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Polynomial Decomposition in Filter Design
Hi, friends! Is there any good method for "Polynomial Decomposition" being used in Filter Design? For example, if I use Park-McClellan algorithm designing a 10-order FIR filter,then want to decompose the polynomial into five 2-order filters, and keep the overall magnitude response. Does anyone has good s... 16 Jun 2010 23:12
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I was asked to create a Decimator/Interpolator to go between Narrow Band (8 KHz Sampling) and Wide Band (16 KHz Sampling). I am not so familiar with english engineer lingo, so does the above mean that the samplerate of the input signal which is fed to the decimator/interpolator-algorithm will either be 8KHz or 16... 29 May 2010 19:01
"Repairing" an out-of- focus picture
Hi, My question might be simplistic as neither optics nor image processing is my field. Firstly, I was wondering if it is possible to compensate for a picture taken by an out-of-focus digital camera by doing a 2D deconvolution on it (MMSE filtering or something like that), in order to recover the in-focus pict... 1 Jun 2010 15:16
Semaphores in DSP/BIOS
OK, this may be a stupid question but I'm going to go ahead and ask it. I seem to be missing something very basic in the use of semaphores. The SEM module in DSP/BIOS maintains a non-negative count of the number of times it has been "posted". Then when a pend occurs, the process either a) blocks if count = 0, or ... 3 Jun 2010 12:15
symmetric 2D function....
Hello Forum, I am dealing with a 2D function of time. A 1D function f(t) is symmetric and even if f(t)=f(-t) I am dealing with a function f(t1,t2) instead for which f(t1,t2)=f(-t1, -t2). In the plane t1-t2, how many possible symmetries with respect to vertical planes can a function like f(t1,t2) have? I ... 28 May 2010 21:26
generating a coherent signal
If I have a signal (say x[t]), and from previous studies I know the coherence function (Cxy[f]). Is there a way to simulate a coherent signal (say Y[t]) from these two? We have a process that we already have a shaping filter for. We first simulate signals x[t] and y[t] by passing Gaussian white noise through the sh... 29 May 2010 09:11
Achieving 'equal loudness' for A/B testing
I'm trying to A/B test a filter, and I'd like to control for the human preference for louder signals. Is there a standard way to do this? Right now I'm normalizing to the avg RMS level of the a-weighted signal. I'm hoping to achieve two signals with the same subjective loudness so there's no 'louder signal' bias. ... 16 Jun 2010 22:07
Calc freqs of triple tuned bandpass filters?
Whats the rule of thumb for how far to detune the two outside filters for third octave bandwidth? Is the middle filter supposed to have a little less gain to flatten the passband out? Is the Q of all 3 filters the same? Do the skirts roll off at 18dB per octave? (I searched for 'triple tuned' but no hits, so I hope... 28 May 2010 00:41