Practical Issues of Building Robust HMM Models Using HTK and SPHINX Systems
Juraj Kačur, Gregor Rozinaj · InTech eBooks · 2008
Even though there are many new and improved techniques for HMM modelling of speech units and different feature extraction methods, still they are usually restricted to laboratories or specific conditions. Thus most of the systems designed for large vocabulary and speaker independent tasks use the "classical" HMM modelling by CDHMM with multiple Gaussian mixtures and tied CD models of phonemes.