CN201188659Y - Multi-standard digital television signal frontend processing device and digital television play system - Google Patents
Multi-standard digital television signal frontend processing device and digital television play system Download PDFInfo
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- CN201188659Y CN201188659Y CNU2008200603032U CN200820060303U CN201188659Y CN 201188659 Y CN201188659 Y CN 201188659Y CN U2008200603032 U CNU2008200603032 U CN U2008200603032U CN 200820060303 U CN200820060303 U CN 200820060303U CN 201188659 Y CN201188659 Y CN 201188659Y
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Abstract
The utility model discloses a front-end processing unit of a multisystem digital television signal and a full digital television play system, which solve the problem that the digital television can not be compatible with the original satellite television system after being upgraded and has the technical proposal as follows: a plurality of front-end decrypting modules with different systems and a plurality of QAM modulators are included, wherein, the front-end decrypting modules with different systems perform demodulation and descramble to received digital signals with different systems and output TS stream after descramble; each QAM modulator is respectively connected to each front-end decrypting module, and then demodulates the input TS stream by a QAM way and outputs a RF signal. The front-end processing unit of a multisystem digital television signal and a full digital television play system are applied to the field of a digital television.
Description
Technical field
The digital television broadcasting system that the utility model relates to a kind of digital television signal front end processing device and comprises this front end processing device relates in particular to a kind of digital television broadcasting system that has the front end processing device of multisystem digital television signal and comprise this front end processing device.
Background technology
The at present popular set-top box of passing through watches that the mode of Digital Television has in fact only solved the problem of how watching Digital Television by traditional simulated television, as shown in Figure 1, but owing to be analog signal, be not real Digital Television so the user watches by the signal of exporting after the set-top box processes.
Fig. 2 shows the structure of simulated television Play System traditional in the hotel.See also Fig. 2, the hotel is that every television set 13 is equipped with a satellite set top box 10 separately.Satellite set top box 10 receives the DVB-S satellite TV signals, converts to after the analog signal by the modulation of modulator 11 and the mixing of blender 12, forms cable TV signal, is transferred in the corresponding TV 13.And the CATV anolog TV signals directly are transferred in the corresponding TV 13 by blender 12.
The problem that above-mentioned simulated television Play System faces has: (1) has high input, and every television set all needs to be equipped with separately a set-top box; (2) can't be compatible mutually with the original satellite TV system in hotel, because set-top box intelligence receiving digital signals, so the anolog TV signals that original satellite TV system sent can't be watched; (3) inconvenient operation, because set-top box and television set all have remote controller separately to control respectively, the user uses very inconvenient; (4) because the signal after set-top box conversion is an analog signal, the requirement of the Digital Television that image quality is difficult to reach real; (5) take the hotel guest room space behind the fitting machine top box, influence aesthetics.
Summary of the invention
The purpose of this utility model is to address the above problem, a kind of multisystem digital television signal front end processing device is provided, accomplished really that the overall process that is transferred to decoding is digital signal, well solved after the upgrading Digital Television can't compatible original satellite TV system problem.
Another purpose of the present utility model is to provide a kind of digital television broadcasting system of total digitalization, in be provided with multisystem digital television signal front end processing device, accomplished really that the overall process that is transferred to decoding is digital signal, well solved after the upgrading Digital Television can't compatible original satellite TV system problem.
The technical solution of the utility model is: the utility model has disclosed a kind of multisystem digital television signal front end processing device, comprising:
The front end deciphering module of a plurality of different systems carries out demodulation to the digital signal of the different systems that receives and disturbs, the TS stream behind the output descrambling;
A plurality of QAM modulators are connected after each described front end deciphering module separately, the TS stream of input are modulated output RF signal by the QAM mode.
Above-mentioned multisystem digital television signal front end processing device, wherein, the front end deciphering module of described different systems further comprises:
DVB-S front end deciphering module receives the DVB-S signal, carries out the QPSK demodulation, and finishes descrambling work according to corresponding C A information, the TS stream behind the output descrambling.
Above-mentioned multisystem digital television signal front end processing device, wherein, this DVB-S front end deciphering module further comprises:
The numeral tuner receives the RF signal, the output intermediate-freuqncy signal;
The DVB-S demodulation module carries out the QPSK demodulation with the RF signal that receives, the TS stream that output is encrypted;
The DVB-CI descrambling module based on the separation between machine and card descrambling of pcmcia interface, is finished descrambling according to the corresponding condition receiving card of CA replacing that encryption TS stream is adopted, output TS free flow;
Microcontroller is used for coordination and control to each module;
The I2C controller is directly controlled this numeral tuner and this DVB-S demodulation module.
Above-mentioned multisystem digital television signal front end processing device, wherein, the front end deciphering module of described different systems further comprises:
DVB-C front end deciphering module receives the DVB-C signal, carries out the QAM demodulation, and finishes descrambling work according to corresponding C A information, the TS stream behind the output descrambling.
Above-mentioned multisystem digital television signal front end processing device, wherein, this DVB-C front end deciphering module further comprises:
The numeral tuner receives the RF signal, the output intermediate-freuqncy signal;
The DVB-C demodulation module carries out the QAM demodulation with the RF signal that receives, the TS stream that output is encrypted;
The DVB-CI descrambling module based on the separation between machine and card descrambling of pcmcia interface, is finished descrambling according to the corresponding condition receiving card of CA replacing that encryption TS stream is adopted, output TS free flow;
Microcontroller is used for coordination and control to each module;
The I2C controller is directly controlled this numeral tuner and this DVB-C demodulation module.
Above-mentioned multisystem digital television signal front end processing device, wherein, the front end deciphering module of described different systems further comprises:
DMB-TH front end deciphering module receives the DMB-TH signal, carries out the DMB-TH demodulation, and finishes descrambling work according to corresponding C A information, the TS stream behind the output descrambling.
Above-mentioned multisystem digital television signal front end processing device, wherein, this DMB-TH front end deciphering module further comprises:
The numeral tuner receives the RF signal, the output intermediate-freuqncy signal;
The DMB-TH demodulation module carries out the DMB-TH demodulation with the RF signal that receives, the TS stream that output is encrypted;
The DVB-CI descrambling module based on the separation between machine and card descrambling of pcmcia interface, is finished descrambling according to the corresponding condition receiving card of CA replacing that encryption TS stream is adopted, output TS free flow;
Microcontroller is used for coordination and control to each module;
The I2C controller is directly controlled this numeral tuner and this DMB-TH demodulation module.
The utility model has also disclosed a kind of digital television broadcasting system of total digitalization, comprising:
Multisystem digital television signal front end processing device comprises:
The front end deciphering module of a plurality of different systems carries out demodulation to the digital signal of the different systems that receives and disturbs, the TS stream behind the output descrambling;
A plurality of QAM modulators are connected after each described front end deciphering module separately, the TS stream of input are modulated output RF signal by the QAM mode;
Blender mixes the RF signal that this multisystem digital television signal front end processing device is exported;
Be positioned at a plurality of digital TV integrated machines of terminal, the output signal that receives this blender is play.
The digital television broadcasting system of above-mentioned total digitalization, wherein, the front end deciphering module of described different systems further comprises:
DVB-S front end deciphering module receives the DVB-S signal, carries out the QPSK demodulation, and finishes descrambling work according to corresponding C A information, the TS stream behind the output descrambling.
The digital television broadcasting system of above-mentioned total digitalization, wherein, this DVB-S front end deciphering module further comprises:
The numeral tuner receives the RF signal, the output intermediate-freuqncy signal;
The DVB-S demodulation module carries out the QPSK demodulation with the RF signal that receives, the TS stream that output is encrypted;
The DVB-CI descrambling module based on the separation between machine and card descrambling of pcmcia interface, is finished descrambling according to the corresponding condition receiving card of CA replacing that encryption TS stream is adopted, output TS free flow;
Microcontroller is used for coordination and control to each module;
The I2C controller is directly controlled this numeral tuner and this DVB-S demodulation module.
The digital television broadcasting system of above-mentioned total digitalization, wherein, the front end deciphering module of described different systems further comprises:
DVB-C front end deciphering module receives the DVB-C signal, carries out the QAM demodulation, and finishes descrambling work according to corresponding C A information, the TS stream behind the output descrambling.
The digital television broadcasting system of above-mentioned total digitalization, wherein, this DVB-C front end deciphering module further comprises:
The numeral tuner receives the RF signal, the output intermediate-freuqncy signal;
The DVB-C demodulation module carries out the QAM demodulation with the RF signal that receives, the TS stream that output is encrypted;
The DVB-CI descrambling module based on the separation between machine and card descrambling of pcmcia interface, is finished descrambling according to the corresponding condition receiving card of CA replacing that encryption TS stream is adopted, output TS free flow;
Microcontroller is used for coordination and control to each module;
The I2C controller is directly controlled this numeral tuner and this DVB-C demodulation module.
The digital television broadcasting system of above-mentioned total digitalization, wherein, the front end deciphering module of described different systems further comprises:
DMB-TH front end deciphering module receives the DMB-TH signal, carries out the DMB-TH demodulation, and finishes descrambling work according to corresponding C A information, the TS stream behind the output descrambling.
The digital television broadcasting system of above-mentioned total digitalization, wherein, this DMB-TH front end deciphering module further comprises:
The numeral tuner receives the RF signal, the output intermediate-freuqncy signal;
The DMB-TH demodulation module carries out the DMB-TH demodulation with the RF signal that receives, the TS stream that output is encrypted;
The DVB-CI descrambling module based on the separation between machine and card descrambling of pcmcia interface, is finished descrambling according to the corresponding condition receiving card of CA replacing that encryption TS stream is adopted, output TS free flow;
Microcontroller is used for coordination and control to each module;
The I2C controller is directly controlled this numeral tuner and this DMB-TH demodulation module.
The utility model contrast prior art has following beneficial effect: multisystem digital television signal front end processing device of the present utility model and comprising in the digital television broadcasting system of this front end processing device, at a plurality of front end deciphering modules of hotel's machine room (front end) setting at a plurality of digital television mode, compared to prior art, have some following advantages: (1) cost is low, be equipped with a set-top box with respect to every television set, cost can significantly reduce; (2) flexible configuration can dispose the quantity and the model of deciphering module flexibly according to user's request, thereby adapt to the demand in different hotels; (3) easy to operate, only need a remote controller control television set, meet popular use habit; (4) realized real digital television system, be digital signal from the overall process that is transferred to decoding; (5) well solved after the upgrading Digital Television can't compatible original satellite TV system problem.
Description of drawings
Fig. 1 is traditional schematic diagram that set-top box is watched Digital Television that passes through.
Fig. 2 is the schematic diagram of simulated television Play System traditional in the hotel.
Fig. 3 is the schematic diagram of preferred embodiment of the digital television broadcasting system of total digitalization of the present utility model.
Fig. 4 is the schematic diagram of DVB-S front end deciphering module of the present utility model.
Fig. 5 is the schematic diagram of DVB-C front end deciphering module of the present utility model.
Fig. 6 is the schematic diagram of DMB-TH front end deciphering module of the present utility model.
Fig. 7 is the schematic diagram of an embodiment of multisystem digital television signal front end processing device of the present utility model.
Fig. 8 is the schematic diagram of the another embodiment of multisystem digital television signal front end processing device of the present utility model.
Fig. 9 is the schematic diagram of an embodiment again of multisystem digital television signal front end processing device of the present utility model.
Figure 10 is the schematic diagram of digital TV integrated machine of the present utility model.
Embodiment
The utility model will be further described below in conjunction with drawings and Examples.
Fig. 3 shows the structure of preferred embodiment of the digital television broadcasting system of total digitalization of the present utility model.See also Fig. 3, the digital television broadcasting system of total digitalization comprises: the multisystem digital television signal front end processing device 2, blender 3 and the Duo Tai that are positioned at front end (hotel's machine room) are positioned at the digital TV integrated machine 4 of terminal.Wherein multisystem digital television signal front end processing device 2 is front end processing devices that a kind of multi-modulation scheme is added the digital television signal of close mode.Existing digital television signal comprises DVB-S, DVB-C, three kinds of standards of DMB-TH.Multisystem digital television signal front end processing device 2 comprises DVB-S front end deciphering module 20, DVB-C front end deciphering module 22 and DMB-TH front end deciphering module 24, corresponding to the QAM modulator 26 of these front end deciphering modules.DVB-S front end deciphering module 20 receives the DVB-S signal, wakes up with a start the QPSK demodulation, and finishes descrambling work according to corresponding C A information, and the TS behind the output descrambling flow to QAM modulator 26.The QAM modulator 26 that is connected DVB-S front end deciphering module 20 outputs is modulated the TS stream of input by the QAM mode, output RF radiofrequency signal.DVB-C front end deciphering module 22 receives the DVB-C signal, carries out the QAM demodulation, and finishes descrambling work according to corresponding C A information, and the TS behind the output descrambling flow to QAM modulator 26.The QAM modulator 26 that is connected DVB-C front end deciphering module 20 outputs is modulated the TS stream of input by the QAM mode, output RF radiofrequency signal.DMB-TH front end deciphering module 24 receives the DMB-TH signal, carries out the DMB-TH demodulation, and finishes descrambling work according to corresponding C A information, and the TS behind the output descrambling flow to QAM modulator 26.The QAM modulator 26 that is connected DMB-TH front end deciphering module 24 is modulated the TS stream of input by the QAM mode, output RF radiofrequency signal.Above DVB-S, DVB-C, DMB-TH input signal all might adopt different CA to encrypt, and have three kinds of modulation systems respectively, and traditional receiving terminal for digital television all can not be accomplished to receive simultaneously.
The RF radio signal transmission of three kinds of standards of multisystem digital television signal front end processing device 2 outputs is to blender 3.Blender 3 mixes these RF radiofrequency signals, and exports these digital TV integrated machines 4 that are positioned at terminal to.
The theory structure of digital TV integrated machine sees also shown in Figure 10, and digital tuner 400 is used to receive the RF signal, the output intermediate-freuqncy signal.RJ45 interface 401 is twisted-pair Ethernet interfaces.Ethernet physical layer 402 is used for the realization of ethernet physical layer, and ethernet mac layer 403 is used for the realization of ethernet mac layer.HDMI decoder 404 is used for the HDMI signal is decoded, the output rgb signal.Video Decoder 405 is primarily aimed at the analog video signal (YPBPR/CVBS) of input and decodes, the output rgb signal.406 pairs of QAM signals of demodulation module carry out demodulation, output TS stream.407 pairs of TS streams of MPEG2 demultiplexing and decoder carry out demultiplexing, then the bag relevant with image with sound are decoded the output rgb signal.The video flowing of 408 pairs of inputs of image processing module carries out " image quality optimization ", " convergent-divergent " and processing such as " going interlacing ".MIPS CPU409 is a central processing unit, is responsible for whole system is controlled.
Fig. 4 shows the theory structure of DVB-S front end deciphering module 20.See also Fig. 4, DVB-S front end deciphering module 20 further comprises: digital tuner 204, I2C controller 206, microcontroller 208, DVB-S demodulation module 200 and DVB-CI descrambling module.Wherein digital tuner 204 receives the RF signal, the output intermediate-freuqncy signal.DVB-S demodulation module 200 carries out the QPSK demodulation with the RF signal that receives, the TS stream that output is encrypted.DVB-CI descrambling module 202 is finished descrambling according to the corresponding CAM card of CA replacing that the TS stream of encrypting is adopted, output TS free flow based on the separation between machine and card descrambling of pcmcia interface.Microcontroller 208 wherein is used for each module is coordinated and controlled, and I2C controller 206 is used for direct control figure tuner 204 and DVB-S demodulation module 200.
Fig. 5 shows the theory structure of DVB-C front end deciphering module 22.See also Fig. 5, DVB-C front end deciphering module 22 further comprises: digital tuner 224, I2C controller 226, microcontroller 228, DVB-C demodulation module 220, DVB-CI descrambling module 222.Wherein digital tuner 224 receives the RF signal, the output intermediate-freuqncy signal.DVB-C demodulation module 220 carries out the QAM demodulation with the RF signal that receives, the TS stream that output is encrypted.DVB-CI descrambling module 222 is finished descrambling according to the corresponding CAM card of CA replacing that encryption TS stream is adopted, output TS free flow based on the separation between machine and card descrambling of pcmcia interface.Microcontroller 228 wherein is used for each module is coordinated and controlled, and I2C controller 226 is used for direct control figure tuner 224 and DVB-C demodulation module 220.
Fig. 6 shows the theory structure of DMB-TH front end deciphering module 24.See also Fig. 6, DMB-TH front end deciphering module 24 further comprises: digital tuner 244, I2C controller 246, microcontroller 248, DMB-TH demodulation module 240, DVB-CI descrambling module 242.Wherein digital tuner 244 receives the RF signal, the output intermediate-freuqncy signal.DMB-TH demodulation module 240 carries out the DMB-TH demodulation with the RF signal that receives, the TS stream that output is encrypted.DVB-CI descrambling module 242 is finished descrambling according to the corresponding CAM card of CA replacing that encryption TS stream is adopted, output TS free flow based on the separation between machine and card descrambling of pcmcia interface.Microcontroller 248 wherein is used for each module is coordinated and controlled, and I2C controller 246 is used for direct control figure tuner 244 and DMB-TH demodulation module 240.
Fig. 7 shows the structure of the another embodiment of multisystem digital television signal front end processing device.See also Fig. 7, multisystem digital television signal front end processing device further comprises: DVB-S front end deciphering module 20, DVB-C front end deciphering module 22, corresponding to the QAM modulator 26 of these front end deciphering modules.DVB-S front end deciphering module 20 receives the DVB-S signal, wakes up with a start the QPSK demodulation, and finishes descrambling work according to corresponding C A information, and the TS behind the output descrambling flow to QAM modulator 26.The QAM modulator 26 that is connected DVB-S front end deciphering module 20 outputs is modulated the TS stream of input by the QAM mode, output RF radiofrequency signal.DVB-C front end deciphering module 22 receives the DVB-C signal, carries out the QAM demodulation, and finishes descrambling work according to corresponding C A information, and the TS behind the output descrambling flow to QAM modulator 26.The QAM modulator 26 that is connected DVB-C front end deciphering module 20 outputs is modulated the TS stream of input by the QAM mode, output RF radiofrequency signal.Above DVB-S, DVB-C, input signal all might adopt different CA to encrypt, and have two kinds of modulation systems respectively, and traditional receiving terminal for digital television all can not be accomplished to receive simultaneously.
Front end processing device shown in Figure 7 is replaceable in Fig. 3, thereby forms the another embodiment of the digital television broadcasting system of total digitalization, does not repeat them here.
Fig. 8 shows the structure of an embodiment again of multisystem digital television signal front end processing device.See also Fig. 8, comprise DVB-C front end deciphering module 22 and DMB-TH front end deciphering module 24, corresponding to the QAM modulator 26 of these front end deciphering modules.DVB-C front end deciphering module 22 receives the DVB-C signal, carries out the QAM demodulation, and finishes descrambling work according to corresponding C A information, and the TS behind the output descrambling flow to QAM modulator 26.The QAM modulator 26 that is connected DVB-C front end deciphering module 20 outputs is modulated the TS stream of input by the QAM mode, output RF radiofrequency signal.DMB-TH front end deciphering module 24 receives the DMB-TH signal, carries out the DMB-TH demodulation, and finishes descrambling work according to corresponding C A information, and the TS behind the output descrambling flow to QAM modulator 26.The QAM modulator 26 that is connected DMB-TH front end deciphering module 24 is modulated the TS stream of input by the QAM mode, output RF radiofrequency signal.Above DVB-C, DMB-TH input signal all might adopt different CA to encrypt, and have three kinds of modulation systems respectively, and traditional receiving terminal for digital television all can not be accomplished to receive simultaneously.
Front end processing device shown in Figure 8 is replaceable in Fig. 3, thereby forms an embodiment again of the digital television broadcasting system of total digitalization, does not repeat them here.
Fig. 9 shows the structure of another embodiment of multisystem digital television signal front end processing device.See also Fig. 9, comprise DVB-S front end deciphering module 20, DMB-TH front end deciphering module 24, corresponding to the QAM modulator 26 of these front end deciphering modules.DVB-S front end deciphering module 20 receives the DVB-S signal, wakes up with a start the QPSK demodulation, and finishes descrambling work according to corresponding C A information, and the TS behind the output descrambling flow to QAM modulator 26.The QAM modulator 26 that is connected DVB-S front end deciphering module 20 outputs is modulated the TS stream of input by the QAM mode, output RF radiofrequency signal.DMB-TH front end deciphering module 24 receives the DMB-TH signal, carries out the DMB-TH demodulation, and finishes descrambling work according to corresponding C A information, and the TS behind the output descrambling flow to QAM modulator 26.The QAM modulator 26 that is connected DMB-TH front end deciphering module 24 is modulated the TS stream of input by the QAM mode, output RF radiofrequency signal.Above DVB-S, DMB-TH input signal all might adopt different CA to encrypt, and have three kinds of modulation systems respectively, and traditional receiving terminal for digital television all can not be accomplished to receive simultaneously.
Front end processing device shown in Figure 9 is replaceable in Fig. 3, thereby forms another embodiment of the digital television broadcasting system of total digitalization, does not repeat them here.
The foregoing description provides to those of ordinary skills and realizes or use of the present utility model; those of ordinary skills can be under the situation that does not break away from invention thought of the present utility model; the foregoing description is made various modifications or variation; thereby protection range of the present utility model do not limit by the foregoing description, and should be the maximum magnitude that meets the inventive features that claims mention.
Claims (14)
1, a kind of multisystem digital television signal front end processing device is characterized in that, comprising:
The front end deciphering module of a plurality of different systems carries out demodulation to the digital signal of the different systems that receives and disturbs, the TS stream behind the output descrambling;
A plurality of QAM modulators are connected after each described front end deciphering module separately, the TS stream of input are modulated output RF signal by the QAM mode.
2, multisystem digital television signal front end processing device according to claim 1 is characterized in that, the front end deciphering module of described different systems further comprises:
DVB-S front end deciphering module receives the DVB-S signal, carries out the QPSK demodulation, and finishes descrambling work according to corresponding C A information, the TS stream behind the output descrambling.
3, multisystem digital television signal front end processing device according to claim 2 is characterized in that, this DVB-S front end deciphering module further comprises:
The numeral tuner receives the RF signal, the output intermediate-freuqncy signal;
The DVB-S demodulation module carries out the QPSK demodulation with the RF signal that receives, the TS stream that output is encrypted;
The DVB-CI descrambling module based on the separation between machine and card descrambling of pcmcia interface, is finished descrambling according to the corresponding condition receiving card of CA replacing that encryption TS stream is adopted, output TS free flow;
Microcontroller is used for coordination and control to each module;
The I2C controller is directly controlled this numeral tuner and this DVB-S demodulation module.
4, multisystem digital television signal front end processing device according to claim 1 is characterized in that, the front end deciphering module of described different systems further comprises:
DVB-C front end deciphering module receives the DVB-C signal, carries out the QAM demodulation, and finishes descrambling work according to corresponding C A information, the TS stream behind the output descrambling.
5, multisystem digital television signal front end processing device according to claim 4 is characterized in that, this DVB-C front end deciphering module further comprises:
The numeral tuner receives the RF signal, the output intermediate-freuqncy signal;
The DVB-C demodulation module carries out the QAM demodulation with the RF signal that receives, the TS stream that output is encrypted;
The DVB-CI descrambling module based on the separation between machine and card descrambling of pcmcia interface, is finished descrambling according to the corresponding condition receiving card of CA replacing that encryption TS stream is adopted, output TS free flow;
Microcontroller is used for coordination and control to each module;
The I2C controller is directly controlled this numeral tuner and this DVB-C demodulation module.
6, multisystem digital television signal front end processing device according to claim 1 is characterized in that, the front end deciphering module of described different systems further comprises:
DMB-TH front end deciphering module receives the DMB-TH signal, carries out the DMB-TH demodulation, and finishes descrambling work according to corresponding C A information, the TS stream behind the output descrambling.
7, multisystem digital television signal front end processing device according to claim 6 is characterized in that, this DMB-TH front end deciphering module further comprises:
The numeral tuner receives the RF signal, the output intermediate-freuqncy signal;
The DMB-TH demodulation module carries out the DMB-TH demodulation with the RF signal that receives, the TS stream that output is encrypted;
The DVB-CI descrambling module based on the separation between machine and card descrambling of pcmcia interface, is finished descrambling according to the corresponding condition receiving card of CA replacing that encryption TS stream is adopted, output TS free flow;
Microcontroller is used for coordination and control to each module;
The I2C controller is directly controlled this numeral tuner and this DMB-TH demodulation module.
8, a kind of digital television broadcasting system of total digitalization is characterized in that, comprising:
Multisystem digital television signal front end processing device comprises:
The front end deciphering module of a plurality of different systems carries out demodulation to the digital signal of the different systems that receives and disturbs, the TS stream behind the output descrambling;
A plurality of QAM modulators are connected after each described front end deciphering module separately, the TS stream of input are modulated output RF signal by the QAM mode;
Blender mixes the RF signal that this multisystem digital television signal front end processing device is exported;
Be positioned at a plurality of digital TV integrated machines of terminal, the output signal that receives this blender is play.
9, the digital television broadcasting system of total digitalization according to claim 8 is characterized in that, the front end deciphering module of described different systems further comprises:
DVB-S front end deciphering module receives the DVB-S signal, carries out the QPSK demodulation, and finishes descrambling work according to corresponding C A information, the TS stream behind the output descrambling.
10, the digital television broadcasting system of total digitalization according to claim 9 is characterized in that, this DVB-S front end deciphering module further comprises:
The numeral tuner receives the RF signal, the output intermediate-freuqncy signal;
The DVB-S demodulation module carries out the QPSK demodulation with the RF signal that receives, the TS stream that output is encrypted;
The DVB-CI descrambling module based on the separation between machine and card descrambling of pcmcia interface, is finished descrambling according to the corresponding condition receiving card of CA replacing that encryption TS stream is adopted, output TS free flow;
Microcontroller is used for coordination and control to each module;
The I2C controller is directly controlled this numeral tuner and this DVB-S demodulation module.
11, the digital television broadcasting system of total digitalization according to claim 9 is characterized in that, the front end deciphering module of described different systems further comprises:
DVB-C front end deciphering module receives the DVB-C signal, carries out the QAM demodulation, and finishes descrambling work according to corresponding C A information, the TS stream behind the output descrambling.
12, the digital television broadcasting system of total digitalization according to claim 11 is characterized in that, this DVB-C front end deciphering module further comprises:
The numeral tuner receives the RF signal, the output intermediate-freuqncy signal;
The DVB-C demodulation module carries out the QAM demodulation with the RF signal that receives, the TS stream that output is encrypted;
The DVB-CI descrambling module based on the separation between machine and card descrambling of pcmcia interface, is finished descrambling according to the corresponding condition receiving card of CA replacing that encryption TS stream is adopted, output TS free flow;
Microcontroller is used for coordination and control to each module;
The I2C controller is directly controlled this numeral tuner and this DVB-C demodulation module.
13, the digital television broadcasting system of total digitalization according to claim 8 is characterized in that, the front end deciphering module of described different systems further comprises:
DMB-TH front end deciphering module receives the DMB-TH signal, carries out the DMB-TH demodulation, and finishes descrambling work according to corresponding C A information, the TS stream behind the output descrambling.
14, the digital television broadcasting system of total digitalization according to claim 13 is characterized in that, this DMB-TH front end deciphering module further comprises:
The numeral tuner receives the RF signal, the output intermediate-freuqncy signal;
The DMB-TH demodulation module carries out the DMB-TH demodulation with the RF signal that receives, the TS stream that output is encrypted;
The DVB-CI descrambling module based on the separation between machine and card descrambling of pcmcia interface, is finished descrambling according to the corresponding condition receiving card of CA replacing that encryption TS stream is adopted, output TS free flow;
Microcontroller is used for coordination and control to each module;
The I2C controller is directly controlled this numeral tuner and this DMB-TH demodulation module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200603032U CN201188659Y (en) | 2008-06-25 | 2008-06-25 | Multi-standard digital television signal frontend processing device and digital television play system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200603032U CN201188659Y (en) | 2008-06-25 | 2008-06-25 | Multi-standard digital television signal frontend processing device and digital television play system |
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| Publication Number | Publication Date |
|---|---|
| CN201188659Y true CN201188659Y (en) | 2009-01-28 |
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| CNU2008200603032U Expired - Lifetime CN201188659Y (en) | 2008-06-25 | 2008-06-25 | Multi-standard digital television signal frontend processing device and digital television play system |
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| CN (1) | CN201188659Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109587422A (en) * | 2018-05-29 | 2019-04-05 | 深圳市鼎盛光电有限公司 | A kind of method, apparatus and terminal device demodulating Digital Radio TV signal |
-
2008
- 2008-06-25 CN CNU2008200603032U patent/CN201188659Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109587422A (en) * | 2018-05-29 | 2019-04-05 | 深圳市鼎盛光电有限公司 | A kind of method, apparatus and terminal device demodulating Digital Radio TV signal |
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Owner name: SHANGHAI HANGYUE INFORMATION + TECHNOLOGY CO., LTD Free format text: FORMER NAME: SHANGHAI SINO-VISION ELECTRONIC TECHNOLOGY CO., LTD. |
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Address after: 200235, No. 1525 West Zhongshan Road, Shanghai, building 5 Patentee after: SHANGHAI XINGYUE INFORMATION TECHNOLOGY CO., LTD. Address before: 200030, room 333, 612 Hongqiao Road, Shanghai, Xuhui District Patentee before: Shanghai Sino-Vision Electronic Technology Co., Ltd. |
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Address after: 200000 building 26, building 487, No. 3, Xuhui District, Shanghai, Tianlin Road Patentee after: Yue Yue information Polytron Technologies Inc Address before: 200235, No. 1525 West Zhongshan Road, Shanghai, building 5 Patentee before: SHANGHAI XINGYUE INFORMATION TECHNOLOGY CO., LTD. |
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