| 摘要 |
PURPOSE: To delete stored data in a priority order based on the number of times of selecting music and the selection time when a storage capacity is deficient, to lower the frequency of receiving data from a center unit and to shorten the sales time. CONSTITUTION: When it is reported that the music is sold from a music sales control mechanism 18, a selection frequency registration mechanism 32 stores the name of the sold music and the summed-up of the number of times of selection and a selection time registration mechanism 33 stores the name of the music and the time, respectively. When the data of the selected music and new music, etc., are not stored in a storage device 12 and are received from the center unit 30 by a telephone line 29 or the like and the capacity of the storage device 12 is deficient, a music data elimination mechanism 31 decides the priority order of data elimination inside the storage device based on the number of times of selecting the music and the time and performs elimination. Thus, the frequency of reception from the center is reduced and the waiting time at the time of sales is shortened. Also, by a reservation function 34, the next music is reserved even during communication. |
