| 摘要 |
When the kind of disk is changed by reformatting the disk inserted, a control cannot be made in accordance with the standard corresponding to the kind of the reformatted disk. There are provided an output step of outputting to an STB the information indicating that reading the disk information is impossible when a DVD recorder receives a read request of the disk information from the STB having a read right of the descriptor during initialization of the replaceable disk, and an acquisition step of acquiring a descriptor identifier from the DVD recorder, when the STB requests again the read right of the descriptor firstly after the DVD recorder outputs to the STB the information indicating that reading the disk information is impossible.
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