This paper evaluates the performance of a sparse representation-based (SR) classifier for a limited data, bird phrase classification task. The evaluation database contains 32 unique phrases segmented from songs of the Cassinfs Vireo (Vireo cassinii). Spectrographic features were extracted from each phrase-segmented audio file, followed by dimension reduction using principal component analysis (PCA). A performance comparison to the nearest subspace (NS) and support vector machine (SVM) classifiers was conducted. The SR classifier outperforms the NS and SVM classifiers, with a maximum absolute improvement of 3.4% observed when there are only four tokens per phrase in the training set.
Index Terms: bird phrase classification, limited data, sparse representation, L1 minimization.
Bibliographic reference. Tan, Lee Ngee / Kaewtip, Kantapon / Cody, Martin L. / Taylor, Charles E. / Alwan, Abeer (2012): "Evaluation of a sparse representation-based classifier for bird phrase classification under limited data conditions", In INTERSPEECH-2012, 2522-2525.