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How to remove the background/background noise from the images that comprise my video?
I think you got me wrong. You have performed tophat after you have processed the frames. You have to use imtophat before you pro...

plus de 12 ans il y a | 0

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How to remove the background/background noise from the images that comprise my video?
Use top hat or bottom hat. It is used to reduce illumination

plus de 12 ans il y a | 0

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Bandwidth of a channel
Bandwidth of a signal is the difference between the upper and the lower frequencies. What do by mean by bandwidth of a channel?...

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Qpsk decreases the bandwidth
I learnt that bandwidth is the bit rate. But when I was learning Qpsk I came across this sentence "For a given bit rate...

plus de 12 ans il y a | 1 réponse | 0

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iphone x-ray scanner
I was just wondering how the iPhone x-ray scanner (that scans palms) is working. Does that really send out x-rays? If so, ...

plus de 12 ans il y a | 1 réponse | 0

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Difference between pitch and frequency?
What is the difference between pitch and frequency? I would be happy if you give me some examples too.

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Polyphase filter
I have been reading about this since yesterday and I couldn't come to any conclusion. I need your help. Consider a signa...

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Convolution encoder
I got a doubt in this convolution encoder. When one or two incoming bits per symbol enter a rate-1/2 or rate 2/3 b...

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Fourier transform- a general question
Fourier Transform is used for representing non-periodic waves in terms of cosines and sines. Yesterday when I recorded my v...

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1)Amplitude modulation. 2) Negative amplitudes in the signal??
To find the spectrum of the signal is there any other method apart from fft()?

plus de 12 ans il y a | 0

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1)Amplitude modulation. 2) Negative amplitudes in the signal??
I have another doubt too (that I got before 6 months). How can frequency be negative? I mean how can you say "the no of oscilla...

plus de 12 ans il y a | 0

Question

1)Amplitude modulation. 2) Negative amplitudes in the signal??
I studied about AM before 6 months, I believe. When I studied that I got some doubt. How do you say AM takes twice the ban...

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Speech processing using matlab
I did that by taking fft and considering only the first half of the spectrum.

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time step problem in neural networks
Instead of normal array I tried using cells as input. input=[ c1 c2 c3 c4 c5 ]; where c1,c2,c3,c4 and c5 are the cells o...

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Speaker dependent speech recognition
I saw this link http://www.mathworks.in/company/newsletters/digest/2010/jan/word-recognition-system-matlab.html and I got some ...

plus de 12 ans il y a | 1 réponse | 0

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Gaussian mixture model--maximum likelihood

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Gaussian mixture model--maximum likelihood
I have only one doubt. I have about 12 means for every class and when I compare it with the given data (and find the log likeli...

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retrain neurons
I asked this question before and no one replied. So I am asking this again. I am new to neural networks. I tried the probabil...

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I recorded my voice and then converted that file to .wav format. then I did the following y=wavread('filename'); sound(y...

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Gaussian mixture model--maximum likelihood
I have 3 classes and I modeled the GMM for those classes with 12 components for each model. Now I have a data from one o...

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Gaussian Mixture Model
I am doing voice recognition using MFCC and GMM. First I found out the melcepst coefficients. There were about 12 mel ...

plus de 12 ans il y a | 1 réponse | 0

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Speaker recognition
What do you think about neural networks? It worked perfectly when I was doing image processing. Will that work with this?

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Speaker recognition
Do I have to use the guassmix function of the voicebox? Thanks in advance.

plus de 12 ans il y a | 0

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Speaker recognition
William I am much awaiting for your response.

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Speaker recognition
I am going to do a project based on speaker recognition (not speech recognition). I saw many files in the internet and came acr...

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ifft
I want to distort the phase of the frequency spectrum of a signal and not the magnitude. After that I want to find out the ifft ...

plus de 12 ans il y a | 2 réponses | 0

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Question

Two channels of a music
I am new to speech processing. When I saved the audio 'handel' in a variable 'y' I got only one channel. But when I did the ...

plus de 12 ans il y a | 1 réponse | 0

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How to change the pitch of a signal?
If possible provide me the code. Here's my code load handel.mat k=ifft(y); k1=k(1:length(k)/4); k2=k(3*length(k)/4:length(k)...

plus de 12 ans il y a | 0

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How to change the pitch of a signal?
I tried it but there doesn't seem to be any change in the pitch. Instead it was very fast and it played two times instead of one...

plus de 12 ans il y a | 0

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How to change the pitch of a signal?
I think you might have seen Tom Cat apps of Iphone. In that it will speak what you speak but in a different pitch. How to...

plus de 12 ans il y a | 3 réponses | 0

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