Patent ID: 7562231

Claim:
A recording and reproduction system including a recording device and a reproduction device, the recording and reproduction system comprising: the recording device including; a recording unit for recording contents as recorded contents; a communication unit for communicating with the reproduction device; a unit for receiving unique information including information regarding the recorded content and information regarding an external storage medium, and for recording the unique information as recorded unique information in the recording unit and in the external storage medium in association with the recorded contents, where the external storage medium is removably coupleable to the recording device, and where the external storage medium does not contain at least a portion of the recorded contents; a unit for writing communication information including an address of the recording device into the external storage medium; a unit for receiving unique information associated with a content delivery request, as sent from the reproduction device, and for checking whether the received unique information coincides with the recorded unique information; and a unit for transmitting the recorded contents, including the portion of the recorded contents not contained in the external storage medium, associated with the recorded unique information to the reproduction device, if the received unique information coincides with the recorded unique information, and the reproduction device including; a unit for transmitting the unique information, as read out from the external storage medium coupled to the reproduction device, to the recording device having the address which is included in the communication information as read out from the external storage medium.