MATLAB: DECODING OF DIAL TONE SIGNAL

digital signal processingdtmftelephone dial tones

Hi Everyone, i am now trying to do decoding of dial tone signal at sampling rate of 1kHz and then want to record which number have been dialled . Please kindly help me how to start with this. I am not friendly with this. So help me.

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See How can i detect frequency of dtmf tone (.wav )file and DFT Estimation with the Goertzel Algorithm for inspiration!

Related Solutions

MATLAB: I want to plot frequency vs time from the sound data(i.e. column data). I am not able to do it. Please please help. the specgramdemo function when run give at what time what frequency is present, but i want that it should return mtrx frequency vs t

spectrogram returns matrices containing the complex-valued short-time Fourier transform and the short-time periodograms.

See the help for spectrogram for examples.

MATLAB: Sinusoid with amplitude , frequency, samples, and sampling frequency

Did you try this?

amplitude = 0.1;
frequency = 100 % Hz
numSamples = 100000 % samples
samplingFrequency = 22050 % Hz (per second)
numSeconds = numSamples / samplingFrequency
x = linspace(0, numSeconds, numSamples);
y = amplitude * sin(2 * pi * x * frequency);
plot(x, y, 'b-', 'LineWidth', 2);
grid on;
xlabel('X', 'FontSize', 15);
ylabel('Y', 'FontSize', 15);

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Related Solutions

MATLAB: I want to plot frequency vs time from the sound data(i.e. column data). I am not able to do it. Please please help. the specgramdemo function when run give at what time what frequency is present, but i want that it should return mtrx frequency vs t

MATLAB: Sinusoid with amplitude , frequency, samples, and sampling frequency

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