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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 13 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 13 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...

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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, ...

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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()?

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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 13 ans il y a | 0

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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 ...

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Gaussian mixture model--maximum likelihood
Someone please answer my question.

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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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Reading audio
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 ...

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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.

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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 ...

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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 13 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)...

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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...

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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...

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