CN201608771U - CMMB conditional access module - Google Patents

Abstract

The utility model discloses a CMMB conditional access module which encapsulates a radio-frequency tuner, a baseband demodulator and a CA intelligent card in a physical package, wherein the radio-frequency tuner receives a service program authorized by CMMB conditional access; and the baseband demodulator and the CA intelligent card finishes the demodulation and decryption processing of the service program together, and then finishes data decryption. An optional audio-video decoder can encode decrypted data. The access module can be connected with a user terminal by an output interface, supports CMMB function, and can play the CMMB program at any place supporting the CMMB program. The CMMB conditional access module improves the flexibility of a terminal system, simplifies the system structure, and reduces the hardware cost of a CMMB access terminal, thus being applicable to various broadcasting systems adopting the conditional access.

Description

The CMMB Conditional Access Module

Technical field

The utility model relates to a kind of condition received communication technology, relates in particular to a kind of CMMB Conditional Access Module.

Background technology

China Mobile multimedia broadcasting TV (CMMB) standard as China research and develop voluntarily, the mobile multimedia standard of independent intellectual property right on top of.Main application fields comprises: the small screen portable hand-held terminals such as mobile phone, mobile television, hand-held navigator, PDA, MP4, notebook computer, and the personal digital assistant device on the automobile, train, steamer, aircraft etc.

CMMB provides outside the part public good class free broadcast TV programme, also provides condition to receive the function of (CA) simultaneously.CMMB operator can pass through condition receiving system (CAS), allows authorized users use value-added service, such as Real-time Traffic Information, stock market or the like.Unwarranted user then can not use this business.The CMMB encryption authorization adopts condition receiving system and electronic purse system dual mode to carry out the authorization control management.Stored value card is based on the smart card security characteristic, supports the application and the data structure of transaction such as supplementing with money, consume and query the balance.

Which kind of mode no matter business to service condition receives adopt, and the CMMB broadcast system all uses scrambler that its content is carried out scrambling, and by the Entitlement Control Message (ECM) of condition receiving system scrambling control word (CW) is carried out encrypted transmission.

A basic CMMB receiving terminal comprises such several sections: radio-frequency tuner, base band demodulator, condition receive the display screen and the loud speaker of security module, multimedia processor and final output signal.The radio-frequency tuner of wireless receiving and base band demodulator have constituted the reception and the demodulation of CMMB signal together.The signal that demodulation is finished has comprised the broadcast program of no scrambling and the value-added service program of scrambling.In case the user has selected reception value-added service program, condition receives security module will extract data such as scrambling parameter, rate information from the scrambled data of base band demodulator output, by decryption processing, obtain final audio/video flow information then.Multimedia processor decoding audio/video flow information, and come out at display screen and loudspeaker plays.

For portable hand-held terminals such as mobile phone, mobile television, hand-held navigator, PDA, MP4, notebook computers, they have often all possessed strong multimedia processor and complete user interface (display screen, loud speaker and button).In these portable hand-held terminals, receive security module as long as add antenna, radio-frequency tuner, base band demodulator and the condition of CMMB, can upgrade becomes the CMMB receiving terminal.

In the prior art, condition receives the multiple mode that is provided with of security module, as:

Adopt the technical scheme of MicroSD lesser calorie, as shown in Figure 1:

A MicroSD smart card (lesser calorie) has CA intelligent card function and Flash memory function simultaneously.Such lesser calorie can insert the TF draw-in groove of user terminal.The processor of user terminal needs integrated CA smart card API, finishes descrambling and decryption work with the smart card of lesser calorie inside.

Adopt the technical scheme of MicroSD kilocalorie, as shown in Figure 2:

A MicroSD kilocalorie has the CA intelligent card function simultaneously, code stream descrambling and Flash memory function.Such lesser calorie can insert the TF draw-in groove of user terminal.The processor of user terminal only need be according to kilocalorie interface specification input scrambled data.Smart card and processor by kilocalorie inside are finished descrambling and decryption work together.The data that last kilocalorie output descrambling finishes.

Adopt the technical scheme of built-in CA smart card, as shown in Figure 3:

The CA smart card can be directly with the form of paster a part as user terminal.Smart card and user terminal processes device pass through interface communication.Finish descrambling and decryption work together.The data that last kilocalorie output descrambling finishes.

There is following shortcoming at least in above-mentioned prior art:

Three kinds of schemes that CMMB condition of the prior art receives all are at the built-in user terminal of CMMB reception antenna, radio-frequency tuner and base band demodulator.But the overwhelming majority's user terminal on the market does not possess such CMMB and receives hardware.The mobile phone market of enormous amount on the market particularly.The authentication because mobile phone need network, CMMB receives hardware to be difficult to be integrated in the huge GSM mobile handset of user.The solution that present CMMB condition receives can't solve the problem that GSM mobile handset networks and detects.

In addition, the solution of present CMMB condition reception also has shortcomings such as cost height, integrated level is low, configuration is dumb.

The utility model content

The purpose of this utility model provides the CMMB Conditional Access Module that a kind of application is convenient, integrated level is high.

The purpose of this utility model is achieved through the following technical solutions:

CMMB Conditional Access Module of the present utility model comprises being packaged into radio-frequency tuner, base band demodulator and a CA smart card in the physics packing that described physical package is equiped with output interface;

Described radio-frequency tuner receives by the CMMB condition and receives the service program of authorizing;

Described base band demodulator is finished the decryption processing of described service program with the CA smart card, and the data of being finished by base band demodulator output deciphering.

The technical scheme that provides by above-mentioned the utility model as can be seen, CMMB Conditional Access Module described in the utility model is because radio-frequency tuner, base band demodulator and CA smart card are packaged in the physics packing; Radio-frequency tuner receives by the CMMB condition and receives the service program of authorizing; Base band demodulator is finished the decryption processing of serving program with the CA smart card, and deciphers the data of finishing by base band demodulator output.Application is convenient, integrated level is high.

Description of drawings

Fig. 1 is the structure principle chart that the condition of prior art one receives security module;

Fig. 2 is the structure principle chart that the condition of prior art two receives security module;

Fig. 3 is the structure principle chart that the condition of prior art three receives security module;

Fig. 4 is the structure principle chart of the utility model CMMB Conditional Access Module;

Fig. 5 is the application state schematic diagram of the utility model CMMB Conditional Access Module.

Embodiment

CMMB Conditional Access Module of the present utility model, its preferable embodiment comprise being packaged into radio-frequency tuner, base band demodulator and a CA smart card in the physics packing that physical package is equiped with output interface as shown in Figure 4; Radio-frequency tuner receives by the CMMB condition and receives the service program of authorizing; Base band demodulator is finished the decryption processing of serving program with the CA smart card, and deciphers the data of finishing by base band demodulator output.

Can also comprise multimedia processor, multimedia processor is done audio/video decoding.Multimedia processor can be integrated on the chip piece with base band demodulator.The CA smart card also can be integrated on the chip piece with base band demodulator.Specifically can adopt the integrated form of single-chip, or the radio-frequency tuner of SiP form and base band demodulator, can also adopt other integrated form respectively.

Can be provided with reception antenna in the physics packing; Also can be provided with antennal interface and be used for external antenna in the physics outer package, can be by the own external antenna of user; Also can be provided with the exterior antenna contact at the output interface place, be used for being connected with the antenna of user terminal, when the CMMB module is inserted on the user terminal, the metallic contact of reserving in the encapsulation just in time is connected to reception antenna.

Above-mentioned physics packing can be Micro SD card, SD card, MiniSD card, CompactFlash card, MultiMedia card, SmartMedia card, pcmcia card or USB Dongle etc., also can adopt forms such as other User Defined encapsulation.

Above-mentioned output interface can for SDIO interface, SPI interface or USB interface etc. one or more, can also adopt in the interfaces such as SSP synchronous serial interface, IEEE 1284 parallel interfaces, LPC interface, 8-bit/16-bit STD bus interface, PCI/PCI-E bus interface, HPI host interface bus one or more;

When containing the audio-visual data processor in the CMMB Conditional Access Module, output interface can also be in composite video interface, component vide interface, S-Video interface, HDMI, VGA, DVI, Display Port, the output of multichannel analogue audio frequency, I2S digital audio interface, the S/PDIF digital audio interface one or more.

As shown in Figure 5, this CMMB Conditional Access Module can be plugged on the user terminal by output interface.User terminal can comprise one or multinomial of mobile phone, mobile television, hand-held navigator, PDA, MP4, notebook computer, board information terminal etc.

Specific embodiment:

Referring to Fig. 4, Fig. 5, be that example is introduced the CMMB condition reception programme that the utility model provides with the mobile phone.

In CA scheme of the present utility model, receive relevant functional module with the CMMB condition, comprise reception antenna, radio-frequency tuner, base band demodulator and CA smart card, all intactly be packaged in the physics packing, physical package can be Micro SD card, SD card, MiniSD card, CompactFlash card, MultiMedia card, SmartMedia card, pcmcia card or USB Dongle etc.Physical package installs to and adopts the hardware interface of popularizing very much in the user terminal, comprises SDIO, SPI, USB or the like.

Wherein in the CMMB Conditional Access Module, antenna, radio-frequency tuner and base band demodulator have constituted the reception and the demodulation of CMMB signal together.The value-added service program that demodulation finishes is handled by scrambling.Utilize the disposal ability of base band demodulator, realized complete CA smart card API.Like this, base band demodulator has been realized meeting the desired condition of CMMB standard with the CA smart card and has been received security mechanism.

In the utility model, every service program of authorizing by the reception of CMMB condition, base band demodulator is finished decryption processing with the CA smart card.Base band demodulator will unify to export the data that deciphering is finished.The interface of output adopts the hardware interface of popularizing very much, can be SDIO, SPI, USB or the like.

The utility model uses in user terminal, has accomplished the complete independence of CMMB condition receiving system and user terminal platform.After having adopted " separation between machine and card " of the present utility model scheme, the form output that all CMMB programs have all been deciphered.For the user terminal platform, this is an external data flow.User terminal, for example mobile phone need not to add any unnecessary hardware for the CMMB function.In case need to support the CMMB function, only need to insert CMMB Conditional Access Module of the present utility model (the CMMB condition receives receiving card), the playout software that CMMB is installed on user terminal simultaneously gets final product.This production for various user terminals such as mobile phones, networking detection, sale, service support etc. all have very big benefit.

In the utility model, because " separation between machine and card " of CMMB and user terminal, the user can buy a CMMB card, and plays in the place of any support CMMB program.Improved the flexibility of using; Complete CMMB condition receives receiving system, has simplified system configuration, has reduced the hardware cost of CMMB receiving terminal; The Flash storage is separated with CMMB card function.Improve user's flexibility, reduced cost.

The utility model receives receiving system as a complete CMMB condition, has simplified system configuration, has reduced the hardware cost of CMMB receiving terminal; The Flash storage is separated with CMMB card function.Improve user's flexibility, reduced cost.

The above; it only is the preferable embodiment of the utility model; but protection range of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement all should be encompassed within the protection range of the present utility model.

Claims (6)

1. a CMMB Conditional Access Module is characterized in that, comprises being packaged into radio-frequency tuner, base band demodulator and a CA smart card in the physics packing, and described physical package is equiped with output interface; Also comprise multimedia processor, described multimedia processor and described base band demodulator are integrated on the chip piece;

Described CA smart card and described base band demodulator are integrated on the chip piece.

2. CMMB Conditional Access Module according to claim 1 is characterized in that, is provided with reception antenna in the described physics packing.

3. CMMB Conditional Access Module according to claim 1 is characterized in that described output interface comprises the exterior antenna contact.

4. CMMB Conditional Access Module according to claim 1 is characterized in that described physical package is equiped with the exterior antenna interface.

5. CMMB Conditional Access Module according to claim 1, it is characterized in that described physics is packaged as MicroSD card, SD card, MiniSD card, CompactFlash card, MultiMedia card, SmartMedia card, pcmcia card, USB Dongle or SiP encapsulation.

6. CMMB Conditional Access Module according to claim 1, it is characterized in that described output interface is one or more in SDIO interface, SPI interface, USB interface, SSP synchronous serial interface, IEEE 1284 parallel interfaces, LPC interface, 8-bit/16-bit STD bus interface, PCI/PCI-E bus interface, the HPI host bus interface;

When containing the audio-visual data processor in the CMMB Conditional Access Module, output interface can also be in composite video interface, component vide interface, S-Video interface, HDMI, VGA, DVI, Display Port, the output of multichannel analogue audio frequency, I2S digital audio interface, the S/PDIF digital audio interface one or more.

Images