Sumários
09 Spectrogram
31 março 2016, 12:00 • Agostinho Cláudio da Rosa
Detailed analysis of Matlab M files implementatation of STFT()( by HK
A few examples of application of stft.m
The builtin matlab function spectrogram() and specgram().
Comparison with stft()
More examples with spectrogram and specgram.
chirp function
Round functions in matlab
windowing and its effects
WFT
Lab04 Multirate Ev
29 março 2016, 14:00 • Agostinho Cláudio da Rosa
Multirate/Resampling Evaluation lab
Different sampling protocols have their own sampling frequency demands. In order to convert the
sampling to a common ground frequency or conversion between them it is necessary a conversion
process known as resampling which can be increasing the original sampling frequency known as
upsampling or reducing the sampling known as downsampling.
Industry standards like DAT, MP3 for example have specific sampling set of frequencies. Although seems
intuitive that downsampling will not pose any problem, but in reality we are facing the aliasing
phenomena which might introduce unwanted distortion and perturbations in the signal. For illustration
purpose apply direct implementation of decimation/interpolation with rational factor and compare with
the use resample and upfirdn of Matlab.
sampling to a common ground frequency or conversion between them it is necessary a conversion
process known as resampling which can be increasing the original sampling frequency known as
upsampling or reducing the sampling known as downsampling.
Industry standards like DAT, MP3 for example have specific sampling set of frequencies. Although seems
intuitive that downsampling will not pose any problem, but in reality we are facing the aliasing
phenomena which might introduce unwanted distortion and perturbations in the signal. For illustration
purpose apply direct implementation of decimation/interpolation with rational factor and compare with
the use resample and upfirdn of Matlab.
Lab04 Multirate Ev
29 março 2016, 12:30 • Agostinho Cláudio da Rosa
Multirate/Resampling Evaluation lab
Different sampling protocols have their own sampling frequency demands. In order to convert the
sampling to a common ground frequency or conversion between them it is necessary a conversion
process known as resampling which can be increasing the original sampling frequency known as
upsampling or reducing the sampling known as downsampling.
Industry standards like DAT, MP3 for example have specific sampling set of frequencies. Although seems
intuitive that downsampling will not pose any problem, but in reality we are facing the aliasing
phenomena which might introduce unwanted distortion and perturbations in the signal. For illustration
purpose apply direct implementation of decimation/interpolation with rational factor and compare with
the use resample and upfirdn of Matlab.
sampling to a common ground frequency or conversion between them it is necessary a conversion
process known as resampling which can be increasing the original sampling frequency known as
upsampling or reducing the sampling known as downsampling.
Industry standards like DAT, MP3 for example have specific sampling set of frequencies. Although seems
intuitive that downsampling will not pose any problem, but in reality we are facing the aliasing
phenomena which might introduce unwanted distortion and perturbations in the signal. For illustration
purpose apply direct implementation of decimation/interpolation with rational factor and compare with
the use resample and upfirdn of Matlab.