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

Re: FAQ - Perhaps there are real professionals here today rather than uppity technicians?

Polymath wrote: > Frequently Asked Questions (F.A.Q.)..... > > 1. (A Frequently Added Quotation, F.A.Q., is appended below.) > Assuming that we were able to generate a Diracian, and then produce > a comb of them by delays and by superposition, there wouldn't be a > factor > of "T" in...

Re: Linear Time Variant systems

"Rune Allnor" wrote in message news:f56893ae.0307290047.2fe59244@posting.google.com... > Wrong! The problems I have been working with have immediate impact on the > lives and safety of humans. Well, raising the stakes doesn't change the game, but... > Some parallels are well known f...

Re: Basic Filter Query

"Sandeep Chikkerur" wrote in message news:d5d88eb5.0309030114.3374f77e@posting.google.com... > Hi, > > The order of a digital filter is the number of previous inputs (stored > in the processor's memory) used to calculate the current output. > > My doubt is, how can one estimate the...

Re: Dthering....

Piergiorgio Sartor wrote in message news: ... > Let's say I've to quantize a signal from 12 bits to 8 bits. > > 1) Does it make sense to apply dithering at all? > 2) The noise (dithering) signal, must be real noise, or it > is enough to be just an uncorrelated signal? > > For...

LPC question

Hi, I have read some litterature about linear prediction. However, I haven't been able to find any litterature that explains in mathematical terms exactly why minimization of the variance of the residual leads to an estimate of the all-pole filter coefficients. The known output of a 10th...

Re: Rigorous definition of the Spectral Density of a random signal?

Carlos Moreno wrote in message news: ... > Mike Rosing wrote: > > Carlos Moreno wrote: > > > > > So, can someone help me with finding a rigurous definition > > > of what the value at a given frequency of the PSD of a > > > random signal means? > > > > howdy Carlos, > >...

Re: rephase my problem: how to reduce round-off error for hardware implementation?

Jerry Avins wrote: > Round-off error amounts to lost information. There may be ways to guess > what was discarded, but there is no way to get it back with certainty. > Round-off error is minimized by calculating with more pprecision, be > that decimal places or bits. Assuming that the...

Re: (statistics)how to make date more like Laplacian distribution?

In article , "walala" wrote: > If I already know a prior that my data distribution should follow the shape > of Laplacian distribution... the data obtained from measurement is of course > a little off(not very symmtrical), how can I make the measured data more > Laplacian distributi...

Re: Can achieve the Shannon capacity wihout coding?

James K. wrote in message news: ... > Today, my colleagues asked me whether it is possible to achieve the > Shannon capacity when no coding is used. > yes it is possible At the considerable risk of revealing my utter ignorance of communications theory -- isn't the presence of a c...

Re: newbee fft question, decimate or mix??

On Fri, 09 Jan 2004 22:07:32 GMT, Randy Yates wrote: > albert wrote: > > > I am attempting to use a PC soundcard and Spectrum Lab software to > > detect the presence of a very weak input signal at 600 Hz. > > > > I know the frequency of the input signal and I know it does not drift ...

Re: Need Help For Iterative Decoding(For RA Code)!!

Hi. I am pasting below the code I used for decoding when I worked with LDPC codes. If possible, try replacing the code you have with the one down below, and see if you still get the same kind of errors. And there is nothing to be despaired of. I had similar problems too. Just that I don't r...

Help needed in Finding of Standard deviation of Random Noise

I am reading a digital signal processing book "The Scientist and Engineer's Guide to Digital Signal Processing" 2nd Edition by "Steven W. Smith" I could not understand the following concept in its second chapter QUOTE Each random number has a value between zero and one, with an equal...

Re: Bifurcations in delta-sigma A-to-D converter

For a first order loop, holding the voltage constant at 1/2 scale (also at 1/8, 1/4, ...) will show some limit cycle. This is a well documented problem. A higher order loop or a quantizer of more than 1 bit will reduced this problem. Another technique is to add random noise in the loop, jus...

Re: algorithms for location versus for frequency?

Ron N. wrote: > Jerry Avins wrote: > > > Ron N. wrote: > > > > > Jerry Avins wrote: > > > > > > > I don't know about best, but time measurements are good. You might even > > > > count zero crossings. That will establish the duration within a cycle. > > > > > > I assume you meant to s...

Re: 1-Bit Wave File?

"Curious" wrote in message news:34a4f456.0405191922.1d69cdf6@posting.google.com... > Randy Yates wrote in message news: ... > > curious11112001@yahoo.com (Curious) writes: > > > > > I am looking for audio software that allows conversion of 16-bit WAVs > > > and 8-bit WAVs ...

Re: Noise variance

Hi Chintan, I think you are asking how a known frequency response affects the variance of white noise passing through it. Imagine that the white noise is broken into its component sinusoids. Since its random noise, each of these sinusoids is uncorrelated with the other sinusoids. So, to find ...

Re: Pseudorandom Hashing

On Thu, 23 Sep 2004 15:26:18 -0700, Tim Wescott wrote: > Jim Thompson wrote: > > On Thu, 23 Sep 2004 14:40:28 -0700, Tim Wescott > > wrote: > > > > > > > I am having trouble coming up with the right keywords to do a web > > > search, so help me out here: > > > > > > There is a...

comp.dsp FAQ [1 of 4]

Archive-name: dsp-faq/part1 Last-modified: Tue Oct 19 2004 URL: http://www.bdti.com/faq/ FAQs (Frequently asked questions with answers) on Digital Signal Processing The world-wide web version of the comp.dsp FAQ is maintained and sponsored by Berkeley Design Technology, Inc....

Re: how to estimate the additive noise and get rid of additive noise in image?

kiki wrote: > Hi all, > > I obtained some pictures using camera. It looks to me there are some > additive noise that was added to all image pixel components: from what I've > observed, there are many small fluctuations/peaks/spikes of height 10-30, > while the useful image region has...

Re: does WGN(white Gaussian noise) imple zero mean?

Randy Yates writes: > "kiki" writes: > > > Hi all, > > > > I read through several books but did not get clarification on whether > > WGN(white Gaussian noise process) imply zero mean or not... > > Hi Kiki, > > Now you've got me wondering. On one hand, I've heard t...

covariance question

If a zero-mean Gaussian random noise signal is at the input to a matched filter bank (so the input to each filter is identical), what is the nature of the outputs of each filter in the bank? Assuming the filters are linear then each output should also be Gaussian, but are they correlated or m...

Random Noise generators

Hello, Can somebody please tell me how to generate a noise signal on the basis of its statistical characteristics? i want to create a c++ function with the following syntax: ============================================================= valarray GenerateNoise(int type,double* stats, size_t...

Re: white Noise

Abdul wrote: > It is possible to describe white noise by a mathamatical function ?? Depends on your definition of noise. True random noise? no, you can't mathematically represent it. Noise produced by a pseudo-random number generator of some sort? yes, represent it using the mathematica...

The changing of sampling rate of AD1819A

Hello, everybody. I'm just a beginner. I use ADSP-21065L SHARC EZ-KIT Lite where is codec AD1819A. The default sampling rate is 48 kHz and I need to change it. But it's so difficult for me to do it. I would like to change it for example from 48 kHz to 8 kHz. Please help me if you can. Thank you ve...

Re: Need suggestions for literature: Radar/Sonar pulse design

"Rune Allnor" wrote in message news:1110539951.781399.136910@l41g2000cwc.googlegroups.com... > Hi all. > > I am involved in a project where we need to design > a signal for an active sonar type measurement device. > My background is mainly from seismics, where one usually > isn't ...

Re: differentiate between an arc and one caused by a load

Siva wrote: > hai, > > I'm working on getting a system that will distinguish between an real > arc and one that are caused by turning on some loads. > > so far what i did was take two set of data from a load across a shunt > and do a least square method to obtain the residual. alth...

Re: How can I surpress noise in an ADC board?

"Frank" wrote in message news:439f771e$1@news.starhub.net.sg... > > "John Herman" wrote in message > news:irDnf.6196$hI1.3714@tornado.socal.rr.com... > > ENOB is relative to the maximum signal level and isn't much help if a > > measurement of system noise is desired. > > > > ...

Re: Does LPC analysis of noisy speech make any sense?

"Matt Mahoney" wrote in message news:1147966050.144318.315640@j73g2000cwa.googlegroups.com... | Jack wrote: | > Hello, | > | > I have read some literature about LPC analysis as a tool | > for estimating the parameters of a source-filter speech model. | > | > According to the model, ...

Re: phase addition to spectrum of signals and reconstruction

adj wrote: > please could you explain in a little more detail. i would very much > appreciate it. also could you tell me some sources where i can read > more on even symmetry and odd symmetry of magnitude and phase parts. > thank you very much in advance. Your original signal was real, an...

Re: Software Pulse Amplitude Demodulation

> Hello, > > Have you tried taking an HP signal generator and applying a simple 200MHz > unmodulated carrier and seeing what the noise is like? One of the things you > will want to know is what is the phase noise of your mixing oscillators? So > if you work with a strong signal from a good ...

Re: Basic Signal Processing Question

John Monro wrote: (snip regarding DC component) > I thought that remark might be controversial, but unfortunately I was > not able to check for responses until just now, so apologies for the delay. > By 'DC component' I mean the DC level you would measure if you applied > the sampli...

Adaptive Feedback Path Tracing Mismatch Problem

Hi, all I'm doing the acoustic feedback path tracing for hearing aids applications. My method belongs to non-continuous method. i have a random noise u(n)as the input of my adapitve filter and a prescribed 160-tap feedback path F(z). I use 160FIR adaptive FIR filter W(z) to model the original 160-t...

Re: Noise Subtraction

wrote in message news:1123776508.188773.199810@f14g2000cwb.googlegroups.com... > My boss showed me a feature on some commercial software he wants me to > incorporate into our system. > > Basically, you show the software a patch of noise (samples w/o the > signal). Later, the progra...

Re: Resolution of phase (basic questions of FFT)

Sjaak skrev: > I just started with DSP and think this is a simple question. I'm mostly > interested in audio processing using FFT. My question is, what is the > maximum resolution of the phase (for each frequency)? i.e. When > transforming a 1024 samples signal (each 16bit integer for audi...

Re: Encoding residual (LPC on speech signal)

[ crossposed to comp.speech.research as you'll find a lot of knowledgeable people there] Carlos Moreno writes: > As part of my research project, I'm working on vector-quantization > applied to an LPC-like encoding scheme. > > For each frame of speech (I tentatively put a frame le...

FM Demod related Question - AGC multiplier

Hi All, I am still working on this FM demod project and although it is now working, I am trying to make it better with AGC throughout the design and I have hit an interesting problem. I basically have the I and Q signals that come from mixing the input with a cos and -sin nco output, and...

Re: PLL convergence problem

yoni.baron@gmail.com wrote: > I have a "phase detector" for timing synchronization based on 4th order > non-linearity. I use a very narrow loop-filter - 400Hz when the > sampling rate is 10MHz. > The S-Curve for the detector shows nice curve (I use ~10000 averages > for every point in th...

Re: Questions about equivalents of audio/video and digital/analog.

isw wrote: > floyd@apaflo.com (Floyd L. Davidson) wrote: > In both of those (as they are actually used in the real world), > communication is accomplished by the propagation along them of > electromagnetic fields; never anything else. > > Doesn't matter one whit whether you turn the field...

Re: Rant on "Some thoughts abouth thinking"

"Jerry Avins" wrote in message news:tqSdndhRFuFAAcvenZ2dnUVZ_tGdnZ2d@rcn.net... > Jon Harris wrote: > > "Jerry Avins" wrote in message > > news:67GdnQ0eCuJHOM7enZ2dnUVZ_sidnZ2d@rcn.net... > > > > > Jon Harris wrote: > > > > > > > > > The fundamental constants being a life-allo...

Re: Digital remastering of recorded voice problem

Suppose your .wav record consists of [quasi]periodic signal(s) and random noise. You may try to add and "average" few periods. To find a period, use auto-correlation or AMDF. This is just obvious idea, I have never tested. Vladimir. ...