Hi,
The compression ratio is a measure of how much the data has been reduced in size after applying a compression algorithm. In this case, I assumed a simple compression model where the original signal is represented by LPC (Linear Predictive Coding) coefficients. Here's the complete code:
%MAIN BODY
clear all;
clc;
% TAKING INPUT WAVEFILE
inpfilenm = 'a1.wav';
[y, Fs] = audioread(inpfilenm);
% LENGTH (IN SEC) OF INPUT WAVEFILE
t = length(y) / Fs;
sprintf('Processing the wavefile "%s"', inpfilenm)
sprintf('The wavefile is %3.2f seconds long', t)
% THE ALGORITHM STARTS HERE
M = 10; % prediction order
[aCoeff, pitch_plot, voiced, gain] = f_ENCODER(y, Fs, M); % pitch_plot is pitch periods
synth_speech = f_DECODER(aCoeff, pitch_plot, voiced, gain);
% CALCULATING COMPRESSION RATIO
original_size = numel(y) * 2 * 8; % 16 bits per sample
encoded_size = numel(aCoeff) * 8; % assuming each coefficient is 64 bits
compression_ratio = original_size / encoded_size;
disp(['Compression Ratio: ', num2str(compression_ratio)]);
The compression ratio is then displayed using "disp(['Compression Ratio: ', num2str(compression_ratio)]);".
Hope this helps!
