CN2643553Y

CN2643553Y - Receiving apparatus for satellite data broadcasting

Info

Publication number: CN2643553Y
Application number: CN 03243287
Authority: CN
Inventors: 余志勇; 柯发敏
Original assignee: Beijing Tsinghua Novel Electronics Co ltd
Current assignee: Beijing Tsinghua Novel Electronics Co ltd
Priority date: 2003-04-15
Filing date: 2003-04-15
Publication date: 2004-09-22
Anticipated expiration: 2013-04-15

Abstract

The utility model relates to a satellite digit broadcast receiving device, including a DVB-Shigh frequency tuner module, a signal processing module, a power module, an indicating lamp module, a PID acquisition module and a PCI interface module. The utility model receives the RF signal from the satellite, after the demodulation, decryption and format conversation, the signal is converted into the digital signal which can be processed by a computer, and the digital signal is input into the computer. Through the PCI interface module, the utility model can exchange the data with the computer by inserting a car via a computer PCI interface.

Description

The satellite data broadcasting receiving system

Technical field

The utility model relates to a kind of satellite data broadcasting receiving system, relates in particular to a kind of satellite data broadcasting (DVB-S) receiving system that is applicable to very small aperture terminal (VSAT) system.

Technical background

In the past, satellite is only as the means of communication of transporting speech and TV signal, so corresponding receiver devices is satellite antenna+receiver, transmission be analog signal.But now along with the extensive use of arriving, the especially INTERNET of informationized society, digital signal is little with its occupied bandwidth, good confidentiality, and images, speech are clear, are subjected to everybody favor.In this case, satellite data video broadcasting (DVB-S) is arisen at the historic moment, and its front end main website through ovennodulation, is transmitted into the very small aperture terminal (VSAT) of far-end to digital signals such as IP packets via satellite.Because traditional satellite receiver can only receive analog signal,, therefore need a kind of receiving terminal that can adapt to this new business so it no longer is suitable as the receiving terminal of this new business.

The PC of popularizing rapidly is a PC, because of its superpower data-handling capacity becomes the professional receiving terminal of desirable high-speed datacasting.But PC can not directly receive and handle qpsk modulation signal, the signal that therefore needs a kind of new computer installation to become the conversion of signals that receives from satellite PC to receive and to handle.

Summary of the invention

The main purpose of the utility model provides a kind of satellite data broadcasting receiving system, this device receives the radiofrequency signal from satellite antenna, and this signal is carried out obtaining the manageable digital signal of computer and this signal being sent into computer after the processing such as demodulation is close.

Another purpose of the present utility model provides a kind of satellite data broadcasting receiving system, and the pci interface of this device by computer carries out exchanges data with the form and the computer of plug-in card.

For realizing purpose of the present invention,, comprising according to a kind of satellite data broadcasting receiving system of the present invention:

DVB-S tuner module is used to receive the radiofrequency signal from satellite antenna, generates and export the data of DVB standard after this radiofrequency signal is carried out quadrature demodulation and digital demodulation;

Signal processing module, be used to receive data from the DVB standard of DVB-S tuner module, decruption key according to the bag identification code (PID) that is about to filtering data that obtains and these data of filtration wraps identification code (PID) filtration, deciphering to the data of this DVB standard then, at last the data transaction after the deciphering is become the data and the output of MII form, perhaps receive Entitlement Control Message (ECMs) and Entitlement Management Message (EMMs) and be transmitted to other module;

Key and bag identification code (PID) acquisition module, be used to receive Entitlement Control Message (ECMs) and Entitlement Management Message (EMMs) from signal processing module, according to being kept at the authentication number in the module and handling with the bag identification code (PID) that obtains filtering data soon to described information and decipher the decruption key that these data are used, and PID and the decruption key that processing obtains sent to signal processing module with encrypting relevant program;

The pci interface module, be used to receive data from the MII form of signal processing module, and these data are sent to computer via the computer PCI interface, perhaps receive Entitlement Control Message (ECMs) from computer and Entitlement Management Message (EMMs) and these information are transmitted to signal processing module.

The accompanying drawing summary

Fig. 1 is a satellite data broadcasting receiving system module diagram;

Fig. 2 is the detailed circuit diagram of the preferred embodiment of satellite data broadcasting receiving system of the present utility model.

Detailed Description Of The Invention

Below in conjunction with accompanying drawing, satellite data broadcasting receiving system of the present utility model is elaborated.

Fig. 1 is a satellite data broadcasting receiving system module diagram of the present utility model.As shown in Figure 1, this device comprises: DVB-S tuner module 10, signal processing module 20, power module 30, indicating lamp module 40, key and bag identification code (PID) acquisition module 60 and pci interface module 50.

DVB-S tuner module 10 comprises:

Quadrature demodulation unit 1 is used for receiving the radiofrequency signal from satellite antenna low noise low-converter (LNB), and to this radiofrequency signal amplify, back demodulation output I, Q two-way base-band analog signal are handled in filtering etc.

DVB-S demodulating unit 2 is used to receive the analog baseband signal of quadrature demodulation unit 1 output and this signal is carried out digital demodulation, recovers output DVB standard transmission stream.

Signal processing module 20 comprises:

Bag identification code (PID) filter element 3 is used to receive the DVB standard transmission stream that DVB-S demodulating unit 2 is exported, and according to instructing the data of filtering output appointment bag identification code (PID), it can filter simultaneously at most and export 32 road bag identification code (PID) data.

DVB descrambling unit 4 is used for the data that reception bag identification code (PID) filter element 3 filters output, according to decruption key that provides and the common descrambler algorithm that is built in the DVB standard in the unit, the data that receive is decrypted output then.

MII interface unit 5 is used to receive the decrypted signal that DVB descrambling unit 4 is exported, and then this conversion of signals is become to meet the signal and the output of MII data format.

Control unit 6, be used to receive the bag identification code (PID) that is about to filtering data and decipher the decruption key that these data are used, and the bag identification code (PID) that receives sent to bag identification code (PID) filter element 3, the decruption key that receives is sent to DVB descrambling unit 4; Perhaps receive Entitlement Control Message (ECMs) and Entitlement Management Message (EMMs), and these information are transmitted to correlation module or unit from computer.

Intelligent card interface unit 7, be used for when the Conditional Access data receiving from the Entitlement Control Message (ECMs) of control unit 6 and Entitlement Management Message (EMMs) and these information and be transmitted to smart card, simultaneously smart card according to the bag identification code (PID) of the filtering data soon of Entitlement Control Message (ECMs) and Entitlement Management Message (EMMs) generation and the decruption key that is used to decipher these data send to control unit 6.This interface unit meets the IS07816 standard, can support the smart card of T=0 mode.

Intelligent card socket 8, be used for when the Conditional Access data, inserting smart card, the smart card that make to insert can receive Entitlement Control Message (ECMs) and the Entitlement Management Message (EMMs) from intelligent card interface unit 7, and smart card according to the bag identification code (PID) of the filtering data soon of Entitlement Control Message (ECMs) and Entitlement Management Message (EMMs) generation and the decruption key that is used to decipher these data send to intelligent card interface unit 7.

The power supply that provides according to computer is provided power module 30, uses to boost and the voltage stabilizing circuit conversion produces the power supply of multiple varying level for 10 uses such as grade of DVB-S tuner module.

Indicating lamp module 40, residing state when being used to use indicator light shows signal processing module 20 processing signals.This indicating lamp module has one green one yellow two lamps, and the normal bright expression signal processing module 20 of green light has locked the pid data of given filter; Green light flicker expression signal processing module 20 is receiving data; The normal bright expression smart card of amber light correctly inserts intelligent card socket 8, can receive data from satellite antenna.

Key and bag identification code (PID) acquisition module 60, be used to receive Entitlement Control Message (ECMs) and Entitlement Management Message (EMMs) from control unit 6, according to being kept at the authentication number in the module and handling with the bag identification code (PID) that obtains filtering data soon to described information and decipher the decruption key that these data are used, and the bag identification code (PID) and the decruption key that obtain are sent to control unit 6 with encrypting relevant program.

Pci interface module 50, be used for received signal processing module 20 output the MII data format signal and send to computer via the computer PCI interface, the perhaps Entitlement Control Message (ECMs) that sends via the computer PCI interface of receiving computer and Entitlement Management Message (EMMs) and these information are transmitted to control unit 6.

As shown in Figure 2, F7HZ1180 is the DVB-S integral high frequency head, realize the function of quadrature demodulation unit 1 and DVB-S demodulating unit 2 in Fig. 1 DVB-S tuner module 10, so F7HZ1180 can receive from the radiofrequency signal of satellite antenna and to this signal and carries out quadrature demodulation and DVB-S demodulation process.

XC2S50 is field programmable gate array (FPGA), realize the function of PID filter element 3, DVB descrambling unit 4, MII interface unit 5, control unit 6 and intelligent card interface unit 7 in Fig. 1 signal processing module 20, be used to receive the signal of F7HZ1180 output, the key according to the bag identification code (PID) that is about to filtering data that obtains and these data uses of deciphering wraps processing such as identification code (PID) filtration, deciphering and MII format conversion to this signal then.It is one of core component of the present utility model.

W89C840AF realizes the function that pci interface module 50 is required, be used to receive the signal of XC2S50 output and this signal is sent to computer via the computer PCI interface, perhaps the Entitlement Control Message (ECMs) and the Entitlement Management Message (EMMs) that send of receiving computer and be transmitted to XC2S50.

P87LPC764 realizes the function that Fig. 1 key and bag identification code (PID) acquisition module 60 are required, be used for Entitlement Control Message (ECMs) and Entitlement Management Message (EMMs) that receiving computer is transmitted via XC2S50, according to the authentication number of preserving and with encrypting relevant program described information is handled to obtain the decruption key that XC2S50 is about to the bag identification code (PID) of filtering data and deciphers these data uses then, at last the bag identification code (PID) and the decruption key that obtain are sent to XC2S50.

SIM_CONN realizes the function that Fig. 1 intelligent card socket 8 is required, be used for when the Conditional Access data, inserting smart card, make the smart card that inserts from XC2S50, to obtain Entitlement Control Message (ECMs) and Entitlement Management Message (EMMs), then these information are handled and obtained the decruption key that XC2S50 is about to the bag identification code (PID) of filtering data and deciphers these data uses, at last the bag identification code (PID) and the decruption key that obtain are sent to XC2S50.

MC34063A, CD4069,78D05, LM1117_3.3 and LM1117_2.5 realize the function that Fig. 1 power module 30 is required together, are used to produce voltage 14/18V, 30V, 3.3V, and 2.5V and 5V use for F7HZ1180.Wherein, 14/18V obtains after using MC34063A to boost, and gives the satellite antenna low noise amplifier via F7HZ1180 and use; 30V uses the CD4069 acquisition of boosting; 3.3V the 5V power supply that provides according to computer uses the LM1117_3.3 voltage stabilizing to obtain; 2.5V the 5V power supply that provides according to computer uses the LM1117_2.5 voltage stabilizing to obtain; The 12V power supply that 5V provides according to computer uses the 78D05 voltage stabilizing to obtain.

D7 realizes the function of Fig. 1 indicating lamp module 40, residing state when being used to use indicator light to show the XC2S50 processing signals.D7 has one green one yellow two lamps, and the normal bright expression XC2S50 of green light has locked the data of given filter bag identification code (PID); Green light flicker expression XC2S50 is receiving data; The normal bright expression smart card of amber light correctly inserts intelligent card socket 8, and XC2S50 can receive data from satellite antenna.

Beneficial effect

In sum, the utility model by DVB-S high frequency head module, signal processing module, Power module, indicating lamp module, key and bag identification code (PID) acquisition module and PCI connect The mouth module receives the radiofrequency signal from satellite antenna, and this signal is being carried out demodulation, deciphering With obtain the manageable data signal of computer after the processing such as format conversion and this signal given Enter computer. Simultaneously by the pci interface module so that this device can be by the PCI of computer Interface carries out exchanges data with form and the computer of plug-in card.

Claims

1, a kind of satellite data broadcasting receiving system is characterized in that, comprising:

DVB-S tuner module is used for the radiofrequency signal from the satellite antenna is converted to the data and the output of DVB standard;

Key and bag identification code (PID) acquisition module are used to obtain required decruption key and bag identification code (PID) and the output of data of handling described DVB standard;

Signal processing module, link to each other with described DVB-S tuner module and key and bag identification code (PID) acquisition module, be used for decruption key and bag identification code (PID) according to the output of described key and bag identification code (PID) acquisition module, the data that the data of the DVB standard of described DVB-S tuner module output are converted to the MII form are also exported;

The pci interface module links to each other with described signal processing module, is used for the data of the MII form of described signal processing module output are sent to computer.

2, satellite data broadcasting receiving system as claimed in claim 1 is characterized in that, described signal processing module further comprises:

Control unit links to each other with described key and bag identification code (PID) acquisition module, is used to receive the decruption key and the bag identification code (PID) of described key and the output of bag identification code (PID) acquisition module, and they are sent to corresponding processing unit;

Bag identification code (PID) filter element, link to each other with DVB-S tuner module with described control unit, be used for according to from the bag identification code (PID) of described control unit, the data of the DVB standard of described DVB-S tuner module output are carried out corresponding filtration treatment and output;

DVB descrambling unit links to each other with described control unit and bag identification code (PID) filter element, is used for according to the decruption key from described control unit, and the data of described bag identification code (PID) filter element output are carried out corresponding decryption processing and output;

The MII interface unit links to each other with the pci interface module with described DVB descrambling unit, is used for the data transaction of described DVB descrambling unit output is become the data of MII form and exports to described pci interface module.

3, satellite data broadcasting receiving system as claimed in claim 2 is characterized in that, described signal processing module also comprises:

The intelligent card interface unit links to each other with described control unit, is used for when the Conditional Access data, receives described decruption key and bag identification code (PID) from smart card, and they are sent to described control unit.

As claim 1,2 or 3 described satellite data broadcasting receiving systems, it is characterized in that 4, described DVB-S tuner module further comprises:

The quadrature demodulation unit is used for the radiofrequency signal from the satellite antenna is demodulated into base-band analog signal and output;

The DVB-S demodulating unit links to each other with signal processing module with described quadrature demodulation unit, is used for the base-band analog signal of described quadrature demodulation unit output is demodulated into the data of DVB standard, and these data are exported to described signal processing module.

5, as the described satellite data broadcasting receiving system of any one claim in the claim 1 to 3, it is characterized in that, also comprise:

Power module links to each other with described DVB-S tuner module, is used to generate the power supply of multiple different voltages and exports to described DVB-S tuner module.

6, as the described satellite data broadcasting receiving system of any one claim in the claim 1 to 3, it is characterized in that, also comprise:

Indicating lamp module links to each other with described signal processing module, is used to show the treatment state of described signal processing module.

7, as the described satellite data broadcasting receiving system of any one claim in the claim 1 to 3, it is characterized in that, also comprise:

Intelligent card socket links to each other with described intelligent card interface unit, is used to insert smart card.