Extracting phonological chunks based on piecewise linear segment lattices
نویسندگان
چکیده
The task of our research is to form phone-like models and a phoneme-like set from spoken word samples without using any transcriptions except for the lexical identi cation of each word in a vocabulary. This framework is derived from two motivations: 1) automatic design of optimal speech recognition units and structures of phone models, and 2) multi-lingual speech recognition based on languageindependent intermediate phonetic codes. The procedure consists of two steps: 1) constructing a VQ codebook of sub-phonetic segments from speech samples, and 2) extracting phonological chunks from sequences of the codes. Segment model is represented with \piecewise linear segment lattice" model, which is a lattice structure of segments, each of which is represented as regression coeÆcients of feature vectors within the segment. Phonological chunks are extracted with a criterion based on KullbackLeibler divergence between the distribution of individual VQ codes. The recognition rate yields approximately 90% on the 1542 words task with 128 VQ codes.
منابع مشابه
Organizing phone models based on piecewise linear segment lattices of speech samples
Aiming at robust speech recognition, we have proposed a framework for “phonological concept formation,” which is the task of acquiring an efficient representation of phonemes from spoken word samples without using any transcriptions except for the lexical classification of the words. In order to implement this task, we propose the “piecewise linear segment lattice (PLSL)” model for phoneme repr...
متن کاملImage Registration in Range Using a Constrained Piecewise Linear Model: Analysis and New Results
An analysis of the conditions under which range registration was previously performed using a piecewise linear approximation to a comparametric function is presented. Stricter constraints are introduced which result in a better estimation of the exposure difference between two images of the same scene. Specifically, a positive slope constraint is imposed on each linear segment. Also, the knot l...
متن کاملA new algorithm for solving Van der Pol equation based on piecewise spectral Adomian decomposition method
In this article, a new method is introduced to give approximate solution to Van der Pol equation. The proposed method is based on the combination of two different methods, the spectral Adomian decomposition method (SADM) and piecewise method, called the piecewise Adomian decomposition method (PSADM). The numerical results obtained from the proposed method show that this method is an...
متن کاملHybrid model predictive control of a nonlinear three-tank system based on the proposed compact form of piecewise affine model
In this paper, a predictive control based on the proposed hybrid model is designed to control the fluid height in a three-tank system with nonlinear dynamics whose operating mode depends on the instantaneous amount of system states. The use of nonlinear hybrid model in predictive control leads to a problem of mixed integer nonlinear programming (MINLP) which is very complex and time consuming t...
متن کاملPlanelet Transform: A New Geometrical Wavelet for Compression of Kinect-like Depth Images
With the advent of cheap indoor RGB-D sensors, proper representation of piecewise planar depth images is crucial toward an effective compression method. Although there exist geometrical wavelets for optimal representation of piecewise constant and piecewise linear images (i.e. wedgelets and platelets), an adaptation to piecewise linear fractional functions which correspond to depth variation ov...
متن کامل