Signal Processing Weekly Newsletter - Friday, November 28, 2014

Signal Processing newsletter

Top new questions this week: Find Short Clip of Audio Within Longer Clip Of Audio I need help figuring out a way to automatically synchronize two audio files that are both different recordings of the same source. More info below. This example is from a concert, where there is ... fft audio correlation   asked by Mitch Chaiet 2 votes answered by Yakku 0 votes Is magnitude information enough to reconstruct an audio signal I have used an MMSE STSA estimator to obtain the magnitude of an audio signal. The original signal is combined with white noise and I used an algorithm given in an old research paper by Ephraim and ... matlab audio ifft reconstruction   asked by Mona 2 votes answered by Matt L. 0 votes Features for speaker recognition I'm trying to create my own program for speaker identification (text-independent) and have used MFCC features for that. But result of recognition is very poor. My supervisor told me that using MFCC ... speech-processing mfcc   asked by kobra 1 vote dominant eigenvectors of an unknown matrix Do you have any idea about how we can find the principle eigenvectors of an unknown matrix ${H}$? The elements of $H$ are unknown in general. If you are familiar with channel estimation procedure in ... signal-analysis estimation compressive-sensing information-theory   asked by Hossein 1 vote Generating I/Q samples from a real signal My understanding is that if I have a real signal, it can be called as the 'I' component and its Hilbert transform can be called the 'Q' component. Due to the property of Hilbert transform, 'I' and ... hilbert   asked by Lakshay 1 vote answered by Kevin Reid 0 votes Derivative of signal with missing samples I have software that tracks an object moving (in the x-dimension only) across a video shot from a stationary camera. I need to find the velocity and acceleration of the object as functions of time. ... discrete-signals interpolation derivative   asked by matt 1 vote answered by Greg Berchin 1 vote Detecting text lines in image by means of Hough Transform In my Android App,I have to detect text lines in images.I want to use Hough Transform to detect lines.You can see an image below: I got edges in image by canny filter,then I applied Hough ... opencv hough-transform   asked by hasanghaforian 1 vote answered by tbirdal 0 votes Greatest hits from previous weeks: What is the cut-off frequency of a moving average filter? I need to design a moving average filter that has a cut-off frequency of 7.8 Hz. I have used moving average filters before, but as far as I'm aware, the only parameter that can be fed in is the number ... moving-average   asked by CaptainProg 3 votes answered by Jason R 10 votes Best way of segmenting veins in leaves? I have done a lot of research and found out methods like adaptive thresholding , watershed etc that can be used of detecting veins in leaves . However thresholding isn't good as it introduces a lot of ... image-processing segmentation thresholding   asked by vini 22 votes answered by nikie 31 votes

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