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0
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0answers
26 views

Can we calculate number of MAC operations performed by a DSP for calculating a mathematical expression? [on hold]

consider the expression : I want to know how many MAC operations would be done for computing value of Yg for one input Xg
0
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0answers
17 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
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0answers
28 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
33 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
73 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
33 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
17 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
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0answers
6 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
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0answers
45 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
62 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
40 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
81 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
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0answers
16 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
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0answers
38 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
59 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
0answers
20 views

Find similarity rating in trajectories

I've got trajectories encoded in black and white. These are stored in a matrix with dimensions 150x150 (i.e. black = 1, white = 0). An example of two trajectories below (plotted): My objective is ...
0
votes
2answers
49 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
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0answers
32 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 ?
0
votes
0answers
63 views

EEGLAB: going from a .bdf file to a MATLAB matrix

I am looking for the assistance of someone familiar with EEGlab (for MATLAB). I'm using an online dataset from this site, just trial 1 for now. Essentially I have a bdf file and an elp file, and I ...
0
votes
0answers
102 views

Velocity from acceleration data

I have an acceleration data from accelerometers. I want to get velocity from the data by integrate it using matlab. Here my coding :- ...
0
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0answers
10 views

significance of real valued coefficient and complex valued coefficient

What is the significanceof real valued coefficient and complex valued coefficient with respect to DCT and DFT.And how does it effect signal processing?
2
votes
1answer
87 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
82 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 ...
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
122 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
63 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
126 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
107 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
276 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
205 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
2k 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
39 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
103 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
2k 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
61 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
67 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 ...
1
vote
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
857 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
226 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 ...
1
vote
4answers
662 views

given a mixture of two signals, how to separate it to its base components?

I have a signal that contains two components. How can I separate it two its two components in matlab? Please note that the location and shape of components are different in each experiment and we do a ...
2
votes
2answers
12k views

How to analyze audio input/spectrum correctly

I am quite new to Java and Signal Processing, but I was assigned a project dealing in audio processing. My topic given to me is a game that has a component of analyzing a song (any given song) and ...
1
vote
3answers
2k views

What is a window function in DSP and why do we need it?

When designing digital filters we start off with FIR and IIR. Later on we talk about window functions e.g Kaiser and Hamming windows. I do not understand why we need so many type of window functions ...
1
vote
4answers
201 views

Best signal processing method for this application?

I have a signal I'm getting from a sensor (shown below in the photo of an excel plot) and I need to process it to get it to look something like the red line I've overdrawn on it. Sort of a moving ...
2
votes
1answer
90 views

Is video considered a Tensor?

A sampled single dimensional signal is a vector. A sampled image is a matrix. Is video considered a rank-3 tensor since it is a set of images stacked on top of each other?
-1
votes
1answer
55 views

benefit of dividing the signal processing job into two computers? [closed]

I am not sure if this is the right place to ask this question. I am asking it anyway.. In Aircraft Airbus 320, control inputs from the pilot's sidestick are processed by two computers for different ...
2
votes
0answers
66 views

Log LUT applied before bebayering vs applied to RGB

In order to get more detail when encoding the blacks, a log LUT is going to be applied to the pixel values. Like gamma, the logical place to do it in the image processing pipeline is after ...
6
votes
3answers
3k views

How do I go about detecting whistles, pops and other sounds in live audio input?

I've read many questions on SO, and frankly, each one of them is not describing any particular way to go about it. Some say "do fft" and some say "zero crossing" etc. But I've only gone as far as ...
1
vote
2answers
674 views

generating ultrasonic sound in matlab

I am working for my class project on making animal repellent , I need to know how I could go about taking a normal audio file and shift its frequency/Pitch very high to make it an ultrasonic sound.
1
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5answers
4k views

Best method to extract phase shift between 2 sinosoids, from data provided

I have been asking around if the way I was extracting phase shift (lag) was correct, and I ran into some trouble... so in general, given 2 arrays of data of the same length, one represents the input ...