These experiments showed that the system could recognize triadic harmonic events, and to some extent more complex chords such as sevenths and ninths, at the signal level. References Leman, Marc. Music and Schema Theory , Springer-Verlag. Acoustic mismatches between the test speakers and the statistical model result in considerable degradation of recognition performance. In this work, we apply linear transformation to the cepstral space, which can be viewed as the Fourier dual of the log spectral space.
Gaussian mixture is the most popular distribution used for modeling speech segments.
If we restrict the feature transformation to be that of convolution , which is equivalent to filtering in the log spectrum domain, the resulting normalization matrix exhibits a Toeplitz structure, simplifying the parameter estimation. Applying the optimal linear transformation to the test feature space yielded in considerable improvements over the baseline system in frame-based vowel recognition using data from 23 British speakers, and in isolated digit recognition using the TI digits database, consisting of over 300 speakers. IEEE Workshop on Applications of Signal Processing to Audio and Acoustics , October 1999. All Rights Reserved.