CN111147827A - Signal processing method and device and digital video conversion equipment - Google Patents
Signal processing method and device and digital video conversion equipment Download PDFInfo
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- CN111147827A CN111147827A CN201911374985.3A CN201911374985A CN111147827A CN 111147827 A CN111147827 A CN 111147827A CN 201911374985 A CN201911374985 A CN 201911374985A CN 111147827 A CN111147827 A CN 111147827A
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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]
- H04N21/60—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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- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The embodiment of the application is applicable to the technical field of communication, and provides a signal processing method, a signal processing device and digital video conversion equipment, wherein the method is applied to the digital video conversion equipment and comprises the following steps: receiving a combined signal transmitted by satellite signal receiving equipment; separating the combined signal to obtain a satellite positioning signal and a satellite television signal; analyzing the satellite positioning signal to obtain the position information of the current position; and processing the satellite television signal according to the position information. The method can realize the positioning of the position of the digital video conversion equipment, thereby facilitating the management and control of the satellite television signals according to the difference of areas or regions, simultaneously not increasing the difficulty of equipment installation and line laying, and not bringing the cost pressure to users.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a signal processing method and apparatus, and a digital video conversion device.
Background
With the rapid development of scientific technology, especially information technology, people's lives have already entered the digital and information era, and the distribution of satellite broadcast television is accelerated in the process of digitalization and individualization. Although most regions around the world have realized the broadcasting of satellite television, in some special regions, the broadcasting of satellite television programs is influenced by factors such as national relations, geographical positions, urban and rural differences, and the like, so that certain use limitations exist. For example, in a specific area with a tight and complicated relationship, a satellite television program in a country a is not allowed to be played in a country B.
Due to the characteristics of satellite television broadcasting and opening, in the area which can be covered by satellite signals, after receiving the satellite television signals, the conventional satellite television receiver can demodulate the television broadcasts through equipment such as a set top box and the like, so that the normal playing is realized. Therefore, if the television program is to be monitored at the satellite terminal, the television program played in a certain area is individually encrypted or turned off, which is very difficult in technology and high in cost.
Disclosure of Invention
In view of this, embodiments of the present application provide a signal processing method and apparatus, and a digital video conversion device, which can implement positioning of a location where the digital video conversion device is located, so as to facilitate management and control of satellite television signals according to different areas or regions, and at the same time, difficulty in installation of the device and difficulty in laying a line are not increased, and pressure on cost is not brought to a user.
A first aspect of an embodiment of the present application provides a signal processing method, which is applied to a satellite signal receiving device, and the signal processing method includes:
receiving satellite positioning signals transmitted by a positioning satellite and receiving satellite television signals transmitted by a direct broadcast satellite;
combining the satellite positioning signal and the satellite television signal to obtain a combined signal;
and transmitting the combined signal to digital video conversion equipment to indicate the digital video conversion equipment to separate the combined signal, obtain the satellite positioning signal and the satellite television signal, and process the satellite television signal according to the position information corresponding to the satellite positioning signal.
A second aspect of the embodiments of the present application provides a signal processing method applied to a digital video conversion device, the signal processing method including:
receiving a combined signal transmitted by satellite signal receiving equipment;
separating the combined signal to obtain a satellite positioning signal and a satellite television signal;
analyzing the satellite positioning signal to obtain the position information of the current position;
and processing the satellite television signal according to the position information.
A third aspect of the embodiments of the present application provides a signal processing apparatus, which is applied to a satellite signal receiving device, and includes:
the satellite positioning signal receiving module is used for receiving satellite positioning signals transmitted by a positioning satellite;
the satellite television signal receiving module is used for receiving satellite television signals transmitted by a direct broadcast satellite;
the signal combining module is used for combining the satellite positioning signal and the satellite television signal to obtain a combined signal;
and the combined signal transmission module is used for transmitting the combined signal to digital video conversion equipment so as to instruct the digital video conversion equipment to separate the combined signal, obtain the satellite positioning signal and the satellite television signal, and process the satellite television signal according to the position information corresponding to the satellite positioning signal.
A fourth 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 combined signal receiving module is used for receiving the combined signal transmitted by the satellite signal receiving equipment;
the combined signal separation module is used for separating the combined signal to obtain a satellite positioning signal and a satellite television signal;
the positioning module is used for analyzing the satellite positioning signal to obtain the position information of the current position;
and the satellite television signal processing module is used for processing the satellite television signal according to the position information.
A fifth aspect of embodiments of the present application provides a satellite signal receiving apparatus, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, the processor implementing the signal processing method according to the first aspect when executing the computer program.
A sixth aspect of embodiments of the present application provides a digital video transform apparatus, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, the processor implementing the signal processing method according to the second aspect when executing the computer program.
A seventh aspect of embodiments of the present application provides a computer-readable storage medium, which stores a computer program, wherein the computer program, when executed by a processor of a satellite signal receiving apparatus, implements the signal processing method according to the first aspect.
An eighth aspect of embodiments of the present application provides a computer-readable storage medium storing a computer program, wherein the computer program, when executed by a processor of a digital video conversion device, implements the signal processing method according to the second aspect.
Compared with the prior art, the embodiment of the application has the following advantages:
according to the embodiment of the application, on the basis that the satellite positioning signal and the satellite television signal are combined through the satellite receiving equipment, the set top box can separate the combined signal and output the satellite positioning signal and the satellite television signal. The satellite positioning signal can be used for positioning the position of the set-top box, so that whether the position belongs to an area needing to control the satellite television signal or not can be judged conveniently, and the set-top box can process the satellite television signal in a targeted manner according to a judgment result. According to the embodiment, the satellite television signal and the satellite positioning signal are combined and transmitted, the two paths of signals are separated at the set top box end, and the positioning of the position of the set top box can be realized by using the satellite television signal and the satellite positioning signal independently, so that the satellite television signal is conveniently controlled according to different regions or regions, the difficulty of equipment installation and line laying is not increased, multiple signals can be simultaneously transmitted between the satellite receiving equipment and the set top box through one cable, other cables do not need to be additionally arranged, the pressure on the cost of a user is not brought, and the signal transmission cost is reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the embodiments or the description of the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
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 schematic diagram of a combining circuit according to an embodiment of the present application;
FIG. 3 is a flow chart illustrating steps of another signal processing method according to an embodiment of the present application;
FIG. 4 is a flow chart illustrating steps of another signal processing method according to an embodiment of the present application;
fig. 5 is a schematic diagram of a power dividing circuit according to an embodiment of the present application;
FIG. 6 is a schematic diagram of a time-sharing control circuit according to one embodiment of the present application;
fig. 7 is a schematic diagram of a system to which a signal processing method according to an embodiment of the present application is applied;
FIG. 8 is a schematic diagram of a signal processing apparatus according to an embodiment of the present application;
FIG. 9 is a schematic diagram of another signal processing apparatus according to an embodiment of the present application;
fig. 10 is a schematic diagram of a terminal 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 structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent 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.
At present, in order to realize the management and control of satellite television signals received in different areas, the industry proposes to add a positioning chip on the basis of a traditional set top box, realize the accurate positioning of the set top box through the positioning chip, ensure that the set top box can only work when the set top box is in a specific area range, normally demodulate the satellite television signals, and output corresponding television programs.
However, after a satellite positioning chip is added to a conventional set-top box, coaxial lines for respectively receiving satellite television signals and satellite positioning signals need to be configured. At present, a coaxial line capable of receiving satellite television signals is generally configured on a traditional set top box, and if the satellite television signals and the satellite positioning signals need to be separately received, two cables need to be configured on the set top box to respectively receive different signals. In addition, the two cables need to be connected to satellite signal receiving equipment outdoors, such as a satellite receiving pot and the like.
This leads to the following problems:
1) if more cables need to be configured for the same set of equipment, the laying of lines is increased for the house-entry, which not only brings difficulty in line management, but also increases the product cost;
2) if the outdoor satellite signal receiving equipment can work only by needing a plurality of sets of cables, the problems of high equipment cost, difficult installation and the like can be caused, and the equipment does not conform to the popularization property of the service of a radio and television system.
Therefore, in order to solve the above problems, two processes of receiving satellite television signals and receiving satellite positioning signals can be performed simultaneously, the production and installation costs of equipment are not increased, and the installation and laying difficulty of the equipment and cables is reduced, the core concept of the embodiment of the application is that the satellite television signals and the satellite positioning signals are combined and transmitted, two paths of signals are decomposed at the set top box end, and the set top box is used independently, so that the position of the set top box can be positioned, the satellite television signals can be conveniently controlled according to different regions or regions, the installation and line laying difficulty of the equipment is not increased, and the cost pressure can not be brought to users.
The technical solution of the present application will be described below by way of specific examples.
Referring to fig. 1, a schematic flow chart illustrating steps 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 satellite positioning signal transmitted by a positioning satellite, and receiving a satellite television signal transmitted by a direct broadcast satellite;
it should be noted that the method may be applied to a satellite receiving device, that is, the execution subject of the embodiment is the satellite receiving device. The satellite positioning signals transmitted by the positioning satellite and the satellite television signals transmitted by the direct broadcast satellite are received through the satellite receiving equipment, the two signals are combined, the combined signals are transmitted to the set top box, and the satellite positioning signals and the satellite television signals are separated through the set top box.
The satellite receiving device in this embodiment may be a satellite pan or the like. The satellite pan is a metal paraboloid and is responsible for reflecting satellite signals to a feed source and a high-frequency head which are positioned at the focus of the satellite antenna, and the satellite pan is used for collecting weak signals transmitted by the satellite and removing noise as far as possible.
In this embodiment, the satellite positioning signal transmitted by the positioning satellite may be a positioning signal transmitted by a positioning satellite of a beidou satellite navigation system, or may be a signal transmitted by a positioning satellite of another positioning system, such as a beidou BDS system, a GPS system, a GLONASS system, or a GALIEO system, which is not limited in this embodiment.
S102, combining the satellite positioning signal and the satellite television signal to obtain a combined signal;
in this embodiment, combining the satellite positioning signal and the satellite television signal may be implemented by a combiner circuit.
Fig. 2 is a schematic diagram of a combining circuit according to this embodiment. According to the circuit configuration shown in fig. 2, signal combination of the satellite positioning signal and the satellite television signal can be realized by impedance transformation matching.
In existing communication systems, the termination load is 50 ohms, i.e. the impedance junction at the junction should be 50 ohms. According to the merged matching circuit shown in fig. 2, since Zout is 50 ohms and Zout is Zin1// Zin2 is 50 ohms as viewed from the output terminal and is divided equally, Zin1 is Zin2, i.e., the input impedance at 102 and 103 should be 100 ohms, so that 50 ohms is achieved by impedance conversion to the output terminal Zout.
In a specific implementation, the satellite positioning signal may be input to a first input interface to which a first input impedance, Zin1 in fig. 2; and inputs the satellite television signal to a second input interface to which a second input impedance, Zin2 in fig. 2, is connected. As can be seen from the circuit configuration shown in fig. 2, the first input impedance Zin1 is connected in parallel with the second input impedance Zin2 and then connected to the output impedance Zout, the impedance value of the first input impedance Zin1 is equal to the impedance value of the second input impedance Zin2, and the impedance value of the output impedance Zout is half of the impedance value of the first input impedance Zin1 or the second input impedance Zin 2. That is, Zin1 is Zin2 is 50 ohms and Zout is 100 ohms.
The combined signal output via the output interface, which is connected to the output impedance Zout, is then received.
S103, transmitting the combined signal to digital video conversion equipment to instruct the digital video conversion equipment to separate the combined signal, so as to obtain the satellite positioning signal and the satellite television signal, and processing the satellite television signal according to the position information corresponding to the satellite positioning signal.
The combined signal obtained after the combination by the satellite signal receiving equipment can be transmitted to the set-top box through a cable, and the set-top box performs corresponding processing after separating the combined signal.
In a specific implementation, the satellite positioning signals obtained after the separation can be used for positioning the current position, and the satellite television signals can be processed in a targeted manner according to the position information obtained by the positioning. For example, if the position information obtained by positioning shows that the set-top box is within a preset position range, and the range belongs to an area needing to control the satellite television signal, the set-top box can lock the received satellite television signal and does not process the satellite television signal; if the position information obtained by positioning shows that the set-top box is not in the range in which the satellite television signals need to be controlled, the set-top box can demodulate the satellite television signals and output corresponding television programs for users to watch.
In the embodiment of the application, after receiving the satellite positioning signal transmitted by the positioning satellite and the satellite television signal transmitted by the direct broadcast satellite, the two satellite signals can be combined to obtain the combined signal, so that the combined signal is transmitted to the digital video conversion device through the existing cable of the satellite receiving device, and the digital video conversion device separates the combined signal to obtain the satellite positioning signal and the satellite television signal. This embodiment can realize transmitting multiple signal by a cable simultaneously through merging two kinds of signals, and need not to add other cables respectively on satellite receiving equipment and digital video transform equipment, has reduced the signal transmission cost.
Referring to fig. 3, a schematic flow chart illustrating steps of another signal processing method according to an embodiment of the present application is shown, which may specifically include the following steps:
s301, receiving a combined signal transmitted by satellite signal receiving equipment;
it should be noted that the method may be applied to a digital video converter (Set Top Box, STB), that is, the execution subject of the present embodiment is the digital video converter. The digital video conversion device may separate the combined signal by receiving the combined signal transmitted through the satellite signal receiving device. The process of combining multiple signals by the satellite signal receiving device to obtain the combined signal may refer to the description of the foregoing embodiment, which is not described again in this embodiment.
A digital video conversion device, commonly referred to as a set-top box or set-top box, is a device that connects a television set to an external signal source. Which 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, and so on.
S302, separating the combined signal to obtain a satellite positioning signal and a satellite television signal;
since the combined signal transmitted by the satellite signal receiving device is obtained by combining a plurality of different signals, the set-top box needs to separate the signals after receiving the signals.
In this embodiment, the combined signal transmitted by the satellite signal receiving device may be obtained by combining a satellite positioning signal and a satellite television signal, and after the set-top box separates the combined signal, the set-top box may obtain a corresponding satellite positioning signal and a corresponding satellite television signal.
S303, analyzing the satellite positioning signal to obtain the position information of the current position;
in this embodiment, a positioning chip may be added to the set-top box, and the positioning chip processes the received satellite positioning signal to position the set-top box.
Analyzing the satellite positioning signal to obtain corresponding position information is a mature technology at present, and this embodiment is not described herein again.
And S304, processing the satellite television signal according to the position information.
In this embodiment, the satellite television signals can be processed in a targeted manner based on the position information obtained by the positioning. For example, if the position information obtained by positioning shows that the set-top box is within a preset position range, and the range belongs to an area needing to control the satellite television signal, the set-top box can lock the received satellite television signal and does not process the satellite television signal; if the position information obtained by positioning shows that the set-top box is not in the range in which the satellite television signals need to be controlled, the set-top box can demodulate the satellite television signals and output corresponding television programs for users to watch.
In the embodiment of the application, on the basis of combining the satellite positioning signal and the satellite television signal through the satellite receiving device, the set top box can separate the combined signal and output the satellite positioning signal and the satellite television signal. The satellite positioning signal can be used for positioning the position of the set-top box, so that whether the position belongs to an area needing to control the satellite television signal or not can be judged conveniently, and the set-top box can process the satellite television signal in a targeted manner according to a judgment result. According to the embodiment, the satellite television signal and the satellite positioning signal are combined and transmitted, the two paths of signals are separated at the set top box end, and the positioning of the position of the set top box can be realized by using the satellite television signal and the satellite positioning signal independently, so that the satellite television signal is conveniently controlled according to different regions or regions, the difficulty of equipment installation and line laying is not increased, multiple signals can be simultaneously transmitted between the satellite receiving equipment and the set top box through one cable, other cables do not need to be additionally arranged, the pressure on the cost of a user is not brought, and the signal transmission cost is reduced.
Referring to fig. 4, a schematic flow chart illustrating steps of another signal processing method according to an embodiment of the present application is shown, which may specifically include the following steps:
s401, receiving a combined signal transmitted by satellite signal receiving equipment;
it should be noted that the method may be applied to a set top box, that is, the execution subject of the embodiment is the set top box. The positioning chip is configured in the set top box and used for processing the satellite positioning signals, so that the position of the set top box can be accurately positioned, and the satellite television signals can be conveniently controlled according to the actual requirements of the region where the set top box is located.
The satellite positioning signal and the satellite television signal may be transmitted to the set-top box via a satellite receiving device.
In this embodiment, after receiving the satellite positioning signal and the satellite television signal, the satellite receiving device may combine the two signals to obtain a corresponding combined signal, and then transmit the combined signal to the set-top box through a cable.
S402, inputting the combined signal to a preset power dividing circuit, wherein the power dividing circuit comprises a first output interface and a second output interface, each device on a first path corresponding to the first output interface forms a first filter, each device on a second path corresponding to the second output interface forms a second filter, and the cutoff frequency of the first filter is greater than that of the second filter;
in this embodiment, the received combined signal may be separated by a power dividing circuit.
Fig. 5 is a schematic diagram of a power dividing circuit according to this embodiment. As shown in fig. 5, the power dividing circuit includes a plurality of resistors, capacitors, and inductors. The combined signal is input to the power dividing circuit via the input interface 201, and after being separated, the combined signal can be output by the first output interface 202 and the second output interface 203. Wherein the path from the input interface 201 to the first output interface 202 constitutes a first path for splitting satellite positioning signals, and the path from the input interface 201 to the second output interface 203 constitutes a second path for splitting satellite television signals.
Generally, the operating frequency point of the satellite television signal is 950MHz to 1450MHz, while the operating frequency point of the satellite positioning signal is relatively higher, for example, the central frequency point of the positioning signal transmitted by the beidou navigation system is 1602MHz, and the typical central frequency point of the positioning signal transmitted by the GPS system is 1575 MHz. Therefore, in order to separate the satellite positioning signal and the satellite television signal, when designing the power dividing circuit, a plurality of devices may be disposed on the first path to collectively form a high pass filter, which is a first filter, and a plurality of devices may be disposed on the second path to collectively form a low pass filter, which is a second filter, such that the cutoff frequency of the first filter is greater than the cutoff frequency of the second filter, and the two filters may separate the satellite positioning signal and the satellite television signal from each other.
For example, in fig. 5, the capacitor C1 and the inductor L2 on the first path may constitute a high pass filter for separating satellite positioning signals, while the inductor L1 and the capacitor C3 on the second path may constitute a low pass filter for separating satellite television signals. The resistors R1 and R2, the capacitor C2, and the inductor L3 may be configured according to corresponding parameters, so as to implement other functions in the separation process of the combined signal, such as enhancing and attenuating the signal, and balancing the insertion loss at two ends.
S403, separating the combined signal through the power dividing circuit;
s404, receiving the satellite positioning signal output by the first output interface, and receiving the satellite television signal output by the second output interface;
the satellite positioning signal output by the first output interface 202 of the power dividing circuit can be transmitted to a positioning chip and a matching device for positioning calculation, and the satellite television signal output by the second output interface 203 can be transmitted to a satellite television signal demodulator, a tuner and a peripheral device.
On the other hand, in this embodiment, parameters of key components R1, R2, C1, C2, L1, L2, and the like in the power dividing circuit may be adjusted according to different signal strength requirements of two signals (a satellite television signal and a satellite positioning signal), the two signals are attenuated at different strengths, and then sent to corresponding processing units to be processed, so as to flexibly balance application requirements of the two processing units on different signal strengths, and to avoid receiving quality degradation caused by too strong or too weak signals.
For example, in the power division circuit shown in fig. 5, it is necessary to consider that the insertion loss of the satellite positioning signal link and the insertion loss of the satellite television signal link cannot be too large, and the standing wave and the reflection on the port are balanced. In fig. 5, R1, R2, C1, C2, L1 and L2 are main devices for comprehensively balancing insertion loss, standing wave and reflection balance at two ends, wherein the most critical core device influencing the carrier-to-noise ratio of satellite positioning signals and the receiving sensitivity of satellite television signals is R1 resistance. In one example, when R1 takes 51 ohms, the attenuation of the signals at the two ends is relatively balanced; when the value of R1 is 240 ohms, the satellite positioning signal is enhanced by 0.5dBm, and the satellite television signal is attenuated by 0.81 dBm; when the value of R1 is more than 1000 ohms, the satellite positioning signal is enhanced by 2dBm, and the signal attenuation of the satellite television is 4 dBm; when R1 takes on a capacitance of 0.8pF, the satellite positioning signal is attenuated by 3dBm and the satellite television signal is enhanced by 0.9 dBm. In practical application, signal sensitivity changes affected by value changes of parameters of each device are not uniform, and corresponding application requirements can be met only by obtaining a group of parameter values which do not affect normal reception of satellite positioning signals and satellite television signals, which is not limited in this embodiment.
S405, analyzing the satellite positioning signal to obtain position information of the current position;
in this embodiment, after receiving the satellite positioning signal, the positioning chip in the set-top box may analyze the positioning signal to obtain the position information of the current position, where the current position is the position where the set-top box is placed. The position information may be longitude and latitude information of a position where the set top box is located.
S406, judging whether the position point corresponding to the position information is located in a preset position range;
in this embodiment, for the location information obtained through analysis, the set top box may first determine whether a location point corresponding to the location information is located within a preset location range. The preset location range may refer to an area or a range in which the satellite television signal needs to be controlled.
In a specific implementation, for longitude and latitude information obtained by analysis, a target location point may be determined according to the longitude and latitude information, and then the target location point is matched with a plurality of location points in preset map data to determine whether the target location point is a location point in an area included in the map data.
In the present embodiment, the preset map data may be a data set containing geographic data of a certain area or a plurality of areas. For any one area, the map data corresponding to the area can be regarded as a set of a plurality of position points.
For example, from certain longitude data and latitude data, a location point on the earth can be uniquely determined. However, whether the location point belongs to a certain country or region cannot be directly determined. Therefore, the determined location point can be matched with the preset map data, and since the map data contains detailed longitude and latitude information of a plurality of location points, whether the current location is within a certain country or region can be judged through the location point obtained by matching in the map data.
In this embodiment, if the same position point as the target position point is matched in the map data, it can be determined that the position point corresponding to the position information is within a preset position range. At this time, step S407 may be executed to lock the received satellite television signal; otherwise, it may be determined that the location point corresponding to the location information is not within the preset location range, and step S408 is performed to demodulate the satellite television signal and output a television program corresponding to the satellite television signal.
S407, locking the received satellite television signal;
in this embodiment, processing the satellite television signal according to the position information of the current position may include playing a television program corresponding to the satellite television signal, or not playing the television program.
In a specific implementation, if the location point corresponding to the location information of the current location is located within a preset location range, it indicates that the satellite television signal needs to be managed and controlled within the range. At this time, the set-top box may be controlled to lock the received satellite television signal and not play the television program corresponding to the signal.
S408, demodulating the satellite television signal and outputting a television program corresponding to the satellite television signal.
If the current position is not within the preset position range, that is, the current position of the set-top box belongs to the area which allows the satellite television signal to be received and can be normally played, at this moment, the set-top box can demodulate the received satellite television signal and output the television program corresponding to the signal.
In a specific implementation, the set-top box needs to perform frequency conversion on a received satellite television signal to obtain an intermediate frequency signal meeting the requirement of a receiving frequency band of the current set-top box, and then process the intermediate frequency signal, for example, perform amplification, a/D conversion (analog-to-digital conversion), demodulation, and the like on the intermediate frequency signal, and output a television program corresponding to the intermediate frequency signal.
As an example of the present embodiment, when processing the separated satellite positioning signal and satellite television signal, the method can also be implemented by time-sharing control.
Fig. 6 is a schematic diagram of a time-sharing control circuit according to the present embodiment. In fig. 6, an input interface of the combined signal is 201'; after the power dividing circuit separates the combined path signal, the satellite positioning signal can be output through the output interface 202', that is, the signal on the interface is directly sent to the signal unit of the positioning chip for positioning; when the position information obtained by positioning does not belong to the control range of the satellite television signal, the satellite television signal can be switched to be output through the interface 203', namely, the signal on the interface is directly sent to a demodulator and a tuner of the satellite television for demodulation processing so as to output the corresponding television program.
It should be noted that, for different types of received television signals, corresponding frequency conversion and demodulation processes are different, and this embodiment is not particularly limited to this.
This embodiment is through merging the transmission with satellite television signal and satellite positioning signal, again separate two way signals through the merit branch circuit at the set-top box end, and the isolated use, can realize the location to the STB position, thereby be convenient for carry out the management and control to satellite television signal according to the difference in region or area, can not increase the degree of difficulty that equipment fixing and circuit were laid again, can realize transmitting multiple signal simultaneously by a cable between satellite receiving equipment and STB, and need not to add other cables, can not bring the pressure on the cost for the user, the signal transmission cost has been reduced.
It should be noted that, the sequence numbers of the steps in the foregoing embodiments do not mean the execution sequence, and the execution sequence of each process should be determined by the function and the inherent logic of the process, and should not constitute any limitation on the implementation process of the embodiments of the present application.
For the sake of understanding, the signal processing method of the present embodiment is described below with reference to a specific example. As shown in fig. 7, it is a schematic structural diagram of a system to which a signal processing method of the present embodiment is applied, and the system includes a satellite signal receiving device 710, a positioning satellite 711, and a direct broadcast satellite 712. Satellite positioning signals transmitted by a positioning satellite 711 and satellite television signals transmitted by a direct broadcast satellite 712 may be received by the satellite receiving device 710, and the satellite receiving device 710 may combine the two signals and transmit the combined signal to the set-top box 701 via the cable 709. The satellite signal receiving apparatus 710 shown in fig. 7 may be a satellite receiving pot that can simultaneously receive satellite television signals of high definition television programs and satellite positioning signals, and the cable 709 may be a single-core coaxial line.
When the set-top box 701 processes the combined signal, the reasonable signal may be first transmitted to the power dividing circuit 702, and the power dividing circuit 702 separates the reasonable signal to obtain a satellite positioning signal and a satellite television signal.
The satellite positioning signals can be transmitted to the positioning device 704 for positioning, and the positioning device 704 can include a positioning chip and configuration circuits related to positioning. The positioning chip may output the position information obtained by resolving and analyzing the satellite positioning signal to the main chip 705, and the positioning chip is in one-way communication with the main chip 705. The positioning chip can be a radio frequency chip, a baseband chip or a radio frequency baseband integrated chip.
The satellite television signal may be transmitted to a demodulation apparatus 703 for processing, and the demodulation apparatus 703 may include a demodulator and a tuner. The demodulator can be in two-way communication with the set-top box main chip 705 and the tuner respectively, and can amplify, A/D convert (analog-to-digital convert) and demodulate three television signals of a ground digital signal, a cable digital signal and an analog signal in an intermediate frequency form; amplifying, A/D converting and demodulating the ground digital signal and the cable digital television signal in the form of intermediate frequency, and outputting a TS signal; the analog television signal in the intermediate frequency form is amplified, a/D converted, and demodulated, and then a video signal and an audio signal are output through a BT656 bus and an IIS bus, respectively. The tuner can receive three television signals, namely a terrestrial digital signal, a cable digital signal and an analog signal in a radio frequency form, and can down-convert the radio frequency signal into an intermediate frequency signal.
As shown in fig. 7, the main chip 705 further includes a peripheral interface 706, which may include various types of interfaces, such as:
and the command input interface is used for receiving input information and at least comprises one of an infrared receiving device and a front panel.
And the communication interface is connected with the television module and is used for transmitting control information and state information.
And the condition processing module is in two-way communication with the main chip of the set-top box and at least comprises one of a smart card interface and a card-free CA security chip.
The audio and Video output interface is used for outputting audio signals and Video signals and at least comprises one of CVBS, HDMI, YPbPr, VGA, S-Video and SPDIF; if the HDMI interface is included, the HDMI interface can be connected with the television module to transmit audio and video data, control information and state information.
The network interface is an RJ45 network interface, and the communication interface is an RS232 interface.
In addition, the main chip 705 further comprises a storage interface 707, and the storage interface 707 at least comprises one of a USB interface, an SD/MMC card interface, an IDE interface and a SATA interface, for implementing bidirectional communication between the storage unit and the set-top box main chip 705. The storage unit may include a RAM and a FLASH. The RAM is used for providing program operation and data cache space and at least comprises one of SDRAM and DDR SDRAM; FLASH is used for program data and application data storage and comprises at least one of NORFLASH and NAND FLASH.
After being processed by the set-top box, the television program meeting the requirements can be played on the television 708.
Referring to fig. 8, a schematic diagram of a signal processing apparatus according to an embodiment of the present application is shown, where the apparatus may be applied to a satellite signal receiving device, and specifically may include the following modules:
a satellite positioning signal receiving module 801, configured to receive a satellite positioning signal transmitted by a positioning satellite;
a satellite television signal receiving module 802, configured to receive a satellite television signal transmitted by a direct broadcast satellite;
a signal combining module 803, configured to combine the satellite positioning signal and the satellite television signal to obtain a combined signal;
a combined signal transmission module 804, configured to transmit the combined signal to a digital video conversion device, so as to instruct the digital video conversion device to separate the combined signal, obtain the satellite positioning signal and the satellite television signal, and process the satellite television signal according to position information corresponding to the satellite positioning signal.
In this embodiment of the application, the signal combining module 803 may specifically include the following sub-modules:
the satellite positioning signal input submodule is used for inputting the satellite positioning signal to a first input interface, and the first input interface is connected with a first input impedance;
the satellite television signal input submodule is used for inputting the satellite television signal to a second input interface, the second input interface is connected with a second input impedance, the first input impedance and the second input impedance are connected in parallel and then connected with an output impedance, and the impedance value of the first input impedance is equal to that of the second input impedance;
and the combined signal receiving submodule is used for receiving the combined signal output by the output interface, the output interface is connected with the output impedance, and the impedance value of the output impedance is half of the impedance value of the first input impedance.
Referring to fig. 9, a schematic diagram of another signal processing apparatus according to an embodiment of the present application is shown, where the apparatus may be applied to a digital video conversion device, and specifically may include the following modules:
a combined signal receiving module 901, configured to receive a combined signal transmitted by a satellite signal receiving device;
a combined signal separating module 902, configured to separate the combined signal to obtain a satellite positioning signal and a satellite television signal;
a positioning module 903, configured to analyze the satellite positioning signal to obtain position information of a current position;
and a satellite television signal processing module 904, configured to process the satellite television signal according to the position information.
In this embodiment of the application, the combining signal separating module 902 may specifically include the following sub-modules:
the combiner signal input submodule is used for inputting the combiner signal to a preset power divider circuit, the power divider circuit comprises a first output interface and a second output interface, each device on a first path corresponding to the first output interface forms a first filter, each device on a second path corresponding to the second output interface forms a second filter, and the cutoff frequency of the first filter is greater than that of the second filter;
the combined signal separation submodule is used for separating the combined signal through the power dividing circuit;
a satellite positioning signal receiving sub-module for receiving satellite positioning signals output via the first output interface, and,
and the satellite television signal receiving submodule is used for receiving the satellite television signal output by the second output interface.
In this embodiment, the satellite television signal processing module 904 may specifically include the following sub-modules:
the position information judgment submodule is used for judging whether a position point corresponding to the position information is positioned in a preset position range or not;
the satellite television signal submodule is used for locking the received satellite television signal if the position point corresponding to the position information is located in a preset position range;
and the satellite television signal demodulation submodule is used for demodulating the satellite television signal and outputting a television program corresponding to the satellite television signal if the position point corresponding to the position information is not in the preset position range.
In this embodiment of the present application, the location information may include longitude and latitude information, and the location information determining sub-module may specifically include the following units:
the target position point determining unit is used for determining a target position point according to the longitude and latitude information of the current position;
a target location point matching unit for matching the target location point with a plurality of location points in preset map data;
a target position point determination unit configured to determine that a position point corresponding to the position information is within a preset position range if a position point identical to the target position point is matched in the map data; otherwise, judging that the position point corresponding to the position information is not in a preset position range.
In this embodiment, the satellite television signal demodulation sub-module may specifically include the following units:
the satellite television signal frequency conversion unit is used for carrying out frequency conversion on the satellite television signal to obtain an intermediate frequency signal meeting the receiving frequency band requirement of the digital video conversion equipment;
and the television program output unit is used for processing the intermediate frequency signal and outputting the television program corresponding to the intermediate frequency signal.
For the apparatus embodiment, since it is substantially similar to the method embodiment, it is described relatively simply, and reference may be made to the description of the method embodiment section for relevant points.
Referring to fig. 10, a schematic diagram of a digital video conversion device according to an embodiment of the present application is shown. As shown in fig. 10, the digital video conversion apparatus 1000 of the present embodiment includes: a processor 1010, a memory 1020, and a computer program 1021 stored in the memory 1020 and operable on the processor 1010. The processor 1010 implements the steps of the signal processing method on the digital video converting apparatus side in various embodiments when executing the computer program 1021, such as the steps S301 to S304 shown in fig. 3. Alternatively, the processor 1010, when executing the computer program 1021, implements the functions of the modules/units in the above-mentioned device embodiments, such as the functions of the modules 901 to 904 shown in fig. 9.
Illustratively, the computer program 1021 may be partitioned into one or more modules/units that are stored in the memory 1020 and executed by the processor 1010 to accomplish the present application. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions, which may be used to describe the execution process of the computer program 1021 in the digital video conversion device 1000. For example, the computer program 1021 may be divided into a combined signal receiving module, a combined signal separating module, a positioning module, and a satellite tv signal processing module, and the specific functions of each module are as follows:
the combined signal receiving module is used for receiving the combined signal transmitted by the satellite signal receiving equipment;
the combined signal separation module is used for separating the combined signal to obtain a satellite positioning signal and a satellite television signal;
the positioning module is used for analyzing the satellite positioning signal to obtain the position information of the current position;
and the satellite television signal processing module is used for processing the satellite television signal according to the position information.
The digital video converter 1000 may include, but is not limited to, a processor 1010 and a memory 1020. Those skilled in the art will appreciate that fig. 10 is only one example of the digital video converter 1000, and does not constitute a limitation to the digital video converter 1000, and may include more or less components than those shown, or combine some components, or different components, for example, the digital video converter 1000 may further include an input-output device, a network access device, a bus, etc.
The Processor 1010 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The storage 1020 may be an internal storage unit of the digital video converter 1000, such as a hard disk or a memory of the digital video converter 1000. The memory 1020 may also be an external storage device of the Digital video converter device 1000, such as a plug-in hard disk, a Smart Memory Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like, provided on the Digital video converter device 1000. Further, the memory 1020 may also include both an internal storage unit and an external storage device of the digital video converter 1000. The memory 1020 is used for storing the computer program 1021 and other programs and data required by the digital video converter apparatus 1000. The memory 1020 may also be used to temporarily store data that has been output or is to be output.
The embodiment of the application also discloses a satellite signal receiving device, which comprises a memory, a processor and a computer program which is stored in the memory and can run on the processor, wherein when the processor executes the computer program, the signal processing method of the embodiment of the satellite signal receiving device side is realized.
The embodiment of the present application further discloses a computer-readable storage medium, which stores a computer program, wherein the computer program, when executed by a processor of a satellite signal receiving device, implements the signal processing method according to the embodiment on the satellite signal receiving device side.
The above-mentioned embodiments are only used 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 should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (10)
1. A signal processing method applied to a satellite signal receiving apparatus, the signal processing method comprising:
receiving satellite positioning signals transmitted by a positioning satellite and receiving satellite television signals transmitted by a direct broadcast satellite;
combining the satellite positioning signal and the satellite television signal to obtain a combined signal;
and transmitting the combined signal to digital video conversion equipment to indicate the digital video conversion equipment to separate the combined signal, obtain the satellite positioning signal and the satellite television signal, and process the satellite television signal according to the position information corresponding to the satellite positioning signal.
2. The method of claim 1, wherein combining the satellite positioning signal and the satellite television signal to obtain a combined signal comprises:
inputting the satellite positioning signal to a first input interface, wherein the first input interface is connected with a first input impedance;
inputting the satellite television signal to a second input interface, wherein the second input interface is connected with a second input impedance, the first input impedance and the second input impedance are connected in parallel and then connected with an output impedance, and the impedance value of the first input impedance is equal to that of the second input impedance;
and receiving a combined signal output by an output interface, wherein the output interface is connected with the output impedance, and the impedance value of the output impedance is half of the impedance value of the first input impedance.
3. A signal processing method applied to a digital video conversion apparatus, the signal processing method comprising:
receiving a combined signal transmitted by satellite signal receiving equipment;
separating the combined signal to obtain a satellite positioning signal and a satellite television signal;
analyzing the satellite positioning signal to obtain the position information of the current position;
and processing the satellite television signal according to the position information.
4. The method of claim 3, wherein said separating the combined signal to obtain a satellite positioning signal and a satellite television signal comprises:
inputting the combined signal to a preset power dividing circuit, where the power dividing circuit includes a first output interface and a second output interface, each device on a first path corresponding to the first output interface constitutes a first filter, each device on a second path corresponding to the second output interface constitutes a second filter, and a cutoff frequency of the first filter is greater than a cutoff frequency of the second filter;
separating the combined signal through the power dividing circuit;
receiving satellite positioning signals output via the first output interface, and receiving satellite television signals output via the second output interface.
5. The method of claim 3 or 4, wherein said processing the satellite television signals based on the location information comprises:
judging whether a position point corresponding to the position information is located in a preset position range or not;
if the position point corresponding to the position information is located in a preset position range, locking the received satellite television signal;
and if the position point corresponding to the position information is not in the preset position range, demodulating the satellite television signal and outputting a television program corresponding to the satellite television signal.
6. The method of claim 5, wherein the location information includes latitude and longitude information, and the determining whether the location point corresponding to the location information is located within a preset location range includes:
determining a target position point according to the longitude and latitude information of the current position;
matching the target position point with a plurality of position points in preset map data;
if the position point which is the same as the target position point is matched in the map data, the position point corresponding to the position information is judged to be positioned in a preset position range; otherwise, judging that the position point corresponding to the position information is not in a preset position range.
7. The method of claim 5, wherein demodulating the satellite television signal and outputting the television program corresponding to the satellite television signal comprises:
carrying out frequency conversion on the satellite television signal to obtain an intermediate frequency signal meeting the receiving frequency band requirement of the digital video conversion equipment;
and processing the intermediate frequency signal and outputting a television program corresponding to the intermediate frequency signal.
8. A signal processing apparatus, applied to a digital video conversion device, comprising:
the combined signal receiving module is used for receiving the combined signal transmitted by the satellite signal receiving equipment;
the combined signal separation module is used for separating the combined signal to obtain a satellite positioning signal and a satellite television signal;
the positioning module is used for analyzing the satellite positioning signal to obtain the position information of the current position;
and the satellite television signal processing module is used for processing the satellite television signal according to the position information.
9. A digital video conversion device comprising a memory, a processor and a computer program stored in said memory and executable on said processor, characterized in that said processor implements the signal processing method according to any one of claims 3 to 7 when executing said computer program.
10. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, implements the signal processing method according to any one of claims 3 to 7.
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