| 摘要 |
A conditional access system (CAS) for processing signals between a pay broadcast management system and a digital receiver includes a resource subscriber management system (RSMS) for predetermining time(s) when to transmit an RCM and/or EMM for checking information on the amount used, informing each receiver of the time(s) via a satellite channel, and transmitting the RCM and/or EMM to each receiver at the predetermined time(s); and a receiver which is automatically turned on at a predetermined time to receive and decode the RCM and/or EMM and then transmit the information on the amount used to the RSMS and automatically turned off after completion of the transmission to the RSMS. Alternatively, the CAS includes: an RSMS for previously informing each receiver of a transmission time(s) for an RCM and/or EMM which are/is non-periodically transmitted at a predetermined time(s) via a satellite channel and transmitting the RCM and/or EMM; and a receiver for storing the informed transmission time information, being automatically turned on if it is a time stored to receive and decode the RCM and/or EMM and transmit information on the amount used to the RSMS, and being automatically turned off after completing the transmission of the information.
|
