CN106803979B - A method and system supporting simultaneous descrambling of multiple programs - Google Patents

Abstract

The invention discloses a kind of method and system for supporting multiple programs while descrambling, the method includes the steps: the data of CAT Conditional Access Table described in CA kernel processes and Program Map Table, notice CA middleware unwind the data channel for disturbing required reception Entitlement Management Message and Entitlement Control Message；CA middleware finds corresponding bottom data channel ID according to the index, and the data channel for receiving Entitlement Management Message and Entitlement Control Message needed for multiple programs respectively descramble is opened up on corresponding bottom data channel and the descrambling channel of audio-video control word is arranged.The method of the invention can make CA preferably support application extension, and influence very little to the modification of CA middleware section when application extension, more rapid can integrate and be related to the function of multi-data processing, compatibility is stronger；The present invention can make existing CA no longer limit the extension of application, can handle multiple programs and multiple program informations simultaneously while manage, can be applied to several scenes.

Description

A method and system supporting simultaneous descrambling of multiple programs

technical field

The invention relates to the technical field of set-top boxes, in particular to a method and system for simultaneously descrambling multiple programs.

Background technique

Nowadays, digital set-top boxes have spread in every household and become a platform for the public to obtain real-time information, leisure and entertainment. People have higher and higher requirements for the service and program quality of set-top boxes. The scrambled program can only be watched after the authorization, and it is one of the basic functions of the set-top box to enable the user to watch the scrambled program after purchasing the authorization.

At present, after almost all set-top box manufacturers cooperate with CA (Conditional Access, Conditional Access) manufacturers, they can enable end users to watch descrambled programs. However, it only supports processing one channel of data, that is, live video. Both the application and the CA middleware (middleware) only process one channel of data, or process information according to the default data channel. It greatly limits the expansion of the application, so that many functions of the application need to be modified by the middleware when developing the software. Moreover, with the emergence of functions such as recording playback (PVR), picture-in-picture (PIP), and fast channel switching (FCC) without black screens required by users, set-top box manufacturers need to implement multi-channel descrambling and multi-channel message management. Users can watch multiple programs at the same time or switch channels without waiting, and watch directly after switching channels, which will also become a major selling point of the set-top box.

Therefore, the prior art still needs to be improved and developed.

Contents of the invention

The technical problem to be solved by the present invention is to provide a method and system that supports simultaneous descrambling of multiple programs in view of the above-mentioned defects of the prior art. The shortcoming of controlling the status of the live program and the problem of limiting the extension function of the application.

The technical solution adopted by the present invention to solve technical problems is as follows:

A method for supporting simultaneous descrambling of multiple programs, comprising the steps of:

When a user starts a program, the conditional access table and program mapping table corresponding to the program and other programs, as well as the applications, CA Correspondence between the middleware and the underlying data channel, and notify the CA middleware; wherein, the corresponding relationship includes the underlying data channel ID, data source handle;

The CA middleware opens up resources to save the received conditional access table, program mapping table and the corresponding relationship, and stores the respective underlying data channel IDs and data source handles of the multiple programs in corresponding array elements, and then Using the subscript variable of the array element as an index, and associating the conditional access table, the program mapping table and the corresponding relationship corresponding to the plurality of programs with the corresponding index;

The CA middleware uses the index as the parameter of calling the CA kernel open resource interface, opens the kernel resource, and obtains the program handle of the plurality of programs that the CA kernel creates; simultaneously, the conditional access table and the program mapping table are sent to the CA kernel, and associating the program handles of the plurality of programs with the corresponding indexes;

The CA kernel processes the data of the conditional access table and the program mapping table, and notifies the CA middleware to open and descramble the required data channels for receiving authorization management information and authorization control information; the CA middleware finds the corresponding index according to the multiple programs respectively Corresponding bottom layer data channel ID, open up the data channel for receiving authorization management information and authorization control information required for the respective descrambling of the plurality of programs on the corresponding bottom layer data channel, and set the descrambling channel of the audio and video control word;

According to the data in the conditional access table and the program mapping table, the CA core obtains the authorization management information and authorization control information from the underlying driver through the data channel for receiving the authorization management information and authorization control information, and passes the multiple program After descrambling the multiple programs, the respective descrambling channels notify the CA middleware of the statuses of the multiple programs; the CA middleware notifies the application of corresponding status processing according to the index.

The method for supporting simultaneous descrambling of multiple programs, wherein the correspondence between the applications, CA middleware, and underlying data channels that are respectively related to the multiple programs includes:

The corresponding relationship between the application and the CA intermediate and underlying data channel, the members are the data source handle, the underlying data channel ID, and the identifier being used;

The corresponding relationship between CA middleware and applications, the members are the identifier in use, player handle, data source type, error code, audio status, and video status.

The method for supporting simultaneous descrambling of multiple programs, wherein the CA middleware allocates resources to save the received conditional access table, program mapping table, and the corresponding relationship, and transfers the underlying data channels of the multiple programs to The ID and the data source handle are respectively stored in corresponding array elements, and then the subscript variable of the array element is used as an index, and the conditional access table, program mapping table and the corresponding relationship corresponding to the plurality of programs are The steps of respectively associating the corresponding indexes include the following steps:

After the CA middleware receives the conditional access table, the program mapping table and the corresponding relationship, it judges respectively whether the underlying data channel IDs and data source handles of the multiple programs have been stored in the array elements of the CA middleware;

When the underlying data channel IDs and data source handles of the multiple programs do not exist in the array elements of the CA middleware, store the respective underlying data channel IDs and data source handles of the multiple programs respectively In the unused array element, the subscript variable of the array element is used as an index, and the conditional access table, the program mapping table and the corresponding relationship of the plurality of programs are respectively associated with the corresponding above index.

The method for supporting simultaneous descrambling of multiple programs, wherein, when the respective underlying data channel IDs and data source handles of the multiple programs do not exist in the array elements of the CA middleware, the multiple The respective underlying data channel IDs and data source handles of the programs are respectively stored in unused array elements, and then the subscript variable of the array elements is used as an index, and the conditional access table corresponding to the multiple programs is The step of associating the corresponding index with the program mapping table and the corresponding relationship includes the following steps:

When the underlying data channel IDs and data source handles of the multiple programs do not exist in the array elements of the CA middleware, store the respective underlying data channel IDs and data source handles of the multiple programs respectively in an unused array element, then use the subscript variable of said array element as an index;

The index is used as the subscript variable of the data source type, the player handle, and the array of the identity being used to save the application sent to the CA middleware;

The index is used as a subscript variable of an array storing the conditional access table and the program mapping table.

The method for supporting simultaneous descrambling of multiple programs, wherein the CA middleware uses the index as a parameter for calling the CA kernel open resource interface, opens the kernel resource, and obtains the program handle for the CA kernel to create the multiple programs; at the same time The conditional access table and the program mapping table are sent to the CA core, and the steps of associating the program handles of the plurality of programs with the corresponding indexes specifically include the steps:

The CA middleware respectively judges whether the conditional access table and program mapping table associated with the index corresponding to the plurality of programs are the same as the conditional access table and program mapping table received last time;

When the conditional access table and program mapping table associated with the index corresponding to the multiple programs are different from the conditional access table and program mapping table received last time, the CA middleware uses the index as a resource for calling the CA kernel The parameters of the interface, open the kernel resources, obtain the program handles of the multiple programs created by the CA core; simultaneously send the conditional access table and the program mapping table to the CA core, and associate the program handles of the multiple programs with the corresponding the index.

A system supporting simultaneous descrambling of multiple programs, comprising:

The data acquisition module is used to obtain the conditional access table and program mapping table respectively corresponding to multiple programs including the program and other programs from the underlying drive through the underlying data channel when the user starts a program, as well as the Corresponding relationships between relevant applications, CA middleware, and underlying data channels, and notify the CA middleware; wherein, the corresponding relationship includes the underlying data channel ID and data source handle;

The index association module is used for CA middleware to open up resources and save the received conditional access table, program mapping table and the corresponding relationship, and store the respective underlying data channel IDs and data source handles of the multiple programs in the corresponding In the array element, then the subscript variable of the array element is used as an index, and the conditional access table, the program mapping table and the corresponding relationship corresponding to the plurality of programs are respectively associated with the corresponding index;

The core resource opening module is used for the CA middleware to use the index as the parameter of calling the CA core open resource interface, open the core resource, and obtain the program handle of the plurality of programs created by the CA core; simultaneously the conditional access table, the program The mapping table sends the CA core, and associates the program handles of the plurality of programs with the corresponding indexes;

The channel opens up the module, is used for CA kernel to process the data of described conditional access table and program mapping table, informs CA middleware to open the data channel of receiving authorization management information and authorization control information required for descrambling; CA middleware according to the multiple The index corresponding to each program finds the corresponding underlying data channel ID, opens up the data channels for receiving authorization management information and authorization control information required for the respective descrambling of the plurality of programs on the corresponding underlying data channel, and sets the audio and video control word descrambling channel;

The descrambling module is used for the CA core to acquire the authorization management information and the authorization control information from the underlying driver through the data channel for receiving the authorization management information and the authorization control information according to the data in the conditional access table and the program mapping table, and After descrambling the multiple programs through the respective descrambling channels of the multiple programs, notify the CA middleware of the states of the multiple programs; the CA middleware notifies the application according to the index to make a corresponding response state handling.

In the system supporting simultaneous descrambling of multiple programs, the corresponding relationship among the applications, CA middleware, and underlying data channels respectively related to the multiple programs includes:

The corresponding relationship between the application and the CA intermediate and underlying data channel, the members are the data source handle, the underlying data channel ID, and the identifier being used;

The corresponding relationship between CA middleware and applications, the members are the identifier in use, player handle, data source type, error code, audio status, and video status.

In the system supporting simultaneous descrambling of multiple programs, the index association module specifically includes:

The first judging unit is used for CA middleware to judge respectively whether the underlying data channel IDs and data source handles of the multiple programs have been stored in the CA after receiving the conditional access table, the program mapping table and the corresponding relationship. In the array element of the middleware;

An index associating unit, configured to associate the respective underlying data channel IDs of the multiple programs when the respective underlying data channel IDs and data source handles of the multiple programs do not exist in the array elements of the CA middleware , data source handles are respectively stored in unused array elements, and then the subscript variable of the array element is used as an index, and the conditional access table, program mapping table and the corresponding relationship corresponding to the plurality of programs are stored are respectively associated with the corresponding indexes.

In the system supporting simultaneous descrambling of multiple programs, the index association unit specifically includes:

An index generating unit, configured to use the respective underlying data channel IDs of the multiple programs when the respective underlying data channel IDs and data source handles of the multiple programs do not exist in the array elements of the CA middleware , the data source handle is respectively stored in unused array elements, and then the subscript variable of the array element is used as an index;

The first association unit is used to use the index as the subscript variable of the data source type, the player handle, and the array of the identity being used to save the application sent to the CA middleware;

The second associating unit is configured to use the index as a subscript variable of an array storing the conditional access table and the program mapping table.

The method for supporting simultaneous descrambling of multiple programs, wherein the kernel resource enabling module specifically includes:

The second judging unit is used for the CA middleware to respectively judge whether the conditional access table and program mapping table associated with the index corresponding to the plurality of programs are the same as the conditional access table and program mapping table received last time;

The kernel resource opening unit is used for when the conditional access table and program mapping table associated with the index corresponding to the plurality of programs are different from the conditional access table and program mapping table received last time, the CA middleware will The index is used as the parameter of calling the CA kernel to open the resource interface, and the kernel resource is opened to obtain the program handle of the plurality of programs created by the CA kernel; simultaneously, the conditional access table and the program mapping table are sent to the CA kernel, and the plurality of programs are sent to the CA kernel. The program handles are respectively associated with the corresponding indexes.

In summary, the present invention provides a method and system that supports simultaneous descrambling of multiple programs. The method of the present invention enables CA to better support application expansion, and the modification of the CA middleware part during application expansion affects It is very small, and can more quickly integrate functions related to multi-channel data processing, and has stronger compatibility; the present invention can make the existing CA no longer limit the expansion of applications, and can simultaneously process multiple programs and manage multiple program messages at the same time , which can be applied to various scenarios.

Description of drawings

Fig. 1 is a flowchart of a preferred embodiment of the method for supporting simultaneous descrambling of multiple programs in the present invention.

Fig. 2 is a brief flow chart of the method for supporting simultaneous descrambling of multiple programs in the present invention.

Fig. 3 is a flowchart of a specific application embodiment of the method for supporting simultaneous descrambling of multiple programs according to the present invention.

Fig. 4 is a functional block diagram of a preferred embodiment of the system supporting simultaneous descrambling of multiple programs according to the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention more clear and definite, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

Please refer to FIG. 1. FIG. 1 is a flow chart of a preferred embodiment of the method for supporting simultaneous descrambling of multiple programs in the present invention. The method for supporting simultaneous descrambling of multiple programs shown in Figure 1 includes:

Step S100, when the user starts a program, simultaneously obtain the conditional access table and program mapping table corresponding to the program and other programs from the bottom drive through the bottom data channel, and the corresponding Correspondence between application, CA middleware, and underlying data channel, and notify CA middleware; wherein, said corresponding relationship includes underlying data channel ID, data source handle;

Step S200, the CA middleware opens up resources to save the received conditional access table, program mapping table and the corresponding relationship, and saves the respective underlying data channel IDs and data source handles of the multiple programs in corresponding array elements In the method, the subscript variable of the array element is then used as an index, and the conditional access table, program mapping table and the corresponding relationship of the plurality of programs are respectively associated with the corresponding index;

Step S300, the CA middleware uses the index as a parameter for calling the CA kernel open resource interface, opens the kernel resource, and obtains the program handle of the plurality of programs created by the CA kernel; simultaneously sends the conditional access table and the program mapping table to the CA a kernel, and associating the program handles of the plurality of programs with the corresponding indexes;

Step S400, the CA core processes the data of the conditional access table and the program mapping table, and notifies the CA middleware to open the data channel for receiving authorization management information and authorization control information required for descrambling; the CA middleware corresponds to each of the multiple programs according to the index to find the corresponding underlying data channel ID, open up the data channels for receiving authorization management information and authorization control information required for the respective descrambling of the plurality of programs on the corresponding underlying data channel, and set the descrambling of the audio and video control words aisle;

Step S500, the CA core obtains the authorization management information and authorization control information from the underlying driver through the data channel for receiving the authorization management information and authorization control information according to the data in the conditional access table and the program mapping table, and passes the The respective descrambling channels of the multiple programs descramble the multiple programs respectively, and notify the CA middleware of the statuses of the multiple programs; the CA middleware notifies the application of corresponding status processing according to the index.

The method of the present invention is proposed based on the background of multiplexing of multiple data distributors (DMUX) or data distributors. The key is that the management of multiple data will not interfere with each other, and the resources created by the upper layer or the bottom layer can be Great articulation and handling. The method for supporting simultaneous descrambling of multiple programs provided by the present invention enables the application to freely add functions related to multi-channel descrambling, such as recording and playback (PVR), picture-in-picture (PIP), fast channel switching without black screen (FCC) )Wait.

To put it simply, the present invention realizes that when a user starts a program, he not only receives the conditional access table, program mapping table and the corresponding relationship of the program, but also receives the conditional access table and program mapping table of other programs at the same time. and the corresponding relationship, the conditional access tables and program mapping tables of multiple programs including the program and other programs are sent to the CA middleware at the same time, and the descrambling channels corresponding to each program are opened for simultaneous descrambling, so that recording can be realized Playback (PVR), picture-in-picture (PIP), fast channel cut (FCC) without black screen and other functions. Among them, the picture-in-picture can watch two programs at the same time, and the fast channel switching without black screen is because when one program is turned on, other programs are also descrambled at the same time, and the descrambled data can be directly called when switching channels , so no black screen appears.

It should be noted that the other programs refer to the programs supported by the set-top box other than the program currently opened by the user, which may be several programs adjacent to the program, or the programs that are opened simultaneously when the user starts a program. The other programs may also be other programs pre-associated with the program started by the user.

In this embodiment, the application is a man-machine interface, that is, a UI interactive interface, as shown in FIG. The conditional access table and program mapping table corresponding to the program and multiple programs of other programs, and the correspondence between the applications, CA middleware, and underlying data channels respectively related to the multiple programs, and notify the CA middleware ; Wherein, the corresponding relationship includes the underlying data channel ID, data source handle; that is to say, when the user opens a program, such as live broadcast, the man-machine interface terminal not only obtains the corresponding conditions of the program from the underlying driver through the underlying data channel The corresponding relationship between the receiving table (conditional accesstable, CAT) and the program mapping table (Program Map Table, PMT) and the application related to the program, CA middleware, and the underlying data channel (corresponding to step ① in Figure 2), And notify the CA middleware (corresponding to step ② in Figure 2), and also carry out the same process for other programs at the same time. Wherein, the underlying data channel is a data transmission channel of an underlying driver (HDI).

During the specific implementation, when the application starts a certain function, such as live broadcast, it notifies the update of the CA middleware table data (data). The important tables related to the program are PMT and CAT tables, and the application will notify the table of the underlying data channel ID, Data source handle, data source type, player handle; at the same time, the same process as this program is performed on other programs. Wherein, each underlying data channel ID and data source handle corresponds to a program.

In this embodiment, the corresponding relationship among the applications, CA middleware, and underlying data channels related to the multiple programs includes: 1), the corresponding relationship between applications and CA intermediate and underlying data channels, and the members are Data source handle, underlying data channel ID (identification number), the identity being used; 2), the corresponding relationship between CA middleware and applications, the members are the identity being used, player handle, data source type, error code (CA error code), audio status, video status. Wherein, the data source type is an enumerated data source type, such as live broadcast, picture-in-picture, fast channel switching without black screen, recording and playback, etc.

In the step S200, the CA middleware allocates resources to save the received conditional access table, program mapping table and the corresponding relationship, and saves the respective underlying data channel IDs and data source handles of the multiple programs in the In the corresponding array element, the subscript variable of the array element is then used as an index, and the conditional access table, the program mapping table and the corresponding relationship corresponding to the plurality of programs are respectively associated with the corresponding index ; That is to say, the CA middleware not only opens up resources to save the conditional access table, program mapping table and underlying data channel ID, data source handle, data source type, and player handle corresponding to the received program, but also stores the underlying data channel ID The data source handle is stored in an array element, and then the subscript variable of the array element is used as an index (index), and the conditional access table, program mapping table, and underlying data channel ID, data source handle, and data source type , the player handle are all associated with the index, and the same process is also performed on other programs in the plurality of programs at the same time. The difference is that each program is associated with its corresponding index.

During specific implementation, the CA middleware can open up resources for each program by opening up a structure array to save important information of the application, the CA middleware, the CA kernel, and the underlying driver. For example, five structure arrays can be opened up for each of the plurality of programs: structure array 1, structure array 2, structure array 3, structure array 4, and structure array 5; Body array 1 is used to save the corresponding relationship between the application and CA middleware and the underlying data channel. It is the flag in use, player handle, enumerated data source type, CA error code, audio status, and video status; set the structure array 3 to save the program message correspondence between the CA core and the CA middleware , the members are the ID of the resource opened by the CA core and the handle generated by the open resource; set the structure array 4 and the structure array 5 to save the PMT table and the CAT table respectively.

Further, the step S200 specifically includes:

Step S210, after the CA middleware receives the conditional access table, the program mapping table and the corresponding relationship, it judges respectively whether the respective underlying data channel IDs and data source handles of the multiple programs have been stored in the array of the CA middleware In the element; during specific implementation, when the CA middleware receives the bottom data channel ID and the data source handle, it judges respectively whether the corresponding bottom data channel ID and data source handle of the multiple programs have been stored in the middle of the CA In the array element of the program, it is judged respectively whether resources have been allocated for the underlying data channel ID and data source handle corresponding to each of the multiple programs.

Step S220, when the respective underlying data channel IDs and data source handles of the multiple programs do not exist in the array elements of the CA middleware, set the respective underlying data channel IDs and data source handles of the multiple programs to The handles are respectively stored in unused array elements, and then the subscript variable of the array elements is used as an index, and the conditional access table, program mapping table and the corresponding relationship corresponding to the plurality of programs are respectively associated corresponding to the index. During specific implementation, when the underlying data channel ID and data source handle corresponding to a certain program in the plurality of programs do not exist in the array elements of the CA middleware, it means that there is no previous response to the underlying data channel ID and data source handle. The source handle has opened up resources; at this time, the CA middleware traverses in the structure array 1 to find unused array elements, saves the data source handle and underlying data channel ID notified by the application in the unused array elements, and puts the The subscript variable of the array element is returned as an index; when the underlying data channel ID and data source handle already exist in the array element of the CA middleware, it means that the underlying data channel ID and data source handle have been opened before. Resources, at this point, only need to directly return the subscript variable of the array as the index.

Further, the step S220 specifically includes:

Step S221, when the respective underlying data channel IDs and data source handles of the multiple programs do not exist in the array elements of the CA middleware, set the respective underlying data channel IDs and data source handles of the multiple programs to The handles are stored in unused array elements respectively, and then the subscript variables of said array elements are used as indexes. During specific implementation, for example, when the program opened by the user is a live broadcast, when the underlying data channel ID and data source handle of the live broadcast do not exist in the array elements of the CA middleware, it means that the underlying data channel ID has not been targeted before. , The data source handle has opened up resources; at this time, the CA middleware traverses the structure array 1 to find unused array elements, and saves the data source handle and the underlying data channel ID notified by the application in the unused array elements , and return the subscript variable of the array element as the index.

Step S222, use the index as the subscript variable of the array that saves the data source type sent to the CA middleware by the application, the player handle, and the array that is being used; The subscript variable is used to save the data source type sent by the application to the CA middleware, the player handle, and the flag being used.

Step S223, use the index as a subscript variable of the arrays storing the conditional access table and the program mapping table; during specific implementation, use the index as the subscript variable of the structure array 4 and the structure array 5 to store respectively The PMT table and CAT table sent by the application to the CA middleware.

In step S300, the CA middleware uses the index as the parameter of calling the CA kernel open resource interface, opens the kernel resource, and obtains the program handle of the plurality of programs created by the CA kernel; simultaneously the conditional access table, the program mapping table Send the CA kernel (corresponding to step ③ in Figure 2), and associate the program handles of the multiple programs with the corresponding indexes; the step S300 is mainly to open up CA kernel resources and associate kernel resources through the indexes .

During specific implementation, the CA middleware uses the index as a parameter for calling the CA resource opening interface, opens the kernel resource, obtains the program handle created by the CA kernel, then stores the program handle in the structure array 3 and sets the structure array The subscript variable of 3 is the index, and the CA middleware transmits the PMT table, the CAT table and the program handle corresponding to the table data to the CA kernel.

Further, the step S300 specifically includes:

Step S310, the CA middleware determines whether the conditional access table and program mapping table associated with the index corresponding to the plurality of programs are the same as the conditional access table and program mapping table received last time; during specific implementation, the CA middleware judges whether the Whether the PMT table associated with the index and the CAT table are the same as the PMT table and the CAT table received last time, so as to judge whether there is a resource of the program corresponding to the PMT table associated with the index and the CAT table in the current CA kernel, thereby Decide whether you need to newly open kernel resources.

Step S320, when the conditional access table and program mapping table associated with the index corresponding to the multiple programs are different from the conditional access table and program mapping table received last time, the CA middleware uses the index as the calling CA Kernel opens the parameter of resource interface, opens kernel resource, obtains the program handle of described multiple programs that CA core creates; Simultaneously described conditional access table, program mapping table are sent CA core, and the program handle of described multiple programs is respectively Associate the corresponding index. During specific implementation, when the conditional access table and program mapping table associated with the index are different from the conditional access table and program mapping table received last time, it means that there is no PMT table and PMT table associated with the index in the current CA core. The resource of the program corresponding to the CAT table needs to further open the kernel resource at this time, and create a corresponding program handle; If the tables are the same, it means that the program resource corresponding to the PMT table and the CAT table associated with the index has been enabled in the current CA core, and no processing is needed at this time.

In the step S400, the CA core processes the data of the conditional access table and the program mapping table, and notifies the CA middleware of receiving Entitlement Management Message (EMM) and Entitlement Control Message (Entitlement Control Message) required for descrambling. , ECM) data channel; the CA middleware finds the corresponding underlying data channel ID according to the corresponding indexes of the multiple programs, and opens up the receiving authorization management required for the respective descrambling of the multiple programs on the corresponding underlying data channel The data channel (openchanel) for information and authorization control information, and the descrambling channel for setting the audio and video control word (setCW); during specific implementation, the CA core processes the data of the PMT table and the CAT table, and notifies the CA middleware to open and receive EMM and ECM The data channel (corresponding to steps ④ and ⑤ in Figure 2); the CA middleware will find the index through the corresponding relationship of the structure array 3 according to the program handle or ID provided by the CA core, and then go to the structure array 1 according to the index Find the corresponding underlying data channel, and then open the data channel for receiving ECM and EMM required for descrambling on the corresponding underlying data channel and set the descrambling channel for the audio and video control word CW; more specifically, find the corresponding data allocation through the index The device (dmux) opens up data channels and descrambling channels on the data distributor.

In the step S500, the CA core obtains the authorization management information and the authorization control information from the underlying driver through the data channel for receiving the authorization management information and the authorization control information according to the data in the conditional access table and the program mapping table (corresponding to steps ⑥ and ⑦ in Figure 2), and after descrambling the multiple programs through their respective descrambling channels, notify the CA middleware of the status of the multiple programs (corresponding to Steps ⑧ and ⑨ in Figure 2); the CA middleware notifies the application to make corresponding status processing according to the index (corresponding to step ⑩ in Figure 2). During specific implementation, the CA core receives the EMM and ECM data, and notifies the CA middleware of the program status. The CA middleware finds the index according to the corresponding relationship of the structure array 3, and notifies the CA application, and the application saves the program status to the corresponding Index structure array 2 and call the interface of the upper layer application for status processing, such as A/V (Audio/Video, audio or video) switch control or error code display.

It should be noted that the descrambling process after the descrambling channel is enabled is a prior art, not an inventive point of the present invention, and will not be repeated here.

The method for supporting simultaneous descrambling of multiple programs described in the present invention can realize that the CA middleware supports simultaneous descrambling of multiple programs and simultaneous control and management of multiple program messages, so that the existing CA no longer restricts the expansion of applications, and can Simultaneous processing of multiple programs and simultaneous management of multiple program messages can be applied to various scenarios, such as PIP, FCC, PVR, etc.

The present invention also provides a specific application embodiment of a method for supporting simultaneous descrambling of multiple programs. As shown in FIG. 3 , the method for supporting simultaneous descrambling of multiple programs in the specific application embodiment of the present invention includes:

Step S10, watching a program or starting a certain function by the user;

Step S11, the application notifies the table data of multiple programs including the program and the relevant underlying data channel ID and data source handle to the CA middleware, and then enters step S12;

Step S12, judging whether resources have been opened up for the underlying data channel ID and data source handle corresponding to each program; if not, then enter step S13, and when yes, then enter step S14;

Step S13, the CA middleware opens up internal resource management, obtains the index and records the player handle and data source type, and then enters step S14;

Step S14, the CA middleware saves the PMT table and the CAT table and related content according to the index, and then enters the step S15;

Step S15, judging whether the PMT table and CAT table corresponding to the index are the same as those received last time, when yes, then enter step S16, and when no, then enter step S17;

Step S16, do not process;

Step S17, notify the CA core table data, open the CA core resource, and then enter step S18;

Step S18, correlating the CA kernel resources and the resources developed by the CA middleware through the index, and then entering step S19;

Step S19, find the corresponding data distributor through the index, open up a data channel and a descrambling channel on the data distributor, and notify the application of the state of the relevant channel, and then enter step S20;

Step S20, the application obtains the status corresponding to the player processing for the channel.

The present invention also provides a system that supports simultaneous descrambling of multiple programs, as shown in FIG. ,in,

The data obtaining module 100 is used to obtain the conditional access table and program mapping table corresponding to multiple programs including the program and other programs from the bottom drive at the same time through the bottom data channel when the user starts a program, as well as the corresponding The corresponding relationship between the application, CA middleware, and underlying data channel related to the program is notified to the CA middleware; wherein, the corresponding relationship includes the underlying data channel ID and data source handle; the details are as described above.

The index association module 200 is used for the CA middleware to open up resources and save the received conditional access table, program mapping table and the corresponding relationship, and store the respective underlying data channel IDs and data source handles of the multiple programs in the In the corresponding array element, the subscript variable of the array element is then used as an index, and the conditional access table, the program mapping table and the corresponding relationship corresponding to the plurality of programs are respectively associated with the corresponding index ; specifically as described above.

The core resource opening module 300 is used for the CA middleware to use the index as the parameter of calling the CA core open resource interface, open the core resource, and obtain the program handle of the plurality of programs created by the CA core; simultaneously the conditional access table, The program mapping table sends the CA core, and associates the program handles of the multiple programs with the corresponding indexes; the details are as described above.

The channel opening module 400 is used for the CA core to process the data of the conditional access table and the program mapping table, and notify the CA middleware to open the data channel for receiving authorization management information and authorization control information required for descrambling; Each corresponding index of each program finds the corresponding underlying data channel ID, opens up the data channel for receiving authorized management information and authorized control information required for the respective descrambling of the plurality of programs on the corresponding underlying data channel, and sets the audio and video control Word descrambling channel; specifically as described above.

The descrambling module 500 is used for the CA core to obtain the authorization management information and authorization control information from the underlying driver through the data channel for receiving the authorization management information and authorization control information according to the data in the conditional access table and the program mapping table, After descrambling the multiple programs through the respective descrambling channels of the multiple programs, notify the CA middleware of the states of the multiple programs; the CA middleware notifies the application according to the index to make a corresponding The state handling of the ; as described above.

Further, the corresponding relationship among the applications, CA middleware, and underlying data channels respectively related to the multiple programs includes:

The corresponding relationship between the application and the CA intermediate and underlying data channel, the members are the data source handle, the underlying data channel ID, and the identifier being used;

The corresponding relationship between CA middleware and applications, the members are the identifier in use, player handle, data source type, error code, audio status, and video status.

Further, the index association module 200 specifically includes:

The first judging unit is used for CA middleware to judge respectively whether the underlying data channel IDs and data source handles of the multiple programs have been stored in the CA after receiving the conditional access table, the program mapping table and the corresponding relationship. in the middleware array element; as described above.

An index associating unit, configured to associate the respective underlying data channel IDs of the multiple programs when the respective underlying data channel IDs and data source handles of the multiple programs do not exist in the array elements of the CA middleware , data source handles are respectively stored in unused array elements, and then the subscript variable of the array element is used as an index, and the conditional access table, program mapping table and the corresponding relationship corresponding to the plurality of programs are stored are respectively associated with the corresponding indexes; the details are as described above.

Further, the index association unit specifically includes:

An index generating unit, configured to use the respective underlying data channel IDs of the multiple programs when the respective underlying data channel IDs and data source handles of the multiple programs do not exist in the array elements of the CA middleware , and the data source handle are respectively stored in unused array elements, and then the subscript variable of the array element is used as an index; the details are as described above.

The first associating unit is configured to use the index as a subscript variable of an array that saves the data source type sent to the CA middleware by the application, the player handle, and the array that is being used; specifically as described above.

The second associating unit is configured to use the index as a subscript variable of an array storing the conditional access table and the program mapping table; details are as described above.

Further, the kernel resource opening module 300 specifically includes:

The second judging unit is used for the CA middleware to respectively judge whether the conditional access table and program mapping table associated with the indexes corresponding to the multiple programs are the same as the conditional access table and program mapping table received last time; the details are as described above.

The kernel resource opening unit is used for when the conditional access table and program mapping table associated with the index corresponding to the plurality of programs are different from the conditional access table and program mapping table received last time, the CA middleware will The index is used as the parameter of calling the CA kernel to open the resource interface, and the kernel resource is opened to obtain the program handle of the plurality of programs created by the CA kernel; simultaneously, the conditional access table and the program mapping table are sent to the CA kernel, and the plurality of programs are sent to the CA kernel. The program handles of are respectively associated with the corresponding indexes; the details are as described above.

To sum up, the present invention provides a method and system for supporting simultaneous descrambling of multiple programs. The method for supporting simultaneous descrambling of multiple programs in the present invention can enable CA to better support application expansion, and application expansion The modification of the CA middleware part has little influence at the time, and it can more quickly integrate the functions related to multi-channel data processing, and the compatibility is stronger; One program and multiple program messages can be managed at the same time, which can be applied to various scenarios.

It should be understood that the application of the present invention is not limited to the above examples, and those skilled in the art can make improvements or transformations according to the above descriptions, and all these improvements and transformations should belong to the protection scope of the appended claims of the present invention.

Claims (10)

1. a kind of method for supporting multiple programs while descrambling, which is characterized in that comprising steps of

When user opens a program, being obtained from bottom layer driving simultaneously by bottom data channel includes the program and other sections The corresponding CAT Conditional Access Table of the multiple programs of purpose and Program Map Table and it is relevant to the multiple program difference application, Corresponding relationship between CA middleware, bottom data channel, and notify to give CA middleware；Wherein, the corresponding relationship includes bottom Layer data channel ID, data source handle；

CA middleware opens up the CAT Conditional Access Table, Program Map Table and the corresponding relationship that resource conservation receives, will The respective bottom data channel ID of the multiple program and data original sentence handle are stored in respectively in corresponding array element, then will The subscript variable of the array element is as index, and by the corresponding CAT Conditional Access Table of the multiple program, program map Table and the corresponding relationship are all associated with the corresponding index respectively；

The index as the parameter for calling CA kernel to open resource interface, is opened kernel resources, obtains CA kernel by CA middleware Create the program handle of the multiple program；The CAT Conditional Access Table, Program Map Table are sent into CA kernel simultaneously, and will be described The corresponding index is respectively associated in the program handle of multiple programs；

The data of CAT Conditional Access Table described in CA kernel processes and Program Map Table, notice CA middleware, which unwinds, disturbs required reception and awards Weigh the data channel of management information and Entitlement Control Message；CA middleware is found according to the corresponding index of the multiple program Corresponding bottom data channel ID opens up the multiple program on corresponding bottom data channel and respectively descrambles required reception The descrambling channel of the data channel and setting audio-video control word of Entitlement Management Message and Entitlement Control Message；

CA kernel passes through the reception Entitlement Management Message and authorization according to the data of the CAT Conditional Access Table and Program Map Table The data channel for controlling information obtains Entitlement Management Message and Entitlement Control Message from bottom layer driving, and by the multiple After the respective descrambling channel of program respectively descrambles the multiple program, notice the multiple program of CA middleware State；CA middleware makes corresponding state processing according to index notice application.

2. the method according to claim 1 for supporting multiple programs to descramble simultaneously, which is characterized in that it is described with it is the multiple Relevant application, CA middleware, the corresponding relationship between bottom data channel include: program respectively

Using the corresponding relationship among CA and bottom data channel, member is data source handle, bottom data channel ID, just In the mark used；

The corresponding relationship of CA middleware and application, member are mark currently in use, player handle, data source types, mistake Code, audio status, video state.

3. the method according to claim 2 for supporting multiple programs to descramble simultaneously, which is characterized in that CA middleware opens up money Source saves the CAT Conditional Access Table, Program Map Table and the corresponding relationship received, and the multiple program is respective Bottom data channel ID and data original sentence handle are stored in respectively in corresponding array element, then by the subscript of the array element Variable is as index, and by the corresponding CAT Conditional Access Table of the multiple program, Program Map Table and the corresponding relationship The step of corresponding index is all respectively associated specifically includes step:

After CA middleware receives the CAT Conditional Access Table, Program Map Table and the corresponding relationship, judge respectively described more Whether the respective bottom data channel ID of a program and data original sentence handle have been stored in the array element of CA middleware；

When the respective bottom data channel ID of the multiple program, data source handle be not in the array element of CA middleware In in the presence of, the respective bottom data channel ID of the multiple program, data source handle are stored in respectively not used In array element, then using the subscript variable of the array element as index, and by the corresponding item of the multiple program The corresponding index is all respectively associated in part reception table, Program Map Table and the corresponding relationship.

4. the method according to claim 3 for supporting multiple programs to descramble simultaneously, which is characterized in that when the multiple program It, will be described more in the presence of the respective bottom data channel ID, data source handle be not in the array element of CA middleware The respective bottom data channel ID of a program, data source handle are stored in respectively in not used array element, then will The subscript variable of the array element is as index, and by the corresponding CAT Conditional Access Table of the multiple program, program map The step of corresponding index is all respectively associated in table and the corresponding relationship specifically includes step:

When the respective bottom data channel ID of the multiple program, data source handle be not in the array element of CA middleware In in the presence of, the respective bottom data channel ID of the multiple program, data source handle are stored in respectively not used In array element, then using the subscript variable of the array element as index；

Data source types, player handle and setting that the index is sent to CA middleware as preservation application are made The subscript variable of the array of mark；

Subscript variable by the index as the array for saving the CAT Conditional Access Table, Program Map Table.

5. the method according to claim 1 for supporting multiple programs to descramble simultaneously, which is characterized in that CA middleware will be described It indexes as the parameter for calling CA kernel to open resource interface, opens kernel resources, obtain CA kernel and create the multiple program Program handle；The CAT Conditional Access Table, Program Map Table are sent into CA kernel simultaneously, and by the program handle of the multiple program The step of corresponding index is respectively associated specifically includes step:

CA middleware judge respectively the associated CAT Conditional Access Table of the corresponding index of the multiple program, Program Map Table whether with it is upper The secondary CAT Conditional Access Table received, Program Map Table are identical；

When the condition that the associated CAT Conditional Access Table of the corresponding index of the multiple program, Program Map Table and last time receive When receiving table table, Program Map Table difference, CA middleware as the parameter for calling CA kernel to open resource interface, opens the index Kernel resources are opened, the program handle that CA kernel creates the multiple program is obtained；Simultaneously by the CAT Conditional Access Table, program map Table sends CA kernel, and the corresponding index is respectively associated in the program handle of the multiple program.

6. a kind of system for supporting multiple programs while descrambling characterized by comprising

Data acquisition module, for being obtained from bottom layer driving simultaneously by bottom data channel when user opens a program The corresponding CAT Conditional Access Table of multiple programs and Program Map Table including the program and other programs and with it is the multiple Program distinguishes relevant application, CA middleware, the corresponding relationship between bottom data channel, and notifies to give CA middleware；Wherein, The corresponding relationship includes bottom data channel ID, data source handle；

Index association module, for CA middleware open up the CAT Conditional Access Table, Program Map Table that resource conservation receives with And the corresponding relationship, the respective bottom data channel ID of the multiple program and data original sentence handle are stored in respectively corresponding In array element, then using the subscript variable of the array element as index, and by the corresponding item of the multiple program Part reception table, Program Map Table and the corresponding relationship are all associated with the corresponding index respectively；

Kernel resources opening module opens the index as the parameter for calling CA kernel to open resource interface for CA middleware Kernel resources are opened, the program handle that CA kernel creates the multiple program is obtained；Simultaneously by the CAT Conditional Access Table, program map Table sends CA kernel, and the corresponding index is respectively associated in the program handle of the multiple program；

Module is opened up in channel, for the data of CAT Conditional Access Table described in CA kernel processes and Program Map Table, notifies CA middleware Unwind the data channel for disturbing required reception Entitlement Management Message and Entitlement Control Message；CA middleware is according to the multiple program Corresponding index finds corresponding bottom data channel ID, opens up the multiple program on corresponding bottom data channel The data channel of Entitlement Management Message and Entitlement Control Message is respectively received needed for descrambling and audio-video control word is set Descramble channel；

Descrambling module is authorized for CA kernel according to the data of the CAT Conditional Access Table and Program Map Table by the reception The data channel of management information and Entitlement Control Message obtains Entitlement Management Message and Entitlement Control Message from bottom layer driving, And after descrambling respectively to the multiple program by the respective descrambling channel of the multiple program, CA middleware is notified The state of the multiple program；CA middleware makes corresponding state processing according to index notice application.

7. the system according to claim 6 for supporting multiple programs to descramble simultaneously, which is characterized in that it is described with it is the multiple Relevant application, CA middleware, the corresponding relationship between bottom data channel include: program respectively

Using the corresponding relationship among CA and bottom data channel, member is data source handle, bottom data channel ID, just In the mark used；

The corresponding relationship of CA middleware and application, member are mark currently in use, player handle, data source types, mistake Code, audio status, video state.

8. the system according to claim 7 for supporting multiple programs to descramble simultaneously, which is characterized in that the index is associated with mould Block specifically includes:

First judging unit receives the CAT Conditional Access Table, Program Map Table and the corresponding relationship for CA middleware Afterwards, judge whether the respective bottom data channel ID of the multiple program and data original sentence handle have been stored in CA middleware respectively In array element；

Associative cell is indexed, for not existing when the respective bottom data channel ID of the multiple program, data source handle In the presence of in the array element of CA middleware, by the respective bottom data channel ID of the multiple program, data source handle It is stored in not used array element respectively, then using the subscript variable of the array element as index, and will be described more The corresponding rope is all respectively associated in the corresponding CAT Conditional Access Table of a program, Program Map Table and the corresponding relationship Draw.

9. the system according to claim 8 for supporting multiple programs to descramble simultaneously, which is characterized in that the index association table Member specifically includes:

Generation unit is indexed, for not existing when the respective bottom data channel ID of the multiple program, data source handle In the presence of in the array element of CA middleware, by the respective bottom data channel ID of the multiple program, data source handle It is stored in not used array element respectively, then using the subscript variable of the array element as index；

First associative cell, for the index to be sent to data source types, the player of CA middleware as preservation application The subscript variable of the array of handle and setting mark currently in use；

Second associative cell, for the subscript by the index as the array for saving the CAT Conditional Access Table, Program Map Table Variable.

10. the system according to claim 6 for supporting multiple programs to descramble simultaneously, which is characterized in that the kernel resources Opening module specifically includes:

Second judgment unit, for CA middleware judge respectively the associated CAT Conditional Access Table of the corresponding index of the multiple program, Whether Program Map Table is identical as the CAT Conditional Access Table, Program Map Table that last time receives；

Kernel resources opening unit, for being reflected when the associated CAT Conditional Access Table of the corresponding index of the multiple program, program When CAT Conditional Access Table table that firing table and last time receive, Program Map Table difference, CA middleware is by the index as calling CA Kernel opens the parameter of resource interface, opens kernel resources, obtains the program handle that CA kernel creates the multiple program；Simultaneously will The CAT Conditional Access Table, Program Map Table send CA kernel, and the program handle of the multiple program are respectively associated corresponding The index.