no longe... What is OKI ADPCM
Mayank Kumar - Mar 14 2003
Hi All,
Does Somebody have any information about what is OKI ADPCM and how is it
different from normal ADPCM.
As well as any information about the source co... [ PCM -ADPCM conversion & vice versa ]
Dhiraviam Natarajan - Oct 9 2003
Hi All,
I'm abt to implement ADPCM decoding/encoding in ADSP 2191.With a minimum
background in Communication Systems, I find it difficult to understand the ADPCM... [ TONE Generation ] PCM - ADPCM
Dhiraviam Natarajan - Sep 13 2003
Hi ppl,
I working on tone generation for an Access Network ( of a telephone exchange ).
Can some one throw light on PCM to ADPCM conversion algorithm , point ... Number of ADPCM channels in E1 ??
saha...@yahoo.com - Aug 25 2005
Hi fellow
Im new comer . could anyone please help me out .
1 . how many channels are transmitted if we have compressed the voice channels in E1 with ADPCM with 40kbps, 32... Re: Speech Coding Algorithm applied in 8-bit controller
- Nov 8 2001
If you're targetting an 8 bit micro, I should stick to uLaw, A-Law and simple
forms of ADPCM. They all code up well - but just about everything else uses
large q... [speech codec help] search for IMA/DVI ADPCM 8:1 unstandard compressed format
wang keven - Oct 21 2004
Dear all:
I am looking for the unstandard compressed format 8:1 of IMA/DVI
ADPCM. I find it can be excuted in the software cooledit. But I never see
the arithm... ADPCM G.726
Mahesh Subedar - Aug 3 2001
Hello,
I am implementing ADPCM G.726 standard. I have a doubt in that. what value
of estimated output we have to take at the start of the compression.So, if
anybo... G726 on TMS320C62xx [2 Articles]
- Feb 2 2001
Hello All:
I am working on ADPCM G.726 Coder for dual channel.
After completeing coding and testing sucessfully , MIPS(MCPS)
performance is found to be around ... Identifying an ADPCM encoded file format [3 Articles]
braz...@easymail.hu - Mar 21 2007
I have just bought an voice recorder (Speed-Link PDR-3) but it contains just a windows converter to transform its own recorded voice files into wav/mp3 formats. I would like to use... ADPCM encoder/decoder [2 Articles]
vipul paladiya - Nov 1 2001
Hi champs,
I am working on ADPCM encoder and decoder. I have got the C code of G.726 from
the net. This is for all the 16,24,32,40 kbps. I have purchased the sta... ADPCM ITU C code
Meenakshi Matai - Jun 14 2004
Hello,
I am working on implementing the G.726 ADPCM algorithm.
In the C code obtained from ITU, there's a function called "update". It
is present in the "g7... G.721vsG.729 [2 Articles]
Prateek Shrivastava - Mar 23 2003
Hi guys,
I am doing a project, comparing ADPCM & CELP.
For this i have chosen G.721 for ADPCM & G.729 standard for CELP.
In these,
1)What are the parameters tha... Re: g.726 test vectors problem [2 Articles]
Satheesh Ram - Dec 9 2005
Hey,
1 - the reference test vectors given along with G726 also in hex
format, Did you convert all your reference test vectors to binaries?
2- load, lolo, adlo are th... MOS Score - G.726 ADPCM & G.729 CS-ACELP - Voice Quality issues?
raju...@ngc.com - Jan 22 2009
Hi DSP Related members,
I am researching to find out information on the voice quality of codecs used for VoIP communication using networking routers, switches and access devices... .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... IMA ADPCM [2 Articles]
dunjie17 - Jan 19 2005
hi,
does anyone know how do they come up with the
quantisation values in the table?
rgds,
tk
... Reg G726 test vector verification
Aditi Akula - Dec 9 2009
Hi everyone,
I am working on G726. I have the source code in C (from Sun Microsystems).
I am trying to test the algorithm using the ITU test vectors.
I have converted the NR... RE: G.723 Implementation to Jeff Brower
Arin George - Jan 9 2002
Marcos-
If you need the reference implementation of G.723, you may go to www.itu.int
and for free (the first three recommendations are still free upon registerin... Need help... [2 Articles]
- Apr 4 2001
Hi all...
Can anyone help me?
I'm interested in ITU-T recommendation G.722.1(not SB-ADPCM) using MLT
(Modulated Lapped Transform)...
But I can't find materials ... speech coding at 11025 Hz
sara_grassi - Jan 13 2003
Hello,
There exist public domain implementation of speech coders at 11025 Hz?
(preferably ADPCM)?
Thanks and best regards,
Sara
... re:difference B/W g723,g729,g726
chetan k - May 11 2005
Hi,
G723 & G729 are CELP based codecs, but G726 is ADPCM
based codec. The basic difference is the method for
coding used, Data rate supported and application for
which i... Speech Coding Algotirhm applied in 8-bit controller
Ken Chan - Nov 7 2001
Hi,
I am looking for speech coding algorithm, like ADPCM, ASPCM, CELP
which can be applied most popular 8-bit controller without any patents
and which are open... Regarding implementation!!!
madhusudhan surya - Dec 23 2001
hi ,
Presently i am doing a project "Development of
Generic Architecture for CELP algorithms"
My questions???
-------------
why most of the speech codin... Re: Speech compression in dictation machines
- Nov 21 2001
Assuming you've had no luck with the obvious approaches (web searches for "dss
codec", looking for linux drivers etc), I think your first line of attack should
b... Re: Aysemetric Speech Encoding
MAK - Sep 14 2008
Hi, seandunlevy.
> I'm looking into a low bit-rate speech compression route that I can
> decompress using an ARM7 TDMI running at 33MHz. There will be no real-
> time encodi... COM XVIII/92 102
jan_trmal - Apr 28 2003
Hi all,
I'm looking for specs of this standard. It's mentioned in the G.726 Annex III,
with two
citations -- US-patent nr. 4860313 and then with the following ann... Re: G726 Header [2 Articles]
Jeff Brower - Jul 5 2004
Harsha-
> U mean to say ITU test vectors will be having headders. I have to read that
and
> confirm which rate it is?? right..
> But,I did not found headder ... Re: FW: Can Huffmann coding be directly applied to speech samples ?
Shree Jaisimha - Feb 4 2004
Hi All
To add on more to this topic, speech exhibits a Laplacian PDF function.
Laplacian tends to be a squeezed in version of the general guassian functi... Re: Can Huffmann coding be directly applied to speech samples ?
Shree Jaisimha - Feb 4 2004
Dear All
One more point to add on to this is regarding the concept of lossy and lossless
data compression techniques.
Although lossy techniques are branded ...