| 摘要 |
<p>A communication system and so on capable of efficiently executing registration or release of a plurality of devices owned by a user. In this communication system, a contents processing device acquires a second source ID list of the contents reproducing device, recommends the registration, when it is detected on the basis of the second source ID list that the contents reproducing device is not registered in a management server and that a recorder ID of the contents processing device is not registered in the second source ID list, requests the management server to register the contents reproducing device when it accepts a registration instruction of the contents reproducing device, receives a registration end returned from the management server, adds a group ID to be stored in a first source ID list, to the second source ID list of the contents reproducing device, and adds the recorder ID of the contents processing device to the second source ID list when the registration instruction of the management server of the contents reproducing device is not accepted.</p> |
