| 摘要 |
PROBLEM TO BE SOLVED: To select another recording means even when a recording region in an empty capacity fails and to continue a control operation by a method wherein a recording means is provided, a means, to be controlled, which comprises information regarding the empty capacity in the recording means is provided and a control means which acquires information regarding the empty capacity in the recording means from the means to be controlled is provided. SOLUTION: AN OPEN instruction is issued to an SMS/GW part 201 from a host control terminal 101. The SMS/GW part 201 reduces the value of an empty capacity by the portion of the value of a security region (DUR) designated by the OPEN instruction. In an empty-capacity management information part 250, an empty capacity in an empty capacity information part 251 is reduced from 30:00:00:00 to 20:00:00:00. In an empty-capacity information part 551 in an AV Server part 500, an empty capacity is reduced in the same manner. When a recording region fails due to a shortage of an empty capacity in the security of a region, the SMS/SG part 201 synchronizes empty capacity information, an empty capacity which is controlled by the SMS/GW part agrees with an empty capacity which is managed by the AV Server part, and a contradiction is eliminated. |
