Real-time operating system (RTOS)
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The real-time operating system is responsible for the management of local resources and network resources, providing basic operational functions and access control of devices. When the set-top box is started, it is downloaded from the central control system through the network by the boot program. For example, the RTOS of the Shenzhen Dike Network Vision Digital Set-top Box is designed to boot from the FLASH ROM, and its boot program functions include: (1) System self-test. Test some hardware of the system, such as DRAM; (2) System settings. The user can set the necessary parameters of the system through the remote controller, such as basic frequency, auxiliary frequency, symbol rate, DTV program information table, etc.; (3) DTV function. Users can watch digital TV programs without the on-demand service; (4) System upgrade. Download the system or station data in the FLASH ROM by discriminating the name and version number of the system or station logo.
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