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Create lineat.m #1

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46 changes: 46 additions & 0 deletions Audio/Linear Interpolation/lineat.m
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%carregando pacotes
pkg load signal
close all
clear all

% Abrindo arquivo de audio
%Fs=8000;
[audio Fs]=wavread('/home/lucas/Documentos/project-octave/Resgiter.wav');
figure(1);
plot(audio,'b') %Plota grafico do audio original
hold;
grid;
xlabel('Tempo');
ylabel('Amplitude');
title('Comparação entre amostras');

%------------------------------------Downsampling-----------------------------------
n=2; %Fator da taxa de amostragem
audio_down = downsample(audio,n); %Diminui o valor da taxa de amostragem da matriz
plot(audio_down, 'r'); %Plota grafico do audio diminuido

%------------------------------------Interolacao------------------------------------
audio_inter=interp2(audio_down, 'linear'); %Realiza a filtragem com o filtro linear

figure(2);
hold
grid
xlabel('Tempo');
ylabel('Amplitude');
title('Audio Filtrado x Audio Diminuído');
plot(audio_inter,'g')
plot(audio_down,'r')

figure(3);
hold;
grid;
xlabel('Tempo');
ylabel('Amplitude');
title('três audios');
plot(audio,'r')
plot(audio_down,'g:*')
plot(audio_inter,'b:.')

sound(audio, Fs)
sound(audio_down, Fs)
sound(audio_inter,Fs)