TH20429B - Conditional Access Filter for Packet Video Reverse Polarity Transport System - Google Patents

Abstract

The device in the receiver for processing the broadcast access control message has a transport processor. One packet For selecting signal packets with carrying parts Part Conditional Access Load Header And the rest of the information on access rights Each section header The load will be part of the group of bytes. Which is coded in such a way as to permit Or not allowing the receiver Each person processes the information. Access rights One conditional access filter circuit It is pre-programmed with a conditional access code word. Only one audience member checks the byte grouping. Corresponds to the conditional access header to find out whether or not the term conditional access code is matched only to audience members, this processor is allowed to process the data. Access rights only when the match occurs. After that information This right of access It is used to generate the key of the transducer. It is the message for the broadcast portion of the signal that is transmitted.

Claims (8)

1. Methods of sending conditional access messages that include controlled information The authorization and authorization management consists of preparing N-byte conditional access codes, producing specific N-bytes with predefined logic states, linking different N-bytes conditional access codes. Together M, M, and N are more than one integer. Selection of one conditional access code The N-byte or the specific N-byte code Creating a payload, including a) the selected one. B) Association of the selected code with different N-byte conditional access codes M and c) Code binding. Linked to control information And management of such authorization and the creation of a transport packet that contains a) a) header that specifies the sent packet as That contains the authorization information; and b) the said page. 2. The methods specified in Clause 1 also include: Arrangement of code (M + 1) x N bytes, where all groups R of N - all have bits in a predetermined rational state (all integers R, M, N, and R x N) less than, or Equals (M +1) x N) and where the page preparation procedure consists of a) a selection of either such N-byte conditional access code or the N-byte code of a whole rational state; b) Link the code at Selected with different N-Byte conditional access codes, M and c) Selection code (M + 1) x N bytes or associated code, and d) Association of the last selected code with data. Control and management of such entitlement 3. A machine in a packet receiver for signal processing. A packet that contains the authorization information that is included in the packet with the head. The rider that identifies the packet containing the authorization information. And with the load page at Contains information on the said rights This includes N-byte conditional access codes that are associated with M more than one integer M and N containing paths (10-12) for signaling such packets. The processor passes (13 - 15,19) in response to that packet signal for identifying the signal packet that contains the authorization information and extracting the authorization information page from the specified packet. The authorization data processor (31) and the conditional access filter (30) were organized to investigate. The page loads the authorization information for conditional access to a specific N-byte group and when it fails to detect the access code. Conditional It inhibits the acquisition of the page of authorization information that is excluded by itself. Processing such rights 4. The machine listed in claim 3, which provides an access filter with The condition consists of registers (13) for storing the N-Byte conditional access code, path (15) including a comparison circuit for comparing data. The page loads in the N-Bytes group only with the N-Bytes conditional access code contained in the said register and if there is a match for the access code. Conditional to the specific N-byte group. Will pay the information The right to the data processor granting such rights 5. Machines listed in claim 3, where the integrated access filter Such conditions It is characterized by registers (13) for storing N-byte conditional access codes. The path (15) includes a comparison circuit for a). Find the N-byte of the authorization data page as follows. say Does it contain all of the conditional access code with one rational state? B) If the first N-byte contains all of the code with one rational state, then the N - 1 byte of the specific conditional access code is compared. If there is a N - 1 byte match of the specific conditional access code, the tenant's authorization data page is assigned to the authorization data in a specific N-byte group. Of the aforementioned tenant with N-1 byte of any group of the aforementioned N-byte group. It will produce an open signal to supply the authorization information to the processor. C) When comparing the said authorization data page in a specific N-byte group with the said N-byte tenant-specific conditional access code at Already in the register And if there is a matching of the access code with a condition Such tenant-specific terms against any group of the said specific N-Bytes will supply the authorization information to the said authorization data processor. 6. The machines listed in claim 5 are also characterized by the filter circuit. Such conditional access includes a detector (254) for detecting that Predefined number of N-Bytes groups of conditional access codes. If the authorization data has the same rational state or not, if the authorization data is the same, the page loads the authorization information to the processor. The basis for such rights 7. The machines listed in claim 5 are also characterized by the filter circuit. The conditional access includes a detector (261 - 263) for detecting that a predetermined number of N-byte groups of access code contains Does the condition in the authorization information page have a fully rational state? If so, do the following: Will pay the page to load the authorization information to the person Processing such rights 8. Devices listed in Clause 4 where they are registered for storage. The N-byte tenant-specific conditional access code consists of a N - 1 byte register (251) and the conditional access filter circuit contains a multiplexer (257) with ports. The inputs are connected respectively to the aforementioned N - 1 byte registers and counter (258) for multiplexing conditions. To scan its port input to provide information from the N - 1 byte register to such a comparison, respectively.