Transcendental Information Based Triphone Model Tying Structure Adaptation Strategy

A Transcendental Information Based (TIB) triphone model tying structure adaptation strategy is delivered, and this strategy can improve the triphone model tying structure to suit the target co-pronunciation features with small amount of adaptation data. The TIB triphone model tying structure adaptation strategy uses the baseline acoustic models triphone model tying result as the transcendental model clustering center, with the adaptation data alignment by the baseline acoustic model, re-estimate the TIB triphone model clustering center and model tying structure recursively under maximum likelihood principle. The experiments show that the TIB triphone model tying structure adaptation strategy can improve the triphone model tying structure with only 2 hours adaptation corpus, and in the experiment of English acoustic model for Chinese speakers, the TIB strategy will increase the recognition accuracy rate from 74.59% to 83.63%.