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mightbesimon · May 3, 2020 · aa4e5f7 · aa4e5f7
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diff --git a/README.md b/README.md
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+# Digital Signal Processing #
+
+> ELECTENG 733  
+> University of Auckland  
+> Simon Shan
+
+**Emotion recognition** - *Practical Implementation Assignment 2*  
+May 2020
+
+- [x] angry
+- [x] excited
+- [x] happy
+- [x] sad
+
+### Description ###
+
+description goes here
+
+https://www.isca-speech.org/archive/Interspeech_2018/pdfs/1349.pdf
+
+### Requirements ###
+
+MATLAB
+
+run main.m
+
+## Authors ##
+
+- **simon** - *<del>buy my merch</del> hire me pls* - [mightbesimon](https://github.com/mightbesimon)
+
+## License ##
+
+MIT
+
+## Acknowledgments ##
+
+- **these are just my sample codes, if you misuse them its not my problem**
+- not actually in ELECTENG 733, just felt like doing the project for fun
diff --git a/README.txt b/README.txt
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+convert to 20ms frames - load_data.m
+
+
+
+data preperation and feature extraction done for all 60 audio signals (together), but traning (i.e. the mle function) is only done on the first 48, classification is done on the last 12 (using the extracted features)
diff --git a/divide_signal.m b/divide_signal.m
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+function [frames] = divide_signal(signal)
+
+fs       = 44100;		% value specified in documentation
+duration = 0.020; 		% value specified in documentation
+spf = fs * duration;	% sameples per frame
+
+num_frames = fix(numel(signal)/spf);
+
+frames = reshape(signal(1:num_frames*spf), [num_frames, spf]);
+						% reshapes the signal from [num_sample x 1]
+						% to 2D matrix [num_frames x sample_per_frame]
+						% each row is 1 frame (20ms)
+
+end
diff --git a/extract_features.m b/extract_features.m
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+%==== FEATURE EXTRACTION ====%
+
+% short-time energy
+ste_male_angry   = cellfun(@short_time_energy,  audio_male_angry,   'UniformOutput', false);
+ste_male_excited = cellfun(@short_time_energy,  audio_male_excited, 'UniformOutput', false);
+ste_male_happy   = cellfun(@short_time_energy,  audio_male_happy,   'UniformOutput', false);
+ste_male_sad     = cellfun(@short_time_energy,  audio_male_sad,     'UniformOutput', false);
+
+% zero-crossing rate
+zcr_male_angry     = cellfun(@zero_crossing_rate, audio_male_angry,   'UniformOutput', false);
+zcr_male_excited   = cellfun(@zero_crossing_rate, audio_male_excited, 'UniformOutput', false);
+zcr_male_happy     = cellfun(@zero_crossing_rate, audio_male_happy,   'UniformOutput', false);
+zcr_male_sad       = cellfun(@zero_crossing_rate, audio_male_sad,     'UniformOutput', false);
+
+% pitch
+
+
+% spectral energy
+
+
+% average short-time energy
+ave_ste_male_angry   = cellfun(@mean, ste_male_angry  );
+ave_ste_male_excited = cellfun(@mean, ste_male_excited);
+ave_ste_male_happy   = cellfun(@mean, ste_male_happy  );
+ave_ste_male_sad     = cellfun(@mean, ste_male_sad    );
+
+% average zero-crossing rate
+ave_zcr_male_angry   = cellfun(@mean, zcr_male_angry  );
+ave_zcr_male_excited = cellfun(@mean, zcr_male_excited);
+ave_zcr_male_happy   = cellfun(@mean, zcr_male_happy  );
+ave_zcr_male_sad     = cellfun(@mean, zcr_male_sad    );
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diff --git a/female1/female1_happy_7a_1.wav b/female1/female1_happy_7a_1.wav
diff --git a/female1/female1_happy_7a_2.wav b/female1/female1_happy_7a_2.wav
diff --git a/female1/female1_happy_7b_1.wav b/female1/female1_happy_7b_1.wav
diff --git a/female1/female1_happy_7b_2.wav b/female1/female1_happy_7b_2.wav
diff --git a/female1/female1_happy_8a_1.wav b/female1/female1_happy_8a_1.wav
diff --git a/female1/female1_happy_8a_2.wav b/female1/female1_happy_8a_2.wav
diff --git a/female1/female1_happy_8b_1.wav b/female1/female1_happy_8b_1.wav
diff --git a/female1/female1_happy_8b_2.wav b/female1/female1_happy_8b_2.wav
diff --git a/female1/female1_happy_9a_1.wav b/female1/female1_happy_9a_1.wav
diff --git a/female1/female1_happy_9a_2.wav b/female1/female1_happy_9a_2.wav
diff --git a/female1/female1_happy_9b_1.wav b/female1/female1_happy_9b_1.wav
diff --git a/female1/female1_happy_9b_2.wav b/female1/female1_happy_9b_2.wav
diff --git a/female1/female1_sad_10a_1.wav b/female1/female1_sad_10a_1.wav
diff --git a/female1/female1_sad_10a_2.wav b/female1/female1_sad_10a_2.wav
diff --git a/female1/female1_sad_10b_1.wav b/female1/female1_sad_10b_1.wav
diff --git a/female1/female1_sad_10b_2.wav b/female1/female1_sad_10b_2.wav
diff --git a/female1/female1_sad_11a_1.wav b/female1/female1_sad_11a_1.wav
diff --git a/female1/female1_sad_11a_2.wav b/female1/female1_sad_11a_2.wav
diff --git a/female1/female1_sad_11b_1.wav b/female1/female1_sad_11b_1.wav
diff --git a/female1/female1_sad_11b_2.wav b/female1/female1_sad_11b_2.wav
diff --git a/female1/female1_sad_12a_1.wav b/female1/female1_sad_12a_1.wav
diff --git a/female1/female1_sad_12a_2.wav b/female1/female1_sad_12a_2.wav
diff --git a/female1/female1_sad_12b_1.wav b/female1/female1_sad_12b_1.wav
diff --git a/female1/female1_sad_12b_2.wav b/female1/female1_sad_12b_2.wav
diff --git a/female1/female1_sad_13a_1.wav b/female1/female1_sad_13a_1.wav
diff --git a/female1/female1_sad_13a_2.wav b/female1/female1_sad_13a_2.wav
diff --git a/female1/female1_sad_13b_1.wav b/female1/female1_sad_13b_1.wav
diff --git a/female1/female1_sad_13b_2.wav b/female1/female1_sad_13b_2.wav
diff --git a/female1/female1_sad_14a_1.wav b/female1/female1_sad_14a_1.wav
diff --git a/female1/female1_sad_14a_2.wav b/female1/female1_sad_14a_2.wav
diff --git a/female1/female1_sad_14b_1.wav b/female1/female1_sad_14b_1.wav
diff --git a/female1/female1_sad_14b_2.wav b/female1/female1_sad_14b_2.wav
diff --git a/female1/female1_sad_15a_1.wav b/female1/female1_sad_15a_1.wav
diff --git a/female1/female1_sad_15a_2.wav b/female1/female1_sad_15a_2.wav
diff --git a/female1/female1_sad_15b_1.wav b/female1/female1_sad_15b_1.wav
diff --git a/female1/female1_sad_15b_2.wav b/female1/female1_sad_15b_2.wav
diff --git a/female1/female1_sad_1a_1.wav b/female1/female1_sad_1a_1.wav
diff --git a/female1/female1_sad_1a_2.wav b/female1/female1_sad_1a_2.wav
diff --git a/female1/female1_sad_1b_1.wav b/female1/female1_sad_1b_1.wav
diff --git a/female1/female1_sad_1b_2.wav b/female1/female1_sad_1b_2.wav
diff --git a/female1/female1_sad_2a_1.wav b/female1/female1_sad_2a_1.wav
diff --git a/female1/female1_sad_2a_2.wav b/female1/female1_sad_2a_2.wav
diff --git a/female1/female1_sad_2b_1.wav b/female1/female1_sad_2b_1.wav
diff --git a/female1/female1_sad_2b_2.wav b/female1/female1_sad_2b_2.wav
diff --git a/female1/female1_sad_3a_1.wav b/female1/female1_sad_3a_1.wav
diff --git a/female1/female1_sad_3a_2.wav b/female1/female1_sad_3a_2.wav
diff --git a/female1/female1_sad_3b_1.wav b/female1/female1_sad_3b_1.wav
diff --git a/female1/female1_sad_3b_2.wav b/female1/female1_sad_3b_2.wav
diff --git a/female1/female1_sad_4a_1.wav b/female1/female1_sad_4a_1.wav
diff --git a/female1/female1_sad_4a_2.wav b/female1/female1_sad_4a_2.wav
diff --git a/female1/female1_sad_4b_1.wav b/female1/female1_sad_4b_1.wav
diff --git a/female1/female1_sad_4b_2.wav b/female1/female1_sad_4b_2.wav
diff --git a/female1/female1_sad_5a_1.wav b/female1/female1_sad_5a_1.wav
diff --git a/female1/female1_sad_5a_2.wav b/female1/female1_sad_5a_2.wav
diff --git a/female1/female1_sad_5b_1.wav b/female1/female1_sad_5b_1.wav
diff --git a/female1/female1_sad_5b_2.wav b/female1/female1_sad_5b_2.wav
diff --git a/female1/female1_sad_6a_1.wav b/female1/female1_sad_6a_1.wav
diff --git a/female1/female1_sad_6a_2.wav b/female1/female1_sad_6a_2.wav
diff --git a/female1/female1_sad_6b_1.wav b/female1/female1_sad_6b_1.wav
diff --git a/female1/female1_sad_6b_2.wav b/female1/female1_sad_6b_2.wav
diff --git a/female1/female1_sad_7a_1.wav b/female1/female1_sad_7a_1.wav
diff --git a/female1/female1_sad_7a_2.wav b/female1/female1_sad_7a_2.wav
diff --git a/female1/female1_sad_7b_1.wav b/female1/female1_sad_7b_1.wav
diff --git a/female1/female1_sad_7b_2.wav b/female1/female1_sad_7b_2.wav
diff --git a/female1/female1_sad_8a_1.wav b/female1/female1_sad_8a_1.wav
diff --git a/female1/female1_sad_8a_2.wav b/female1/female1_sad_8a_2.wav
diff --git a/female1/female1_sad_8b_1.wav b/female1/female1_sad_8b_1.wav
diff --git a/female1/female1_sad_8b_2.wav b/female1/female1_sad_8b_2.wav
diff --git a/female1/female1_sad_9a_1.wav b/female1/female1_sad_9a_1.wav
diff --git a/female1/female1_sad_9a_2.wav b/female1/female1_sad_9a_2.wav
diff --git a/female1/female1_sad_9b_1.wav b/female1/female1_sad_9b_1.wav
diff --git a/female1/female1_sad_9b_2.wav b/female1/female1_sad_9b_2.wav
diff --git a/load_audio.m b/load_audio.m
@@ -0,0 +1,34 @@
+% LOAD AUDIO FILES
+%
+% read the audio files and
+% convert into 20ms frames
+
+
+% define directories
+dirAudio  = pwd;							% dir path to male/female folders
+dirMale   = fullfile(dirAudio, 'male2');	% male folder
+dirFemale = fullfile(dirAudio, 'female1');	% female folder
+
+
+% read audio files
+audio_male_angry   = read_audio(dirMale, 'angry'  );
+audio_male_excited = read_audio(dirMale, 'excited');
+audio_male_happy   = read_audio(dirMale, 'happy'  );
+audio_male_sad     = read_audio(dirMale, 'sad'    );
+
+% audio_female_angry   = read_audio(dirFemale, 'angry'  );
+% audio_female_excited = read_audio(dirFemale, 'excited');
+% audio_female_happy   = read_audio(dirFemale, 'happy'  );
+% audio_female_sad     = read_audio(dirFemale, 'sad'    );
+
+
+% convert signals to frames of 20ms
+audio_male_angry    = cellfun(@divide_signal, audio_male_angry,   'UniformOutput', false);
+audio_male_excited  = cellfun(@divide_signal, audio_male_excited, 'UniformOutput', false);
+audio_male_happy    = cellfun(@divide_signal, audio_male_happy,   'UniformOutput', false);
+audio_male_sad      = cellfun(@divide_signal, audio_male_sad,     'UniformOutput', false);
+
+% audio_female_angry    = cellfun(@divide_signal, audio_female_angry,   'UniformOutput', false);
+% audio_female_excited  = cellfun(@divide_signal, audio_female_excited, 'UniformOutput', false);
+% audio_female_happy    = cellfun(@divide_signal, audio_female_happy,   'UniformOutput', false);
+% audio_female_sad      = cellfun(@divide_signal, audio_female_sad,     'UniformOutput', false);
diff --git a/ma1.png b/ma1.png
diff --git a/main.m b/main.m
@@ -0,0 +1,44 @@
+% ELECTENG 733
+% University of Auckland
+%
+% Emotion Recognition
+% Digital Signal Processing
+% Practical Implementation Assignment 2
+% May 2020
+%
+% by simon
+
+
+% housekeeping
+ close all 
+fclose all
+clear; clc
+
+% constannts
+emotions = {
+	'angry',
+	'excited',
+	'happy',
+	'sad',
+}
+
+
+%==== TRAINING STAGE ====%
+
+load_audio			% LOAD AUDIO FILES
+					% convert into 20ms frames
+
+extract_features	% EXTRACT AUDIO FEATURES
+					%	- short-time energy
+					%	- zero-crossing rate
+					%	- pitch
+					%	- spetral energy
+
+train_model			% TRAIN ESTIMATION MODEL
+					% maximum likelihood estimation
+
+
+%==== TESTING STAGE ====%
+
+
+
diff --git a/male2/male2_angry_10a_1.wav b/male2/male2_angry_10a_1.wav
diff --git a/male2/male2_angry_10a_2.wav b/male2/male2_angry_10a_2.wav
diff --git a/male2/male2_angry_10b_1.wav b/male2/male2_angry_10b_1.wav
diff --git a/male2/male2_angry_10b_2.wav b/male2/male2_angry_10b_2.wav
diff --git a/male2/male2_angry_11a_1.wav b/male2/male2_angry_11a_1.wav
diff --git a/male2/male2_angry_11a_2.wav b/male2/male2_angry_11a_2.wav
diff --git a/male2/male2_angry_11b_1.wav b/male2/male2_angry_11b_1.wav
diff --git a/male2/male2_angry_11b_2.wav b/male2/male2_angry_11b_2.wav
diff --git a/male2/male2_angry_12a_1.wav b/male2/male2_angry_12a_1.wav
diff --git a/male2/male2_angry_12a_2.wav b/male2/male2_angry_12a_2.wav
diff --git a/male2/male2_angry_12b_1.wav b/male2/male2_angry_12b_1.wav
diff --git a/male2/male2_angry_12b_2.wav b/male2/male2_angry_12b_2.wav
diff --git a/male2/male2_angry_13a_1.wav b/male2/male2_angry_13a_1.wav
diff --git a/male2/male2_angry_13a_2.wav b/male2/male2_angry_13a_2.wav
diff --git a/male2/male2_angry_13b_1.wav b/male2/male2_angry_13b_1.wav
diff --git a/male2/male2_angry_13b_2.wav b/male2/male2_angry_13b_2.wav
diff --git a/male2/male2_angry_14a_1.wav b/male2/male2_angry_14a_1.wav
diff --git a/male2/male2_angry_14a_2.wav b/male2/male2_angry_14a_2.wav
diff --git a/male2/male2_angry_14b_1.wav b/male2/male2_angry_14b_1.wav
diff --git a/male2/male2_angry_14b_2.wav b/male2/male2_angry_14b_2.wav
diff --git a/male2/male2_angry_15a_1.wav b/male2/male2_angry_15a_1.wav
diff --git a/male2/male2_angry_15a_2.wav b/male2/male2_angry_15a_2.wav
diff --git a/male2/male2_angry_15b_1.wav b/male2/male2_angry_15b_1.wav
diff --git a/male2/male2_angry_15b_2.wav b/male2/male2_angry_15b_2.wav
diff --git a/male2/male2_angry_1a_1.wav b/male2/male2_angry_1a_1.wav
diff --git a/male2/male2_angry_1a_2.wav b/male2/male2_angry_1a_2.wav
diff --git a/male2/male2_angry_1b_1.wav b/male2/male2_angry_1b_1.wav
diff --git a/male2/male2_angry_1b_2.wav b/male2/male2_angry_1b_2.wav
diff --git a/male2/male2_angry_2a_1.wav b/male2/male2_angry_2a_1.wav
diff --git a/male2/male2_angry_2a_2.wav b/male2/male2_angry_2a_2.wav
diff --git a/male2/male2_angry_2b_1.wav b/male2/male2_angry_2b_1.wav
diff --git a/male2/male2_angry_2b_2.wav b/male2/male2_angry_2b_2.wav
diff --git a/male2/male2_angry_3a_1.wav b/male2/male2_angry_3a_1.wav
diff --git a/male2/male2_angry_3a_2.wav b/male2/male2_angry_3a_2.wav
diff --git a/male2/male2_angry_3b_1.wav b/male2/male2_angry_3b_1.wav
diff --git a/male2/male2_angry_3b_2.wav b/male2/male2_angry_3b_2.wav
diff --git a/male2/male2_angry_4a_1.wav b/male2/male2_angry_4a_1.wav
diff --git a/male2/male2_angry_4a_2.wav b/male2/male2_angry_4a_2.wav
diff --git a/male2/male2_angry_4b_1.wav b/male2/male2_angry_4b_1.wav
diff --git a/male2/male2_angry_4b_2.wav b/male2/male2_angry_4b_2.wav
diff --git a/male2/male2_angry_5a_1.wav b/male2/male2_angry_5a_1.wav
diff --git a/male2/male2_angry_5a_2.wav b/male2/male2_angry_5a_2.wav
diff --git a/male2/male2_angry_5b_1.wav b/male2/male2_angry_5b_1.wav
diff --git a/male2/male2_angry_5b_2.wav b/male2/male2_angry_5b_2.wav
diff --git a/male2/male2_angry_6a_1.wav b/male2/male2_angry_6a_1.wav
diff --git a/male2/male2_angry_6a_2.wav b/male2/male2_angry_6a_2.wav
diff --git a/male2/male2_angry_6b_1.wav b/male2/male2_angry_6b_1.wav
diff --git a/male2/male2_angry_6b_2.wav b/male2/male2_angry_6b_2.wav
diff --git a/male2/male2_angry_7a_1.wav b/male2/male2_angry_7a_1.wav
diff --git a/male2/male2_angry_7a_2.wav b/male2/male2_angry_7a_2.wav
diff --git a/male2/male2_angry_7b_1.wav b/male2/male2_angry_7b_1.wav
diff --git a/male2/male2_angry_7b_2.wav b/male2/male2_angry_7b_2.wav
diff --git a/male2/male2_angry_8a_1.wav b/male2/male2_angry_8a_1.wav
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,5 @@
		convert to 20ms frames - load_data.m



		data preperation and feature extraction done for all 60 audio signals (together), but traning (i.e. the mle function) is only done on the first 48, classification is done on the last 12 (using the extracted features)