| 摘要 |
<p>MAN/MACHINE COMMUNICATIONS SYSTEM USING FORMANT BASED SPEECH ANALYSIS AND SYNTHESIS Formants are extracted and stored from reference speech. Input speech is suitably processed to derive unlabelled candidate formants. The sets of formants from the input and reference speech are compared using dynamic programming techniques. A further sequence comparison provides time alignment of the input and reference speech. The sequence comparisons extract a dissimilarity measure based on the formant frequencies and other characteristics of the speech. The reference speech resulting in the lowest dissimilarity measure identifies the input speech recognized by the system. System feedback may be provided and is composed of designated responsive multi-voiced speech. The multi-voiced output speech is obtained primarily by altering the prosodic parameters and formant frequencies of the designated responsive speech. Thus, the designated responsive speech may, say in an aircraft communication system, use one voice output when providing an information response to the pilot's recognized input speech question and another appropriately strident voice to issue the pilot warnings. The system also may be placed in a training mode to evaluate performance and adjust parameters.</p> |
