CN108650438B - Digital television front-end host and digital signal conversion system - Google Patents
Digital television front-end host and digital signal conversion system Download PDFInfo
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- CN108650438B CN108650438B CN201810737143.9A CN201810737143A CN108650438B CN 108650438 B CN108650438 B CN 108650438B CN 201810737143 A CN201810737143 A CN 201810737143A CN 108650438 B CN108650438 B CN 108650438B
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- 238000006243 chemical reaction Methods 0.000 title claims description 11
- 230000005540 biological transmission Effects 0.000 claims abstract description 38
- 238000004806 packaging method and process Methods 0.000 claims abstract description 31
- 238000004891 communication Methods 0.000 claims abstract description 13
- 238000012545 processing Methods 0.000 claims description 39
- 238000001816 cooling Methods 0.000 claims description 14
- 238000010586 diagram Methods 0.000 description 5
- 238000011161 development Methods 0.000 description 4
- 239000011111 cardboard Substances 0.000 description 2
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- 230000008054 signal transmission Effects 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
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Abstract
The application provides a digital television front-end host, which comprises a main board and a shell, wherein a signal management circuit, an audio and video transmission circuit, a control communication circuit and an expansion interface are arranged on the main board; the multifunctional digital multimedia broadcasting system further comprises a plurality of function plugboards which are correspondingly connected with the expansion interfaces and detachably connected with the host card slots, wherein the function plugboards comprise a plurality of input packaging boards which are correspondingly used for receiving different signal sources and packaging into IP streaming media signals and output analysis boards which are correspondingly used for outputting the different signal sources, and the signal management circuit and the audio/video transmission circuit are further connected with the control communication circuit. The application provides a digital television front-end host which can customize functions of a functional plugboard according to requirements, integrates a plurality of clamping grooves for clamping the functional plugboard, and can automatically match the digital television front-end host by connecting the functional plugboard with the clamping grooves and an expansion interface, thereby being convenient for unified management and wiring, receiving different types of input digital signals and outputting the input digital signals into a required signal form through packaging and analysis operations.
Description
Technical Field
The invention belongs to the technical field of electronic communication, and particularly relates to a digital television front-end host and a digital signal conversion system.
Background
The sources of the signal programs of the front end of the existing domestic and foreign digital televisions are as follows: HDMI high definition signals, CVBS standard definition signals, IP television signals, DVB-S/S2 satellite television signals, ASI signals, scrambling signals, DVBT/T2 television signals, DTMB television signals, ATSC television signals, DVBC (J.83A) television signals, DVBC (J.83B) television signals, ISDB-T television signals, and the like. The signal output of the front end of the existing domestic and foreign digital television is as follows: IP television signals, DVBT/T2 television signals, DTMB television signals, ATSC television signals, DVBC (j.83 a) television signals, DVBC (j.83 b) television signals, ISDB-T television signals, etc. Therefore, along with the development and popularization of digital televisions, various digital television signal modes coexist to become a trend of digital television technology development, and due to various input and output digital television signals, unified management and expansion are not facilitated, and the existing digital television front-end host often has the problems of difficult wiring and space occupation due to the redundancy of connecting wires, so that urgent demands are put forward on the television front-end host which can provide various receiving and analyzing modes and has a simple structure.
Disclosure of Invention
In order to solve the technical problems, the invention provides a digital television front-end host, which comprises a main board and a shell, wherein a signal management circuit, an audio and video transmission circuit, a control communication circuit and an expansion interface are arranged on the main board; the multifunctional card comprises a plurality of functional cards which are connected with the host in a clamping way, wherein each functional card comprises a plurality of input packaging boards which are correspondingly used for receiving different signal sources and packaging the different signal sources into a certain signal format, and an output analysis board which is correspondingly used for outputting the different signal sources, and the signal management circuit and the audio/video transmission circuit are further connected with the control communication circuit.
Preferably, the input package board comprises a signal receiving and processing module, a signal packaging module and a first data processing module, wherein an input signal is respectively connected with the first data processing module through the signal receiving and processing module and the signal packaging module, a plurality of digital signal receiving seats connected with the signal receiving and processing module are arranged on the outer side of the input package board, and a connecting seat used for connecting with a host expansion interface is arranged on the inner side of the input package board.
Preferably, the signal management circuit is a hundred mega network circuit, the first data processing module is connected with the signal management circuit through a hundred mega network interface, the audio/video transmission circuit is a giga network circuit, and the signal packaging module is connected with the audio/video transmission circuit through a giga network interface.
Preferably, the output analysis board is provided with a signal output processing module, a signal analysis module and a second data processing module, the output signal is respectively connected with the second data processing module through the signal output processing module and the signal analysis module, the outer side of the output analysis board is provided with a plurality of digital signal output seats connected with the signal output processing module, and the inner side of the output analysis board is provided with a connecting seat for connecting with a host expansion interface.
Preferably, the signal management circuit is a hundred mega network circuit, the second data processing module is connected with the signal management circuit through a hundred mega network interface, the audio/video transmission circuit is a giga network circuit, and the signal analysis module is connected with the audio/video transmission circuit through a giga network interface.
Preferably, the input package board is used for packaging each path of input signal source into a standard IP streaming media signal, and the input signal source comprises any one or two or more combination input forms of HDMI, CVBS, DTMB, DVBC, ASI or ISDB.
Preferably, the output analysis board is used for decoding and outputting a single signal source into any signal output form including DVB, DTMB, ATSC, DVBC, ISDB.
Preferably, the host comprises a top plate, a bottom plate, side plates, a panel and a back plate, wherein the main plate is arranged on the inner side of the back plate, and the inner side of the functional plugboard is correspondingly connected with the main plate expansion interface and is detachably connected with the panel of the host on the outer side.
Preferably, a plurality of cooling fan blades are fixedly arranged in the host, the functional plugboard is provided with holes for adapting to the heights and widths of the fan blades, and the cooling fan blades are arranged in the accommodating space formed by the arrangement of the holes.
Preferably, the top plate and the bottom plate are correspondingly provided with sliding rails for slidably connecting the functional plugboards, and the functional plugboards extend out of the top plate and the bottom plate respectively to form limit convex strips of the adaptive sliding rails, so that the functional plugboards can be clamped with the sliding rails through the limit convex strips and can slide along the sliding rail direction freely.
The invention also provides a digital signal conversion system, which also comprises mobile electronic equipment and a PC end, wherein the control communication circuit further comprises a WiFi module for connecting the mobile electronic equipment with a host computer for conversion operation, and the PC end is connected with the host computer through a signal management circuit.
The invention provides a digital television front-end host and a digital signal conversion system, which have the following beneficial effects:
① The host integrates a plurality of clamping grooves for clamping the functional plugboards, and the functional plugboards are connected into the clamping grooves and are connected with the expansion interfaces to automatically match with the host at the front end of the digital television, so that unified management and wiring are facilitated.
② The application provides a digital television front-end host which can customize the function of a functional plugboard according to the needs, can receive different types of input digital signals, and outputs the input digital signals into a required signal form through packaging and analysis operation, so that the digital television front-end host can receive digital television signals of different countries and convert the digital television signals into a signal source docking television playing device in the required form of the country.
③ The input package board can package different types of input signals into a unified streaming media signal format, the output analysis board can uniformly dispatch the streaming media signals on the output analysis board by the host to be converted into target type signal output, the input package board and the output analysis board are connected to a signal management circuit and an audio/video transmission circuit of the host at the front end of the digital television through the expansion interface, the audio/video transmission circuit is used for realizing the transmission of the streaming media signals between the input package board and the output analysis board, and the signal management circuit is used for managing and calling different input package boards or different output analysis boards according to the type of an inflow signal source and the type of a required output signal source. The audio/video transmission circuit and the signal management circuit can realize the selection and free switching of the input signal and the output signal according to the requirement.
④ The signal management circuit is a hundred-meganetwork circuit, the audio and video transmission circuit is a giga network circuit, the hundred-megaswitch circuit is used as a channel for calling and reading and writing management software and a mobile phone APP software management function plugboard, and the giga switch circuit is used as a channel for audio and video data transmission, and the two channels are separated so that the data of the management channel can not influence the streaming media data transmission to cause phenomena such as video unsmooth or blocking.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic perspective view of a front-end host of a digital television;
FIG. 2 is a schematic circuit diagram of a front-end host of a digital television;
FIG. 3 is a schematic circuit diagram of an input package board;
FIG. 4 is a schematic circuit diagram of an output analysis board;
FIG. 5 is a schematic diagram of the internal structure of the front-end host of the digital TV;
fig. 6 is a schematic structural diagram of an input package board of a digital tv front-end host.
1: A main board; 2: a functional plugboard; 21: inputting a packaging plate; 22: outputting a analysis plate; 3: a back plate; 4: a slide rail; 5: limit raised strips; 6: cooling fan blades; 7: the clamping strip.
Detailed Description
Example 1:
along with the development and popularization of digital televisions, a plurality of digital television signal modes coexist to become a trend of digital television technology development, and as the input and output digital television signals are various and are unfavorable for unified management and expansion, the existing digital television front-end host often has the problems of difficult wiring and space occupation due to the redundancy of connecting wires, so that urgent demands are put forward on the television front-end host which can provide a plurality of receiving analysis modes and has a simple structure.
The sources of the signal programs of the front end of the existing domestic and foreign digital televisions are as follows: HDMI high definition signals, CVBS standard definition signals, IP television signals, DVB-S/S2 satellite television signals, ASI signals, scrambling signals, DVBT/T2 television signals, DTMB television signals, ATSC television signals, DVBC (J.83A) television signals, DVBC (J.83B) television signals, ISDB-T television signals, and the like. The signal output of the front end of the existing domestic and foreign digital television is as follows: IP television signals, DVBT/T2 television signals, DTMB television signals, ATSC television signals, DVBC (j.83 a) television signals, DVBC (j.83 b) television signals, ISDB-T television signals, etc. The application provides a digital television front-end host capable of customizing function plugboard functions according to requirements, which is shown in fig. 1 and comprises a main board 1 and a shell, wherein a signal management circuit, an audio/video transmission circuit, a control communication circuit and an expansion interface are arranged on the main board 1; the multifunctional card further comprises a plurality of functional card boards 2 which are clamped in the host card slots, wherein each functional card board 2 comprises a plurality of input package boards 21 which correspondingly receive different signal sources and are packaged into a certain signal format and an output analysis board 22 which is used for correspondingly outputting different signal sources, each expansion interface comprises a signal management circuit interface and an audio/video transmission interface, each input package board 21 and each output analysis board 22 are connected to the corresponding signal management circuit and the corresponding audio/video transmission circuit through the corresponding host expansion interface, and each signal management circuit, each audio/video transmission circuit and each input package board 21 are further connected with the corresponding control communication circuit. The digital television front-end host provided by the application can receive digital television signals in different forms, and convert the digital television signals into signal sources in forms required by the places so as to be in butt joint with local television playing equipment; on the other hand, the host is provided with a clamping groove, and the input packaging plate 21 can be connected into the clamping groove to automatically match with the host at the front end of the digital television, so that the host is convenient to uniformly manage, wiring is not needed in the host, and the host structure is rationalized. In addition, the functional plugboard can also comprise a power plugboard, and the power plugboard is connected with the main board, the input packaging board and the output analysis board and is used for supplying power to the host and the functional plugboard.
Specifically, as shown in fig. 3, a signal receiving processing module, a signal packaging module and a first data processing module are disposed on the input packaging board 21, an input signal is respectively connected to the first data processing module through the signal receiving processing module and the signal packaging module, a digital television signal flows into a certain input packaging board 21, is received by the signal receiving processing module and is packaged into an IP streaming media signal by the signal packaging module, and information and processing parameters of the input signal can be read and written by the first data processing module. In this embodiment, the input package board 21 is used for packaging each path of input signal source into a standard IP streaming media signal, where the input signal source includes any one or two or more combination input forms of HDMI, CVBS, DTMB, DVBC, ASI or ISDB.
Specifically, as shown in fig. 4, the output analysis board 22 is provided with a signal output processing module, a signal analysis module and a second data processing module, the output signals are respectively connected with the second data processing module through the signal output processing module and the signal analysis module, after the packaged IP streaming media signal is received by a certain output analysis board 22, the IP streaming media signal is analyzed into a required audio/video digital signal to be connected to the television playing device in an adapting way, and the information and the processing parameters of the output signals can be read and written through the second data processing module. The output analysis board 22 is used to decode and output a single signal source into any signal output form including DVB, DTMB, ATSC, DVBC, ISDB. The input package board and the output analysis board 22 are provided with a plurality of digital signal transmission seats on the outer sides, each transmission seat comprises a receiving seat which is arranged on the input package seat and used for receiving digital signals to enter a host machine, and an output seat which is arranged on the output analysis seat and used for transmitting the digital signals to television playing equipment, a connecting seat which is used for connecting with an expansion interface of the host machine is arranged on the inner side of the functional plugboard 2, and each transmission seat comprises an F seat, an HDMI seat and the like. In this embodiment, the host selects the HDMI base as the signal input interface for inputting multi-channel high-definition signals, or selects the F base as the input interface for inputting multi-channel satellite signals, multi-channel cable television coaxial signals, or the output interface for outputting multi-channel cable television coaxial signals.
As shown in fig. 3-4, to rationalize configuration and further optimize host performance, the signal management circuit is a hundred mega network circuit, the first data processing module and the second data processing module are respectively connected with the signal management circuit through hundred mega network interfaces, the audio/video transmission circuit is a giga network circuit, and the signal packaging module and the signal analysis module are respectively connected with the audio/video transmission circuit through the giga network interfaces. Therefore, the hundred mega switching circuit in the embodiment can be used as a channel for calling and reading and writing management software and a mobile phone APP software management function plugboard, and the giga switching circuit is used as a channel for transmitting audio and video data, and the two channels are separated so that the data of the management channel cannot influence the streaming media data transmission to cause phenomena such as video unsmooth or clamping.
With reference to fig. 1-4, the host computer builds an expansion interface corresponding to the functional plugboards 2 one by one, wherein the expansion interface comprises a channel for supplying power to the functional plugboards 2, a hundred mega exchange communication channel for managing parameters related to the functional plugboards 2, and a giga exchange channel for outputting and receiving audio and video signals between the functional plugboards 2. The input package board can package different types of input signals into a unified streaming media signal format, the output analysis board can uniformly dispatch the streaming media signals on the output analysis board to be converted into target types of signal output, the input package board and the output analysis board are connected to a signal management circuit and an audio/video transmission circuit of a host at the front end of the digital television through expansion interfaces, the audio/video transmission circuit is connected with the input package board and the output analysis board through gigabit networks, the gigabit networks of the interfaces of the input package board and the output analysis board are connected with the streaming media signals together, and the streaming media signal transmission between the input package board and the output analysis board is realized. The audio/video transmission circuit and the signal management circuit can realize the selection and free switching of the input signal and the output signal according to the requirement.
Specifically, when a digital signal is selected to be received by a person, the host computer receives a related instruction, and the digital signal is packaged into a streaming media signal by selecting a specific input package board, when the streaming media signal is output to an expansion interface by a multicast mode by the specific input package board, and is transmitted to an audio and video transmission circuit by a gigabit network. Among these, the multicast technique is to construct a network with multicast capability, which allows routers to copy data packets onto multiple channels at once. By adopting the multicast mode, a single server can simultaneously send continuous data streams to hundreds of thousands of clients without delay. The media server only needs to send one information packet; all clients sending requests share the same information packet, so that information can be sent to clients with any addresses, the total amount of the information packets transmitted on a network can be reduced, the network utilization efficiency is improved, and the cost is reduced. Because multicast overcomes the weakness of unicast and broadcast transmission modes, multiple copies of a data packet are not duplicated to be transmitted to a network, and the data packet is not transmitted to clients which do not need the data packet, the minimum bandwidth occupied by multimedia application on the network is ensured.
The following table lists one embodiment of the functional plugboard arrangement when the host receives domestic digital television signals, in other embodiments, the functional plugboard can select one or more combinations according to requirements (such as changing domestic modulation signals, and customizing the corresponding functional plugboard), and the number of the functional plugboards can be customized according to the requirements of customers on signal quality.
If the customer needs to receive the foreign digital television signal in China, the host computer can correspondingly insert an input packaging board capable of packaging the corresponding digital television signal according to the requirement, and the following table is one embodiment of a functional plugboard to which the foreign digital television signal needs to be received when the digital television signal is used in China.
| Type(s) | Input/output | Function of | Signal country |
| HDMI | Input device | HDMI signal is packaged into IP stream media signal | Domestic common signal |
| Satellite | Input device | Satellite signal is packaged into IP stream media signal | Domestic common signal |
| ATSC | Input device | ATSC signal encapsulation as IP streaming media signal | Foreign common signals |
| ASI | Input device | ASI signal is packaged into IP stream media signal | Foreign common signals |
| DVBT | Output of | Parsing IP streaming media signal into DVBT signal | Domestic common signal |
| DTMB | Output of | Parsing of IP streaming media signal into DTMB signal | Domestic common signal |
In other embodiments, the type of input package board can be customized to the foreign signal source that it is desired to receive.
Example 2:
In order to further rationalize the host structure, this embodiment provides a digital television front-end host on the basis of embodiment 1, as shown in fig. 1 and 5, including a top plate, a bottom plate, a side plate and a back plate 3, the main plate 1 is disposed inside the back plate 3, and the functional plugboard 2 is slidably connected to the host and detachably connected to the main plate 1 of the host. In this embodiment, the top plate and the bottom plate are correspondingly provided with the sliding rails 4 for slidably connecting the functional plugboards, and the functional plugboards 2 respectively extend out of the top plate and the bottom plate to form a spacing protruding strip 5 adapted to the sliding rails 4, so that the functional plugboards 2 can be clamped with the sliding rails 4 through the spacing protruding strips 5 and freely slide along the direction of the sliding rails 4. The top plate slide rail 4 is further provided with a soft arched clamping strip 7, and the clamping strip 7 is engaged with the functional insert plate 2 and clamps the functional insert plate in the vertical direction by deformation when the functional insert plate 2 is in a preset insertion position.
As shown in fig. 5-6, a plurality of cooling fan blades 6 are fixedly arranged in the host, openings for adapting to the heights and widths of the fan blades are formed in the input packaging plate 21 and the output analysis plate 22, and the cooling fan blades 6 are arranged in the accommodating space formed by the arrangement of the openings. In this embodiment, the cooling fan blade 6 is fixedly connected to the top plate of the host computer near one side of the main board 1, a rectangular opening is arranged above the connection position of the main board 1 on the input package board 21 and the output analysis board 22, the height and width of the opening are matched with those of the fan blade, and the input package board 21 and the output analysis board 22 are uniformly distributed and connected to the host computer, so that the opening forms a containing space for installing the cooling fan blade 6, the cooling fan blade 6 is located above the connection position of the plugboard and the main board 1, and during normal operation, the cooling fan blade 6 can make wind to take away heat of the connection position Yu Cheng, thereby avoiding overheating of the circuit and loss of the host computer. In order to further improve the cooling effect, in this embodiment, the cooling fan blade 6 is provided with a plurality of ventilation holes on the opposite side bottom plate, and the plugboards are not closely arranged, and the plugboards are separated by 1-2cm from each other, so that air convection and an air channel are formed inside the host when the fan blade is opened, and cooling is accelerated.
Example 3:
On the basis of embodiment 1, this embodiment further provides a signal conversion system, which includes a digital television front-end host, a mobile electronic device and a PC end, where the control communication circuit further includes a WiFi module for connecting the mobile electronic device to the control host for conversion operation, and the PC end is connected to the host through a signal management circuit.
The digital television front-end host and the digital signal conversion system provided by the invention are described in detail, and specific examples are applied to illustrate the principle and the implementation of the invention, and the description of the above examples is only used for helping to understand the core idea of the invention; also, as will be apparent to those skilled in the art in light of the present teachings, the present disclosure should not be limited to the specific embodiments and applications described herein.
Claims (8)
1. The digital television front-end host is characterized by comprising a main board and a shell, wherein a signal management circuit, an audio and video transmission circuit, a control communication circuit and an expansion interface are arranged on the main board; the function plugboard comprises a plurality of input packaging boards which are correspondingly used for receiving different signal sources and packaging into IP streaming media signals, and output analysis boards which are correspondingly used for outputting different signal sources, and the signal management circuit and the audio/video transmission circuit are further connected with the control communication circuit;
the input packaging board comprises a signal receiving and processing module, a signal packaging module and a first data processing module, wherein an input signal is respectively connected with the first data processing module through the signal receiving and processing module and the signal packaging module, a plurality of digital signal receiving seats connected with the signal receiving and processing module are arranged on the outer side of the input packaging board, and a connecting seat used for connecting a host expansion interface is arranged on the inner side of the input packaging board;
the output analysis board is provided with a signal output processing module, a signal analysis module and a second data processing module, the output signals are respectively connected with the second data processing module through the signal output processing module and the signal analysis module, the outer side of the output analysis board is provided with a plurality of digital signal output seats connected with the signal output processing module, and the inner side of the output analysis board is provided with a connecting seat for connecting with a host expansion interface;
The input package board can package different types of input signals into a unified streaming media signal format, the output analysis board can uniformly schedule the host computer to the streaming media signals on the output analysis board to be converted into target type signal output, the input package board and the output analysis board are connected to a signal management circuit and an audio/video transmission circuit of the digital television front-end host computer through the expansion interface, the audio/video transmission circuit is used for realizing the transmission of the streaming media signals between the input package board and the output analysis board, and the signal management circuit is used for managing and calling different input package boards or different output analysis boards according to the type of inflow signal sources and the type of required output signal sources.
2. The digital television front-end host of claim 1, wherein the signal management circuit is a hundred meganetwork circuit, the first data processing module is connected to the signal management circuit through a hundred meganetwork interface, the audio/video transmission circuit is a gigabit network circuit, and the signal packaging module is connected to the audio/video transmission circuit through a gigabit network interface.
3. The digital television front-end host of claim 1, wherein the signal management circuit is a hundred meganetwork circuit, the second data processing module is connected to the signal management circuit through a hundred meganetwork interface, the audio/video transmission circuit is a gigabit network circuit, and the signal analysis module is connected to the audio/video transmission circuit through a gigabit network interface.
4. The digital television front-end host of claim 1, wherein the input package board is configured to package each input signal source into a standard IP streaming media signal, and the input signal source includes any one or a combination of two or more of HDMI, CVBS, DTMB, DVBC, ASI and ISDB input forms.
5. The digital television front-end host of claim 1, wherein the output parsing board is configured to decode and output a single signal source into any signal output form including DVB, DTMB, ATSC, DVBC, ISDB.
6. The digital television front-end host of claim 1, wherein the host comprises a top plate, a bottom plate, side plates, a panel and a back plate, the main plate is arranged on the inner side of the back plate, the host clamping grooves are correspondingly provided with sliding rails for slidably connecting the functional plugboards on the top plate and the bottom plate, the sliding rails are arranged in parallel and extend from the host panel to the back plate, and the functional plugboards extend to the top plate and the bottom plate respectively to form a limit convex strip adapting to the sliding rails, so that the functional plugboards can be clamped with the sliding rails through the limit convex strips and can slide freely along the sliding rail direction.
7. The digital television front-end host of claim 6, wherein a plurality of cooling fan blades are fixedly arranged in the host, the functional plugboard is provided with holes for adapting to the heights and the widths of the fan blades, and the cooling fan blades are arranged in the accommodating space formed by the arrangement of the holes.
8. The digital signal conversion system is characterized by comprising the digital television front-end host according to any one of claims 1-7, mobile electronic equipment and a PC end, wherein the control communication circuit further comprises a WiFi module for connecting the mobile electronic equipment with the host for controlling the conversion operation, and the PC end is connected with the host through a signal management circuit.
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| CN201810737143.9A CN108650438B (en) | 2018-07-06 | 2018-07-06 | Digital television front-end host and digital signal conversion system |
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| CN201810737143.9A CN108650438B (en) | 2018-07-06 | 2018-07-06 | Digital television front-end host and digital signal conversion system |
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