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0
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1answer
31 views

audio recording conversion to decibels(db) [on hold]

I have several audio recording like the crying of a baby, the sound of a moving vehicle etc.How can I convert the audio recording to Decibels (db)value
0
votes
0answers
33 views

Baseline Correction: What is the concept of a baseline shift and baseline correction?

I have a laser induced fluorescence signal data-set. Currently the processing pipeline performs baseline correction by manually moving the signal so that the initial point is at the origin. Is this a ...
0
votes
0answers
13 views

Denoising ECG signals using multiwavelets

I am trying to denoise an ECG signal using multiwavelets like GHM, CL, SA4... I am able to decompose and reconstruct the ECG signal. But I am not able to denoise by applying the threshold methods ...
0
votes
0answers
15 views

1D EEG signal conversion to 2D

What is the exact method for converting 1D EEG signal to 2D? Can you please suggest some MATLAB coding's for conversion?
5
votes
1answer
67 views

Bandwidth expansion by computing missing harmonics in music?

In old recordings or highly compressed audio files (lossy), the higher frequencies are lost, and we hear a distinctive muffling effect. (Just like if the song was played through a wall) Is it ...
0
votes
0answers
62 views

Practical diversity combining at receivers (Maximal Ratio Combining & Equal Gain Combining)

I am trying to perform practical diversity combining implemented in GNU Radio by using Ettus N210 USRPs, one as a transmitter and two as receivers. To compare Equal Gain Combining (EGC) and Maximal ...
0
votes
1answer
34 views

How to extract pixel-specific time-stream from mp4 video

I am interested in extracting specific timechange information from an mp4 1900x1200 20fps video.The only pixels I want to process can be found in its borders. Therefore I only need to process ...
1
vote
1answer
100 views

How to remove 50 Hz frequency noise from a PCM file?

Are you kind to tell me the odds or the means by which should I grab a clean signal with the $~50 \mathrm{Hz}$ carrier removed using just programming? I managed to make a program in Visual-C that ...
0
votes
1answer
87 views

A question about sampling theory

Let`s say I have a signal $m(t)=\cos(4\pi t) + \cos(6\pi t)$ so we can say the signal is containing frequencies $f_1= 2\mathrm{Hz}$ and $f_2= 3\mathrm{Hz}$. The cut-off frequency of the low pass ...
0
votes
0answers
66 views

How to convert fft plot into PSD(Normalized) vs Freqeuncy (Hz)

I am trying to convert my fft signal into PSD(Normalized) vs Freqeuncy (Hz) but can't get it right. I want to get some thing like shown in the figure. I found these figures in the literature. How to ...
0
votes
0answers
28 views

How can we add energy to an image using matlab?

In under water images due to attenuation of light in water ,image appears to be blue so in order to compensate that attenuation ,I calculated the energy of light that is attenuated and i am unaware ...
0
votes
0answers
23 views

How can I prove this equality

considering the following equation $$h(n)=\sum_{k=1}^{p}a_{k}h[n-k]+G\delta(n)$$ where $\delta(n)$ is impulse function. if autocorrelation function as follows $$R(m)=\sum_{n=0}^{\infty}h(n)h(n+m)$$ ...
1
vote
0answers
38 views

Quantifying how good I'm producing a spectral density

I recently asked a question here on how to create noise with a specific spectral density $S_{xx}(f)$. The helpful people of this stack exchange told me one way to do it was filtering white noise with ...
1
vote
1answer
202 views

Matlab signal processing removing white noise from signal

What is the way to address the removal of white noise from a signal? Extra Details Hi I also agree the details are as follow: ...
3
votes
1answer
54 views

Sound reflections plot

This is probably an idiotic question, but I'm at a loss of what to even google for. I have sound files that contain recordings of an impulse signal in a room. I'd like to make such a plot from it. I ...
0
votes
0answers
24 views

Fractional Interpolation Polyphase

I explain my problem. I have to implement an oversampled filter bank. The first stage of the general architecture is serial to parallel converter with a decimation factor M < K channels. In my case ...
0
votes
0answers
30 views

polyphase fractional interpolation

i've a tricky question. Suppose to have an adc with 16 output lanes, in which the data are formatted as follow: s16 s0 s17 s1 . . . . . . s31 s15 Each lane ...
0
votes
1answer
79 views

Is this a kind of aliasing error and how to make correction?

I use a Discrete Fourier Transform to have a representation in the frequency domain: Notice that, both the real and the imaginary line are softly reaching zero on the left, from 0.5 Hz to 0 Hz. ...
3
votes
1answer
78 views

Is $A\cos(\omega t+\theta)$ a Gaussian random process?

$Z(t) = A\cos(\omega t+\theta)$ where $A$~$N(0,\sigma ^2) $ and $\theta $~$(0,2\pi)$ are independent. I'm trying to figure out if $Z(t)$ is a Gaussian random process and whether it is strict sense ...
0
votes
1answer
52 views

Frequency Representation of Downsampled Signal

I'm trying to follow the steps from Oppenheim for the derivation of the frequency representation of a signal which is to be down sampled by a factor of M. It makes sense to me that: But then the ...
0
votes
1answer
35 views

Which image for DoG filter?

I am studying computer vision and have some trouble with difference of Gaussian filter. We apply Gaussian filters with different values of sigma on original image then subtracting from them. However, ...
0
votes
0answers
7 views

How do I combine Gaussian and Non Gaussian signal for testing its normality?

By using Shapiro-Wilk test, I want to check normality of signal. So for that purpose I want to get a signal in the combination of alternate Gaussian and Non-Gaussian signal. Please help me for getting ...
0
votes
0answers
50 views

How to determine the magnitude of the discrete time Fourier transform

I am new and studying the discrete signal processing. I am solving the question related to DSP, and I am having trouble in understanding the breakdown of signal through DTFT. Determine the DTFT ...
1
vote
1answer
75 views

Path to becoming an audio engineer [closed]

Can someone write down steps an totally beginner in EE and DSP needs to pass to become a audio engineer? From which subject to start with (math, electronics), and with which subjects to continue this ...
0
votes
0answers
52 views

How to reduce / filter out the overshot of the signal

I am very New to DSP. I would like to damp the overshoot part of the signal which is shown below. With my limited knowledge I tried to use a LPF to filter the noise. But I am getting a envelop of the ...
1
vote
1answer
181 views

Range-Doppler matrix

I am working on a radar simulation to calculate the range and the Doppler frequency of a target. I would like to build a range-Doppler map or range-Doppler matrix. I do not know the steps to develop ...
0
votes
0answers
17 views

HDMI single splitting

I'm working on a little project, and in it i have the need to take an one line signal (one stream of zeros and ones), and to split it in a way it would go to an HDMI port and would be read correctly. ...
0
votes
0answers
54 views

Monostatic range-doppler algorithm

I was told that this question is too broad. Maybe I don't understand what this forum is about. My question is basically the same. I am looking for references to range Doppler algorithms so I can learn ...
0
votes
1answer
84 views

Cancelling the acoustic echo that occurs with a variable delay and volume

I am trying to build a software that records audio to a server and then broadcasts that audio into the same room that the microphone is present. This means that the audio signal is uploaded to the ...
0
votes
2answers
96 views

print a date and time in command window MATLAB [closed]

I use matlab R2015a, when I run my script I want print the date and the time of exection I tried this code ...
1
vote
0answers
35 views

what is the difference among noise,blurring and contrast? [closed]

I want to know the following what is the difference among noise,blurring and contrast ?
3
votes
1answer
98 views

Controlling one signal with another one (Rocket engine effect - Subtractive synthesis of sound)

I programming some sound effects in Java and exporting them into .wav files. Currently, I am trying to program a rocket engine sound effect. I want to do it in the following way: The sound of a ...
2
votes
2answers
90 views

Why do we care if a system is BIBO stable?

I'm wondering what the actual application of this tidbit of knowledge is. I am currently a student in a Computer Engineering undergraduate program and I was wondering what the applicability of this is....
0
votes
1answer
39 views

Signal remains constant when implementing FSK

I am trying to implement FSK Modulation. For bit 0 and 1, I defined a frequency wave (for instance, for bit 1, c = cos(2pift), with t = 0 : 1/fs : (1/fs)*N - 1/fs, where fs is the data rate). When I'm ...
0
votes
5answers
144 views

Looking for an algorithm that computes “Similarity” between two signals

I'm new in this forum! ... and I'm not an expert in signal processing! ... So I hope to find help here:-) I was wondering if someone could point me to an algorithm/technique that is used to compare ...
1
vote
0answers
67 views

How to perform FFT on stored digital data [closed]

I have to do FFT in MATLAB on the digital sinusoidal data that is stored in excel. please find the amplitude values of the sine wave discrete signal stored in the Lookup table. Number of points : ...
0
votes
1answer
209 views

When do we normalize data in audio processing?

Lets assume we have a simple audio processing flow with preprocessing, feature-extraction and classification. Where and why do we normalize the data? I know the purpose of normalizing the data in ...
1
vote
0answers
117 views

Processing IQ signals [closed]

Signal Characteristics: The IF (I/Q) signal consists of a DC component and an AC component. DC Component: 2.52V; AC Component: 1.72 – 2.04 V (V P-P); BW: 20Hz - 500kHz; Power: 20dB Requirement: Now ...
0
votes
2answers
359 views

Tutorial for a stereo Phaser in C++?

I was searching for a tutorial on how to implement a stereo Phaser in C++. All i´ve found was sourcecode with little or no explanations which did´nt help me much. Does anyone know a Tutorial with ...
0
votes
6answers
237 views

Call recognition using Digital Signal Processing

We are looking for writing applications which would recognize Bird calls and Frog calls using Sound processing. EDIT: I want to identify the species of bird / frog and do not want to differentiate ...
0
votes
0answers
3k views

Radon Transform Implementation In Matlab

I know MATLAB has a built in Radon function, but I am working on implementing the radon transform in order to perform filtered back projection. As I started, my idea was multiple nested for loops for ...
0
votes
0answers
41 views

What filters used in this picture?

What filters are used to get an image like one on the left? I need to find body pose of a person in a picture.
1
vote
2answers
112 views

Ship detection from aerial image

I have an aerial image, like this I want to detect the outline of the ship without shadow. How can I do it? I tried threshold in both graylevel, RGB and HSV. It doesn't work perfectly.
5
votes
5answers
3k views

FFT Processing Gain

When transforming a noisy signal via Fast Fourier Transform from time to frequency domain there is a "Processing gain" of the FFT which increases as number of bins increases. I.e. the more bins I have ...
-1
votes
1answer
81 views

Extracting a signal from data array in non real time - best approach?

I have several thousand values from an ADC sampling at 5MSPS. I want to extract/enhance a signal in the data (16 bit, sinusoidal) between 50kHz and 200kHz. It is not real time - the ADC has stopped ...
2
votes
1answer
72 views

Forecasting noisy data with polynomials

What's the best way to incorporate polynomials or sinusoidal equations into a linear model to predict a future amplitude in this sort of data? You can see that if those polynomials continued to go on, ...
1
vote
0answers
68 views

Finding a signal in noisy data

I have a large data set that was collected by a 5 GHz oscilloscope, so I basically have an array of voltages with each index being a very small time step apart. I am looking for a specific signal in ...
2
votes
1answer
1k views

Time-frequency representation of sound signal using Matlab

I am currently doing a project on sound signal processing by using MATLAB. I have a problem regarding creating the command line so that I can get a graph containing frequency by its time. But this ...
0
votes
2answers
1k views

How to get the 10-5 most dominant frequency in an audio signal

I have this wav file that I recorded using my laptop, It contains the sound of a G chord of a guitar. Since the guitar have 6 strings the sound should contain different frequencies I want to determine ...
3
votes
2answers
264 views

What is the state of the art for vocal elimination/reduction?

I have no background in signal processing but I would like to know what is the actual state of the art for vocal elimination/reduction. Obviously, I am not talking about the infamous "stereo ...