function SNR = demoAAC1(fNameIn, fNameOut) %Implementation of WHAT?? //TODO!! % Usage SNR = demoAAC1(fNameIn, fNameOut), where: % Inputs % - fNameIn is the filename and path of the file to encode % - fNameOut is the filename and path of the file that will be % written after decoding % % Output % - SNR is the signal to noise ration computed after successively % encoding and decoding the audio signal AACSeq1 = AACoder1(fNameIn); decodedAudio = iAACoder1(AACSeq1, fNameOut); [audioData, ~] = audioread(fNameIn); % figure() % plot(audioData(1:length(decodedAudio), 1) - decodedAudio(1:end, 1)) % figure() % plot(audioData(1:length(decodedAudio), 2) - decodedAudio(1:end, 2)) % % snr(audioData(1:length(decodedAudio), 1), audioData(1:length(decodedAudio), 1) - decodedAudio(1:end, 1)) % snr(audioData(1:length(decodedAudio), 2), audioData(1:length(decodedAudio), 2) - decodedAudio(1:end, 2)) % SNR = 10*log10((sum(audioData(1:length(decodedAudio), :)) .^ 2) ./ ... % (sum(audioData(1:length(decodedAudio), :) - decodedAudio) .^ 2)); figure() plot(audioData(1024:length(decodedAudio)-1024, 1) - decodedAudio(1024:end-1024, 1)) figure() plot(audioData(1024:length(decodedAudio)-1024, 2) - decodedAudio(1024:end-1024, 2)) snr(audioData(1024:length(decodedAudio)-1024, 1), audioData(1024:length(decodedAudio)-1024, 1) - decodedAudio(1024:end-1024, 1)) snr(audioData(1024:length(decodedAudio)-1024, 2), audioData(1024:length(decodedAudio)-1024, 2) - decodedAudio(1024:end-1024, 2)) SNR = 10*log10((var(audioData(1024:length(decodedAudio)-1024, :)) .^ 2) ./ ... (var(audioData(1024:length(decodedAudio)-1024, :) - decodedAudio(1024:end-1024, :)) .^ 2)); end