Mercurial > hg > camir-aes2014

annotate core/magnatagatune/MTTMixedFeatureSlaney08GenreBasicSm.m @ 0:e9a9cd732c1e tip

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first hg version after svn
author wolffd
date Tue, 10 Feb 2015 15:05:51 +0000
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wolffd@0 1 classdef MTTMixedFeatureSlaney08GenreBasicSm < MTTAudioFeature & handle
wolffd@0 2 % ---
wolffd@0 3 %
wolffd@0 4 %
wolffd@0 5 % The usual worklow for these features constist of three steps
wolffd@0 6 % 1. extract: extracts the basic single-file dependent features
wolffd@0 7 % 2. define_global_transform: calculates the global feature
wolffd@0 8 % transformation parameters
wolffd@0 9 % 3. finalise: applies the common transformations to a specific feature
wolffd@0 10 % ---
wolffd@0 11
wolffd@0 12 properties(Constant = true)
wolffd@0 13
wolffd@0 14 % svn hook
wolffd@0 15 my_revision = str2double(substr('$Rev$', 5, -1));
wolffd@0 16 end
wolffd@0 17
wolffd@0 18 properties
wolffd@0 19 % ---
wolffd@0 20 % Set default parameters
wolffd@0 21 % ---
wolffd@0 22 my_params = MTTAudioFeature.inherited_params(...
wolffd@0 23 'MTTMixedFeatureGenreBasicSm', ...
wolffd@0 24 ... % ---
wolffd@0 25 ... % following are Slaney08 parameters
wolffd@0 26 ... % ---
wolffd@0 27 'norm_mttstats', 1, ... %
wolffd@0 28 'whiten_mttstats', 0, ... % NOTE: whitening as in slaney??
wolffd@0 29 'select_mttstats', 1 ...% select certain features
wolffd@0 30 );
wolffd@0 31 end
wolffd@0 32
wolffd@0 33 % ---
wolffd@0 34 % member functions
wolffd@0 35 % ---
wolffd@0 36 methods
wolffd@0 37
wolffd@0 38 % ---
wolffd@0 39 % constructor: pointer to feature in database
wolffd@0 40 % ---
wolffd@0 41 function feature = MTTMixedFeatureSlaney08GenreBasicSm(varargin)
wolffd@0 42
wolffd@0 43 feature = feature@MTTAudioFeature(varargin{:});
wolffd@0 44 end
wolffd@0 45
wolffd@0 46 % ---
wolffd@0 47 % extract feature data by combining genre adn basicsm features
wolffd@0 48 % ---
wolffd@0 49 function data = extract(feature, clip)
wolffd@0 50
wolffd@0 51 % ---
wolffd@0 52 % get MTTMixedFeatureGenreBasicSm this includes possible
wolffd@0 53 % local normalisations
wolffd@0 54 % ---
wolffd@0 55 data.genrebasicsm = clip.features('MTTMixedFeatureGenreBasicSm',feature.my_params);
wolffd@0 56
wolffd@0 57 % ---
wolffd@0 58 % get genre tag features
wolffd@0 59 % ---
wolffd@0 60
wolffd@0 61 data.mttstats = clip.features('MTTAudioFeatureSlaney08',feature.my_params);
wolffd@0 62
wolffd@0 63
wolffd@0 64 % prepare field for final features
wolffd@0 65 data.final.vector = [];
wolffd@0 66 data.final.vector_info = struct();
wolffd@0 67 data.final.dim = 0;
wolffd@0 68
wolffd@0 69 % save info data
wolffd@0 70 data.info.type = class(feature);
wolffd@0 71 data.info.owner_id = clip.id;
wolffd@0 72 data.info.creatorrev = feature.my_revision;
wolffd@0 73
wolffd@0 74 % save parameters
wolffd@0 75 data.info.params = feature.my_params;
wolffd@0 76 end
wolffd@0 77
wolffd@0 78 function define_global_transform(features)
wolffd@0 79 % calculate and set normalization factors from the group of
wolffd@0 80 % input features. These features will be set for the full database
wolffd@0 81
wolffd@0 82 if numel(features) == 1
wolffd@0 83 error ('Insert feature array for this method');
wolffd@0 84 end
wolffd@0 85
wolffd@0 86 % ---
wolffd@0 87 % We collect all the relevant genrebasicsm
wolffd@0 88 % features and get the transform on this basis.
wolffd@0 89 % ---
wolffd@0 90 for i = 1:numel(features)
wolffd@0 91 genrebasicsm(i) = features(i).data.genrebasicsm;
wolffd@0 92 end
wolffd@0 93
wolffd@0 94 % call the features own transsform function
wolffd@0 95 genrebasicsm.define_global_transform();
wolffd@0 96
wolffd@0 97 % ---
wolffd@0 98 % We collect all the relevant mttstats
wolffd@0 99 % features and get the transform on this basis.
wolffd@0 100 % ---
wolffd@0 101 for i = 1:numel(features)
wolffd@0 102 mttstats(i) = features(i).data.mttstats;
wolffd@0 103 end
wolffd@0 104
wolffd@0 105 % call the features own transsform function
wolffd@0 106 mttstats.define_global_transform();
wolffd@0 107
wolffd@0 108 % ---
wolffd@0 109 % set common feature values for mixed features
wolffd@0 110 % ---
wolffd@0 111 features(1).my_db.set_common([1]); %trivial common
wolffd@0 112 end
wolffd@0 113
wolffd@0 114
wolffd@0 115 function finalise(feature)
wolffd@0 116 % applies a final transformation and collects the
wolffd@0 117 % information of this feature within a single vector
wolffd@0 118 % see info for types in specific dimensions
wolffd@0 119
wolffd@0 120 for i = 1:numel(feature)
wolffd@0 121
wolffd@0 122 % check for neccesary parameters
wolffd@0 123 if isempty(feature(i).my_db.commondb)
wolffd@0 124
wolffd@0 125 error('Define the global transformation first');
wolffd@0 126 end
wolffd@0 127
wolffd@0 128 % ---
wolffd@0 129 % final data assembly
wolffd@0 130 % ---
wolffd@0 131 % concatenate vectors
wolffd@0 132 feature(i).data.final.vector = ...
wolffd@0 133 [feature(i).data.genrebasicsm.vector() ;...
wolffd@0 134 feature(i).data.mttstats.vector()];
wolffd@0 135
wolffd@0 136 % add up feature dimensions
wolffd@0 137 feature(i).data.final.dim = feature(i).data.genrebasicsm.dim...
wolffd@0 138 + feature(i).data.mttstats.dim;
wolffd@0 139
wolffd@0 140 % concatenate labels
wolffd@0 141 lbl1 = feature(i).data.genrebasicsm.labels();
wolffd@0 142 lbl2 = feature(i).data.mttstats.labels();
wolffd@0 143 feature(i).data.final.vector_info.labels = ...
wolffd@0 144 {lbl1{:}, lbl2{:}};
wolffd@0 145 end
wolffd@0 146 end
wolffd@0 147
wolffd@0 148 % ---
wolffd@0 149 % destructor: do we really want to remove this
wolffd@0 150 % from the database? No, but
wolffd@0 151 % TODO: create marker for unused objects in db, and a cleanup
wolffd@0 152 % function
wolffd@0 153 % ---
wolffd@0 154 function delete(feature)
wolffd@0 155
wolffd@0 156 end
wolffd@0 157
wolffd@0 158 end
wolffd@0 159 end