| 摘要 |
PROBLEM TO BE SOLVED: To notify the state of a client to a server and to surely perform data downloading by sending an error message which shows that there is no empty capacity in a storing means on a client side. SOLUTION: A client 2 requests a server 1 to retrieve music. The server 1 sends a result, i.e., data of a downloading confirmation image a music number (data identifier) and a data size. The client 2 receives the music number and the data size, retrieves an empty capacity of self-memory and decides whether 'KARAOKE' (orchestration without lyrics) data can be stored based on the data size. Next, when a user confirms the names of music and a singer or the like, and presses a downloading confirmation button, a status of whether or not to be stored is sent to the server 1. The server 1 sends 'KARAOKE' data that is specified by a music number to the client 2 when the received status is storable and sends an error message when the status is not storable. |
