CN103227943A - Protection method, equipment and system of set top box - Google Patents
Protection method, equipment and system of set top box Download PDFInfo
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- CN103227943A CN103227943A CN2013101293946A CN201310129394A CN103227943A CN 103227943 A CN103227943 A CN 103227943A CN 2013101293946 A CN2013101293946 A CN 2013101293946A CN 201310129394 A CN201310129394 A CN 201310129394A CN 103227943 A CN103227943 A CN 103227943A
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Abstract
The embodiment of the invention provides a protection method, equipment and a system of a set top box. The method comprises the steps of allowing an LNB (Low Noise Block) power supplier to receive a first control signal transmitted by the set top box, resolving the first control signal and obtaining a first execution instruction according to a communication protocol between the LNB power supplier and the set top box, executing the first execution instruction and generating a second control signal supporting a communication protocol between signal receiving equipment and the LNB power supplier, and transmitting the second control signal to the signal receiving equipment. The method, the equipment and the system can improve the safety and reliability of the set top box during use, and lowers the heat dissipation cost of the set top box.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of guard method, equipment and system of set-top box.
Background technology
Satellite set top box is in the process of work, and its inner tuner LNB electric supply installation causes normally supporting the work of satellite set top box very easily because of the overcurrent problem that short circuit causes is damaged.In addition, when satellite set top box uses for a long time, the electric supply installation of set-top box self and LNB electric supply installation can produce very big heat, existing heat dissipation technology scheme need use large volume, expensive heat abstractor to solve the heat dissipation problem of set-top box, hindered satellite set top box and developed towards miniaturization, and consumes energy.
Prior art has proposed a kind of method of protecting the LNB electric supply installation in the satellite set top box at short circuit problem; in the LNB of satellite set top box electric supply installation, increase the current detecting short block that is used to detect the LNB electric supply installation; when the current detecting short block detected short circuit phenomenon, the prompting controller stopped the power supply of LNB electric supply installation immediately.The method of prior art has been protected the not impaired while of the LNB electric supply installation in the satellite set top box; also influenced user's normal use; no matter whether the detected short circuit phenomenon of current detecting short block really can damage the LNB electric supply installation; satellite set top box yet will not worked and can not be carried out communication with the outdoor signal receiving equipment because of the LNB electric supply installation, directly cause the user can't watch TV programme.In addition, prior art also fails to provide the heat sink conception that the volume that can be used for satellite set top box inside is little and cost is low.
Summary of the invention
The embodiment of the invention can improve fail safe and the reliability in the set-top box use, and reduces the heat radiation cost of set-top box.
Concrete, the guard method of the set-top box of the embodiment of the invention can comprise:
First control signal that tuner LNB charger receiving set up box sends;
Resolve described first control signal and obtain first execution command according to the communication protocol between described LNB charger and the described set-top box;
Carry out described first execution command and generate described second control signal, the communication protocol between described second control signal supporting signal receiving equipment and the described LNB charger;
Described second control signal is sent to described signal receiver.
Preferable, described first control signal is carried d. c. voltage signal.
Preferable, described second control signal is carried in polarizing voltage signal, square wave control signal or the many antenna controllers DISEQC control signal one or more.
Preferable, carry out described first execution command and generate described second control signal and comprise:
Extraction is also isolated the described d. c. voltage signal that carries in described first control signal;
Under the power protection state,, generate described polarizing voltage signal and keep the isolation of described polarizing voltage signal the processing that polarizes of described d. c. voltage signal;
Under the power protection state, generate described square wave control signal and described DISEQC control signal, and the described square wave control signal that will generate and described DISEQC control signal remain isolation according to first execution command;
Obtain described polarizing voltage signal, described square wave control signal and described DISEQC control signal and synthesize described second control signal.
Preferable, described second control signal is sent to described signal receiver after, also comprise:
Described LNB charger receives the intermediate frequency satellite-signal that described signal receiver sends, and to be described signal receiver resolve described signal receiver and carry out that the second corresponding high frequency satellite-signal that receives after executing instruction of described second control signal amplifies, obtain after the frequency-conversion processing according to described signal receiver and the communication protocol between the described LNB charger described intermediate frequency satellite-signal;
Described intermediate frequency satellite-signal is sent to described set-top box.
Accordingly, the tuner LNB charger that the embodiment of the invention provides can comprise:
Receiver module is used for first control signal that receiving set up box sends;
Parsing module is used for resolving described first control signal according to the communication protocol between described LNB charger and the described set-top box, obtains first execution command and is sent to Executive Module;
Executive Module is used to carry out described first execution command that receives from described parsing module, generates described second control signal, the communication protocol between described second control signal supporting signal receiving equipment and the described LNB charger;
Sending module is used for described second control signal that described Executive Module generates is sent to described signal receiver.
Preferable, described first control signal that described receiver module receives is carried d. c. voltage signal.
Preferable, described second control signal that described Executive Module generates is carried in polarizing voltage signal, square wave control signal and the antenna controller DISEQC control signal one or more.
Preferable, described Executive Module comprises:
First isolated location is used for extracting and isolating the described d. c. voltage signal that described first control signal is carried;
Polarizing voltage unit, described first isolation module keep under the isolation, are used for the processing that polarizes of described d. c. voltage signal is generated described polarizing voltage signal and is sent to signal synthesis unit;
The subsignal generation unit is used for generating described square wave control signal and described DISEQC control signal and being sent to described signal synthesis unit according to first execution command;
Second isolated location is used to isolate described square wave control signal and the described DISEQC control signal that described subsignal generation unit generates;
Protected location is used to protect described polarizing voltage unit and described subsignal generation unit;
Signal synthesis unit is used to receive the described polarizing voltage signal that described polarizing voltage unit sends, described square wave control signal and the described DISEQC control signal that described subsignal generation unit sends, and is synthetic and generate second control signal.
Preferable, described receiver module also is used to receive the intermediate frequency satellite-signal that described signal receiver sends, and to be described signal receiver resolve described signal receiver and carry out that the second corresponding high frequency satellite-signal that receives after executing instruction of described second control signal amplifies, obtain after the frequency-conversion processing according to described signal receiver and the communication protocol between the described LNB charger described intermediate frequency satellite-signal;
Described sending module also is used for described intermediate frequency satellite-signal is sent to described set-top box.
Accordingly, the set-top box protection system that the embodiment of the invention provides can comprise:
Set-top box is used to send first and controls signal to tuner LNB charger, and described first control signal is supported the communication protocol between described set-top box and the described LNB charger;
Signal receiver is used to receive second control signal that described LNB charger sends, and described second control signal is supported the communication protocol between described signal receiver and the described LNB charger;
Tuner LNB charger is aforesaid LNB charger.
Preferable,
Described set-top box also is used for generating first control signal according to the communication protocol between described set-top box and the described LNB charger; Also be used to receive the intermediate frequency satellite-signal that described LNB charger sends;
Described signal receiver also is used for resolving and carry out the second corresponding execution command of described second control signal according to described signal receiver and the communication protocol between the described LNB charger; After also being used to carry out second execution command, receive corresponding high frequency satellite-signal; Also be used for to described high frequency satellite-signal amplify, frequency-conversion processing, generate the intermediate frequency satellite-signal and also be sent to described LNB charger;
Described LNB charger is aforesaid LNB charger.
The embodiment of the invention can improve fail safe and the reliability in the set-top box use, and reduces the heat radiation cost of set-top box.
Description of drawings
In order to be illustrated more clearly in the technical scheme of the embodiment of the invention, to do simple the introduction to the accompanying drawing of required use among the embodiment below, apparently, accompanying drawing in describing below only is some embodiment of the embodiment of the invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is an embodiment schematic flow sheet of the guard method of set-top box of the present invention;
Fig. 2 is that an example structure of tuner LNB charger of the present invention is formed schematic diagram;
Fig. 3 is that another example structure of tuner LNB charger of the present invention is formed schematic diagram;
Fig. 4 is an embodiment schematic flow sheet of the protection system of set-top box of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
The embodiment of the invention provides a kind of guard method of set-top box, and it can comprise: tuner LNB charger and set-top box, signal receiver connect; Described LNB charger receives first control signal that described set-top box sends; Resolve described first control signal and obtain first execution command according to the communication protocol between described LNB charger and the described set-top box; Carry out described first execution command and generate described second control signal, described second control signal is supported the communication protocol between described signal receiver and the described LNB charger; Described second control signal is sent to described signal receiver.The tuner LNB charger of the embodiment of the invention can be supported set-top box work preferably, can avoid handling and generating the set-top box infringement that causes because of overcurrent in the control signal process.
Below in conjunction with the drawings and the specific embodiments, the technical scheme of the embodiment of the invention is elaborated.
As shown in Figure 1, an embodiment of the guard method of set-top box provided by the invention can may further comprise the steps:
Step S110, first control signal that tuner LNB charger receiving set up box sends.Wherein, the LNB charger of mentioning in the embodiment of the invention be a kind of be used to cooperate and carry out the set-top box control command, can compatible existing set-top box and signal receiver communication protocol and generate the novel device of the control signal that is used for the control signal receiving equipment according to this agreement, described existing communication agreement can comprise 13/18V control signal processing method, 0/22Hz control signal processing method and Diseqc control signal processing method; The set-top box of mentioning in the embodiment of the invention is a kind of set-top box by LNB charger control signal receiving equipment, its with the LNB charger between the communication protocol that pre-sets of existence; The first mentioned control signal of the embodiment of the invention is the control signal of first communication protocol between a kind of LNB of support charger and the set-top box.First communication protocol that the embodiment of the invention is mentioned is the communication protocol that supplier is pre-defined according to operating position and be provided with, first control signal be formulated and be sent to set-top box can by this agreement, and first execution command that needs execution be resolved and be obtained to the LNB charger can by first control signal that this agreement will receive.In addition, in the embodiment of the invention, first control signal that the LNB charger receives is generally used for indicating the LNB charger to generate second control signal that is used for the control signal receiving equipment, and comprise the polarizing voltage signal in second control signal of appointment, carry out the voltage signal processing so carry d. c. voltage signal in first control signal that set-top box sends for the LNB charger.
Step S111 resolves first control signal and obtains first execution command according to the communication protocol between LNB charger and the set-top box.First control signal of mentioning as step S110, this step is used for obtaining and corresponding first execution command of first control signal by the communication protocol between LNB charger and the set-top box, and first execution command can be carried second control signal of polarizing voltage signal, square wave control signal or many antenna controllers DISEQC control signal for generation.For example, the LNB charger can get access to and generate first execution command of carrying second control signal of horizontal polarization voltage signal, square wave control signal and DISEQC control signal and being sent to signal receiver in this step, wherein, the horizontal polarization voltage signal can obtain by handling the d. c. voltage signal that carries in first control signal.The signal receiver of mentioning in the embodiment of the invention is that a kind of satellite of broad sense receives forwarding unit, low noise block downconverter LNB that comprise the antenna system (feed) that is used for receiving satellite signal, the satellite-signal that receives is handled and relevant various types of signal switch.
Step S112 carries out first execution command and generates second control signal.Wherein, second control signal is carried in polarizing voltage signal, square wave control signal or the many antenna controllers DISEQC control signal one or more.The concrete enforcement of this step can comprise: extract and isolate the d. c. voltage signal that carries in first control signal; Under the power protection state,, generate the polarizing voltage signal and keep the isolation of polarizing voltage signal the d. c. voltage signal processing that polarizes; Under the power protection state, generate square wave control signal and DISEQC control signal, and square wave control signal and the DISEQC control signal that generates remained isolation according to first execution command; Obtain polarizing voltage signal, square wave control signal and DISEQC control signal and synthesize second control signal.
In the specific implementation, extracting and isolating the d. c. voltage signal that carries in first control signal mainly is to desire to handle under isolation this d. c. voltage signal, and the effect of isolation is other control signals of avoiding this d. c. voltage signal to disturb the LNB charger to generate.
In the specific implementation, owing to comprise the polarizing voltage control signal of 13/18V in the communication protocol between existing signal receiver and the set-top box, so can be according to first execution command that gets access to the direct voltage control signal of the extracting processing that under isolation, polarizes, for example, if first execution command is for to carry out the instruction of horizontal polarization with this d. c. voltage signal, then under isolation, this d. c. voltage signal is carried out horizontal polarization and handle, generate the horizontal polarization voltage signal of 18V.In addition, this step is carried out under the power protection state, because the heavy current that polarization process produces may cause the overcurrent damage of LNB charger, so the LNB charger inside of the embodiment of the invention has also comprised apparatus for protecting power supply.
In the specific implementation; under the power protection state, generate square wave control signal and DISEQC control signal according to first execution command; and square wave control signal and the DISEQC control signal that generates remained isolation; wherein, square wave control signal or DISEQC control signal are actually a kind of height square wave that change, that be used for being modulated at second control signal.Because square wave control signal that generates and DISEQC control signal very easily are subjected to the inner high frequency voltage influence of LNB charger, may produce the nonstandard hidden danger of waveform, the signal that generates also needs to protect under isolation.Owing to may cause the overcurrent damage of LNB charger in the waveform signal production process, so the apparatus for protecting power supply of the LNB charger inside of the embodiment of the invention plays a protective role in this process too.
In the specific implementation, obtain polarizing voltage signal, square wave control signal and DISEQC control signal and synthesize second control signal.This process is the process of a kind of signal stack, will be used to point out control signal with the control signal receiving equipment to be superimposed upon on the polarizing voltage signal and synthesizes second control signal.
Step S113 is sent to signal receiver with second control signal.The mentioned content of step as described above, second control signal of the embodiment of the invention is the control signal of the second communication agreement between a kind of LNB of support charger and the signal receiver, and existing set-top box of described second communication protocol-compliant and signal receiver communication protocol, so signal receiver can be resolved described second control signal and carry out corresponding instruction after being received second control signal of LNB charger transmission according to existing communication protocol.Step as the aforementioned, second control signal that the LNB charger of the embodiment of the invention will carry polarizing voltage signal, square wave control signal and DISEQC control signal is sent to signal receiver, signal receiver can be resolved this second control signal according to existing protocol, operates according to execution command wherein.For example, carried horizontal polarization voltage signal and DISEQC control signal in second control signal, then signal receiver needs to open corresponding switch according to the horizontal polarization voltage signal that receives, and makes corresponding processing according to the DISEQC control signal.
In addition, the intermediate frequency satellite-signal that the LNB charger of the embodiment of the invention can also the received signal receiving equipment sends, and this intermediate-freuqncy signal is sent to set-top box.Wherein, this intermediate frequency satellite-signal is that signal receiver carry out to resolve and carry out that the high frequency satellite-signal that receives after second execution command of the second control signal correspondence amplifies, obtains after the frequency-conversion processing.After set-top box receives the described intermediate frequency satellite-signal that the LNB charger transmits, this intermediate frequency satellite-signal can be carried out frequency modulation, demodulation, spatially selecting filtering, decoding, demultiplexing after, export each assonance, vision signal.
The embodiment of the invention is to have increased a kind of set-top box that is subjected in the transmission line of set-top box and signal receiver to control; can generate the LNB charger of the control signal that is used for the control signal receiving equipment; in the LNB charger, generate the control signal process; the infringement of having avoided factors such as overcurrent that set-top box is produced effectively; than the method for avoiding damage factor in the signal receiver control signal generative process that increases overcurrent protective device in set-top box that prior art proposes, the method that the embodiment of the invention is carried out the signal receiver control signal by the LNB charger protects set-top box to have security reliability and practicality more.
Accordingly, a kind of tuner LNB charger that is used to protect set-top box that the embodiment of the invention provides, it can comprise receiver module, is used for first control signal that receiving set up box sends; Parsing module is used for resolving described first control signal according to the communication protocol between described LNB charger and the described set-top box, obtains first execution command and is sent to Executive Module; Executive Module is used to carry out described first execution command that receives from described parsing module, generates described second control signal, the communication protocol between described second control signal supporting signal receiving equipment and the described LNB charger; Sending module is used for described second control signal that described Executive Module generates is sent to described signal receiver.The tuner LNB charger of the embodiment of the invention can be supported set-top box work preferably, can make set-top box avoid suffering damage in generating signal receiver control signal process, has security reliability and practicality.
Below in conjunction with the drawings and the specific embodiments, the technical scheme of installing in the embodiment of the invention is elaborated.
Fig. 2 is that the structure of the tuner LNB charger of the embodiment of the invention is formed schematic diagram.The device of this embodiment can be used for implementing way shown in Figure 1; concrete; the device of this embodiment comprises: receiver module 21, parsing module 22, Executive Module 23 and sending module 24; can be in the lump form schematic diagram wherein with reference to another structure of the tuner LNB charger of the embodiment of the invention shown in Figure 3; Executive Module 23 can further comprise first isolated location 231, polarizing voltage unit 232, subsignal generation unit 233, second isolated location 234, signal synthesis unit 235 and protected location 236, wherein:
Receiver module 21 is used for first control signal that receiving set up box sends.Wherein, first control signal is carried the d. c. voltage signal that is used to generate the polarizing voltage voltage signal; First control signal is a kind of control signal of supporting first communication protocol; First communication protocol is that a kind of supplier is pre-defined and be provided with, be present in the communication protocol between LNB charger and the set-top box according to operating position, set-top box can compile first control signal according to first communication protocol, and the LNB charger can be resolved first control signal according to first control protocol.In addition, the LNB charger of the embodiment of the invention is connected with set-top box by coaxial cable, so first control signal that receiver module 21 receives is by coaxial cable transmission.
Parsing module 22 is used for resolving first control signal according to the communication protocol between LNB charger and the set-top box, obtains first execution command and is sent to Executive Module 23.This module can be carried out dissection process by microprocessor unit MCU in the hardware circuit that comprises in the LNB charger; In addition, first execution command that gets access in the present embodiment can be carried second control signal of polarizing voltage signal, square wave control signal or many antenna controllers DISEQC control signal for generation.
First isolated location 231 is used for extracting and isolating the d. c. voltage signal that first control signal is carried.In the specific implementation, isolate the d. c. voltage signal that carries in first control signal and can carry out insulation blocking, avoid d. c. voltage signal to influence the work of other devices in the LNB charger by the high-frequency isolation device.
Polarizing voltage unit 232, the first isolation modules 231 keep under the isolations, are used for d. c. voltage signal processings that polarize, and generation polarizing voltage signal also is sent to signal synthesis unit 235.In the specific implementation, can carry out polarizations by a kind of programmable power supply device and handle, for example, when the polarization control command is level in first execution command, the programmable power supply device can carry out d. c. voltage signal horizontal polarization to be handled, and generates the horizontal polarization voltage signal of 18VLNB voltage.
Subsignal generation unit 233 is used for generating square wave control signal and DISEQC control signal and being sent to signal synthesis unit 235 according to first execution command.In the specific implementation, square wave control signal and DISEQC control signal are a kind ofly also can carry out the conciliation and the output of signal by the conciliation device of a kind of programmable power supply device inside, and subsignal generation unit 233 can be by programmable power supply device output square wave control signal stable, standard and DISEQC control signal.
Second isolated location 234 is used for square wave control signal and DISEQC control signal that separaant signal generation unit 233 generates.In the specific implementation; square wave control signal and DISEQC control signal that separaant signal generation unit 233 generates also can be carried out insulation blocking by the high-frequency isolation device, avoid the square wave control signal and the DISEQC control signal of d. c. voltage signal or 233 outputs of polarizing voltage effect of signals subsignal generation unit.
Protected location 236 is used to protect polarizing voltage unit 232 and subsignal generation unit 233.Protected location 236 can be a kind of protective circuit device; be mainly used to protect the polarizing voltage unit 232 and the subsignal generation unit 233 that are used to generate polarizing voltage signal, square wave control signal and DISEQC control signal, make and avoid occurring overcurrent, overvoltage damage in the process that generates signal.
Sending module 24 is used for second control signal that Executive Module 23 generates is sent to signal receiver.In the specific implementation, the LNB charger is connected with signal receiver by coaxial cable, so sending module 24 also is sent to signal receiver by coaxial cable with second control signal.Signal receiver will be carried out corresponding instruction according to agreement after receiving this second control signal.
In addition, the LNB charger of the embodiment of the invention also is used for the intermediate frequency satellite-signal that signal receiver sends is transferred to set-top box.In the specific implementation, carry out pairing second control command of second control signal of LNB charger transmission when signal receiver after, the high frequency satellite-signal that carries audio, video data that can will receive from the base station amplifies, after the frequency-conversion processing, the intermediate frequency satellite-signal that carries audio, video data that generates is transferred to the LNB charger, after the receiver module 21 of LNB charger receives this intermediate frequency satellite-signal so, also will the intermediate frequency satellite-signal that this carries audio, video data be sent to set-top box, and make the user obtain audio, video data information by set-top box by sending module 24.
In addition, the programmable power supply device of mentioning in the embodiment of the invention as polarizing voltage unit 232 and subsignal generation unit 233 also is used to the MCU power supply as parsing module 22 simultaneously; Owing in the embodiment of the invention, all by the coaxial cable transmission,, need signal transmission after ac signal is coupled of transmission during LNB supply module output signal so also need corresponding signal coupling apparatus.
The LNB charger of the embodiment of the invention mainly supports by the control of MCU and set-top box, signal receiver mutual: had new host-host protocol between itself and the set-top box, and the signal transfer protocol between reservation and the signal receiver, resolve and generate the signal receiver control signal by new host-host protocol, but the better protect set-top box makes set-top box avoid generating in the signal receiver control signal process and suffers damage; MCU in the LNB charger owing to have preferably analyzes, calculating, memory function, so make the LNB charger have stronger compatibility, can resolve the control signal of multiple set-top box and carry out corresponding instruction by write multiple transport protocols in MCU; It connects standard, debugging is convenient, can generate stable polarizing voltage signal, square wave control signal and DISEQC control signal under the state of insulation blocking, and the signal receiver control signal of the output of standard after the signal stack has reliability; Its circuit arrangement is simple in structure, and cost is low, has broad applicability, practicality, and can have the high product degree of recognition.
Accordingly; a kind of set-top box protection system that the embodiment of the invention provides; can form schematic diagram with reference to set-top box protection system structure shown in Figure 4; the set-top box protection system of the embodiment of the invention can comprise set-top box 41, tuner LNB charger 42 and signal receiver 43; it is characterized in that, comprising:
Set-top box 41 sends first and controls signal to LNB charger 42.Wherein, first control signal of set-top box 41 generations is supported the communication protocol between set-top box 41 and the LNB charger 42.The mentioned content of embodiment as described above, set-top box 41 can generate first control signal according to the communication protocol between set-top box 41 and the LNB charger 42, and indication LNB charger 42 is carried out corresponding first execution command.
In the system of the embodiment of the invention, when set-top box 41 is desired to obtain the satellite-signal of a certain frequency range, at first generate first control signal and be sent to LNB charger 42 according to the communication protocol between set-top box 41 and the LNB charger 42; After LNB charger 42 receives this first control signal, resolve first control signal by the communication protocol between itself and the set-top box 41, and obtain first control command, this instruction is used to indicate LNB charger 42 to generate second control signal that is used for control signal receiving equipment 43 according to the communication protocol between LNB charger 42 and the signal receiver 43, make signal receiver 43 carry out corresponding instruction and obtain the satellite-signal of corresponding band, wherein, portability polarizing voltage signal in second control signal, in square wave control signal or the many antenna controllers DISEQC control signal one or more; After signal receiver 43 is received second control signal of LNB charger 42 transmissions, resolve second control signal according to the communication protocol between LNB charger 42 and the signal receiver 43, and obtain second control command, this instruction is used to indicate signal receiver 43 to obtain the satellite-signal of corresponding band.
In the system of the embodiment of the invention, signal receiver 43 is carried out second control command also according to after getting access to the high frequency satellite-signal of corresponding band, also the high frequency satellite-signal is amplified, frequency-conversion processing, generate the intermediate frequency satellite-signal and also be sent to LNB charger 42; LNB charger 42 also transfers to set-top box 41 with this intermediate frequency satellite-signal after receiving the intermediate frequency satellite-signal of signal receiver 43 transmissions; After set-top box 41 receives this intermediate frequency satellite-signal, can carry out frequency modulation, demodulation, spatially selecting filtering, decoding, demultiplexing to this intermediate frequency satellite-signal after, export each assonance, vision signal.
In the specific implementation, because in the system of the embodiment of the invention, 41 need of set-top box can make LNB charger 42 generate corresponding signal receiver 43 control signals by exporting first control signal, so the embodiment of the invention also proposes and has adopted a kind of novel set-top box that does not comprise the LNB supply module simultaneously, have communication protocol default between itself and the LNB charger 42 in the primary processor of this novel set-top box, comprise the coupling device that first control signal and alternating current are coupled in this novel set-top box.Compare with the set-top box of prior art, the set-top box 41 of the embodiment of the invention is not owing to contain LNB supply module and LNB supply module heat abstractor, thereby production cost is lower, can have the little characteristics of volume, also can avoid because overcurrent, the over-voltage protection that produces in the LNB supply module running, be used with aforesaid LNB charger 42, have preferably reliability, practicality widely.
In the specific implementation, LNB charger 42 in the system of the embodiment of the invention is owing to generate second control signal after can obtaining first control command according to first control signal of set-top box 41, so the overcurrent risk that produces all can be born by LNB charger 42 in the course of the work, has security reliability; LNB charger 42 is easy to debugging in process of production, and production cost is low, can write and preserve various protocols, as the existing communication agreement and the new communication protocol that may occur, has compatible preferably; LNB charger 42 is in the process of using, and maintenance is convenient, and is easy to change, and does not cause and uses the inconvenience or the wasting of resources, has practicality.
The system of the embodiment of the invention can guarantee the safe handling of set-top box 41 in the process of work; Because LNB charger 42 has stronger compatibility in the system of the embodiment of the invention,, can support multiple set-top box by the control LNB charger 42 that transmits control signal so the system of the embodiment of the invention also has stronger compatibility; LNB charger 42 convenient maintenance and replacings in the embodiment of the invention system are so have stronger reliability in the system work process.
One of ordinary skill in the art will appreciate that all or part of flow process that realizes in the foregoing description method, be to instruct relevant hardware to finish by computer program, described program can be stored in the computer read/write memory medium, this program can comprise the flow process as the embodiment of above-mentioned each side method when carrying out.Wherein, described storage medium can be magnetic disc, CD, read-only storage memory body (Read-Only Memory, ROM) or at random store memory body (Random Access Memory, RAM) etc.
Above disclosed only is preferred embodiment of the present invention, certainly can not limit the present invention's interest field with this, one of ordinary skill in the art will appreciate that all or part of flow process that realizes the foregoing description, and, still belong to the scope that invention is contained according to the equivalent variations that claim of the present invention is done.
Claims (12)
1. the guard method of a set-top box is characterized in that, comprising:
First control signal that tuner LNB charger receiving set up box sends;
Resolve described first control signal and obtain first execution command according to the communication protocol between described LNB charger and the described set-top box;
Carry out described first execution command and generate described second control signal, the communication protocol between described second control signal supporting signal receiving equipment and the described LNB charger;
Described second control signal is sent to described signal receiver.
2. guard method as claimed in claim 1 is characterized in that, described first control signal is carried d. c. voltage signal.
3. guard method as claimed in claim 1 is characterized in that, described second control signal is carried in polarizing voltage signal, square wave control signal or the many antenna controllers DISEQC control signal one or more.
4. as each described guard method of claim 1-3, it is characterized in that, carry out described first execution command and generate described second control signal and comprise:
Extraction is also isolated the described d. c. voltage signal that carries in described first control signal;
Under the power protection state,, generate described polarizing voltage signal and keep the isolation of described polarizing voltage signal the processing that polarizes of described d. c. voltage signal;
Under the power protection state, generate described square wave control signal and described DISEQC control signal, and the described square wave control signal that will generate and described DISEQC control signal remain isolation according to first execution command;
Obtain described polarizing voltage signal, described square wave control signal and described DISEQC control signal and synthesize described second control signal.
5. guard method as claimed in claim 1 is characterized in that, described second control signal is sent to described signal receiver after, also comprise:
Described LNB charger receives the intermediate frequency satellite-signal that described signal receiver sends, and to be described signal receiver resolve described signal receiver and carry out that the second corresponding high frequency satellite-signal that receives after executing instruction of described second control signal amplifies, obtain after the frequency-conversion processing according to described signal receiver and the communication protocol between the described LNB charger described intermediate frequency satellite-signal;
Described intermediate frequency satellite-signal is sent to described set-top box.
6. a tuner LNB charger is characterized in that, comprising:
Receiver module is used for first control signal that receiving set up box sends;
Parsing module is used for resolving described first control signal according to the communication protocol between described LNB charger and the described set-top box, obtains first execution command and is sent to Executive Module;
Executive Module is used to carry out described first execution command that receives from described parsing module, generates described second control signal, the communication protocol between described second control signal supporting signal receiving equipment and the described LNB charger;
Sending module is used for described second control signal that described Executive Module generates is sent to described signal receiver.
7. tuner LNB charger as claimed in claim 6 is characterized in that, described first control signal that described receiver module receives is carried d. c. voltage signal.
8. tuner LNB charger as claimed in claim 7 is characterized in that, described second control signal that described Executive Module generates is carried in polarizing voltage signal, square wave control signal and the antenna controller DISEQC control signal one or more.
9. as each described tuner LNB charger of claim 6-8, it is characterized in that described Executive Module comprises:
First isolated location is used for extracting and isolating the described d. c. voltage signal that described first control signal is carried;
Polarizing voltage unit, described first isolation module keep under the isolation, are used for the processing that polarizes of described d. c. voltage signal is generated described polarizing voltage signal and is sent to signal synthesis unit;
The subsignal generation unit is used for generating described square wave control signal and described DISEQC control signal and being sent to described signal synthesis unit according to first execution command;
Second isolated location is used to isolate described square wave control signal and the described DISEQC control signal that described subsignal generation unit generates;
Protected location is used to protect described polarizing voltage unit and described subsignal generation unit;
Signal synthesis unit is used to receive the described polarizing voltage signal that described polarizing voltage unit sends, described square wave control signal and the described DISEQC control signal that described subsignal generation unit sends, and is synthetic and generate second control signal.
10. tuner LNB charger as claimed in claim 6 is characterized in that,
Described receiver module, also be used to receive the intermediate frequency satellite-signal that described signal receiver sends, to be described signal receiver resolve described signal receiver and carry out that the second corresponding high frequency satellite-signal that receives after executing instruction of described second control signal amplifies, obtain after the frequency-conversion processing according to described signal receiver and the communication protocol between the described LNB charger described intermediate frequency satellite-signal;
Described sending module also is used for described intermediate frequency satellite-signal is sent to described set-top box.
11. a set-top box protection system is characterized in that, comprising:
Set-top box is used to send first and controls signal to tuner LNB charger, and described first control signal is supported the communication protocol between described set-top box and the described LNB charger;
Signal receiver is used to receive second control signal that described LNB charger sends, and described second control signal is supported the communication protocol between described signal receiver and the described LNB charger;
Tuner LNB charger is the described LNB charger of claim 6.
12. set-top box protection system as claimed in claim 11 is characterized in that,
Described set-top box also is used for generating first control signal according to the communication protocol between described set-top box and the described LNB charger; Also be used to receive the intermediate frequency satellite-signal that described LNB charger sends;
Described signal receiver also is used for resolving and carry out the second corresponding execution command of described second control signal according to described signal receiver and the communication protocol between the described LNB charger; After also being used to carry out second execution command, receive corresponding high frequency satellite-signal; Also be used for to described high frequency satellite-signal amplify, frequency-conversion processing, generate the intermediate frequency satellite-signal and also be sent to described LNB charger;
Described LNB charger is each described LNB charger of claim 7-10.
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