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Fourier analysis and reconstruction of audio signals
http://msp.ucsd.edu/techniques/latest/book-html/node172.html
Figure 9.7 shows how to carry out a Fourier analysis, modification, and reconstruction of an audio signal. The first step is to divide the signal into windows , which are segments of the signal, of samples each, usually with some overlap. Each window is then shaped by multiplying it by a windowing function (Hann, for example).
Reconstruction of audio signal from Spectrogram - Signal ...
https://dsp.stackexchange.com/questions/9877/reconstruction-of-audio-signal-from-spectrogram
Note that i is the imaginary number, and x n is the reconstructed signal at the n th iteration. Start with x 0 being a random vector of length of the audio signal. For me a few iterations were sufficient to get a result that sounded alright. The absolute error to the original signal was nevertheless quite high.
Reconstruction of Audio Signal from its Absolute ...
https://dsp.stackexchange.com/questions/3406/reconstruction-of-audio-signal-from-its-absolute-spectrogram
A classic reconstruction algorithm is Griffin&Lim's, described in the paper "Signal estimation from modified short-time Fourier transform". This is an iterative algorithm, each iteration requires a full STFT / inverse STFT, which makes it quite costly.
High frequency reconstruction of audio signal based on ...
https://ieeexplore.ieee.org/document/5495813/
The quality of such audio signals can, however, be improved by reconstructing the high frequency information which was lost. In this paper the principles of audio signal production and the characteristics of the human hearing system have been used to develop a blind high frequency reconstruction method based on chaotic prediction theory.
Real-Time Lossy Audio Signal Reconstruction Using Novel ...
https://link.springer.com/article/10.1007/s11063-020-10379-5
Reconstruction of high-quality audio from reduced set of samples containing only 50% of the original audio signal. We provide reconstruction model for both periodic and aperiodic noise. The system being able to predict variable number of missing samples thus can be used in …
Compressed Sensing Reconstruction of an Audio …
http://www.accentsjournals.org/PaperDirectory/Journal/IJACR/2015/3/10.pdf
This papermainly focuses on fixing threshold value for proper reconstruction of an audio signal. An audio signal is better reconstructed for the threshold value between (-0.02 to +0.02). Various performance parameters are measured which describe exact reconstruction of …
Signal Sampling and Reconstruction — Real Time Digital ...
https://schaumont.dyn.wpi.edu/ece4703b21/lecture1.html
However, the signal that is driving the audio amplifier is passed through a lowpass filter with a cutoff frequency of approximately . This means that the sincx effect of the staircase reconstruction may roll off quicker at higher frequencies. ... Zero-order Hold is an effect in the signal reconstruction process where imperfect reconstruction is ...
A New Method of Digital Sound Reconstruction Dominik ...
https://publik.tuwien.ac.at/files/publik_294978.pdf
Digital Sound Reconstruction The basic idea of DSR is to overlap sound pulses to gener- ate a desired sound pressure signal. The amplitude of the sound pulses corresponds to the actual value of the signal which should be generated, much like the classic princi- ple of discretization.
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