| 摘要 |
When a STB having a tuner device is connected to a DTV for the first time, the DTV creates a channel information DB for the STB based on a channel information DB for the DTV itself. After that, when the STB performs a channel selection operation based on a command from one of controller devices in an IEEE 1394 network and, as a result, the STB receives a broadcast signal on a new channel that is not stored as a receivable channel in the STB channel information DB, the DTV adds the new channel to the DB. When the STB performs a channel selection operation based on a command from the DTV and, as a result, the STB cannot receive a broadcast signal on a channel stored as a receivable channel in the STB channel information DB, the DTV deletes the channel from receivable channels stored in the DB.
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