| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a speech database producing device and the like for effectively protecting speech data while freely supplying data representing speeches. <P>SOLUTION: A speech segment registration unit R acquires speech segment data representing a speech segment, acquires three kinds of data representing the data length of the speech segment data, the speaking speed of the speech segment and time variation in frequency of a pitch component, extracts and operates one piece of data from each data, i.e. three pieces of data in total to produce an encryption key, encrypts the speech segment data by using this encryption key into encrypted speech segment data, and stores the encrypted speech segment data in a speech segment database D together with speech segment reading data. A main body unit M reads out the encrypted speech segment data from the speech segment database D, produces the encryption key by using the three pieces of data among data stored in the speech segment database D, restores the speech segment data by decoding the encrypted speech segment data by using the encryption key, and uses the data. <P>COPYRIGHT: (C)2007,JPO&INPIT |
