Unsupervised learning of auditory filter banks using non-negative matrix factorisation.
Alexander BertrandKris DemuynckVeronique StoutenHugo Van hammePublished in: ICASSP (2008)
Keyphrases
- filter bank
- unsupervised learning
- signal processing
- image coding
- subband
- multiscale
- supervised learning
- perfect reconstruction
- multiresolution
- subband coding
- image coding scheme
- semi supervised
- dimensionality reduction
- sparse coding
- wavelet filters
- machine learning
- object recognition
- computationally efficient
- wavelet packet
- pattern recognition
- low pass
- image processing
- discrete cosine transform
- computer vision
- reconstruction error
- visual information
- lifting scheme
- frequency domain
- model selection
- expectation maximization
- text classification
- filter responses
- sparse representation
- wavelet bases
- probabilistic model
- multiscale decomposition