CN101753964B - Method and device for realizing the terminal roaming service of digital TV - Google Patents

Abstract

The present invention provides a method and a device for realizing the terminal roaming service of a digital TV. The method comprises the following steps: a zone where the digital TV currently exists is judged whether is a local zone; if the judging result is the local zone, the corresponding information of the local zone transmitted by the front end of the local zone is received, and /or the corresponding information of a central zone transmitted by the front end of the central zone is received; the received corresponding information of the local zone and /or the central zone is correspondingly processed; the corresponding information of the local zone comprises local authority information, and/or local inverse-authority information, and/or local rate information; the corresponding information of the central zone comprises central authority information, and/or central inverse-authority information, and/or central rate information. By ensured zone, the corresponding information of the local zone, the central zone or a roaming zone is received; the corresponding information is processed to enable terminal users to watch digital programs in different zones, so the present invention brings great convenience to users.

Description

Method and device for realizing roaming of digital TV terminal

technical field

The present invention relates to mobile digital TV technology and conditional access technology, in particular to a method and device for realizing digital TV terminal roaming by receiving information such as authorization, anti-authorization and product rate when portable digital TV terminals move across regions.

Background technique

At present, the conditional access system (CAS: Condition Access System) provides the necessary technical means for the operation of digital TV. It is a system used to control users to receive broadcast services, and realizes the paid service of the broadcast system through authorization management.

The conditional access system controls the broadcast service by scrambling the broadcast data and encrypting the scramble control information.

As shown in Figure 1, the front end uses the product key to encrypt the control word (CW: Control Word), and transmits it in the authorization control message (ECM: Entitlement Control Message). The front end uses the user key to encrypt the product key, and sends the encrypted product key to the mobile terminal through an Entitlement Management Message (EMM: Entitlement Management Message) data packet.

The mobile terminal filters the EMM data packet according to the security device number, and sends the filtered EMM data packet to the security device. The security device uses the pre-embedded user key to decrypt the encrypted product key, and decrypts the decrypted product key. The key is stored in the secure device.

The mobile terminal filters out the ECM package of the CA manufacturer according to the identification number of the ECM package, and sends it to the security device. The security device uses the decrypted product key to decrypt the encrypted control word, and returns the decrypted control word. Descramble programs for the terminal. After the digital program is descrambled, the user can watch the authorized product through the display unit of the terminal.

The inventor finds that the defect of prior art is in the process of realizing the present invention: along with the development of digital broadcasting television technology, mobile television broadcasting can provide digital broadcasting television program and information service to portable terminal, because mobile digital broadcasting is oriented to flow For the crowd, the existing conditional access technology cannot guarantee that mobile TV terminals in the local area can watch TV programs normally when crossing areas.

Contents of the invention

The purpose of the embodiments of the present invention is to provide a method and device for realizing roaming of a mobile digital TV terminal. Through the embodiment of the present invention, the mobile digital TV terminal can receive relevant information across regions and process the relevant information, which brings great convenience to users.

In order to achieve the above purpose, an embodiment of the present invention provides a method for implementing digital TV terminal roaming, the method includes: judging whether the area where the digital TV terminal is currently located is a local area; if the judging result is a local area, receiving the The relevant information of the local area sent by the front end of the local area, and/or the relevant information of the central area sent by the front end receiving the central area; the received relevant information of the local area, and/or the relevant information of the central area Perform corresponding processing; wherein, the relevant information of the local area includes local authorization information, and/or local anti-authorization information, and/or local rate information; the relevant information of the central area includes central authorization information, and/or Central anti-authorization information, and/or central rate information.

In order to achieve the above purpose, an embodiment of the present invention provides a device for realizing roaming of a digital TV terminal, the device includes:

A first judging unit, the first judging unit is used to judge whether the area where the digital TV terminal is currently located is a local area;

The first receiving unit, if the judgment result is a local area, then receive the relevant information of the local area sent by the front end of the local area, and/or receive the relevant information of the central area sent by the front end of the central area;

A first processing unit, configured to perform corresponding processing on the received relevant information of the local area and/or the received relevant information of the central area;

Wherein, the relevant information of the local area includes local authorization information, and/or local anti-authorization information, and/or local rate information; the relevant information of the central area includes central authorization information, and/or central anti-authorization information, and/or central rate information.

The beneficial effect of the embodiment of the present invention is that the digital TV terminal can receive related information across regions and process the related information, so that the digital TV terminal user can watch TV programs in local, central or roaming regions, bringing users Great convenience.

Description of drawings

The drawings described here are used to provide a further understanding of the embodiments of the present invention, constitute a part of the application, and do not limit the embodiments of the present invention. In the attached picture:

FIG. 1 is a schematic diagram of the operation of a conditional access system in the related art;

FIG. 2 is a schematic structural diagram of a device for realizing roaming of a digital TV terminal according to Embodiment 1 of the present invention;

3 is a schematic structural diagram of a device for realizing roaming of a digital TV terminal according to Embodiment 2 of the present invention;

FIG. 4 is a schematic structural diagram of a device for realizing roaming of a digital TV terminal according to Embodiment 3 of the present invention;

Fig. 5 is a flow chart of processing local tariff information in Embodiment 3 of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

The present invention provides a method and device for realizing roaming of a digital television terminal. The embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

Example 1

The present invention provides a device for realizing roaming of a digital TV terminal. As shown in FIG. 2 , the device includes a first judging unit 201, a first receiving unit 202, and a first processing unit 203; Judging whether the area where the digital TV terminal is currently located is a local area; if the judgment result of the first judging unit 201 is a local area, then the first receiving unit 202 will receive the relevant information of the local area sent by the front end of the local area, and /or receive the relevant information of the central area sent by the front end of the central area; the first processing unit 203 is configured to perform corresponding processing on the received relevant information of the local area and/or the relevant information of the central area;

Wherein, the relevant information of the local area includes local authorization information, and/or local anti-authorization information, and/or local rate information; the relevant information of the central area includes central authorization information, and/or central anti-authorization information, and/or or central rate information.

As shown in Figure 2, the device also includes a second receiving unit 204 and a second processing unit 205; wherein, if the judgment result of the first judging unit 201 is a roaming area, the second receiving unit 204 is used to receive the roaming area The related information of the roaming area sent by the front end; the second processing unit 205 is configured to perform corresponding processing on the received related information of the roaming area;

Wherein, the relevant information of the roaming area includes roaming authorization information, and/or roaming anti-authorization information, and/or roaming rate information.

In this embodiment, judging the area where the digital TV terminal is located can be determined by the terminal user according to whether the area where the terminal is located is local or non-local, but it is not limited to this method, and other existing methods can also be used.

In this embodiment, when the terminal user judges that the digital TV terminal is in the local area, the receiving frequency of the terminal can be set as the receiving frequency of the local area through a setting unit, so that the digital TV terminal only receives the local area, Relevant information of the central area, and correspondingly process the received relevant information.

In addition, when it is judged that the digital TV terminal is in a roaming area, the terminal user can set the receiving frequency point as the receiving frequency point of the roaming area, so that the digital TV terminal only receives the relevant information of the roaming area, and the received related information The information is processed accordingly.

In this embodiment, the above related information may be sent in the form of an authorization management data packet (EMM data packet).

Example 1, when it is judged that the digital TV terminal is in the local area:

1) When the received relevant information is local authorization information, the local authorization information may include the local product key identifier and the local product key encrypted with the user key, then processing the relevant information means: the pre-embedded The local product key identifier and the user key decrypt the local authorization information to obtain the local product key identifier and the local product key. In this embodiment, the local product key ID includes the local area ID and product ID to which the authorized product belongs, and the local product key ID and local product key can be stored. When authorizing control information, the local product key identifier and local product key can be used to decrypt the authorization control information to obtain a local scrambling control word, and use the local scrambling control word to descramble the received local digital program And play, so that the terminal user can watch the digital program in the local area.

2) When the received relevant information is local anti-authorization information, processing the relevant information refers to deleting the stored corresponding information according to the product identification and region identification information carried in the local anti-authorization information.

3) When the received relevant information is local rate information, processing the relevant information refers to: judging whether the received local rate information already exists; if the judgment result is no, then displaying the local rate information , and store it;

Wherein, the local rate information includes the identification of the local area to which the rate information belongs, version information, product identification, and/or product price. In this way, the terminal user can order the product according to the rate information, and only when the product is played, the corresponding fee is deducted from the wallet. Before playing the product, the ordered product information can also be modified or the ordered product can be deleted according to the rate information.

In addition, if the judgment result is that the received local rate information already exists, it is further judged whether the version information of the local rate information is consistent with the stored version information; if the judgment result is that the version information is inconsistent, the stored local rate information is Update the rate information, that is, delete the stored rate information, and store and display the received local rate information. If the judgment result is that the version information is consistent, the received local rate information is discarded.

Example 2, when it is judged that the digital TV terminal is in the local area and the received relevant information is the central authorization information sent by the central area, the central authorization information may include the central product key identifier and the central product key. Processing means that the central authorization information can be decrypted by using the pre-embedded central product key identifier and the user key to obtain the central product key. In this embodiment, the central product key identifier includes the central region identifier and product identifier to which the authorized product belongs, and the central product key identifier and central product key can be stored. When authorizing the control information, the central product key identifier and the central product key can be used to decrypt the authorization control information to obtain the central scrambling control word, and use the central scrambling control word to descramble the received central digital program And play, so that the terminal user can watch the digital program in the central area.

In addition, when receiving the central anti-authorization information and central fee rate information sent by the front end of the central area, the processing method is similar to that of the local area, and will not be repeated here. Moreover, for authorized products in the central region, the authorized product can only be de-authorized in the local region.

Example 3, when it is determined that the digital TV terminal is in a roaming area and the received relevant information is roaming authorization information sent by the roaming area, the roaming authorization information includes the roaming product key identifier and the roaming product key, and the related information is The processing means that the roaming authorization information can be decrypted by using the pre-embedded roaming product key identifier and the user key to obtain the roaming product key. In this embodiment, the roaming product key ID includes the roaming area ID and product ID to which the authorized product belongs, and the roaming product key ID and the roaming product key can be stored. When authorizing the control information, the roaming product key identifier and the roaming product key can be used to decrypt the authorization control information to obtain the roaming scrambling control word, and use the roaming scrambling control word to descramble the received roaming digital program And play, so that the terminal user can watch the digital program in the roaming area.

In addition, when the roaming anti-authorization information and roaming rate information sent by the front end of the roaming area are received, the processing method is similar to that of the local area, and will not be repeated here. Moreover, for authorized products in the central area, de-authorization can only be performed on the authorized product in the local area, while de-authorization cannot be performed in the roaming area.

In this embodiment, the local area identifier can automatically obtain the local area identifier according to the number of the security device of the digital television terminal. For example, the security device number is composed of 16 digits, wherein the 2-5 digits represent The area number is the area number. The above authorization and other functions can only be realized by the digital TV terminal in conjunction with the security device. When the terminal is used in conjunction with the security device, the terminal can learn the security device number, and at the same time know the user's affiliation from the 2nd to 5th digits of the number. The region (the security device number of the user is issued by the operator in the region to which it belongs, and each regional operator only has the authority to issue the security device number in the local area). The identifier of the central area may be "1", and the identifier of the roaming area may be any identifier other than the identifiers of the local area and the central area.

In the above embodiment, the central product key of the central region may be unique, wherein the region identifier in the central product key identifier is set to 1, and of course, it may also be other values.

In addition, it can be seen from the above that when the digital TV terminal is in the local area, it can only receive the authorization information issued by the front end of the central area to authorize the central product, that is, the terminal only receives the central product in the local area and not in the roaming area. Authorization and anti-authorization.

In this embodiment, the device can be used alone, or can be integrated into a security device of a digital television terminal and used in cooperation with the terminal. When the device is integrated with the security device and used in conjunction with the terminal, each security device is identified by a unique number. That is, the security device numbers of all users cannot be repeated.

It can be seen from the above that the device receives relevant information of local, central or roaming regions by determining the region where the digital TV terminal is located, and processes the relevant information so that the terminal user can watch digital programs in different regions.

Example 2

An embodiment of the present invention provides a device for realizing roaming of a digital TV terminal. As shown in FIG. The function of the processing unit 205 is similar to that of Embodiment 1 and will not be repeated here.

As shown in FIG. 3, the device may further include a third receiving unit 301, a third processing unit 302, and a first storage unit 303; wherein,

If the judgment result of the first judging unit 201 is a local area, the third receiving unit 301 is configured to receive the local authorization control information sent by the front end of the local area, and/or receive the central authorization control information sent by the front end of the central area ; Wherein, the information carried by the local authorization control information includes the local product key identifier and the local scrambling control word encrypted by the local product key; the information carried by the central authorization control information includes the central product key identifier and the central product key key encrypted central scrambling control word;

The third processing unit 302 is configured to use the pre-stored local product key identifier and local product key, and/or the central product key identifier and the central product key to pair the received local authorization control information, and/or the central authorization control The information is respectively decrypted to obtain a local scrambling control word, and/or a central scrambling control word;

The first storage unit 303 is used to store the local product key identifier and local product key, the central product key identifier and the central product key, the local scrambling control word and the central scrambling control word, and can also store user key and other information.

In this way, after the scrambling control word is obtained, the received digital program sent by the front end of the local area or the central area can be descrambled and then played by using the scrambling control word.

As shown in FIG. 3, the device may further include a first descrambling unit 304 and a first playing unit 305; wherein, the first descrambling unit 304 utilizes the local scrambling control word, and/or the central scrambling control word pair Descrambling the received local digital program sent by the front end of the local area, and/or the central digital program sent by the front end of the central area; the first playback unit 305 is used to play the descrambled local digital program, and/or or central digital programming.

As shown in FIG. 3, the device may further include a fourth receiving unit 306, a fourth processing unit 307, and a second storage unit 308; wherein,

If the judgment result of the first judging unit 201 is a roaming area, the fourth receiving unit 306 is configured to receive roaming authorization control information sent by the front end of the roaming area, and/or receive central authorization control information sent by the front end of the central area; Wherein, the information carried in the roaming authorization control information includes the roaming product key identifier and the roaming scrambling control word encrypted with the roaming product key; the information carried in the central authorization control information includes the central product key identifier and the encrypted central scrambling control word;

The fourth processing unit 307 uses the pre-stored roaming product key identifier and roaming product key, and/or the central product key identifier and the central product key to pair the received roaming authorization control information, and/or the central authorization control information, respectively Deciphering to obtain the roaming scrambling control word, and/or the central scrambling control word;

The second storage unit 308 is used for storing the roaming product key, the central product key, the roaming scrambling control word and the central scrambling control word, and can also store user key and other information. .

As shown in FIG. 3, the device further includes a second descrambling unit 309 and a second playing unit 310; wherein, the second descrambling unit 309 is configured to use the roaming scrambling control word and/or the central scrambling control word Descrambling the received roaming digital program sent by the front end of the roaming area and/or the central digital program sent by the front end of the central area; the second playback unit 310 is used to play the descrambled roaming digital program, and/or or central digital programming.

In this embodiment, the local entitlement control information, central entitlement control information and roaming entitlement control information may be transmitted through entitlement control message (ECM) data packets. After receiving the ECM data packet sent by the front end, the third processing unit 302 and the fourth processing unit 307 can use the local product key identifier and local product key stored in the first storage unit 303 and the second storage unit 308, The central product key ID and central product key, roaming product key ID and roaming product key decrypt the received ECM data packet, and only when the region ID and product ID to which the ECM data packet belongs completely match, the The ECM data packet is decrypted, otherwise the ECM data packet is not processed, even if the product identification matches but the area identification does not match, the ECM data packet is not processed.

In this embodiment, the first and second storage units can be realized by one memory, which stores the product key of each area and also stores the user key required by the first processing unit 203 and the second processing unit 205 .

The device can be a terminal part in a mobile digital television terminal and a security device inserted into the terminal, wherein the first descrambling unit 304, the first playing unit 305, the second descrambling unit 309, and the second playing unit 310 are composed of The terminal part is realized, and other units are realized by safety devices. In this way, the terminal can automatically obtain the identification of the area to which the user belongs through the feature bit of the security device number, which is considered as the identification of the local area. The central area identifier is fixed at "1", and the non-local and central area identifiers are regarded as roaming area identifiers.

Among them, whether in the local area or the roaming area, in addition to receiving the ECM data packets and digital programs in the local area and the roaming area, it can also receive the ECM data packets and digital programs sent by the front end of the central area, as long as the terminal stores the corresponding products The key can decrypt the ECM data packet, so that the terminal user can watch the program, which brings great convenience to the user.

Example 3

The embodiment of the present invention provides a method for implementing digital TV terminal roaming, the method includes: judging whether the area where the digital TV terminal is currently located is a local area (see step 401); if the judging result is a local area, then receiving the local area The relevant information of the local area sent by the front end, and/or the relevant information of the central area sent by the front end receiving the central area (see step 402); corresponding to the received relevant information of the local area, and/or the relevant information of the central area The processing (see step 403);

Wherein, the relevant information of the local area includes information such as local authorization information, and/or local anti-authorization information, and/or local rate information; the relevant information of the central area includes central authorization information, and/or central anti-authorization information, and/or information such as central rate information.

In this embodiment, in step 401, if the judging result is a roaming area, the method further includes: receiving information about the roaming area sent by the front end of the roaming area (see step 404); The relevant information of the roaming area is correspondingly processed (see step 405); wherein, the relevant information of the roaming area includes roaming authorization information, and/or roaming anti-authorization information, and/or roaming rate information and other information.

According to the above embodiments, the relevant information sent by the front end of the local area, the central area, and the roaming area can be transmitted through EMM data packets.

In the local area, the relevant information of the local area and the central area can be received. For example, when the relevant information is authorization information, the products in the central area can be authorized and deauthorized in the local area; while the products in the central area cannot be authorized in the roaming area And deauthorization, nor can it deauthorize products authorized in the central region authorized in the local region.

In this embodiment, when it is determined that the digital television terminal is in a local area, the manner of processing the received related information is similar to that of Embodiment 1, and will not be repeated here.

When it is determined that the digital television terminal is in a roaming area, the manner of processing the received related information is similar to that of Embodiment 1, and will not be repeated here.

In this way, the digital TV terminal can use the obtained product key to process the received ECM data packet to obtain the corresponding scrambling control word, and use the scrambling control word to descramble the received digital program to play programme.

In this embodiment, taking the relevant information as an EMM data packet as an example, the process of processing the relevant information in step 403 and step 405 is described.

When it is judged that the digital TV terminal is in the local area:

1) When the received relevant information is local authorization information, the information carried in the local EMM data packet includes the local product key identifier and the encrypted local product key, and the relevant information can be processed in the following manner:

Use the pre-embedded local product key ID and user key to decrypt the local authorization information to obtain the local product key; wherein, the local product key ID includes the local area ID and product ID to which the authorized product belongs; the local The product key ID and the local product key are stored.

In this way, when receiving the authorization control information sent by the front end of the local area, it can use the local product key identifier carried in the authorization control information to search, find the matching local product key, and use the local product key to authorize the The control information is decrypted to obtain a local scrambling control word, and the received local digital program is descrambled and played by using the local scrambling control word, so that the terminal user can watch the digital program in the local area.

2) When the received relevant information is local anti-authorization information, processing the relevant information refers to deleting the stored corresponding information according to the product identification and region identification information carried in the local anti-authorization information.

In this way, when receiving the authorization control information sent by the front end in the local area, the local scrambling control word cannot be obtained, so that the terminal user cannot watch the digital program in the local area.

3) When the received relevant information is local rate information, the following methods can be used to process the relevant information, as shown in Figure 5:

Step 501, judging whether the received local rate information already exists;

Step 502, in step 501, if the judgment result is no, then display and store the local rate information;

Wherein, the local rate information includes the identification of the local area to which the rate information belongs, version information, product identification, and/or product price. In this way, the end user can order the product according to the rate information, and only when the product is played, the corresponding fee will be deducted from the wallet. Before playing the product, the ordered product information can also be modified or the ordered product can be deleted according to the rate information.

Step 503, in step 501, if the judgment result is that the received local rate information already exists, then further judge whether the version information of the local rate information is consistent with the stored version information;

Step 504. In step 503, if the judgment result is that the version information is inconsistent, update the stored local rate information, that is, delete the stored rate information, and store the received local rate information.

Step 505, displaying the stored local rate information.

Step 506. In step 503, if the judgment result is that the version information is consistent, discard the received local rate information.

Step 507, displaying the stored local rate information. In this way, the end user can order the product according to the rate information, and only when the product is played, the corresponding fee will be deducted from the wallet. Before playing the product, the ordered product information can also be modified or the ordered product can be deleted according to the rate information.

Example 2, when it is judged that the digital TV terminal is in the local area and the received relevant information is the central authorization information sent by the central area, the central authorization information may include the central product key identifier and the encrypted central product key, and the Relevant information can be processed in the following ways:

The central authorization information is decrypted by using the pre-embedded central product key identification and the user key to obtain the central product key identification and the central product key. In this embodiment, the central product key identifier includes the central region identifier and product identifier to which the authorized product belongs, and the central product key identifier and central product key can be stored. When authorizing control information, you can use the central product key identifier carried by the authorization control information to search, find the matching central product key, use the central product key to decrypt the authorization control information, and obtain the central scrambling control word. The central scrambling control word is used to descramble and play the received central digital program, so that the terminal user can watch the digital program in the central area.

In addition, when receiving the central anti-authorization information and central fee rate information sent by the front end of the central area, the processing method is similar to that of the local area, and will not be repeated here. Moreover, for authorized products in the central region, the authorized product can only be de-authorized in the local region.

In this embodiment, when the digital TV terminal is in a roaming area:

Example 3, when the received relevant information is the roaming authorization information sent by the roaming area, the EMM data packet can carry the roaming product key identifier and the roaming product key, and the following methods can be used to process the relevant information:

The roaming authorization information is decrypted by using the pre-embedded roaming product key identifier and the user key to obtain the roaming product key. In this embodiment, the roaming product key ID includes the roaming area ID and product ID to which the authorized product belongs, and the roaming product key ID and the roaming product key can be stored. When authorizing control information, you can use the product key identifier carried in the authorization control information to search, find the matching roaming product key, use the roaming product key to decrypt the authorization control information, and obtain the roaming scrambling control word. The roaming scrambling control word is used to descramble and play the received roaming digital program, so that the terminal user can watch the digital program in the roaming area.

In addition, when the roaming anti-authorization information and roaming rate information sent by the front end of the roaming area are received, the processing method is similar to that of the local area, and will not be repeated here.

It can be seen from the above that by determining the area where the digital TV terminal is located, the relevant information of the local, central or roaming area is received, and the relevant information is processed so that the terminal user can watch digital programs in different areas, bringing users Great convenience.

In this embodiment, whether in a local area or a roaming area, not only the authorization control information and digital programs of the current area can be received, but also the authorization control information and digital programs of the central area sent by the front end of the central area can be received.

In this embodiment, the authorization control information is an ECM data packet.

In this way, when it is determined in step 401 that the area where the digital television terminal is located is a local area, the method may further include:

Receive the local ECM data packet sent by the front end of the local area. In addition, the central ECM data packet sent by the front end of the central area can also be received in the local area; wherein, the information carried by the local ECM data packet includes the local product key identification and the use of the local The local scrambling control word encrypted by the product key; the information carried by the central ECM data packet includes the central product key identification and the central scrambling control word encrypted by the central product key;

When the local ECM data packet is received, the local product key identifier can be used to search, find the matching pre-stored local product key, and decrypt the received local ECM data packet to obtain the corresponding local scrambling control word; The local scrambling control word descrambles the received local digital program sent by the front end of the local area; the descrambled local digital program is played.

When the central ECM data packet is received, its processing process is similar to that of the local ECM data packet, which will not be repeated here.

In this embodiment, when decrypting the ECM data packet, firstly, the authorized product is compared with the ECM data packet, and only when the product identification and the area identification match can the decryption be performed to obtain the scrambling control word. If the product identification and the area identification do not match, the ECM data packet cannot be decrypted, therefore, the scrambling control word cannot be obtained, and thus the program cannot be played.

In this embodiment, when it is determined in step 401 that the area where the digital television terminal is located is a roaming area, the method may further include:

Receive the roaming ECM data packet sent by the front end of the roaming area. In addition, the central ECM data packet sent by the front end of the central area can also be received in the roaming area; wherein, the information carried in the roaming ECM data packet includes the roaming product key identifier and the use of roaming The roaming scrambling control word encrypted by the product key; the information carried in the central ECM data packet includes the central product key identifier and the central scrambling control word encrypted by the central product key;

When the roaming ECM data packet and the central ECM data packet are received, the processing process is similar to that of the local ECM data packet, which will not be repeated here.

Therefore, no matter in the local area or roaming area, you can receive the ECM data packets and digital programs sent by the headend in the current area; in addition, you can also receive the ECM data packets and digital programs sent by the headend in the central area. If the authorized product is compared with the ECM data packet, and the region identifier and product identifier both match, the corresponding product key can be used to decrypt the ECM data packet to obtain the corresponding scrambling control word. The scrambling control word descrambles the received digital program in the corresponding area and then plays it, so that the end user can watch the TV program, which brings convenience to the user.

In addition, no matter in the local area or the roaming area, you can receive the EMM data packet sent by the front end of the current area and process the data packet; in addition, only in the local area can you receive the EMM data packet sent by the front end of the central area. The EMM data is processed. In the roaming area, the EMM packets sent by the front end of the central area cannot be processed.

However, in the roaming area, the received central ECM data packet can be decrypted according to the pre-stored central product key to obtain the scrambling control word, so as to descramble the central digital program and then play it. If the central product is not authorized in the local area, that is, there is no corresponding central product key, even when the central ECM data packet is received in the roaming area, the ECM data packet cannot be decrypted, and the central digital program cannot be played .

In this embodiment, since each area can receive the programs of the central area, in this embodiment, the central product key used to encrypt the central scrambling control word is unique. When the central product authorization package is received locally, The central program can be watched locally or roamed.

Taking the device as a mobile digital TV terminal and the user of the digital TV terminal as a local user as an example, the present invention will be described with several examples.

Example 4

After the terminal roams from place A to place B, after receiving the encrypted authorization information sent by the front end of the place B, decrypt the encrypted authorization information to obtain authorization; after receiving the encrypted anti-authorization information, decrypt the encrypted anti-authorization information The message cancels the last authorization obtained.

In this way, the terminal can receive the authorization information and anti-authorization information sent by the front end of the current area according to the area where it is located.

Example 5

When the terminal roams from place A to place B, the terminal user sets the receiving frequency point of the terminal from place A to the corresponding frequency point of place B to receive data. At this time, the terminal can no longer receive the data sent by the front end of place A. data pack.

When the terminal receives the scrambled digital program sent by the front end of the second place, the terminal cannot descramble the digital program because it does not have the authorization of the second place's program; the terminal can only watch the second place's program if it is authorized by the second place's front end. At this time, the terminal user can notify the front end of site B to send the product authorization information corresponding to the terminal of site A user, that is, the EMM data packet. The terminal filters its own EMM package and sends the corresponding EMM package to the security device. The device decrypts with the pre-embedded user key to obtain the B product key in the EMM package; uses the B product key to decrypt the ECM data package received and sent to the security device to obtain the ECM package The scrambling control word in the security device gives the decrypted scrambling control word to the mobile terminal, and uses it to complete the descrambling of the digital program and play the digital program.

It can be seen from the above that no matter whether the mobile digital TV terminal is in the local area or the roaming area, it can receive the programs and ECM packets sent by the front-end in the current area and the central area. As long as the terminal has the corresponding program authorization, it can watch the programs, bringing users Come conveniently.

Example 5

The terminal has authorized a certain product 1 in the central area when it is in A, and obtained the product key of the product 1. When the terminal roams from A to B, it can receive the ECM data packet sent by the front end of the central area. , since the product 1 has been authorized at site A, the ECM data packet can be decrypted at site B according to the obtained product key to obtain the scrambling control word, and use the scrambling control word to descramble the central digital program and play.

If the terminal does not authorize the product 1 in the central area when it is in place A, then when the terminal roams from place A to place B, after receiving the ECM data packet sent by the front end of the central region, the ECM data packet cannot be authorized. After decryption, the scrambling control word cannot be obtained, so the program cannot be played.

In addition, after the terminal in place A arrives in place B, it can no longer receive the product authorization sent by the central area.

Example 6

When the terminal roams from place A to place B, it can receive the authorization of one or more products of place B sent by the security device of the terminal in place B, and the terminal in place B can receive the products sent by the front end of place B Authorized, and can watch the program corresponding to this product.

When the user in place A goes to place B and then transfers to place C, and there is already an authorized product in place B, the product is identified as A. The terminal in A to C, determines the authority to play the authorized product through the regional identification and product identification. When the terminal in A arrives from B to C, it will receive the ECM data packet sent by the front end of C in real time, and the ECM data packet will be received by the security device Compared with the authorized products received, the programs corresponding to the authorized products can be played only when the regional identification and the product identification completely match. Because the region identifications of C and B are different, even if the user of A goes to C, even if the authorized product of B is included, the product identification is A, because of the different area identifications, the program of A product identification of C cannot be played.

Example 7

The terminal roams from place A to place B. The terminal has received the authorized product sent by the front end of place B. At this time, the front end of place B sends the anti-authorization information of the product. After receiving the anti-authorization information, the terminal cannot continue to play this Product Licensing Program.

Example 8

For the front end of the central area, after the central product authorization is sent to the terminal, the corresponding product key can be stored. When the terminal roams from place A to place B, and any other roaming area, the user of place A can watch the authorized central program in any area. When the terminal roams from A to any roaming area, it will not be able to cancel the centrally authorized product through the front end of the roaming area.

If the front end of the central area does not send the central product authorization for the terminal in place A, then the terminal cannot obtain the corresponding product key. When the terminal roams from place A to place B, it will not be able to apply for centrally authorized products through the front end of place B.

Example 9

In this embodiment, after the terminal is started, before receiving the new rate information, it first displays the local rate information stored on the mobile terminal.

When the terminal is in location A, it can receive rate information sent by the front end of location A and the central area, display and store the rate information. When the terminal roams to B, it can receive the rate information sent by the front end of B, and can display and store the rate information.

Example 10

When the terminal is in place A, it can receive the central or local rate information sent by the front end of the central and local areas, and judge whether the central or local rate information has been stored on the mobile terminal. If the rate information is stored, compare the new Whether the version of the rate information is consistent with the version of the central or local rate information stored on the mobile terminal, if it is consistent, no new rate information will be received again, and the stored central or local rate information will be displayed at the same time; if it is inconsistent or the terminal does not have Store the corresponding tariff information, then receive and store new tariff information, delete the corresponding old tariff information, and display the newly received central or local tariff information.

If the terminal roams from place A to place B, it receives the rate information sent by the front end of the roaming area, and judges whether the roaming rate information has been stored on the terminal. If there is rate information stored, compare the area in the new rate information Whether the identification and version are consistent with the area identification and version of the roaming rate information stored on the mobile terminal. Only when the area identification and version information are completely consistent, will no new rate information be received, and the stored roaming rate information will be displayed at the same time Information content; when the two are not completely consistent or the mobile terminal does not store the roaming rate information, it will receive and store the new roaming rate information, the corresponding old roaming rate information will be deleted, and the newly received roaming rate information will be displayed at the same time Land rate information content. For example, after a user in place A roams to place B, the local area, that is, the tariff information of place A is saved.

In this embodiment, after the digital television terminal receives the tariff information of the second land, it displays the second land tariff information. On the user interface of the mobile terminal, the user can browse the content of the rate information of B, and the user decides whether to order the rate product according to the product name, description and price in the rate information. After the user has ordered a product, if the ordered program has not reached its broadcast time, the ordered product enters the scheduled product list in the user interface, and the products in the list can be browsed and canceled. When the ordered program reaches its playing time, the mobile terminal will deduct the corresponding program viewing amount from the wallet account of the user security device. If the wallet account has sufficient funds, the deduction is successful, and the user can watch the ordered rate program; If the balance is insufficient, the deduction fails, and the terminal prompts the user that the wallet balance is insufficient, and the program cannot be watched at the subscribed rate.

For example, when a terminal in place A roams to place B, after receiving the rate information of place B, it displays the rate information of place B and saves the rate information of place A; when the user roams from place B to other roaming areas, such as When land, when the rate information of land C is received, the rate information of land C will be displayed, and the rate information of land B can be deleted. Ensure that only one set of roaming rate information is displayed and stored.

It can be seen from the above that, for the tariff information, the terminal can save the local tariff information, and can also save the tariff information of the current roaming area, and can delete the tariff information of other roaming areas.

For example, when a user in place A roams to place B, the rate information of place A is displayed before receiving the rate information of place B.

In this embodiment, no matter in the local area or in the roaming area, when the user restarts the mobile digital TV terminal, the rate information of the local area can be preset to be displayed. After the mobile terminal receives the rate information of a certain area, the terminal user can order the program by himself according to the above-mentioned method, so as to realize program viewing.

When the rate information displayed by the mobile terminal is local or central rate information, the terminal can order local or central programs, and the wallet account in the security device can watch local or central programs after successful deduction.

When the tariff information displayed by the mobile terminal is the tariff information of the roaming destination, the terminal can subscribe to the roaming destination program by itself, and the roaming destination program can be watched after the wallet account of the security device successfully debits the fee.

It can be seen from the above embodiments that by determining the area where the digital TV terminal is located, the relevant information of the local, central or roaming area is received, and the relevant information is processed so that the terminal user can watch digital programs in different areas, giving the user Bring great convenience.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the scope of the present invention. Protection scope, within the spirit and principles of the present invention, any modification, equivalent replacement, improvement, etc., shall be included in the protection scope of the present invention.

Claims (15)

1. A method for realizing digital television terminal roaming, characterized in that the method comprises: judging whether the area where the digital TV terminal is currently located is a local area; If the judgment result is a local area, receiving relevant information of the local area sent by the front end of the local area, and/or receiving relevant information of the central area sent by the front end of the central area; Perform corresponding processing on the received relevant information of the local area and/or the relevant information of the central area; Wherein, the relevant information of the local area includes local authorization information, and/or local anti-authorization information, and/or local rate information; the relevant information of the central area includes central authorization information, and/or central anti-authorization information, and/or central rate information; If the judging result is a roaming area, the method further includes: receiving information about the roaming area sent by the front end of the roaming area; Perform corresponding processing on the received relevant information of the roaming area; The relevant information of the roaming area includes roaming authorization information, and/or roaming anti-authorization information, and/or roaming rate information; When the relevant information sent by the front end receiving the roaming area is roaming authorization information, the corresponding processing of the received information related to the roaming area includes: Decrypt the roaming authorization information according to the pre-stored user key to obtain a roaming product key identifier and a roaming product key; wherein the roaming product key identifier includes a roaming area identifier and a product identifier to which the authorized product belongs; The roaming product key identifier and the roaming product key of the roaming area are stored. 2. The method according to claim 1, wherein when the relevant information sent by the front end receiving the local area is local authorization information, the received relevant information of the local area is processed accordingly ,include: Decrypt the local authorization information according to the pre-stored user key to obtain a local product key identifier and a local product key; wherein the local product key identifier includes a local area identifier and a product identifier to which the authorized product belongs; storing the local product key identification and local product key for the local area. 3. The method according to claim 1, wherein when the relevant information sent by the front end receiving the central area is central authorization information, the received relevant information of the central area is processed accordingly ,include: Decrypt the central authorization information according to the pre-stored user key to obtain a central product key identifier and a central product key; wherein the central product key identifier includes a central region identifier and a product identifier to which the authorized product belongs; The central product key identification and the central product key of the central area are stored. 4. The method according to claim 1, wherein if the judgment result is a local area, the method further comprises: Receive local authorization control information sent by the front end of the local area, and/or receive central authorization control information sent by the front end of the central area; wherein, the information carried in the local authorization control information includes the local product key identifier and the local product key identifier. The local scrambling control word encrypted by the key; the information carried by the central authorization control information includes the central product key identifier and the central scrambling control word encrypted by the central product key; Use the pre-stored local product key identifier and local product key, and/or the central product key identifier and the central product key to respectively decrypt the received local authorization control information and/or central authorization control information to obtain local scrambling control word, and/or central scrambling control word; Wherein, the local product key identifier includes a local region identifier and a product identifier to which the authorized product belongs; the central product key identifier includes a central region identifier and a product identifier to which the authorized product belongs. 5. method according to claim 4, is characterized in that, described method also comprises: Using the local product key identification and local scrambling control word, and/or the central product key identification and the central scrambling control word to receive the local digital program sent by the front end of the local area, and/or the central area Descramble the central digital program sent by the front end; and playing the descrambled local digital program and/or central digital program. 6. The method according to claim 1, wherein if the judgment result is a roaming area, the method further comprises: Receive roaming authorization control information sent by the front-end of the roaming area, and/or receive central authorization control information sent by the front-end of the central area; wherein, the information carried in the roaming authorization control information includes a roaming product key identifier and a roaming product The roaming scrambling control word encrypted by the key; the information carried by the central authorization control information includes the central product key identifier and the central scrambling control word encrypted by the central product key; Use the pre-stored roaming product key identifier and roaming product key, and/or the central product key identifier and the central product key to respectively decrypt the received roaming authorization control information, and/or the central authorization control information, to obtain roaming scrambling control word, and/or central scrambling control word; Wherein, the roaming product key ID includes the roaming area ID and the product ID to which the authorized product belongs; the central product key ID includes the central area ID and the product ID to which the authorized product belongs. 7. The method according to claim 6, further comprising: Use the roaming product key identifier and roaming scrambling control word, and/or the central product key identifier and the central scrambling control word to receive the roaming digital program sent by the front end of the roaming area, and/or the central area Descramble the central digital program sent by the front end; Playing the descrambled roaming digital program and/or central digital program. 8. The method according to claim 1, wherein when receiving the relevant information sent by the front-end in the local area is local rate information, or receiving the relevant information sent by the front-end in the central area is central rate information , or when receiving the relevant information sent by the front end of the roaming area is roaming rate information, performing corresponding processing on the received relevant information, including: judging whether the received local rate information, or central rate information, or roaming rate information already exists; If the judgment result is no, storing and/or displaying the local rate information, or the central rate information, or the roaming rate information; Wherein, the local rate information includes the local area identification, version information, product identification, and/or product price to which the rate information belongs; the central rate information includes the central area identification to which the rate information belongs, Version information, product identification, and/or product price; the roaming rate information includes the roaming area identification, version information, product identification, and/or product price to which the rate information belongs. 9. The method according to claim 8, wherein if the judgment result is yes, the method further comprises: Further judging whether the received version information of the local rate information, or the central rate information, or the roaming rate information is consistent with the stored version information; If the judgment results are inconsistent, updating the stored local rate information, central rate information, or roaming rate information; If the judging results are consistent, the received local rate information, or central rate information, or roaming rate information is discarded. 10. The method according to claim 8, characterized in that, after displaying the local rate information, or the central rate information, or the roaming rate information, the method further comprises: The digital program in the local area, or the central area, or the roaming area is reserved according to the local rate information, or the central rate information, or the roaming rate information. 11. A device for realizing roaming of a digital television terminal, characterized in that the device comprises: A first judging unit, the first judging unit is used to judge whether the area where the digital TV terminal is currently located is a local area; The first receiving unit, if the judgment result is a local area, then receive the relevant information of the local area sent by the front end of the local area, and/or receive the relevant information of the central area sent by the front end of the central area; A first processing unit, configured to perform corresponding processing on the received relevant information of the local area and/or the received relevant information of the central area; Wherein, the relevant information of the local area includes local authorization information, and/or local anti-authorization information, and/or local rate information; the relevant information of the central area includes central authorization information, and/or central anti-authorization information, and/or central rate information; The device also includes: A fourth receiving unit, if the judgment result of the first judging unit is a roaming area, the fourth receiving unit is configured to receive the roaming authorization control information sent by the front end of the roaming area, and/or receive the roaming authorization control information sent by the front end of the central area. Central authorization control information; wherein, the information carried in the roaming authorization control information includes the roaming product key identifier and the roaming scrambling control word encrypted with the roaming product key; the information carried in the central authorization control information includes the central product identification and a central scrambled control word encrypted with a central product key; A fourth processing unit, the fourth processing unit uses the pre-stored roaming product key identifier and roaming product key, and/or the central product key identifier and the central product key to pair the received roaming authorization control information, and/or Or decrypt the central authorization control information to obtain the roaming scrambling control word and/or the central scrambling control word; Wherein, the roaming product key ID includes the roaming area ID and the product ID to which the authorized product belongs; the central product key ID includes the central area ID and the product ID to which the authorized product belongs; A second storage unit, the second storage unit is used to store the roaming product key identifier, roaming product key, and roaming scrambling control word. 12. The device according to claim 11, wherein the device further comprises: The second receiving unit, if the judgment result of the first judging unit is a roaming area, the second receiving unit is configured to receive information about the roaming area sent by the front end of the roaming area; a second processing unit, configured to perform corresponding processing on the received related information of the roaming area; Wherein, the relevant information of the roaming area includes roaming authorization information, and/or roaming anti-authorization information, and/or roaming rate information. 13. The device according to claim 11, further comprising: A third receiving unit, if the judgment result of the first judging unit is a local area, the third receiving unit is configured to receive the local authorization control information sent by the front end of the local area, and/or receive the front end of the central area The central authorization control information sent; wherein, the information carried in the local authorization control information includes the local product key identifier and the local scrambling control word encrypted with the local product key; the information carried in the central authorization control information includes the central product key identification and central scrambling control word encrypted with the central product key; A third processing unit, the third processing unit is configured to use the pre-stored local product key identifier and local product key, and/or the central product key identifier and the central product key to pair the received local authorization control information, and/or the central authorization control information are respectively decrypted to obtain the local scrambling control word and/or the central scrambling control word; Wherein, the local product key identifier includes the local region identifier and the product identifier to which the authorized product belongs; the central product key identifier includes the central region identifier and the product identifier to which the authorized product belongs; A first storage unit, the first storage unit is used to store the local product key identifier and the local product key, the central product key identifier and the central product key, the local scrambling control word and the central scrambling control word. 14. The device according to claim 13, further comprising: A first descrambling unit that uses the local product key identification and local scrambling control word, and/or the central product key identification and central scrambling control word to pair the received local area descrambling of the local digital programs sent by the front-end of the network, and/or the central digital programs sent by the head-end of the central region; A first playing unit, configured to play the descrambled local digital program and/or central digital program. 15. The device according to claim 11, further comprising: The second descrambling unit is configured to use the roaming product key identifier and the roaming scrambling control word, and/or the central product key identifier and the central scrambling control word pair to receive the descrambling of the roaming digital program sent by the front end of the roaming area, and/or the central digital program sent by the head end of the central area; A second playing unit, the second playing unit is used to play the descrambled roaming digital program and/or central digital program.

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