| 摘要 |
PURPOSE:To obtain a synthesized voice which is close in articulation to a natural voice by providing a decision means which decides whether each frame is a consonant or vowel part frame and a control means which uses repetitive voice information of the frame repeatedly or thins it out according to the decision result. CONSTITUTION:Voice data required for synthesis is sent from a voice file 1 to a voice memory 2 and stored temporarily. The voice memory 2 is controlled by a frame control circuit 10, spectrum information is transferred, frame by frame, to a predicted gain calculator 3 and a register 6, and the residue is transferred to a register 7. Further, the predicted gain calculator 3 calculates a predicted gain and a decision device 4 compares the value of the predicted gain with the value of a threshold value register 5. Then the predicted gains are calculated, frame by frame, and compared with the threshold value to decide whether each frame is the consonant part frame or not according to the comparison result, thereby preventing the consonant part frame from being repeated and thinned out. Consequently, smooth, continuous, and low-speed and high-speed generation is realized and a high-speed and a low-speed synthesized voice which are close in articulation to a natural voice are obtained. |
