KR100693525B1 - Method of verifying an sdmb in the sdmb terminal - Google Patents

Abstract

An SDMB(Satellite Digital Multimedia Broadcasting) verification method in an SDMB terminal is provided to enable the SDMB terminal to confirm whether normal EMM(Entitlement Management Message) updating is conducted, in real time, to warn of abnormality, thus an error during EMM updating is easily detected in a verification and development process. After performing initialization, an SDMB terminal parses a CAT(Conditional Access Table) from information coming into a CAS(Conditional Access System) channel, and updates an EMM(S21-S23). The terminal delivers the parsed CAT to a CAS to demand an EMM PID(Packet Identifier) notification, and obtains an EMM PID from the CAS(S24,S25). The terminal checks the obtained EMM PID in real time, and confirms whether EMM updating is normally conducted(S26).

Description

Method of verifying an SDMB in the SDMB terminal {Method of Verifying an SDMB in the SDMB Terminal}

1 is a diagram illustrating a configuration for SDMB verification in a satellite digital multimedia broadcasting (SDMB) terminal according to an exemplary embodiment of the present invention.

2 is a flowchart illustrating a SDMB verification method in an SDMB terminal according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

11: Conditional Access System

12: broadcast server (Server) 13: Internet (Internet)

14: satellite 15: base station

16: SDMB terminal

The present invention relates to a method for verifying SDMB in an SDMB terminal, and more particularly, to a method for verifying SDMB in an SDMB terminal for verifying and viewing a reliable SDMB through error prevention of an EMM (Entitlement Management Message) update in the SDMB terminal.

In general, in SDMB broadcasting, in order for a user to listen to the SDMB broadcasting stably, it is essential to normally update EMM information from the SDMB terminal to CAS, which is a paid subscriber management apparatus.

However, when parsing a Conditional Access Table (CAT) to update the EMM information, the cyclic redundancy check (CRC) information of the CAT is used as information for determining a descriptor tag. When an error occurs, if the corresponding CRC is the processing target descriptor tag, the EMM update to the CAS is not normally performed.

At this time, the broadcast cannot be reproduced due to the corresponding error only when the EMM update is not continuously performed for about 4 days.

However, if the corresponding CRC is changed in the middle before about 4 days, and is not the descriptor tag to be processed, the EMM update is recognized as a normal EMM update, making it very difficult to verify an EMM update failure error item due to an EMM parsing error. In the end, there is a problem that the authorized user may not normally listen to the SDMB broadcast.

In this case, the CAS companies and operators that have performed the SDMB terminal verification are very difficult to verify the EMM update failure error item due to the EMM parsing error.

First, if the first byte of the CRC is not a descriptor for processing object, it is not included in the category of the processing descriptor, so that a normal CA descriptor parsed without additional parsing is delivered by the CA client. As a result, the EMM is updated normally and does not cause a problem.

However, when the first byte of the CRC comes to the descriptor tag, the total number of tags to be processed is divided by the number of cases of one byte (for example, about 24/256). do.

Third, when the SDMB broadcast is not available for viewing due to the corresponding EMM update error, when the first byte of the CRC becomes the descriptor tag value, the broadcast byte is not immediately viewed, but the first byte of the CRC is changed. Is continuously the cause of the EMM update error occurs for more than four days without being treated as a non-processing target value, and the user cannot watch the broadcast. Here, the key update EMM cycle is about 4 days.

If the second and the third are at the same time, there is a problem that can not watch the broadcast, in this case, if the first byte of the CRC is not the value of the processing target descriptor in the situation occurs, it is recovered immediately to become a normal EMM update This makes it very difficult to detect the corresponding EMM update error. However, when an SDMB terminal having such a problem is introduced to the market, since the authorized user may not be able to listen to the SDMB broadcast, the non-broadcasting ripple effect due to the problem is very large.

In other words, in order to enter the market, the SDMB terminal is currently subject to the DVT (Design Verification Test) certification of the CAS company and the verification of the operator's network interworking. If an error is present in the SDMB terminal, the error is quite difficult to detect and can therefore be used by the user with that potential problem in the market, and because of this problem, an authorized user may be able to watch the SDMB broadcast itself. There was a problem that could be impossible.

As described above, in the conventional SDMB broadcasting, the CA descriptor is parsed in a part of parsing CAT among information coming down the CAS channel for EMM processing, and then the next CRC data is viewed and parsed. Therefore, when the first byte of the CRC is a descriptor tag to be processed, an abnormal data is transmitted to the CA task by the client by overwriting an existing parsed CA descriptor, so that the ID of the CAS is a smart card. Unlike the data extracted from the smart card, the EMM PID (Packet Identifier) is not registered in the API (Application Programming Interface), so the EMM update cannot be performed. That is, the conventional SDMB broadcast, there is a problem that can not be viewed due to the EMM update error when watching the SDMB broadcast.

In order to solve the problems described above, the present invention provides a method for verifying the SDMB in the SDMB terminal to verify and view the reliable SDMB through the error prevention of the EMM update in the SDMB terminal, the object thereof.

In addition, the present invention is to enable a reliable SDMB verification and viewing by checking in real time whether the normal EMM update is made in the SDMB terminal, its purpose is to.

In addition, the present invention checks in real time whether or not the normal EMM update is made in the SDMB terminal to alert in case of abnormality, to easily determine the error of the EMM update in the verification and development process, and always check whether the EMM update is normal The purpose of this is to enable reliable and stable viewing of SDMB.

In addition, the present invention, by always notifying the normal whether the EMM update in the SDMB terminal, to block the distribution of the terminal with the EMM update error itself, and to enable effective feedback (Feed-back) in the market, as an authorized user It is possible to increase the service reliability of the SDMB terminal by enabling a reliable SDMB viewing, and its purpose is to.

In the SDMB terminal according to an embodiment of the present invention for achieving the above object, the SDMB verification method, after performing initialization in a satellite digital multimedia broadcasting (SDMB) terminal, the downlink to the CAS (Conditional Access System) channel Parsing a Conditional Access Table (CAT) among the information to update an Entitlement Management Message (EMM); Obtaining the EMM PID from the CAS after forwarding the parsed CAT to the CAS to request an EMM PID (Packet Identifier) notification; And checking whether the EMM update is normally performed by inspecting the acquired EMM PID in real time.

The SDMB verification method in the SDMB terminal according to an embodiment of the present invention includes the steps of recognizing that the EMM update is normally performed when the obtained EMM PID is '0x30'; The method may further include a step of normally outputting the SDMB broadcast transmitted from the satellite through the A / V (Audio and Video) output terminal.

Alternatively, the SDMB verification method in the SDMB terminal according to an embodiment of the present invention includes the steps of recognizing that the EMM update is not normally performed when the obtained EMM PID is '0x1fff'; The method may further include generating an alarm message for alerting the EMM normal update failure and permanently outputting the alarm message.

The present invention is to implement an SDMB terminal to guarantee the EMM update, by analyzing the EMM PID received in the notification (Notification) in CAS in real time to immediately alert (Alert) when an EMM update error occurs, verification and development This makes it easy for the process to determine the error of the EMM update. In addition, the present invention always ensures whether the EMM update is normal, thereby blocking the distribution of the terminal with the EMM update error by itself, thereby enabling reliable and stable SDMB viewing. Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, a configuration for verifying SDMB in an SDMB terminal according to an embodiment of the present invention includes a CAS 11, a broadcast server 12, an Internet 13, a satellite 14, and a base station. And an SDMB terminal 16.

The CAS 11 is an authentication system for confirming the right to view a broadcast. The platform provider protects subscribers and manages personal information. The platform provider scrambles broadcasts and broadcasts the scrambled subscribers. Allow it to be solved.

The broadcast server 12 digitizes information such as video and audio, generates the bit stream by integrating the digitized information, generates error correction protection and digital modulation, and converts the digitally modulated signal into a predetermined broadcast channel. Frequency conversion and amplification to the required transmit power is transmitted to the satellite (14).

The Internet 13 transmits and receives information between the CAS 11 and the base station 15.

The satellite 14 transmits the information transmitted from the broadcast server 12 to a broadcast channel for transmitting to a plurality of subscribers.

The base station 15 exchanges information via the Internet 13 and the satellite 14 with the SDMB terminal 16.

The SDMB terminal 16 receives the broadcast channel transmitted from the satellite 14 to provide an SDMB broadcast service. In particular, the SDMB terminal 16 performs CAT parsing to update the EMM, and EMM PID notification to the CAS 11. Request the request, check the EMM PID obtained from the CAS 11 in real time to confirm whether the EMM update is normally performed, and display an alert message when the EMM update is not normally performed.

The SDMB verification method in the SDMB terminal according to an embodiment of the present invention will be described with reference to the flowchart of FIG. 2.

First, after the user performs an initialization operation for listening to the SDMB broadcast by using the SDMB terminal 16 (step S21), the SDMB broadcast is started, at this time, information coming down the channel of the CAS 11 for EMM processing. The CAT is parsed to update the EMM.

That is, the SDMB terminal 16 starts the EMM section update after parsing the appropriate input data after acquiring the CAT from information coming down the CAS channel for updating the qualification management information (step S22). (Step S23).

Then, the SDMB terminal 16 forwards the parsed CAT to the CAS 11 and requests the CAS 11 for the EMM PID notification (step S24), and then the slave 11 receives the slave from the CAS 11. The EMM PID is obtained by the intervention (step S25).

Accordingly, the SDMB terminal 16 checks in real time the EMM PID received from the CAS 11 as notification (step S26), for example, the CAS (11). It is checked whether the EMM PID acquired by the notification from '0x30' or '0x1fff'.

If the EMM PID obtained by the notification from the CAS 11 is '0x30' in the 26th step (S26), that is, when a normal EMM update is performed, the SDMB terminal 16 performs a normal routine. Then, the SDMB broadcast is normally output through the A / V (Audio and Video) output stage (step S27).

On the other hand, when the EMM PID acquired by the notification from the CAS 11 in step 26 (S26) is '0x1fff', that is, the normal EMM update is not made, the SDMB terminal 16 It permanently displays an alarm message indicating that the EMM update is not normally performed (step S28).

In other words, when an EMM update error occurs, an EMM update failure alert message is generated and output immediately to alert the EMM normal update failure, so that the error of the EMM update can be easily determined in the verification and development process, and always EMM By knowing whether the update is normal, the distribution of the terminal with the EMM update error can be blocked at the source, and a reliable and stable SDMB can be viewed.

As described above, EMM information is normally updated from the SDMB terminal to the CAS in order to stably listen to the SDMB broadcast. By the SDMB verification method in the SDMB terminal according to an embodiment of the present invention, the EMM is caused by an error in parsing the EMM. By showing EMM acquisition information in real time when no updates are available, it is reported in any case that prevents EMM updates from being performed, ensuring the EMM update process during all validation procedures and development, and ensuring that authorized users are trusted. And stable SDMB broadcasting service.

As described above, by checking in real time whether the normal EMM update is made in the SDMB terminal according to the present invention and alerting in case of abnormality, the error of the EMM update can be easily determined in the verification and development process, and there is an EMM update error. It is possible to block the distribution of the terminal itself and to provide effective feedback in the market, thereby enabling the authorized users to watch the SDMB reliably, thereby increasing the service reliability of the SDMB terminal.

Claims (3)

Updating initialization of an Entitlement Management Message (EMM) by parsing a Conditional Access Table (CAT) out of information coming down a CAS (Conditional Access System) channel after performing initialization in a satellite digital multimedia broadcasting (SDMB) terminal; Obtaining the EMM PID from the CAS after forwarding the parsed CAT to the CAS to request an EMM PID (Packet Identifier) notification; And checking whether the EMM update is normally performed by inspecting the obtained EMM PID in real time. The method of claim 1, Recognizing that the EMM update is normally performed when the obtained EMM PID is '0x30'; The SDMB verification method in the SDMB terminal, characterized in that further comprising the step of outputting the SDMB broadcast normally transmitted from the satellite through the A / V (Audio and Video) output terminal. The method of claim 1, Recognizing that the EMM update is not normally performed when the obtained EMM PID is '0x1fff'; The SDMB verification method of the SDMB terminal, characterized in that further comprising the step of generating an alarm message for warning the failure of the normal EMM update.

Images