| 摘要 |
PROBLEM TO BE SOLVED: To prevent a slowly spoken sound signal from being converted into a more slowly spoken sound signal resulting from applying a speech speed conversion processing to the slowly spoken sound signal in a speech speed conversion device. SOLUTION: A pitch period Tn-1 stored in a pitch period storage part 2 is compared with a pitch period Tn which is newly extracted in a pitch period extraction part 1 by a pitch period comparison part 3. The value of a counter 4 is increased in accordance with the comparison result. A comparison part 6 compares a value M obtained by multiplying the pitch period Tn by the value C of the counter 4 with a threshold S which is set in a threshold setting part 5. A speech speed conversion part 7 applies a speech speed conversion processing to an input sound signal at a prescribed mode based on the comparison result. |
