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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | US-0220626 (1994-03-28) |
| 발명자 / 주소 |
|
| 출원인 / 주소 |
|
| 인용정보 | 피인용 횟수 : 319 인용 특허 : 0 |
A reprogrammable subscriber terminal of a subscription television service which can have the control program code of its control processor modified by downloading new program code from the headend. The control processor stores a boot program in an internal read only memory. Upon start up and resets,
A reprogrammable subscriber terminal of a subscription television service which can have the control program code of its control processor modified by downloading new program code from the headend. The control processor stores a boot program in an internal read only memory. Upon start up and resets, the boot program determines whether the control program should be changed from a command sent from the headend. The command, termed a parameters transactions, includes the number of expected download program code transactions required to complete the control code modification, the memory space areas where the code is to be loaded, and the channel over which the download program code transactions are to be transmitted. The channel is tuned and when the boot program receives all the download program code transactions accurately and stores them, the boot program will cause the control program to be restarted at a selected address of the new or modified control program code which has been downloaded. The boot program may download code to different configurations of subscriber terminals including those with Flash EPROM or extended memories from plug-in expansion modules.
A method of downloading program code to modify the control program of a subscriber terminal of a subscription television system, said method comprising the steps of: providing a memory in the subscriber terminal; storing in said memory a boot code program operative for downloading new program code f
A method of downloading program code to modify the control program of a subscriber terminal of a subscription television system, said method comprising the steps of: providing a memory in the subscriber terminal; storing in said memory a boot code program operative for downloading new program code for the control program of the subscriber terminal into said memory from a remote location, said control program operative for controlling predetermined features of the subscriber terminal; providing over one of a plurality of channels of said subscription television system a download program code parameters transaction to the subscriber terminal, said download program code parameters transaction including information identifying a selected one of said plurality of channels on which said new program code will be transmitted; activating said boot code program in response to a predetermined condition; said boot code program operative for tuning the subscriber terminal to said selected one of said plurality of channels; and storing said new program code in said memory.
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