Sign in
Search speechcoding
Subscribe to speechcoding
speechcoding by Keywords
ACELP | ADPCM | AMBE | AMR | AMR-NB | CELP | Codebook | DTMF | G.723 | G.726 | G.729 | GSM | Interpolation | LPC | LSF | LSP | MELP | PCM | Perceptual | Pitch | PSOL | QCELP | Quantization | SMV | VAD | Vocoder
Ads
Discussion Groups
Discussion Groups | Speech Coding
Technical discussions related to Speech Coding (all itu and other vocoders, ACELP, CELP, AMR, etc)
regarding adaptive c/b in AMR encoder [2 Articles]
Sameer Kibey - May 19 2003
hi all
in the AMR standard, a signal called y[n] is used. it is the "filtered adaptive
codebook vector" and is defined as:
y[n] = v[n]*h[n] (read convolution o... 
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... line spectral frequencies
auliasn - Apr 28 2003
dear all
i have some difficulties with some algorithms.
could anyone explain to me about the LPC and LSF (line spectral
frequencies) algorithms that are being ... 4 channel PR filter bank
vijay venkatesh - Apr 26 2003
Hi ,
I am simulating a 4 channel tree structured
perfect reconstruction filter bank in Matlab.
Could anybody tell me how the transfer function
analysis and s... why different standards for GSM FR
skakkeri2002 - Apr 23 2003
Hi All
Can any body give reasons (apart from homing sequence)for having
different ETSI standards such as Phase2, phase 2plus, 3GPP for same
GSM FR. The implementa... 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 ... Problem deciding Q format
Arvind - Apr 17 2003
Hello All:
I am converting floating point code to fixed point of Qcelp13 coder.
I need to compute the autocorrelation of a temporary vector and then
multipl... 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:
/* ... Similarity of GSM-FR /HR with GSM-AMR
biswasbiswajit - Apr 3 2003
Hi All,
I want to know if compatibility can be provided for GSM-AMR codec
along with GSM-FR and GSM-HR codec.
DO I have to develop the HR and FR seperately?... 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...