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