| 摘要 |
PURPOSE: To obtain a high recognition rate by utilizing the pattern of a vector field, performing a defocusing process (blurring process) by directions, and utilizing its result for voice recognition. CONSTITUTION: A time space pattern is converted into a vector field pattern having size and a direction at each grating point in a space by spatial differentiation, and as to the vector of the vector field pattern, its direction parameter is quantized into N values (N: integer). This quantized value is separated by vectors to generate N two-dimensional patterns having the sizes of the vectors as values at respective grating points, and the blurring process is performed by the directions of the two-dimensional patterns by the directions as to a time base and/or a space axis to extract a pattern as a feature of the voice. Consequently, high recognition rates is obtained even for voice recognition regarding large vocabulary and voice recognition regarding an unspecified speaker. |
