By Sakriani Sakti, Konstantin Markov, Satoshi Nakamura, Wolfgang Minker
Incorporating wisdom assets into Statistical Speech Recognition bargains ideas for boosting the robustness of a statistical computerized speech reputation (ASR) process by way of incorporating numerous extra wisdom resources whereas retaining the learning and popularity attempt possible.
The authors supply an effective normal framework for incorporating wisdom resources into state of the art statistical ASR structures. This framework, generally known as GFIKS (graphical framework to include extra wisdom sources), was once designed by using the idea that of the Bayesian community (BN) framework. This framework permits probabilistic relationships between varied info resources to be discovered, several types of wisdom resources to be integrated, and a probabilistic functionality of the version to be formulated.
Incorporating wisdom assets into Statistical Speech Recognition demonstrates how the statistical speech reputation process may possibly contain additional info resources through the use of GFIKS at assorted degrees of ASR. The incorporation of varied wisdom resources, together with heritage noises, accessory, gender and huge phonetic wisdom details, in modeling is mentioned theoretically and analyzed experimentally.
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Additional info for Incorporating Knowledge Sources into Statistical Speech Recognition
Their experiments revealed that it could achieved higher recognition performance than the single model. Other methods have been use to adapt acoustic models to particular environmental conditions. , 1993), and MLLR (Leggetter and Woodland, 1995). However, these methods tend to require a considerable amount of noise-sample training data and too much computation to allow real-time monitoring of instantaneous changes in the noise spectrum. A study by Sagayama et al. (1997) proposed a fast adaptation method using a Jacobian matrix.
2002) and Riley et al. (1997) proposed to compile widecontext-dependent models into a network of Weighted Finite State Transducers (WFST), in order to completely decouple the decoding process from the wide context. However, when higher-order models are used, difficulties lie in the compilation itself. The work by Schuster and Hori (2005) was thus conducted as an attempt to simplify the compilation method. Furthermore, the incorporation of higher-level linguistic information related to syllable structure and word position, using decision-tree-based acoustic modeling, has also been proposed by Ostendorf (2000), FoslerLussier et al.
Here, instead of partitioning the space into discrete clusters, the continuous observation space is modeled using Gaussian multivariate densities, which are in turn weighted and added to compute the emission likelihoods of each of the states or the state output probability. 19) and parameterized by the mean vector (representing the mean of the component as a d-dimensional vector) and by the covariance matrix (describing the metric of the space spanned by d-dimension). 3. q1 q2 q3 HMM state Mixtue weight w jk Continuous Gaussian component Fig.