Réponse apportée

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...

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

Réponse apportée

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

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

Question

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?...

plus de 12 ans il y a | 1 réponse | 0

Question

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

Question

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

Question

Difference between pitch and frequency?

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

plus de 12 ans il y a | 1 réponse | 0

Question

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...

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

Question

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...

plus de 12 ans il y a | 1 réponse | 0

Question

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...

plus de 12 ans il y a | 1 réponse | 0

Réponse apportée

1)Amplitude modulation. 2) Negative amplitudes in the signal??

To find the spectrum of the signal is there any other method apart from fft()?

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

Réponse apportée

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...

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...

plus de 12 ans il y a | 5 réponses | 0

Réponse apportée

Speech processing using matlab

I did that by taking fft and considering only the first half of the spectrum.

Speech processing using matlab

I did that by taking fft and considering only the first half of the spectrum.

plus de 12 ans il y a | 0

Question

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...

plus de 12 ans il y a | 1 réponse | 1

Question

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

Réponse apportée

Gaussian mixture model--maximum likelihood

Someone please answer my question.

Gaussian mixture model--maximum likelihood

Someone please answer my question.

plus de 12 ans il y a | 0

Réponse apportée

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...

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...

plus de 12 ans il y a | 0

Question

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...

plus de 12 ans il y a | 1 réponse | 0

Question

Reading audio

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

plus de 12 ans il y a | 1 réponse | 0

Question

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...

plus de 12 ans il y a | 4 réponses | 0

Question

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

Réponse apportée

Speaker recognition

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

Speaker recognition

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

plus de 12 ans il y a | 0

Réponse apportée

Speaker recognition

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

Speaker recognition

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

plus de 12 ans il y a | 0

Réponse apportée

Speaker recognition

William I am much awaiting for your response.

Speaker recognition

William I am much awaiting for your response.

plus de 12 ans il y a | 0

Question

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...

plus de 12 ans il y a | 8 réponses | 0

Question

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

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

Réponse apportée

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)...

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

Réponse apportée

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...

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

Question

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