CN111586374B - Satellite receiver system and control method thereof - Google Patents
Satellite receiver system and control method thereof Download PDFInfo
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- CN111586374B CN111586374B CN202010434133.5A CN202010434133A CN111586374B CN 111586374 B CN111586374 B CN 111586374B CN 202010434133 A CN202010434133 A CN 202010434133A CN 111586374 B CN111586374 B CN 111586374B
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000001514 detection method Methods 0.000 claims description 9
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- 230000009977 dual effect Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/20—Adaptations for transmission via a GHz frequency band, e.g. via satellite
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/426—Internal components of the client ; Characteristics thereof
- H04N21/42607—Internal components of the client ; Characteristics thereof for processing the incoming bitstream
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/61—Network physical structure; Signal processing
- H04N21/6106—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
- H04N21/6143—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving transmission via a satellite
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/61—Network physical structure; Signal processing
- H04N21/6156—Network physical structure; Signal processing specially adapted to the upstream path of the transmission network
- H04N21/6193—Network physical structure; Signal processing specially adapted to the upstream path of the transmission network involving transmission via a satellite
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- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- General Physics & Mathematics (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Abstract
The invention discloses a satellite receiver system and a control method thereof, wherein the control method comprises the following steps: when the two set top boxes both indicate that the double local oscillator tuner selects high local oscillator to receive high frequency band satellite signals, a 22k switch is turned on, and the first set top box is controlled to send a first pulse signal to the double local oscillator tuner and lock the frequency; and controlling the second set top box to send a second pulse signal to the double-local-oscillator tuner and try to lock the frequency, and closing the 22k switch when the second set top box fails to lock the frequency. Therefore, the two set top boxes can work simultaneously and can be prevented from interfering with each other.
Description
Technical Field
The present invention relates to communications technologies, and in particular, to a satellite receiving system and a control method thereof.
Background
In some small network application scenarios such as home networks, due to limitations of space, cost, and the like, a satellite pan and a Low Noise Block (LNB) are usually adopted to amplify, downconvert, and the like, the received satellite signals, and are connected to a plurality of set top boxes through power splitters, so that different televisions can watch satellite programs through the set top boxes.
Because the satellite signals include high-frequency band signals (such as Ku band signals of 11.5GHz to 12.75GHz, etc.) and low-frequency band signals (such as Ku band signals of 10.7GHz to 11.9GHz, etc.), the set-top box generally selects a high local oscillator (such as 10.6GHz, etc.) or a low local oscillator (such as 9.75GHz, etc.) through the LNB, so as to respectively reduce the satellite signals of the high-frequency band or the low-frequency band to a frequency range (such as 950MHz to 2150MHz, etc.) receivable by the set-top box through a down-conversion mode, so that a user can watch satellite programs of different frequency bands. In the prior art, an indication signal output by different set top boxes is input to an LNB after being superimposed by a power divider to indicate that the LNB selects a high local oscillator or a low local oscillator.
When two or more set top boxes simultaneously output pulse signals to indicate an LNB to select a high local oscillator to receive a high-frequency satellite signal, because 22K signals generated by the two or more set top boxes have different phases, the waveform of the 22K signal entering the LNB is jittered and the amplitude of the 22K signal is reduced, the LNB cannot be identified, the local oscillator cannot be switched and locked, and the set top boxes cannot lock the frequency.
Disclosure of Invention
In view of the above, the present invention provides a satellite receiving system and a control method thereof.
In order to achieve the purpose, the technical scheme of the invention is realized as follows: a control method of a satellite receiving system, the satellite receiving system comprising: the system comprises a double-local-oscillator tuner, a 22k switch and a power divider, wherein the power divider is connected with two set top boxes; the method comprises the following steps: when the two set top boxes indicate that the double local oscillator tuner selects the high local oscillator to receive the high frequency band satellite signal, a 22k switch is turned on, and the first set top box is controlled to send a first pulse signal to the double local oscillator tuner and lock the frequency; and controlling the second set top box to send a second pulse signal to the double-local-oscillator tuner and try to lock the frequency, and closing the 22k switch when the second set top box fails to lock the frequency.
Optionally, the method further comprises the following steps: when receiving a command of closing the first set top box and confirming that the first set top box and the second set top box are both in working states, controlling the first set top box to be closed; and when the 22k switch is determined to be in a closed state and the frequency of the second set top box is unlocked, the 22k switch is opened, and the second set top box is controlled to send a second pulse signal to the double-local-oscillator tuner and lock the frequency.
Optionally, the method further comprises the following steps: when an instruction for closing the first set top box is received and the first set top box and the second set top box are confirmed to be in working states, the first set top box is controlled to be closed; and when the 22k switch is determined to be turned on, controlling a second set top box to send a second pulse signal to the double-local oscillator tuner and locking the frequency.
The present embodiment further provides a satellite receiving system, including: the system comprises a double-local-oscillator tuner, a 22k switch and a power divider, wherein the power divider is connected with two set top boxes; the system also comprises the following modules: the first detection module is used for turning on a 22k switch when the two set top boxes are determined to indicate that the double local oscillator tuner selects a high local oscillator to receive a high frequency band satellite signal, and controlling the first set top box to send a first pulse signal to the double local oscillator tuner and lock the frequency; and the first processing module is used for controlling the second set top box to send a second pulse signal to the double-local-oscillator tuner and try to lock the frequency, and closing the 22k switch when the second set top box fails to lock the frequency.
Optionally, the following modules are further included: the second detection module is used for controlling the first set top box to be closed when receiving the instruction of closing the first set top box and confirming that the first set top box and the second set top box are both in the working state; and the second processing module is used for opening the 22k switch and controlling the second set top box to send a second pulse signal to the double-local-oscillator tuner and lock the frequency when the 22k switch is determined to be in the closed state and the frequency of the second set top box is unlocked.
Optionally, the following modules are further included: the third detection module is used for controlling the first set top box to be closed when receiving the instruction of closing the first set top box and confirming that the first set top box and the second set top box are both in the working state; and the third processing module is used for controlling a second set top box to send a second pulse signal to the double-local-oscillator tuner and lock the frequency when the 22k switch is determined to be turned on.
The satellite receiving system and the control method thereof provided by the embodiment of the invention have the following advantages: the invention discloses a satellite receiver system and a control method thereof, wherein the control method comprises the following steps: when the two set top boxes both indicate that the double local oscillator tuner selects high local oscillator to receive high frequency band satellite signals, a 22k switch is turned on, and the first set top box is controlled to send a first pulse signal to the double local oscillator tuner and lock the frequency; and controlling the second set top box to send a second pulse signal to the double-local-oscillator tuner and try to lock the frequency, and closing the 22k switch when the second set top box fails to lock the frequency. Therefore, the two set top boxes can work simultaneously, and the two set top boxes can be prevented from interfering with each other.
Drawings
Fig. 1 is a flowchart illustrating a control method of a satellite receiving system.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments shown in the drawings. These embodiments do not limit the present invention, and structural, methodological, or functional changes made by those skilled in the art according to these embodiments are included in the scope of the present invention
The embodiment of the invention can be applied to small-sized network scenes such as a home network and the like. Taking a home network scene as an example, a plurality of set top boxes connected with different televisions in a plurality of rooms are connected with a satellite pot through a power divider, so that a satellite television receiving system is formed to receive satellite signals and watch satellite programs. The satellite pan comprises a feed source, a high-frequency head and the like, and compared with the satellite pan and the high-frequency heads which are connected, the satellite pan can save space and cost.
The satellite pan, i.e. the satellite antenna, is a metal paraboloid and is responsible for reflecting satellite signals to a feed source and a tuner located at the focus of the satellite antenna. The satellite pan is used for collecting weak signals transmitted by a satellite and concentrating the satellite signals to the focus of the satellite pan after the weak signals are reflected by the metal paraboloid. The satellite pan is usually provided with a feed source, which is a loudspeaker for converging a satellite signal and arranged at a focus of the satellite pan, and energy converged at the focus is collected completely for energy feeding.
The tuner LNB, i.e., a low noise down converter, has a function of amplifying and down-converting a satellite signal received by a satellite pan and output through a feed source into an intermediate frequency satellite signal, and transmitting the intermediate frequency satellite signal to a satellite receiver such as a set-top box through a coaxial cable. The tuner in the embodiment of the present invention may be a dual local oscillator tuner including two local oscillator frequencies, and may include a 22k switch therein, so as to select a high local oscillator or a low local oscillator according to an indication signal received from the power divider, thereby respectively reducing a satellite signal in a high frequency band or a low frequency band to an intermediate frequency signal that can be received by a satellite receiver such as a set-top box through a down conversion manner. The indication signal is a superimposed indication signal sent by satellite receivers such as different set top boxes through power dividers.
The first corresponding manner of the indication signal received by the 22k switch in the LNB and the high local oscillator and the low local oscillator may be: when the high-frequency head does not receive the 22K pulse signal, the high-frequency head selects a low local oscillator to receive the satellite signal through a 22K switch; when the high frequency head receives the 22k pulse signal, the high frequency head selects the high local oscillator to receive the satellite signal through the 22k switch. In accordance with IEC 61319 standard set by the International Electrotechnical Commission (IEC), the frequency range of the pulse signal that can be received by the 22k switch is 22kHz ± 4kHz, i.e., 18kHz to 26 kHz. Of course, the 22k switch specifically selects the high local oscillator or the low local oscillator by using which corresponding manner described above, and the embodiment of the present invention is not limited. The following embodiments of the present invention will be described by taking the first corresponding mode as an example.
The satellite power divider generally has two power divisions, four power divisions, six power divisions and the like, and can be used for dividing intermediate-frequency satellite signals output by the tuner into multiple paths and then respectively outputting the multiple paths of intermediate-frequency satellite signals to a set top box or other satellite receivers; or, the indication signals output by different set-top boxes or other satellite receivers are superposed, and the synthesized indication signals are output to the high-frequency head.
The set-top box is a satellite receiver for connecting a television and an external satellite signal, and can transmit the processed digital satellite signal to the television through an audio and video cable for display. The set top box can also receive satellite signals output by the LNB through a coaxial cable, and can also output indication signals to the LNB through the coaxial cable.
The set-top box may include portions of a main chip, memory, a modem, a return channel, a smart card interface, a video and audio output, and a receiving chip. The main chip demultiplexes and descrambles the received satellite signal through a Central Processing Unit (CPU), a video/audio decoder, a demultiplexer, and other modules, and then performs decoding, restoration, and other Processing through the video/audio decoder. The memory of the set-top box may be used to store programs and data. The receiving chip in the set-top box can be used for receiving the satellite signal output by the LNB and receiving a control signal of a set-top box remote controller, so that the set-top box is triggered to execute corresponding operation.
The following embodiments of the present invention will be described by taking as an example a high-band satellite signal having a Ku band frequency range of 11.55GHz to 12.75GHz, a low-band satellite signal having a frequency range of 10.7GHz to 11.9GHz, a high local oscillator having a frequency of 10.6GHz, and a low local oscillator having a frequency of 9.75 GHz.
The embodiment of the invention provides a control method of a satellite receiver system, wherein the satellite receiver system comprises the following steps: the system comprises a double-local-oscillator tuner, a 22k switch and a power divider, wherein the power divider is connected with two set top boxes; as shown in fig. 1, the method comprises the following steps:
step 101: when the two set top boxes indicate that the double local oscillator tuner selects the high local oscillator to receive the high frequency band satellite signal, a 22k switch is turned on, and the first set top box is controlled to send a first pulse signal to the double local oscillator tuner and lock the frequency;
step 102: and controlling the second set top box to send a second pulse signal to the double-local-oscillator tuner and try to lock the frequency, and closing the 22k switch when the second set top box fails to lock the frequency.
Here, when the two set top boxes indicate that the dual local oscillator tuner selects a high local oscillator to receive a high-frequency satellite signal, if the two set top boxes are operated at the same time, the 22K signal entering the LNB may have jitters and amplitude is reduced, which may cause the LNB not to recognize, and thus the two set top boxes may not operate normally; in the satellite receiving system of this embodiment, the first set top box may be operated first, it may be understood that the first set top box may be started normally, and then the second set top box is tried to operate, it may be understood that, if the second set top box can operate normally, the first set top box and the second set top box may operate simultaneously, otherwise, the first set top box and the second set top box may not operate simultaneously, at this time, only the first set top box may operate, and normal viewing of the first set top box may not be affected.
Optionally, in the long-term work of the inventor, the reason that the second set-top box cannot normally lock the frequency is found to include: the phases of the first pulse signal and the second pulse signal are different, and the amplitude of the signals becomes small and unstable after the 2 signals are superposed, so that the 22K electronic switch of the LNB cannot be identified.
In this embodiment, the method further includes the following steps: when receiving a command of closing the first set top box and confirming that the first set top box and the second set top box are both in working states, controlling the first set top box to be closed; and when the 22k switch is determined to be in a closed state and the frequency of the second set top box is unlocked, the 22k switch is opened, and the second set top box is controlled to send a second pulse signal to the double-local-oscillator tuner and lock the frequency. Here, it can be understood that, after the first set top box is turned off, if the 22k switch is also in the off state, the second set top box may lose the frequency lock, and at this time, the second set top box needs to be controlled to send the second pulse signal to the dual local oscillator tuner and lock the frequency.
In this embodiment, the method further includes the following steps: when receiving a command of closing the first set top box and confirming that the first set top box and the second set top box are both in working states, controlling the first set top box to be closed; and when the 22k switch is determined to be turned on, controlling a second set top box to send a second pulse signal to the double-local oscillator tuner and locking the frequency. Here, it can be understood that, after the first set top box is turned off, if the 22k switch is in the on state, the second set top box only needs to be controlled to send the second pulse signal to the dual local oscillator tuner and lock the frequency.
The second embodiment provides a satellite receiving system, which includes: the system comprises a double-local-oscillator tuner, a 22k switch and a power divider, wherein the power divider is connected with two set top boxes; the system also comprises the following modules:
the first detection module is used for turning on a 22k switch when the two set top boxes are determined to indicate that the double local oscillator tuner selects a high local oscillator to receive a high frequency band satellite signal, and controlling the first set top box to send a first pulse signal to the double local oscillator tuner and lock the frequency;
and the first processing module is used for controlling the second set top box to send a second pulse signal to the double-local-oscillator tuner and try to lock the frequency, and closing the 22k switch when the second set top box fails to lock the frequency.
In this embodiment, the following modules are further included: the second detection module is used for controlling the first set top box to be closed when receiving the instruction of closing the first set top box and confirming that the first set top box and the second set top box are both in the working state; and the second processing module is used for opening the 22k switch and controlling the second set top box to send a second pulse signal to the double-local-oscillator tuner and lock the frequency when the 22k switch is determined to be in the closed state and the frequency of the second set top box is unlocked.
In this embodiment, the following modules are further included: the third detection module is used for controlling the first set top box to be closed when receiving the instruction of closing the first set top box and confirming that the first set top box and the second set top box are both in the working state; and the third processing module is used for controlling a second set top box to send a second pulse signal to the double-local-oscillator tuner and lock the frequency when the 22k switch is determined to be turned on.
General description of the problems solved and the advantages achieved by the present invention, starting with the above, the problems solved here should be more than mentioned in the background and the advantages achieved should be more than mentioned in the object of the invention.
As will be clear to those skilled in the art, for convenience and brevity of description, the specific working processes of the system, the system and the module described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in this application, it should be understood that the disclosed system, and method may be implemented in other ways. For example, the system embodiments described above are merely illustrative, and for example, the division of the modules is merely a logical division, and in actual implementation, there may be another division, for example, multiple modules or components may be combined or integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, systems or modules, and may be in an electrical, mechanical or other form.
The modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical modules, may be located in one place, or may be distributed on a plurality of network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the embodiment.
In addition, each functional module in the embodiments of the present application may be integrated into one processing module, or each module may exist alone physically, or 2 or more modules may be integrated into one module. The integrated module can be realized in a hardware form, and can also be realized in a form of hardware and a software functional module.
The integrated module implemented in the form of a software functional module may be stored in a computer-readable storage medium. The software functional module is stored in a storage medium and includes several instructions for causing a computer system (which may be a personal computer, a server, or a network system) or a processor (processor) to execute some steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may be modified or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present application.
Claims (6)
1. A control method of a satellite receiving system, the satellite receiving system comprising: the system comprises a double-local-oscillator tuner, a 22k switch and a power divider, wherein the power divider is connected with two set top boxes; the method is characterized by comprising the following steps:
when the two set top boxes indicate that the double local oscillator tuner selects the high local oscillator to receive the high frequency band satellite signal, a 22k switch is turned on, and the first set top box is controlled to send a first pulse signal to the double local oscillator tuner and lock the frequency;
and controlling the second set top box to send a second pulse signal to the double-local-oscillator tuner and try to lock the frequency, and closing the 22k switch when the second set top box fails to lock the frequency.
2. The control method according to claim 1, characterized by further comprising the steps of:
when receiving a command of closing the first set top box and confirming that the first set top box and the second set top box are both in working states, controlling the first set top box to be closed;
and when the 22k switch is determined to be in a closed state and the frequency of the second set top box is unlocked, the 22k switch is opened, and the second set top box is controlled to send a second pulse signal to the double-local-oscillator tuner and lock the frequency.
3. The control method according to claim 1, characterized by further comprising the steps of:
when receiving a command of closing the first set top box and confirming that the first set top box and the second set top box are both in working states, controlling the first set top box to be closed;
and when the 22k switch is determined to be turned on, controlling a second set top box to send a second pulse signal to the double-local oscillator tuner and locking the frequency.
4. A satellite receiver system, the satellite receiver system comprising: the system comprises a double-local-oscillator tuner, a 22k switch and a power divider, wherein the power divider is connected with two set top boxes; the system is characterized by further comprising the following modules:
the first detection module is used for turning on a 22k switch when the two set top boxes are determined to indicate that the double local oscillator tuner selects a high local oscillator to receive a high frequency band satellite signal, and controlling the first set top box to send a first pulse signal to the double local oscillator tuner and lock the frequency;
and the first processing module is used for controlling the second set top box to send a second pulse signal to the double-local-oscillator tuner and try to lock the frequency, and closing the 22k switch when the second set top box fails to lock the frequency.
5. The satellite receiver system of claim 4, further comprising the following modules:
the second detection module is used for controlling the first set top box to be closed when receiving the instruction of closing the first set top box and confirming that the first set top box and the second set top box are both in the working state;
and the second processing module is used for opening the 22k switch and controlling the second set top box to send a second pulse signal to the double-local-oscillator tuner and lock the frequency when the 22k switch is determined to be in the closed state and the frequency of the second set top box is unlocked.
6. The satellite receiver system of claim 4, further comprising the following modules:
the third detection module is used for controlling the first set top box to be closed when receiving the instruction of closing the first set top box and confirming that the first set top box and the second set top box are both in the working state;
and the third processing module is used for controlling a second set top box to send a second pulse signal to the double-local-oscillator tuner and lock the frequency when the 22k switch is determined to be turned on.
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Effective date of registration: 20231207 Address after: 215600 No.188, South Ring Road, Tangqiao town, Zhangjiagang City, Suzhou City, Jiangsu Province Patentee after: JIANGSU YINHE ELECTRONICS Co.,Ltd. Address before: 215600 Jiangsu Yinhe Digital Technology Co., Ltd., 188 South Ring Road, Tangqiao town, Zhangjiagang City, Suzhou City, Jiangsu Province Patentee before: JIANGSU YINHE DIGITAL TECHNOLOGY CO.,LTD. |