| 摘要 |
The broadcasting unit extracts an object displayed onto the display screen of a program to be broadcasted from the program information about programs, generates the relevant information about the extracted object, generates the sync information for synchronizing the program information with the relevant information, and transmits the program information, relevant information, and sync information to a receiving unit. The receiving unit stores the received information and synchronously outputs the program information and relevant information in accordance with the stored sync information.
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