CN111314753B - Signal processing method, digital video conversion device and low noise down converter - Google Patents

Signal processing method, digital video conversion device and low noise down converter Download PDF

Info

Publication number
CN111314753B
CN111314753B CN202010141628.9A CN202010141628A CN111314753B CN 111314753 B CN111314753 B CN 111314753B CN 202010141628 A CN202010141628 A CN 202010141628A CN 111314753 B CN111314753 B CN 111314753B
Authority
CN
China
Prior art keywords
signal
live broadcast
broadcast signal
down converter
low
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202010141628.9A
Other languages
Chinese (zh)
Other versions
CN111314753A (en
Inventor
莫英强
陈锦鹏
孙功宪
高峰
许祥滨
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Beidou Wanfang Information Technology Co ltd
Techtotop Microelectronics Co Ltd
Original Assignee
Shenzhen Beidou Wanfang Information Technology Co ltd
Techtotop Microelectronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen Beidou Wanfang Information Technology Co ltd, Techtotop Microelectronics Co Ltd filed Critical Shenzhen Beidou Wanfang Information Technology Co ltd
Publication of CN111314753A publication Critical patent/CN111314753A/en
Application granted granted Critical
Publication of CN111314753B publication Critical patent/CN111314753B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • 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]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/21—Server components or server architectures
    • H04N21/218—Source of audio or video content, e.g. local disk arrays
    • H04N21/2187—Live feed
    • 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
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
    • H04N21/4383—Accessing a communication channel
    • 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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/50—Tuning indicators; Automatic tuning control
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Databases & Information Systems (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)

Abstract

The embodiment of the application is applicable to the technical field of communication, and provides a signal processing method, digital video conversion equipment and a low-noise down converter, wherein the signal processing method comprises the following steps: receiving a positioning signal transmitted by a positioning satellite; determining whether the current position is positioned in a preset live broadcast signal receiving range according to the positioning signal; if yes, a signal control instruction is sent to the low-noise down converter, a first feed source of the low-noise down converter is instructed to receive and mix a first direct broadcast signal, a first intermediate frequency signal is output, a second feed source of the low-noise down converter is instructed to receive and mix a second direct broadcast signal, and a second intermediate frequency signal is output; the frequency ranges of the first intermediate frequency signal and the second intermediate frequency signal are respectively located in a preset live broadcast signal receiving frequency range. The embodiment can realize the supervision of the playable television programs in the partial area by carrying out signal processing on the digital video conversion equipment side.

Description

Signal processing method, digital video conversion device and low noise down converter
The present application claims priority from chinese patent application with application date 2019, 12, 27, 201911375026.3, entitled "signal processing method, digital video conversion device, and low noise down converter".
Technical Field
The application belongs to the technical field of communication, and particularly relates to a signal processing method, digital video conversion equipment and a low-noise down converter.
Background
The Low Noise Block (LNB), i.e. the tuner, has the function of amplifying and down-converting the satellite signal transmitted by the feed source, and converting the high frequency signal to an intermediate frequency, so as to facilitate the transmission of the coaxial cable and the demodulation and operation of the satellite receiver.
In certain special areas, regulatory authorities need to limit the area where television programs fall to prevent some unauthorized television programs from being broadcast in that area. However, due to the broadcasting and open characteristics of satellite television signals, the technical difficulty and cost of monitoring television programs in a certain area at a satellite end are high.
Disclosure of Invention
In view of this, the embodiments of the present application provide a signal processing method, a digital video conversion device, and a low noise down converter, so as to solve the problem in the prior art that it is difficult to monitor a television program in a partial area.
A first aspect of an embodiment of the present application provides a signal processing method, applied to a digital video conversion device, including:
receiving a positioning signal transmitted by a positioning satellite;
determining whether the current position is positioned in a preset live broadcast signal receiving range according to the positioning signal;
if the current position is in the live broadcast signal receiving range, a signal control instruction is sent to a low-noise down converter electrically connected with the digital video conversion equipment, wherein the signal control instruction is used for instructing a first feed source of the low-noise down converter to receive a first live broadcast signal and mix the first live broadcast signal, outputting a first intermediate frequency signal, and instructing a second feed source of the low-noise down converter to receive a second live broadcast signal and mix the second live broadcast signal and output a second intermediate frequency signal;
the frequency band of the first intermediate frequency signal and the frequency band of the second intermediate frequency signal are respectively located in a preset direct broadcast signal receiving frequency band range.
A second aspect of the embodiments of the present application provides a signal processing method, applied to a low noise down converter, including:
receiving a signal control instruction sent by digital video conversion equipment electrically connected with the low-noise down converter, wherein the signal control instruction is generated by the digital video conversion equipment when the current position is judged to be positioned in a preset live broadcast signal receiving range;
aiming at the signal control instruction, a first feed source of the low-noise down converter is controlled to receive a first direct-broadcasting signal, the first direct-broadcasting signal is mixed, and a first intermediate frequency signal is output;
controlling a second feed source of the low-noise down converter to receive a second live broadcast signal, mixing the second live broadcast signal, and outputting a second intermediate frequency signal;
the frequency band of the first intermediate frequency signal and the frequency band of the second intermediate frequency signal are respectively located in a preset direct broadcast signal receiving frequency band range.
A third aspect of the embodiments of the present application provides a signal processing apparatus applied to a digital video conversion device, the signal processing apparatus including:
the receiving module is used for receiving the positioning signals transmitted by the positioning satellites;
the determining module is used for determining whether the current position is positioned in a preset live broadcast signal receiving range according to the positioning signal;
the indication module is used for sending a signal control instruction to a low-noise down-converter electrically connected with the digital video conversion equipment if the current position is in the live broadcast signal receiving range, wherein the signal control instruction is used for indicating a first feed source of the low-noise down-converter to receive a first direct broadcast signal and mix the first direct broadcast signal, outputting a first intermediate frequency signal, and indicating a second feed source of the low-noise down-converter to receive a second live broadcast signal and mix the second live broadcast signal and output a second intermediate frequency signal;
the frequency band of the first intermediate frequency signal and the frequency band of the second intermediate frequency signal are respectively located in a preset live broadcast signal receiving frequency band.
A fourth aspect of the embodiments of the present application provides a signal processing apparatus applied to a low noise down converter, the signal processing apparatus including:
the receiving module is used for receiving a signal control instruction sent by digital video conversion equipment electrically connected with the low-noise down converter, wherein the signal control instruction is generated by the digital video conversion equipment when the current position is judged to be positioned in a preset live broadcast signal receiving range;
the first control module is used for controlling a first feed source of the low-noise down converter to receive a first direct-broadcasting signal aiming at the signal control instruction, mixing the first direct-broadcasting signal and outputting a first intermediate-frequency signal;
the second control module is used for controlling a second feed source of the low-noise down converter to receive a second live broadcast signal, mixing the second live broadcast signal and outputting a second intermediate frequency signal;
the frequency band of the first intermediate frequency signal and the frequency band of the second intermediate frequency signal are respectively located in a preset direct broadcast signal receiving frequency band range.
A fifth aspect of the embodiments of the present application provides a digital video conversion apparatus, which implements the signal processing method according to the first aspect described above when the digital video conversion apparatus is powered on.
A sixth aspect of the embodiments of the present application provides a low-noise down converter, where the low-noise down converter includes at least a first feed source and a second feed source, and the low-noise down converter implements the signal processing method described in the second aspect when the low-noise down converter is powered on.
Compared with the prior art, the embodiment of the application has the following advantages:
according to the embodiment of the application, the positioning signals transmitted by the positioning satellites are received, whether the current position is located in the preset live broadcast signal receiving range is determined according to the positioning signals, a signal control instruction is sent to the low-noise down converter only when the current position is located in the live broadcast signal receiving range, a plurality of feeds of the low-noise down converter are instructed to respectively receive live broadcast signals transmitted by different live broadcast satellites, and intermediate frequency signals in the corresponding live broadcast signal receiving frequency range are obtained through mixing the live broadcast signals. The embodiment identifies the current position by receiving the positioning signals transmitted by the positioning satellites, solves the problem that part of unauthorized areas can randomly receive live television signals, ensures that television programs can only be broadcast in authorized areas in a landing mode, and reduces the supervision difficulty of a supervision mechanism on the areas where the television programs can be in the landing mode.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings that are required to be used in the embodiments or the description of the prior art. It is apparent that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a flow chart illustrating steps of a signal processing method according to an embodiment of the present application;
FIG. 2 is a flow chart illustrating steps of another signal processing method according to one embodiment of the present application;
fig. 3 is a schematic diagram of a power supply principle of the digital video conversion device according to an embodiment of the present application when the digital video conversion device is powered on;
fig. 4 is a schematic application scenario diagram of a signal processing method according to an embodiment of the present application;
fig. 5 is a schematic diagram of a power supply principle of a digital video conversion device according to an embodiment of the present application, where the digital video conversion device is located in a live signal receiving range;
fig. 6 is a schematic diagram of a power supply principle of the digital video conversion device according to an embodiment of the present application, which is not in a live signal receiving range;
FIG. 7 is a flow chart illustrating steps of yet another signal processing method according to an embodiment of the present application;
FIG. 8 is a schematic diagram illustrating frequency division of an intermediate frequency signal according to an embodiment of the present application;
FIG. 9 is a schematic overall architecture of a signal processing method according to one embodiment of the present application;
FIG. 10 is a schematic diagram of a signal processing apparatus according to one embodiment of the present application;
fig. 11 is a schematic diagram of another signal processing device according to an embodiment of the present application.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system configurations, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
The technical scheme of the present application is described below by specific examples.
Referring to fig. 1, a schematic step flow diagram of a signal processing method according to an embodiment of the present application is shown, which may specifically include the following steps:
s101, receiving a positioning signal transmitted by a positioning satellite;
it should be noted that the method can be applied to a digital video conversion device (Set Top Box, STB). That is, the execution subject of the present embodiment is a digital video conversion apparatus.
A digital video conversion device, commonly referred to as a set-top box or set-top box, is a device that connects a television to an external signal source. It can convert the compressed signal into television content and display it on a television set. The signals processed by the set-top box may come from cable, satellite antenna, broadband network, terrestrial broadcast, etc.
In this embodiment, the set-top box may receive the live broadcast signal transmitted by the live broadcast satellite through the tuner connected thereto, and then convert the live broadcast signal into television content for broadcasting on the television.
In order to achieve proper management of television program content in the sub-areas, so that unauthorized television program content cannot be broadcast in the managed area, the present embodiment may first determine whether the current area belongs to the managed area when the signal for transmitting television program content is preprocessed by the set-top box.
In a specific implementation, the set top box and the positioning device can be connected, the positioning device receives the positioning signal transmitted by the positioning satellite, and then judges whether the set top box at the current position needs to process the received television program signal according to the positioning signal.
It should be noted that, since the set top box needs to be connected with the tuner to receive the live broadcast signal transmitted by the live broadcast satellite, the positioning device and the tuner can be integrated together, so that the tuner can receive the positioning signal transmitted by the positioning satellite through the integrated positioning function and transmit the positioning signal to the set top box for processing. Of course, the positioning device may also exist alone, which is not limited in this embodiment.
S102, determining whether the current position is located in a preset live broadcast signal receiving range according to the positioning signal;
after receiving the positioning signal, the current position of the set top box can be determined by decoding the positioning signal, so that whether the position is in a range capable of receiving the television live broadcast signal is judged.
If the current position is within the range capable of receiving the live television signal, the set top box can execute S103 to send a corresponding control instruction to the tuner to instruct the tuner to receive the live television signal transmitted by the live television satellite.
S103, a signal control instruction is sent to a low-noise down converter electrically connected with the digital video conversion equipment, the signal control instruction is used for instructing a first feed source of the low-noise down converter to receive a first direct broadcast signal and mix the first direct broadcast signal, outputting a first intermediate frequency signal, and instructing a second feed source of the low-noise down converter to receive a second direct broadcast signal and mix the second direct broadcast signal, and outputting a second intermediate frequency signal.
In general, in order to fully utilize limited bandwidth resources, a repeater transmits two beams simultaneously, and the two beams are mutually perpendicular to each other and are not mutually interfered. The mutual vertical propagation modes can be divided into linear polarization (vertical and horizontal propagation) and circular polarization (left-handed and right-handed propagation), and the frequency bands are 10.7GHz to 12.75GHz, and the bandwidth is 2.05GHz. Therefore, the bandwidth of one direct broadcast satellite is 4.1GHz in total, and the bandwidth of the two direct broadcast satellites is 8.2GHz in total, regardless of the linear polarization or circular polarization propagation mode. The intermediate frequency band (namely the output frequency band of the tuner) received by the set top box is 950MHz to 2150MHz, the bandwidth is only 1.2GHz, and the 8.2GHz bandwidth received by the tuner is far greater than the 1.2GHz bandwidth receivable by the set top box.
Therefore, in order to enable the two feed sources of the tuner to simultaneously receive the live broadcast signals transmitted by the two live broadcast satellites, the live broadcast signals respectively received by the two feed sources are required to be mixed with different local oscillators to obtain different intermediate frequencies, and the received intermediate frequencies must fall into the receivable frequency band of the set top box.
In this embodiment, the frequency band received by the tuner may be switched by the set-top box sending different signal control instructions. The signal control command may be a command based on the digital satellite television receiver control protocol diseqc1.1, as well as a command generated based on different voltage or pulse signals.
In a specific implementation, the diseqc1.1 instruction sent by the set top box may be used to instruct the first feed source of the tuner to receive and mix the first direct-broadcast signal, and output a first intermediate frequency signal, where the first direct-broadcast signal may be a signal transmitted by the first direct-broadcast satellite.
On the other hand, the instruction generated based on different voltages or pulse signals may be used to instruct the second feed source of the tuner to receive and mix the second live broadcast signal, and output the second intermediate frequency signal, where the second live broadcast signal may be a signal transmitted through the second live broadcast satellite, and the first live broadcast satellite and the second live broadcast satellite are different live broadcast satellites.
It should be noted that, when the two feeds of the tuner mix the first direct broadcast signal and the second direct broadcast signal, specific parameter sizes may be selected according to actual needs, so long as the frequency bands of the first intermediate frequency signal and the second intermediate frequency signal output by mixing are both ensured to be within the range of the preset direct broadcast signal receiving frequency band, that is, 950MHz to 2150MHz, and the frequency bands of the first intermediate frequency signal and the second intermediate frequency signal are not overlapped with each other.
It should be noted that, the above examples are described only by taking the first feed source and the second feed source as examples, and those skilled in the art should understand that, when signal processing is performed according to the technical solution provided in this embodiment, the tuner may also include more feed sources, for example, the third feed source, the fourth feed source, and the like, and the number of feed sources of the tuner is not limited in this embodiment.
In the embodiment of the application, by receiving the positioning signal transmitted by the positioning satellite and determining whether the current position is located in the preset live broadcast signal receiving range according to the positioning signal, only when the current position is located in the live broadcast signal receiving range, a signal control instruction is sent to the low-noise down-converter to instruct a plurality of feeds of the low-noise down-converter to respectively receive live broadcast signals transmitted by different live broadcast satellites, and intermediate frequency signals in the corresponding live broadcast signal receiving frequency range are obtained by mixing the live broadcast signals. The embodiment identifies the current position by receiving the positioning signals transmitted by the positioning satellites, solves the problem that part of unauthorized areas can randomly receive live television signals, ensures that television programs can only be broadcast in authorized areas in a landing mode, and reduces the supervision difficulty of a supervision mechanism on the areas where the television programs can be in the landing mode.
Referring to fig. 2, a schematic step flow diagram of another signal processing method according to an embodiment of the present application is shown, which may specifically include the following steps:
s201, when the digital video conversion equipment is powered on, controlling a positioning equipment electrically connected with the digital video conversion equipment to be powered on and work, and controlling the low-noise down converter to keep a power-off state;
it should be noted that the method can be applied to the digital video conversion device STB. Namely, the execution main body of the embodiment is the STB, and the television program signal transmitted by the direct broadcast satellite can only be received in the allowable receiving range through the processing of the STB, so that the television program can only be broadcasted in the authorized area.
As shown in fig. 3, the power supply principle of the STB when the STB is powered on is schematically shown. According to the power supply principle shown in fig. 3, when the STB is turned on, the default positioning device GNSS unit is powered on and the tuner LNB unit is powered off and not operated.
S202, receiving a positioning signal transmitted by a positioning satellite;
after the GNSS unit is electrified, the GNSS unit can receive positioning signals transmitted by positioning satellites through an antenna of the GNSS unit, and the positioning signals are amplified by a low noise amplifier LNA and filtered by a filter, then are output through a combined female F connector, and finally are transmitted to the STB through a coaxial cable to be further processed by the STB.
Fig. 4 is a schematic view of an application scenario of the signal processing method of the present application. The set-top box in fig. 4 may be electrically connected to a tuner, in which a GNSS unit (not shown) may be integrated, through which positioning signals of positioning satellites are received and transmitted to the set-top box.
S203, decoding the positioning signal to obtain position information corresponding to the positioning signal;
the processing of the received positioning signal by the STB may include decoding the positioning signal to obtain location information corresponding to the positioning signal. This location information is the information of the current location of the STB.
S204, if the preset electronic fence information contains the position information, controlling the low-noise down converter to be powered on and work, and controlling the positioning equipment to be powered off;
in order to ensure that television programs transmitted through a direct broadcast satellite can only be broadcast in an authorized area, after the STB decodes and obtains current position information, whether the position is located in a direct broadcast signal receiving range can be judged first.
In this embodiment, an electronic fence may be preset in the STB for storing location information of those areas where live signals are allowed to be received. If the electronic fence is judged to contain the position information of the current STB, the current position can be judged to be located in the live broadcast signal receiving range; otherwise, it may be determined that the current location is not within the live signal reception range.
Referring to fig. 5 and 6, schematic diagrams of power supply principles of the STB in two cases of being in the live signal receiving range and not being in the live signal receiving range are shown respectively. As shown in fig. 5, when the STB is located in the live signal receiving range, the STB may power down the GNSS unit by an instruction and turn on the power of the LNB unit, so that the LNB unit starts to operate, i.e. starts to receive live signals of a plurality of live satellites as shown in fig. 4 through the LNB unit.
Of course, if the current position is not in the live signal receiving range, the STB may keep the GNSS unit in an energized state, and continue to collect the positioning signal. Because the current position is not in the live broadcast signal receiving range, the live broadcast signal transmitted by the live broadcast satellite does not need to be received through the LNB unit, and the LNB unit can be kept in a power-off non-working state.
S205, a signal control instruction is sent to the low-noise down-converter, and the signal control instruction is used for instructing a first feed source of the low-noise down-converter to receive a first direct broadcast signal and mix the first direct broadcast signal, outputting a first intermediate frequency signal, and instructing a second feed source of the low-noise down-converter to receive a second direct broadcast signal and mix the second direct broadcast signal, and outputting a second intermediate frequency signal.
In this embodiment, if the current position is located in the live signal receiving range, the frequency band received by the LNB may be switched by the STB sending different signal control instructions.
For example, a diseqc1.1 instruction, which may be sent by the STB, may be used to instruct the first feed of the LNB to receive and mix the first direct broadcast signal, outputting the first intermediate frequency signal. Then, based on different voltage or pulse signal generation instructions, a second feed source of the LNB is instructed to receive a second live broadcast signal, and a second intermediate frequency signal is output.
It should be noted that, when mixing the first direct broadcast signal and the second direct broadcast signal, it is required to ensure that the frequency band of the first intermediate frequency signal and the frequency band of the second intermediate frequency signal output after mixing are both located in the preset direct broadcast signal receiving frequency band range, that is, in the range from 950MHz to 2150MHz, and the frequency bands are not overlapped with each other.
In the embodiment of the application, whether the current position is located in the preset live broadcast signal receiving range is identified by receiving the positioning signal transmitted by the positioning satellite, so that the problem that part of unauthorized areas can randomly receive the live television signals is solved, and the condition that television programs can only be broadcast in an authorized area in a landing manner is ensured; meanwhile, different live broadcast signals are mixed through the two feed sources of the tuner, and the intermediate frequency signals obtained after mixing can be ensured to be positioned in the range of a preset live broadcast signal receiving frequency band and not overlapped, so that a plurality of feed sources of the tuner can work simultaneously and are not interfered with each other.
Referring to fig. 7, a schematic step flow diagram of still another signal processing method according to an embodiment of the present application is shown, which may specifically include the following steps:
s701, receiving a signal control instruction sent by digital video conversion equipment electrically connected with the low-noise down converter, wherein the signal control instruction is generated by the digital video conversion equipment when the current position is judged to be positioned in a preset live broadcast signal receiving range;
it should be noted that the method can be applied to a low noise down converter LNB. That is, the execution body of the embodiment is an LNB, and by receiving a control instruction sent by the STB, the LNB can mix different received satellite signals, so as to output an intermediate frequency signal meeting the requirement of the corresponding receiving frequency band.
In this embodiment, the signal control instruction received by the LNB and sent by the STB may be generated when the STB determines that the current position is within a preset live signal receiving range. The signal control command may be a command based on the digital satellite television receiver control protocol diseqc1.1, as well as a command generated based on different voltage or pulse signals.
S702, aiming at the signal control instruction, controlling a first feed source of the low-noise down converter to receive a first direct-broadcasting signal, mixing the first direct-broadcasting signal and outputting a first intermediate-frequency signal;
in this embodiment, after receiving a control instruction sent by the STB, the LNB may control, according to the instruction of the instruction, different feeds to receive live broadcast signals transmitted by different live broadcast satellites, and mix the live broadcast signals, and output corresponding intermediate frequency signals.
In this embodiment, the LNB may include a plurality of local oscillation units, and for different control instructions and different received live signals, one or a plurality of local oscillation units may be used to mix respectively.
In a specific implementation, when the LNB receives a control instruction sent by the STB, the type of the signal control instruction may be first identified, and a first target live broadcast signal and a first target local oscillator unit corresponding to the type may be determined. I.e. to determine what live signals are received and with which local oscillator unit or units to mix.
After the first target live broadcast signal and the first target local oscillator unit are determined, the LNB can control the first feed source to receive the first target live broadcast signal, and the first target live broadcast signal is mixed by the first target local oscillator unit to output a first intermediate frequency signal. The first target live signal may include a first vertical signal or a first horizontal signal of a first direct broadcast signal.
In general, a diseqc1.1 based instruction may include 8 instructions S1-S8. Thus, as an example, if the signal control instruction is the first instruction S1, the LNB may control the first feed source to receive the first vertical signal transmitted by the first direct broadcast satellite, and control the first local oscillator unit LO1 to mix the first vertical signal to obtain the first intermediate frequency signal;
if the signal control instruction is a second instruction S2, the LNB can control the first feed source to receive a first vertical signal transmitted by the first direct broadcast satellite and control the second local oscillation unit LO2 to mix the first vertical signal to obtain a first intermediate frequency signal;
if the signal control instruction is a third instruction S3, the LNB may control the first feed source to receive a first vertical signal transmitted by the first direct broadcast satellite, and control the third local oscillator unit LO3 to mix the first vertical signal to obtain a first intermediate frequency signal;
if the signal control instruction is a fourth instruction S4, the LNB may control the first feed source to receive a first vertical signal transmitted by the first direct broadcast satellite, and control the fourth local oscillation unit LO4 to mix the first vertical signal to obtain a first intermediate frequency signal;
if the signal control instruction is a fifth instruction S5, the LNB may control the first feed source to receive a first horizontal signal transmitted by the first direct broadcast satellite, and control the first local oscillator unit LO1 to mix the first horizontal signal to obtain a first intermediate frequency signal;
if the signal control instruction is a sixth instruction S6, the LNB may control the first feed source to receive a first horizontal signal transmitted by the first direct broadcast satellite, and control the second local oscillator unit LO2 to mix the first horizontal signal to obtain a first intermediate frequency signal;
if the signal control instruction is a seventh instruction S7, the LNB may control the first feed source to receive a first horizontal signal transmitted by the first direct broadcast satellite, and control the third local oscillator unit LO3 to mix the first horizontal signal to obtain a first intermediate frequency signal;
if the signal control instruction is the eighth instruction S8, the LNB may control the first feed source to receive the first horizontal signal transmitted by the first direct broadcast satellite, and control the fourth local oscillator unit LO4 to mix the first horizontal signal, so as to obtain a first intermediate frequency signal.
S703, controlling a second feed source of the low-noise down converter to receive a second live broadcast signal, mixing the second live broadcast signal, and outputting a second intermediate frequency signal.
In this embodiment, the control instruction for the second feed source may be an instruction generated based on a different voltage or pulse signal.
In a specific implementation, a voltage value and a pulse signal which are currently output by the STB can be detected, and a second target live broadcast signal corresponding to the voltage value and a second target local oscillator unit corresponding to the pulse signal are determined; and then controlling a second feed source to receive the second target live broadcast signal, adopting a second target local oscillator unit to mix the second target live broadcast signal, and outputting a second intermediate frequency signal. The second target live signal may also comprise a second vertical signal or a second horizontal signal of the second live signal, similar to the first target live signal.
For example, when the voltage output by the STB is detected to be the first voltage, the LNB may control the second feed source to receive the second horizontal signal transmitted by the second direct broadcast satellite, and control the fifth local oscillator unit LO5 or the sixth local oscillator unit LO6 to mix the second horizontal signal, so as to obtain the second intermediate frequency signal.
When the voltage output by the STB is detected to be the second voltage, the LNB can control the second feed source to receive the second vertical signal transmitted by the second direct broadcast satellite, and control the fifth local oscillation unit LO5 or the sixth local oscillation unit LO6 to mix the second vertical signal, so as to obtain a second intermediate frequency signal.
The first voltage may have a voltage value of 13 volts (V), and the second voltage may have a voltage value of 18V; correspondingly, the fifth local oscillation unit LO5 and the sixth local oscillation unit LO6 can be controlled by pulse signals of 0/22 KHz.
As shown in table one, an example of the correspondence between a signal control command and different frequency bands received by the LNB in this embodiment is shown.
Table one:
signal control instruction sent by STB Different-state frequency band received by LNB
S1 The first feed source receives the vertical signal transmitted by the satellite and LO1 works
S2 The first feed source receives the vertical signal transmitted by the satellite and LO2 works
S3 The first feed source receives the vertical signal transmitted by the satellite and LO3 works
S4 The first feed source receives the vertical signal transmitted by the satellite and LO4 works
S5 The first feed source receives the horizontal signal transmitted by the satellite and LO1 works
S6 The first feed source receives the horizontal signal transmitted by the satellite and LO2 works
S7 The first feed source receives the horizontal signal transmitted by the satellite and LO3 works
S8 First feedHorizontal signal transmitted by source receiving satellite and LO4 operation
13V The second feed source receives the horizontal signal emitted by the satellite
18V The second feed source receives the vertical signal transmitted by the satellite
0KHz LO5 operation of the second feed
22KHz LO6 operation of the second feed
The frequency band of the first intermediate frequency signal and the frequency band of the second intermediate frequency signal obtained after mixing are respectively located in a preset direct broadcast signal receiving frequency band range.
Fig. 8 is a schematic diagram of frequency division of an intermediate frequency signal according to the present embodiment. After each local oscillator unit is controlled to carry out frequency mixing according to the method, the frequency band of the obtained first intermediate frequency signal and the frequency band of the second intermediate frequency signal are both in the range of 950MHz to 2150MHz, which are the receiving frequency band of the live signal, and the frequency band are not overlapped with each other.
In the embodiment of the application, by receiving different control instructions sent by the STB, a plurality of feeds of the LNB can be switched to respectively receive different satellite signals and mix the satellite signals, frequency bands of intermediate frequency signals obtained after mixing are all located in the direct broadcast signal receiving frequency band range of the STB and are not overlapped, and the plurality of feeds of the LNB can work simultaneously and are not interfered with each other.
For ease of understanding, the signal processing method of the present application will be described below with reference to a specific example.
Fig. 9 is a schematic diagram of the overall architecture of a signal processing method according to the present embodiment. According to the architecture shown in fig. 9, the signal processing method of the present application may include the following procedures:
1. the STB is powered on, at which time the default positioning unit GNSS (not shown) is powered on simultaneously, while the LNB is powered off and not. The GNSS receives the positioning signals transmitted by the positioning satellites through the antennas of the GNSS, processes the positioning signals and transmits the processed positioning signals to the STB for recognition.
2. The STB obtains the current position information by decoding the positioning signal, compares the position information with the electronic fence information preset in the STB, and judges whether the current position is in the allowable receiving range of the television live broadcast signal. If the current position is in the allowable receiving range, the STB transmits a DiSEqC1.1LNB power-on signal to allow the LNB unit to work in a power-on mode, and the GNSS unit synchronously performs power-off non-work processing; if the STB is outside the acceptable reception range, a DiSEqC1.1 GNSS unit power-on signal is maintained by the STB, the GNSS unit remains in a powered-on state, and the LNB unit remains in a powered-off state.
3. When the current position is in the allowable receiving range, the STB sends a DiSEqC1.1 control instruction to the LNB unit which is electrified to work, two feed sources LNB_A and LNB_B of the LNB are indicated to respectively receive live broadcast signals transmitted by different satellites, different local oscillation units are adopted for mixing, and intermediate frequency signals in the range of the receivable frequency band of the STB are output. Specifically, the LNB_A controls to switch to receive different frequency bands through different DiSEqC1.1 instructions sent by the STB; and LNB_B sends 13V and 18V voltage and 0K and 22KHz pulse signals through STB to control switching and receiving of different frequency bands. The voltage of 13V or 18V (2 is selected 1), the pulse signal of 0KHz or 22KHz (2 is selected 1), and the different DiSEqC1.1 instruction signals (multi-selected 1) are respectively switched without mutual influence.
The diseqc1.1 control instruction codes (16 system) are shown in table two below.
And (II) table:
GNSS unit power on E0 10 02
LNB unit power on E0 10 03
S1 E0 10 39F0
S2 E0 10 39F1
S3 E0 10 39F2
S4 E0 10 39F3
S5 E0 10 39F5
S6 E0 10 39F6
S7 E0 10 39F7
S8 E0 10 39F8
It should be noted that, the sequence number of each step in the above embodiment does not mean the sequence of execution sequence, and the execution sequence of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application. In addition, the foregoing embodiments have emphasis on each, and related details may be referred to each other.
Referring to fig. 10, a schematic diagram of a signal processing apparatus according to an embodiment of the present application is shown, where the signal processing apparatus may be applied to a digital video conversion device STB, and may specifically include the following modules:
a receiving module 1001, configured to receive a positioning signal transmitted by a positioning satellite;
a determining module 1002, configured to determine whether the current position is located in a preset live broadcast signal receiving range according to the positioning signal;
an indication module 1003, configured to send a signal control instruction to a low-noise down-converter electrically connected to the digital video conversion device if the current position is in the live signal receiving range, where the signal control instruction is configured to instruct a first feed source of the low-noise down-converter to receive a first direct-broadcast signal and mix the first direct-broadcast signal, output a first intermediate frequency signal, and instruct a second feed source of the low-noise down-converter to receive a second live signal and mix the second live signal, and output a second intermediate frequency signal;
the frequency band of the first intermediate frequency signal and the frequency band of the second intermediate frequency signal are respectively located in a preset live broadcast signal receiving frequency band.
In an embodiment of the present application, the signal processing apparatus may further include the following modules:
and the power-on state control module is used for controlling the positioning equipment electrically connected with the digital video conversion equipment to work in a power-on mode when the digital video conversion equipment is powered on and controlling the low-noise down converter to keep a power-off state.
In this embodiment of the present application, the determining module 1002 may specifically include the following sub-modules:
the positioning signal decoding submodule is used for decoding the positioning signal to obtain position information corresponding to the positioning signal;
the position information judging sub-module is used for judging that the current position is positioned in the live broadcast signal receiving range if the preset electronic fence information contains the position information; otherwise, judging that the current position is not in the live broadcast signal receiving range.
In this embodiment of the present application, the power-on state control module is further configured to control the low-noise down converter to power on and control the positioning device to power off if the current position is located in the live signal receiving range;
the indication module 1003 may specifically include the following sub-modules:
and the instruction sending submodule is used for sending a signal control instruction to the low-noise down converter.
Referring to fig. 11, a schematic diagram of another signal processing apparatus according to an embodiment of the present application is shown, where the signal processing apparatus may be applied to a low noise down converter LNB, and may specifically include the following modules:
a receiving module 1101, configured to receive a signal control instruction sent by a digital video conversion device electrically connected to the low noise down converter, where the signal control instruction is generated by the digital video conversion device when determining that a current position is located in a preset live signal receiving range;
the first control module 1102 is configured to control, for the signal control instruction, the first feed source of the low noise down converter to receive a first direct-broadcast signal, mix the first direct-broadcast signal, and output a first intermediate frequency signal;
a second control module 1103, configured to control a second feed of the low-noise down-converter to receive a second live signal, mix the second live signal, and output a second intermediate frequency signal;
the frequency band of the first intermediate frequency signal and the frequency band of the second intermediate frequency signal are respectively located in a preset direct broadcast signal receiving frequency band range.
In this embodiment of the present application, the low noise down converter may include a plurality of local oscillation units, and the first control module 1102 may specifically include the following sub-modules:
the identification sub-module is used for identifying the type of the signal control instruction;
a first determining submodule, configured to determine a first target live signal and a first target local oscillator unit corresponding to the type, where the first target live signal includes a first vertical signal or a first horizontal signal of the first direct broadcast signal;
and the first control submodule is used for controlling the first feed source to receive the first target live broadcast signal, adopting the first target local oscillator unit to mix the first target live broadcast signal and outputting a first intermediate frequency signal.
In this embodiment of the present application, the second control module 1103 may specifically include the following sub-modules:
the detection submodule is used for detecting the voltage value and the pulse signal which are currently output by the digital video conversion equipment;
a second determining submodule, configured to determine a second target live broadcast signal corresponding to the voltage value and a second target local oscillator unit corresponding to the pulse signal, where the second target live broadcast signal includes a second vertical signal or a second horizontal signal of the second live broadcast signal;
and the second control submodule is used for controlling the second feed source to receive the second target live broadcast signal, adopting the second target local oscillator unit to mix the second target live broadcast signal and outputting a second intermediate frequency signal.
For the device embodiments, since they are substantially similar to the method embodiments, the description is relatively simple, and reference should be made to the description of the method embodiments.
The application also discloses digital video conversion equipment, and the signal processing method of the digital video conversion equipment side in the embodiment can be realized when the digital video conversion equipment is electrified to work.
The application also discloses a low-noise down converter, which at least comprises a first feed source and a second feed source, and the signal processing method of the low-noise down converter side in the previous embodiment can be realized when the digital video conversion equipment is electrified and works.
The above embodiments are only for illustrating the technical solution of the present application, and are not limiting. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.

Claims (8)

1. A signal processing method, characterized by being applied to a digital video conversion apparatus in which an electronic fence is preset, the electronic fence storing therein position information of an area that is allowed to receive a live signal, the signal processing method comprising:
when the digital video conversion equipment is electrified, controlling a positioning equipment electrically connected with the digital video conversion equipment to be electrified and work, and controlling a low-noise down converter electrically connected with the digital video conversion equipment to be kept in a power-off state;
receiving a positioning signal transmitted by a positioning satellite;
determining whether the current position is positioned in a preset live broadcast signal receiving range according to the positioning signal;
if the current position is in the live broadcast signal receiving range, controlling the low-noise down converter to be electrified and work, controlling the positioning equipment to be powered off, and sending a signal control instruction to the low-noise down converter, wherein the signal control instruction is used for indicating a first feed source of the low-noise down converter to receive a first live broadcast signal and mix the first live broadcast signal and output a first intermediate frequency signal, and indicating a second feed source of the low-noise down converter to receive a second live broadcast signal and mix the second live broadcast signal and output a second intermediate frequency signal;
the frequency band of the first intermediate frequency signal and the frequency band of the second intermediate frequency signal are respectively located in a preset direct broadcast signal receiving frequency band range.
2. The method of claim 1, wherein determining whether the current location is within a preset live signal reception range based on the positioning signal comprises:
decoding the positioning signal to obtain position information corresponding to the positioning signal;
if the preset electronic fence information contains the position information, judging that the current position is positioned in the live broadcast signal receiving range;
otherwise, judging that the current position is not in the live broadcast signal receiving range.
3. A signal processing method for use in a low noise down converter, the signal processing method comprising:
receiving a signal control instruction sent by digital video conversion equipment electrically connected with the low-noise down-converter, wherein the signal control instruction is generated by the digital video conversion equipment when the current position is judged to be positioned in a preset live broadcast signal receiving range, an electronic fence is preset in the digital video conversion equipment, and position information of an area allowing receiving live broadcast signals is stored in the electronic fence; when the digital video conversion equipment is electrified, the positioning equipment electrically connected with the digital video conversion equipment is electrified to work, and the low-noise down converter electrically connected with the digital video conversion equipment is kept in an outage state; when the current position is in the live broadcast signal receiving range, the low-noise down converter is powered on to work, and the positioning equipment is powered off;
aiming at the signal control instruction, a first feed source of the low-noise down converter is controlled to receive a first direct-broadcasting signal, the first direct-broadcasting signal is mixed, and a first intermediate frequency signal is output;
controlling a second feed source of the low-noise down converter to receive a second live broadcast signal, mixing the second live broadcast signal, and outputting a second intermediate frequency signal;
the frequency band of the first intermediate frequency signal and the frequency band of the second intermediate frequency signal are respectively located in a preset direct broadcast signal receiving frequency band range.
4. A method according to claim 3, wherein the low noise down converter comprises a plurality of local oscillator units, and wherein for the signal control instructions, controlling a first feed of the low noise down converter to receive a first direct broadcast signal and mix the first direct broadcast signal, outputting a first intermediate frequency signal comprises:
identifying the type of the signal control instruction;
determining a first target live broadcast signal and a first target local oscillator unit corresponding to the type, wherein the first target live broadcast signal comprises a first vertical signal or a first horizontal signal of the first live broadcast signal;
and controlling the first feed source to receive the first target live broadcast signal, mixing the first target live broadcast signal by adopting the first target local oscillator unit, and outputting a first intermediate frequency signal.
5. The method of claim 4, wherein the controlling the second feed of the low noise down converter to receive a second live signal and mix the second live signal to output a second intermediate frequency signal comprises:
detecting a voltage value and a pulse signal which are currently output by the digital video conversion equipment;
determining a second target live broadcast signal corresponding to the voltage value and a second target local oscillator unit corresponding to the pulse signal, wherein the second target live broadcast signal comprises a second vertical signal or a second horizontal signal of the second live broadcast signal;
and controlling the second feed source to receive the second target live broadcast signal, mixing the second target live broadcast signal by adopting the second target local oscillator unit, and outputting a second intermediate frequency signal.
6. A signal processing apparatus, characterized by being applied to a digital video conversion device in which an electronic fence is preset, the electronic fence storing therein position information of an area that is allowed to receive a live signal, the signal processing apparatus comprising:
the power-on state control module is used for controlling the positioning equipment electrically connected with the digital video conversion equipment to work in a power-on mode when the digital video conversion equipment is powered on, and controlling the low-noise down converter electrically connected with the digital video conversion equipment to keep a power-off state;
the receiving module is used for receiving the positioning signals transmitted by the positioning satellites;
the determining module is used for determining whether the current position is positioned in a preset live broadcast signal receiving range according to the positioning signal;
the indication module is used for controlling the low-noise down converter to be electrified to work if the current position is located in the live broadcast signal receiving range, controlling the positioning equipment to be powered off, and sending a signal control instruction to the low-noise down converter, wherein the signal control instruction is used for indicating a first feed source of the low-noise down converter to receive a first live broadcast signal and mix the first live broadcast signal, outputting a first intermediate frequency signal, and indicating a second feed source of the low-noise down converter to receive a second live broadcast signal and mix the second live broadcast signal and output a second intermediate frequency signal;
the frequency band of the first intermediate frequency signal and the frequency band of the second intermediate frequency signal are respectively located in a preset live broadcast signal receiving frequency band.
7. A digital video conversion apparatus, characterized in that it implements the signal processing method according to claim 1 or 2 when it is powered on.
8. A low noise down converter comprising at least a first feed and a second feed, wherein the low noise down converter is powered on to implement a signal processing method as claimed in any one of claims 3 to 5.
CN202010141628.9A 2019-12-27 2020-03-03 Signal processing method, digital video conversion device and low noise down converter Active CN111314753B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN2019113750263 2019-12-27
CN201911375026 2019-12-27

Publications (2)

Publication Number Publication Date
CN111314753A CN111314753A (en) 2020-06-19
CN111314753B true CN111314753B (en) 2024-02-20

Family

ID=71160442

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010141628.9A Active CN111314753B (en) 2019-12-27 2020-03-03 Signal processing method, digital video conversion device and low noise down converter

Country Status (1)

Country Link
CN (1) CN111314753B (en)

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1693980A2 (en) * 2005-02-21 2006-08-23 FTA Communication Technologies SARL Low Noise Block down converter (LNB) for reception of Direct Broadcast Satellite (DBS) signals
CN2822035Y (en) * 2005-02-24 2006-09-27 台扬科技股份有限公司 Low noise frequency reducer of integrated satellite positioning system
CN203722751U (en) * 2014-01-23 2014-07-16 浙江盛洋科技股份有限公司 KU-waveband high frequency tuner for receiving signal of two satellites simultaneously
CN105611333A (en) * 2015-12-28 2016-05-25 北京中传数广技术有限公司 Satellite live broadcast system and method in support of longitude and latitude authorization
CN105703788A (en) * 2016-03-08 2016-06-22 广州易迩达电子有限公司 Low-noise down-converter applied to multi-path satellite receiver, and satellite receiving system
CN105721918A (en) * 2016-03-25 2016-06-29 泰斗微电子科技有限公司 Satellite television set top box and corresponding control method
CN105744333A (en) * 2016-03-18 2016-07-06 泰斗微电子科技有限公司 LNB module used for receiving satellite television signals and corresponding satellite television set top box
CN105846838A (en) * 2016-04-22 2016-08-10 北京华晟欣瑞科技有限公司 Ku/V waveband double-frequency radiometer
CN106060678A (en) * 2016-02-18 2016-10-26 泰斗微电子科技有限公司 Direct-broadcast satellite television broadcast receiving system LNB (Low Noise Block) module and satellite television set top box
CN107623867A (en) * 2016-07-13 2018-01-23 络达科技股份有限公司 Have the top box of digital machine of positioning function and apply its satellite television receiving system

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1693980A2 (en) * 2005-02-21 2006-08-23 FTA Communication Technologies SARL Low Noise Block down converter (LNB) for reception of Direct Broadcast Satellite (DBS) signals
CN2822035Y (en) * 2005-02-24 2006-09-27 台扬科技股份有限公司 Low noise frequency reducer of integrated satellite positioning system
CN203722751U (en) * 2014-01-23 2014-07-16 浙江盛洋科技股份有限公司 KU-waveband high frequency tuner for receiving signal of two satellites simultaneously
CN105611333A (en) * 2015-12-28 2016-05-25 北京中传数广技术有限公司 Satellite live broadcast system and method in support of longitude and latitude authorization
CN106060678A (en) * 2016-02-18 2016-10-26 泰斗微电子科技有限公司 Direct-broadcast satellite television broadcast receiving system LNB (Low Noise Block) module and satellite television set top box
CN105703788A (en) * 2016-03-08 2016-06-22 广州易迩达电子有限公司 Low-noise down-converter applied to multi-path satellite receiver, and satellite receiving system
CN105744333A (en) * 2016-03-18 2016-07-06 泰斗微电子科技有限公司 LNB module used for receiving satellite television signals and corresponding satellite television set top box
CN105721918A (en) * 2016-03-25 2016-06-29 泰斗微电子科技有限公司 Satellite television set top box and corresponding control method
CN105846838A (en) * 2016-04-22 2016-08-10 北京华晟欣瑞科技有限公司 Ku/V waveband double-frequency radiometer
CN107623867A (en) * 2016-07-13 2018-01-23 络达科技股份有限公司 Have the top box of digital machine of positioning function and apply its satellite television receiving system

Also Published As

Publication number Publication date
CN111314753A (en) 2020-06-19

Similar Documents

Publication Publication Date Title
KR100741332B1 (en) Method and apparatus for selecting a satellite signal
US9654838B2 (en) Single-cable automatic IRD installation procedure
US7142808B2 (en) Satellite broadcast receiver apparatus intended to reduce power consumption
CN109119761A (en) The method, control equipment and system of satellite switching are carried out to motor antenna
CN111314753B (en) Signal processing method, digital video conversion device and low noise down converter
CN111314752B (en) Low-noise down converter and signal processing method
CN212115497U (en) Low-noise down converter
JP2004248079A (en) Television broadcast signaling system, transmitting device, and receiving device
US11671171B2 (en) Satellite dish LNB, satellite broadcast signal receiver and methods of operation
JP3947031B2 (en) Satellite signal reception transmission system and switching distributor
JP3415526B2 (en) Satellite receiving system and booster device and power supply device used in the system
JP4187899B2 (en) Joint reception system, terminal device thereof and frequency converter for terminal
EP3637639A1 (en) Satellite broadcast signal receiver, method of operation of satellite broadcast signal receivers and switch therefor
JP4394262B2 (en) Satellite reception system
JP3594796B2 (en) Satellite signal receiving system and signal distribution switching device
KR100192791B1 (en) Apparatus for preventing a degradation of a lnb
JP2000032293A (en) Satellite reception system and reception signal mixer
WO2011122674A1 (en) Power source of television broadcast signal transmitter and television broadcast signal transmitting system
US20070288968A1 (en) Video and data home networking architectures
JP4414049B2 (en) Satellite reception system
WO2011122675A1 (en) Television broadcast signal transmission system
KR20090009150U (en) Multi-channel TV repeater system
JP2004242346A (en) Amplifier for satellite signal receiving system
JPH09162646A (en) Converter in common use for receiving circularly polarized wave and linearly polarized wave and receiver using the converter
JP2004229320A (en) Amplifier for satellite signal receiving system

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant