# Tagged Questions

The tag has no usage guidance.

18 views

### time correlation between two time varying signals [duplicate]

I have two time varying signals (sig1, sig2). I have to calculate the correlation between these two signals over time ( as shown in the figure).After all have to calculate a single number ( may be ...
32 views

### Audio transient characterization of instrumental music

Some time ago, I seem to recall hearing or reading of an audio experiment where the very short initial transients of one musical instrument (A) were spliced in front of the much longer steady state or ...
52 views

### How do I decode(demodulation) and get original data from audio sample data

Here I'm talking about the less-than-ideal situations, in other words, the audio sample data may have burrs or error bits in it. Encode and decode theory: I am using FSK to encode my original binary ...
106 views

### Comparison/Difference between two distinct plots

I am making a project where I can identify leaves by taking a picture of them and a database. I will use their widths to determine their shape. So, I worked across the stem of the leaf each width and ...
21 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 ...
36 views

### Comparision between the shapes of two waveforms using coherency / correlation

I am trying to compare the shapes of two switching waveforms ... and I woud like to check whether they have the same peaks, rise times and shape... Is it possible to compare how similar they are ...
25 views

### what's the integral of the triangle waveform function?

So, the triangle wave is the integral of the square wave, right? But what is the integral of the triangle wave? thanks
59 views

### Problem in reading speech waveforms

I have two waveforms, and I'm not sure which of them is for the word "cease" and which one for "shoot". Now I guess based on voiced and unvoiced waveforms(voiced should be periodic), the first one is ...
142 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 ...
169 views

### Similarity between two Signals: cycle by cycle

I need to find the similarity between two signals, i.e., measured signal and the reference signal(e.g. a simple sinusoidal signal). What I mean by similarity is, if there is any decentralized glitch ...
122 views

### matching the mouth shape of an audio file(lip sync)

I am working on something like cartoon, but the character's mouth shape is automatically detected and matched by the word they are saying. my guess is to use speech recognize algorithm to analyze ...
23 views

### Estimate the type of wavelet transform in receiver side

Suppose that a signal is decomposed by using discrete wavelet transform (DWT) and transmitted. Is it possible for receiver to find which type of wavelet is applied in transmitter side ? I mean, if ...
42 views

### Mathematical effect of reordering samples to known period, or equivalent-time sampling (ETS), and the interpretation or analysis of its result

I measure a natural raw signal over time, whose value is dependend on many factors of which several are periodic. I am interested in the effect of one such periodic factor and want to look at ist ...
455 views

### Similarity of signals

I have a question concerning methods to find different aspects of "similarity" of signals. So, first, I'd like to characterize the signals to be dealt with: We have a number of close to rectangular ...
2k views

### Cross-correlation peak

How get cross-correlation peak and based on it calculate correlation score for similarity of two audio samples. SO far I've FFT two samples complex conjugate second multiply results IFFT ...
1k views

### Normalized Square Error vs Pearson correlation as similarity measures of two signals

Which measure should be considered better and when ? I tested both the measures on some data that I have and I got mixed results i.e. some are showing better results with Pearson and some with the ...
3k views

### Calculating similarity between two signal plots

I have two plots, each having frequency as x-axis and Gain as y-axis. By taking one data set as a reference I have to calculate similarity between them. The graphs have same values on the x-axis and ...
2k views

### How to generate a good Sinus audio signal of specific SampleRate, DataBits and Chunnels in a time frame

I encountered a problem when I tried to generate by a program an sinus audio signal. My parameters are Sample Rate: 44100 Hz Data Bits: 16 bits Channels: 2 I need to create a WAV file ...
197 views

### Audio descriptor of data

Is there a way to generate a waveform from data (any kind of data: integer, hexadecimal, string, char, binary), in a common audio player, without converting the data to an audio format? I'm looking ...
363 views

### Why is there a mismatch between normalized cross-correlation and perception for basic waveforms?

To my ears, sawtooth and square waves are more similar to each other than either one is to a triangle wave. However, when I compare their magnitude spectra against each other using normalized ...
725 views

### Signal matching: How to quantify the difference between two signals of varying frequency

I have two waves, and I would like to quantify the difference between them. They are exponential sine waves where the frequency decreases with time. I'm interested in the difference in decay ...
1k views

### Audio signal comparison for automatic singing evaluation

I am trying to compare audio waveform from input waveform (A) to preset waveform (B)from in the device. I try to lookup everywhere. Most likely someone give such a source code as follow : ...
1k views

### What is the difference between normalized peak of correlation, versus peak of correlation divided by its average?

Given a template, and a signal, the question arises as to how similar the signal is to the template. Traditionally a simple correlation approach is used, whereby the template and a signal are ...