Adaptive Filter | ADPCM | ADSP | ADSP-2181 | Aliasing | AMR | Anti-Aliasing | ARMA | Autocorrelation | AutoCovariance | Beamforming | Bessel | Blackfin | Butterworth | C6713 | CCS | Chebyshev | CIC Filter | Circular Convolution | Code Composer Studio | Comb Filter | Compression | Convolution | Cross Correlation | DCT | Decimation | Deconvolution | Demodulation | DM642 | DSP Boards | DSP/BIOS | DTMF | Echo Cancellation | Equalization | Equalizer | ETSI | EZLITE (Ez-kit Lite) | FFT | FFTW | FIR Filter | Fixed Point | FSK | G.711 | G.723 | G.729 | Gaussian Noise | Goertzel | GPIO | Hilbert Transform | IFFT | IIR Filter | Interpolation | Invariance | JTAG | Kalman | Laplace Transform | Levinson | LPC | McBSP | MIPS | Modulation | MPEG | Multirate | Notch Filter | Nyquist | OFDM | Oversampling | Pink Noise | Pitch | PLL | Polyphase | QAM | QDMA | Quantization | Quantizer | Radar | Random Noise | Reed Solomon | Remez | Resampling | RTDX | Sampling | Sharc | TI C6711 | Undersampling | Viterbi | Wavelets | White Noise | Wiener Filter | Windowing | XDS510PP | Z Transform

ROM-based G.729 solution

We need to implement G.729 decoding/encoding in an embedded design for our Master Thesis . We would prefer a ROM-based solution for the G.729 part. We've been eyeing the Voicepump VP1xx-series which is ROM-based, however DSPG won't support our effort to use their products. Any ideas to other...

G.729 codec

I wonder if any have any idea about the ITU G.729 sample implementation sample code. when we use their decoder application, then generated PCM 16-bit file is almost the same size as the input bitstream g.729 file, and we know that this is a compressed format, is there a problem, or those samples...

Re: MIPS required for G.165,G.729AB

praveenkumar1979@rediffmail.com (praveen) wrote in message news: ... > Hello, > I wanted to know the MIPS required for G.165,G729AB,T.38 and V.150. > I am Choosing a DSP (Analog ot TI DSP) for a application which has the above tasks. > > Thanks and regards > Praveen ADSP-2181 for G...

G.729 with different sampling rates?

I'm trying to understand G.729. The only compression algorithm I've coded before is ADPCM, and it wasn't keyed to a certain sampling rate - that is, it would be just as happy with 8100 samples per second or 7900 samples per second as it would have been with 8000, just the quality would be slight...

audio transcoding

Hi all, I was wondering if anyone can give me some information (links, forums, possible books) on audio transcoding topic. I've been assigned this task and I need a starting point. I'm generally interested in audio transcoding but more specific in G.729.A or G.729.AB to G.723.1A transcoding....

voice codecs (g.729 & AMR)

Hello everybody, The G.729 reference C implementation contains saturation arithmetic... My question is whether an implementation without saturation could still be conforming to the standard? If it would still be standard conformal, what would posible effects be? Also would a 48bit impleme...

Audio codec for G.729/G.723.1/G.726/G.728

I found a website(http://www.imtelephone.com) that provide audio codec(G.729, G.723.1,G.726,G.728). It has a very simple interface and you can easily intergrate into your software. . ...

Re: Voice Activity Detection (VAD)

Steve Underwood writes: > They recently changed the VAD in G.729 to try to improve it. Where is G.729 used? VOIP? -- % Randy Yates % "I met someone who looks alot like you, %% Fuquay-Varina, NC % she does the things you do, %%% 919-577-9882 ...

CS-ACELP - G.729 Recomendation - Please Help

Hello. I am looking for aditional information about the CS-ACELP G.729 Codec. I have download the recomendation documentation from ITU-T web site, and that's a start. However, my knowleadge at digital telecommunications system is limited, and for that I am having trouble on figuring out how t...

G.729? was Re: Mystery voice codec: 10 millisecond blocks, 8 or 5.6 kilobits/second

nobodyhome@mailinator.com (Markus Wandel) wrote in message news: ... > I've just bought an RCA RP-5016A voice recorder. > ... > I've reverse engineered the file format enough to discover that in HQ > mode it consists of 80 bit blocks... > ... > Samples of me saying a few words in both m...

Re: Vector Quantization: Problem with designing codebook

> Keep trying :) > Take a look at the way the LSFs are quantized in G.723.1, G.729 or any > other standard codecs. > Hi Vladimir Thanks for the answer....I am re-inventing the wheel so I can learn :o) Can I download G723 and G729 for free somewhere or do I have to pay for it ? ...

Need some information on Voice codecs

Hello people Can any one tell me where I can buy G.723 and G.729 voice codecs? What would be the approx cost of those? Please give the links. Requirement is urgent. One more query Asumming that, one has a complete understanding of the CODEC, what could be the like...

vocoder transcoding question

hello, i am endeavoring to transcode G.729 r8 to G.711 as my first serious DSP project for a production environment. I am seeking any relevant resources including how-tos, reference docs, tutorials, working code, ..annnything I am fairly new to DSP and don't really have much of an idea of ho...

Frames solution ?? and complete audio silence file

Hi all !! ( FIRST OF ALL I AM THANKFULL TO JERRY, TIM, JOHAN, RANDY for clearing my doubts in the Floatiing and fixed point. Well i will like to know the algo which jerry talked about mutilpication (how it is done)). Now I want to share my understanding as I am Engineering student ...

Re: LPC cowfficient freeze

> > > pal.debabrata123 wrote: > > > In recent past there was a suggestion thrown to me to freeze the > > LPC > > coefficient to save computation cycles and the "rational" is speech > > is stationary in nature! > > > > The application is a vocoder. > >...

Re: gut feeling

Vladimir Vassilevsky wrote: > > > d.pal wrote: > > > Is it possible to implement 2 g729 encode+decode at 100 MHz MIPS32 core > > with SDRAM as ram? > > > > It looks possible however it may require a tough assembly coding. > I take this back. One encoder + decoder sh...

preprocessing

Hi all !!! I am new to this field. I want to know in detail/brief that why we need to preprocess the speech signal. As i was going through the G.729 annex B . In which it is written that if u take the input speech then u have to preprocess it before doing the manipulation/encoding it. So w...

Re: optimization (minimization)problem

"rajesh" wrote in message news:b1448f8a-51a2-4edf-bb09-416385ce3d9d@a12g2000pro.googlegroups.com... > hi, > I have been working on speech processing and came across > a minimization problem given below. > > One idea is to search throuh all possible combinations which is not ...

Re: hi

Jerry Avins wrote: > satish wrote: > > HI , i am satish doing my MS. I need c programming code for audio > > signal compression. The code should be compatible to run on TMS320c55x > > platform. The software used for this is "code composer studio". Can > > any help me out fr getting the cod...

Re: G729

hurry wrote: > I am interested in implementing a voice activity detector (VAD). I have > G729 code, to test its VAD performance, with me but not the document to > understand the method. The VADs used in GSM 6.10, G.723.1, G.729 and many other vocoder algorithms are nearly identical....

Re: What's difference between Active NC and Adaptive NC

Saraah wrote: > > And could anyone give me some suggestions on choosing algorithm > dealing with the 'stationary' noises whose amplitude and pitch change > slowly compared to the spectral variations characteristic of human > speech? > > Thanks, > Saraah Take a look at VAD al...

Re: gaussian white noise generation

Andor wrote: > Naebad wrote: > > > > > > can any one please suggest me how to generate guassian white noise with > > > zero mean and variance 1 in matlab? > > > > > > thanks. > > > > > > > > > > > If you have uniform distributed noise you can take say 12 samples ... > >...

Comfort Noise Generator

Dear Experts Well I've read a few previous posts on this aspect. The documents or references I used were: RTP Payload for Comfort Noise RFC3389. Appendix II of G.711 Annex B of G.729 Well my query is regarding implementation of a codec independent CNG: 1) Which excitation is best for ...

Re: Phonemes and FFT (or any other transform good for sound)

1. Gray and Markels seminal paper on lattice structures for audio which was written in 70s is a very good start point. 2. The IEEE Transactions on Acoustics, Speech and Signal processing esp. pre 1990 is the place where to get the most tractable mathematics of audio compression. 3. Anothe...

Re: Simple Problem

tanh wrote: > Can it be that both answers are correct? That is it can be either 0 > or PI, depending on how you look at it..? Both -1+j0 (PI degrees) and > 1+j0 (0 degrees) lies exactly midway in-between -1+jX (PI-Y degrees) > and -1-jX (PI+Y degrees). > > Is that logical? To see...

Re: How to convert MALE voice into FEMALE voice???

This is one of the greatest effects in vocoders. I remember doing it once to Amitabh Bacchan's Voice. Hope there are no fans around. Of Course there was a bug. I dare not do it intentionally :-) I guess using only a filter wouldn't be good enough. If you use a parameteric codec, which extracts...

Re: speech detection

doggie wrote: > Hi everyone, i have implemented my speech detection algorithm based on > energy detection,zero crossing and a few other parameters. Now i would > like to proceed further by using neural network and fuzzy logic.Anyone has > any ideas how should i proceed? For example, in image...

Re: VAD implementation

Giulio Petrucci wrote: > I need to design a Voice Activity Detector (VAD) to "sample" the noise > in a non-realt-time environmet (I will performe the noise-speech > separation on some recorded files, so I have no limits on time using and > similar). In order to achive this aim, co...

Re: Please Recommend Book on Audio/Speech

The modem speech coding is based on the LPC algorithm in the time domain , multiband algorthim in the frequency domain. LPC based speech codecs are EVRC, QCELP13, AMR series, and ITU-T G.723.1, G.729 series. multiband speech codec are IMBE, and AMBE. The audio coding is based on FFT, MDCT bas...

Re: End Point Effect on prediction

dbell wrote: > > In the audio compression, windowing is used to reduce the end point > > artifacts of the autocorrelation analysis. The most common are Hamming > > or Barnwell windows. > > > > Barnwell? Bartlett? T. Barnwell "Recursive windowing for generating autocorrelation c...

Re: IIR with fixed-point numbers?

robert bristow-johnson wrote: > in article Xns9669C03C378B6aclarkdanvillesignal@66.133.129.71, Al Clark at > dsp@danvillesignal.com wrote on 06/02/2005 19:53: > > > > > I think the basic DF II floating point IIRs are cheaper (execution time) > > than the DF I filters. > > > > ...

Re: Quantized FIR Coefficients and MSE Optimization

Jim Beasley wrote: > > I have an MSE algorithm that optimizes using a closed-form solution > (based on estimates of the statistics). > > However my filter coefficients are quantized. I am sure I can get > further improvement if I can tweak them. Brute force is out because > the n...

Urgent openings for DSP(1-2 yrs exp) ONLY FOR (1-2yrs exp)

We are looking for Very talented DSP engineers! Anveshan Telecom Recruitment Openings Discover the new wave in communication: Anveshan Telecom is a total telecom solution initiative from a group of renowned Indian strategists who are the path breakers in the global telecommunication and i...

Urgent openings for DSP(1-2 yrs exp) ONLY FOR (1-2yrs exp)

We are looking for Very talented DSP engineers! Anveshan Telecom Recruitment Openings Discover the new wave in communication: Anveshan Telecom is a total telecom solution initiative from a group of renowned Indian strategists who are the path breakers in the global telecommunication and i...

Re: Companies with VAD/VOX solutions?

Matt Roos wrote: > Hi, All. I need to find out all I can about voice activity detection > (VAD) and companies that supply hardware or software implementations. > This could include C code for PCs or DSPs as will as hardware black > boxes with a mic/audio input and some sort of output switch...

Re: Doubts about G.191

On 12 mayo, 18:00, Vladimir Vassilevsky wrote: > jajo wrote: > > Hi, > > > I am going to implement a g.722 codec into a DSP. My first task has > > consisted of looking for information about it and I have just found in > > ITU-R an interesting file: G.191 "ITU-T Software Tool Libr...

Re: Q: Approximating signals by shift and summation of other signals?

Golabi Doon wrote: > Dear folks, > > Given a functions g(x) and a set of function f_1(x),...,f_n(x). My > goal is to approximate g(x) by (non-weihghted) sum of shifted f's. > Formally: > Min int( (g(x)-sum_i f_i(x+t_i))^2 ) > > Where int is integral with respect to x from -infi...

GAO Research G.729AB Real-time Evaluation now Available Online

Toronto, Canada ¡V September 29th, 2005 ¡V GAO Research Inc., (www.gaoresearch.com) a leading provider of embedded communication software, released an online demo of its G.729AB codec, available at http://www.gaoresearch.com/products/speechsoftware/other/g729.php. This real-time demo allows custom...

Re: Searching for fixed point g.728 sources

Steve Underwood wrote: > Phil Frisbie, Jr. wrote: > > > That depends on what you mean as 'free'. I am sure I have seen freely > > downloadable fixed point code, but you cannot actually use G.728 in a > > product without licensing it due to patented algorithms. > > Are you sure ab...

Re: Gaussian Noise Generation

Clay wrote: > On Jul 31, 3:14 pm, Vladimir Vassilevsky > wrote: > > Steve Underwood wrote: > > > Chris Barrett wrote: > > > > > > I'm trying to generate noise within a certain spectral range. I > > > > > > believe > > > > > > such noise is called Gaussian noise. Is there a way I c...