| 摘要 |
PURPOSE:To securely recognize a speech signal, which is applied to an actual system or service, without troubling a user. CONSTITUTION:This describes an example of application to a telephone speech. Templates showing characteristics as model characteristics of the limitation of a frequency band, and frequency characteristics, line noises, and background noises of a transmission line are generated 22 as quality deterioration factors of a speech signal and combinations covering those templates are generated; and a simulated speech is generated by making characteristics in those combinations operate on high-quality speech data in an existent learnt speech data base for speech recognition in an analyzing process, and a hidden Markov model is generated by using the simulated speech and used to recognize the unknown telephone speech. |
