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Hello,
I've been going through Linde-Buzo Gray algorithm (1980) and Lloyd's k-means algorithm and both seems to be doing exactly the same thing (or maybe I'm not researching well).
They seem to be going through the following:
1. compute initial codebook randomly from training set.
2...
OFB is basically orthogonal filterbank and V2 is the subspace which is represented at V2=V1+W1. I believe (correct me if I stand wrong) that basis for V2 is rho(2^2 t - k) which is basically given in the book and the basis could be found by substituting the values of k and t from given f(t)...
I would like to clarify my concept on basis for subspaces. For example: if you're given a time domain function, f(t)= { 1 for 0<t<1/4 and 3 for 1/4<t<1/2 }. How would you represent f(t) in terms of basis for subspace v2? Do we have to make use of the formula rho(2^j t - k)?
Hi!
I have a doubt regarding the concept of orthogonal filter bank. In case you're having filter P(w)=1+cosw, we all know that could be used to obtain low pass filter h0(w)=(1+e^-jw)/sqrt(2) using the relationship P=|C|^2. My question is when you're given even more complex filters like...
I'm asking for better explanation of the characteristics of half band filters which are basically the condition for perfect reconstruction. So for instance, can you please explain me how would I determine if the filter: p(0)=p(1)=1 is half band filter?
Hello,
I've tried to search for this topic online and even tried to look the book wavelets and filterbanks by strang it didn't help much to develop my understanding of how half-band filters are uniquely identified. Hence I'm posting here to know your perspective of how would determine them...
Greeting experts,
I need your opinion on the following statements. In order to get the window for linear interpolation, I had the formula: p(t)=1-t/Ts where Ts, I took it as 5 since I sub sampled the original image 4 times. Then, I had my window from -Ts to +Ts i.e., [0 1/5 2/5 3/5 4/5 1 4/5...
Hello Folks and my dear experts,
I have a question regarding radio using simulink. I understand the modulation part of it in which the signal adds up with DC and then convoluted with carrier. What I am confused about is the radio part of the modulation. To be specific, with the knowledge of...
Look I have alrady solved this thing using Euler's but the point is now I want to solve it using the property. The main thing is "I need to use the property". And how would I do that? That's why I'm here!
Hello guys,
I have a small confusion in the attached question. First I converted the sin^2 using formula to cosine. Then I used scaling property which states that x(t) becomes (1/a) X(w/a). Okay for simplicity, w means omega. I currently have x(t)=cos(wt) + ((1/2)-(1/2)cos(2wt)) and I really...
Thanks but I think maybe I am forgetting some parameters and confusing you all. Okay so to be clear here's the image of the question.
Part a is fine. When computing part be I get β=2cosω. Then after computing by method cosω=x[n+1]+x[n-1] / 2x[n], I get ω=0.4190=2Π/15.
After this, I would have...
Hello friends,
I have a silly question (I admit it's silly but I'm not getting it :cry:).
I have this signal x[n]=Acos(ω n+φ) where I have the value of n and it's corresponding x[n] value. Also I have the value of ω which is 2Π/15. Now all I need is to find the value of amplitude A and φ which...
Okay what do you think about this one? I will get a positive voltage supply unless I want a negative one. But the problem is that the voltmeter should show 20Vac and its not. Am really frustrated with this problem. I think there's something wrong with the transformer. What do you think here...
I actually need a 220V ac source since the local main in the country is 220V ac.
And this is what I am getting on the voltmeter. Am not getting why is it showing this value instead of 12V.
Alright, but now I have one more problem. I need a voltage outlet of 220Vac which is capable of supplying fixed or variable DC voltage. I am confused as to how would I make this happen. Thanks alot for your response.
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