| 摘要 |
The management of an update program is facilitated by reducing the total data of an update program, which is transmitted and received by utilizing broadcasting waves to and from a group of receiver devices belonging to the same kind but having a plurality of hardware versions of its internal device(s). A receiver device includes a processing section for executing a first program to control an operation of the device; an internal device for retaining a second program and executing the second program under control of the processing section to function based on the second program; a receiving section for receiving program data on an update of a program; and a storage section for storing the first program and the received program data. One of hardware versions is adopted for the internal device, each hardware version having a corresponding second program. The program data contains first update information and multiple pieces of second update information. The first update information concerns an update of the first program, and each second update information concerns an update of each second program.
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