CN103731694A - Vehicle-mounted satellite television broadcasting system and method based on MOST network - Google Patents
Vehicle-mounted satellite television broadcasting system and method based on MOST network Download PDFInfo
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Abstract
The invention relates to the field of televisions, and discloses a vehicle-mounted satellite television broadcasting system based on an MOST network. The vehicle-mounted satellite television broadcasting system comprises a vehicle-mounted satellite antenna and vehicle-mounted televisions and further comprises satellite receiving set top boxes, an audio and video analog to digital converter, an MPEG board and an intelligent network interface controller, wherein all the satellite receiving set top boxes are used for receiving and demodulating television program signals respectively, the audio and video analog to digital converter is used for converting received television program audio and video analog signals into digital signals, the MPEG board is used for compressing the digital signals obtained through conversion of the audio and video analog to digital converter in real time and transmitting the digital signals to the intelligent network interface controller, the intelligent network interface controller is connected with the MOST network, and all the vehicle-mounted televisions are connected into the MOST network. Due to the adoption of the technology, the vehicle-mounted satellite television broadcasting system has the advantages of being simple in data processing and wiring, high in transmission efficiency, short in delay, stable in system, large in transmission bandwidth and the like.
Description
Technical field
The present invention relates to field of television, particularly a kind of Vehicular satellite television broadcasting system and method based on MOST network.
Background technology
On early stage automobile, be that any entertainment systems is not installed.Along with development and the growth in the living standard of electronic technology, vehicle audio has experienced several processes:
Nineteen twenty-four, Chevrolet has been manufactured first and has been equipped with wireless automobile, has opened the new epoch of automobile audio.
20 century 70s, vehicle audio has entered the cassette recorder epoch.
The eighties in 20th century, vehicle audio enters the CD player epoch.
The nineties in 20th century, vehicle audio has entered the DVD epoch.
After 2000, vehicle audio enters the navigation epoch.
Since 2007, a key navigation, the development of car networking, the gold period of vehicle mounted guidance being brought into high speed development, various factories, the vehicle mounted guidance of various brands is like the mushrooms after rain, in full flourish., there is blowout phenomenon in the vehicle mounted guidance product of compact car.
But thriving with respect to little vehicle, is directed to the vehicle audio of the bus vehicle of collective's transportation, always in lukewarm state.Bus vehicle audio generally has several at present:
1, DVD player+liquid crystal display mode: DVD video recording playing function is only provided.Single video source can only be provided.
2, hard disc player+liquid crystal display mode: be the upgrade version of such scheme, larger capacity can be provided, store more program.But also can only provide single video source.
3, satellite TV receiver+RF(Radio Frequency, radio frequency) repeater+7 cun television set.With respect to first two mode, there is the place of important breakthrough to be, this scheme provides the space of independently watching program can to each passenger, and every passenger all can select the program of oneself liking watching by TV tuner.And it is unnecessary with others a shared television set.The car audio system using with respect to car, the passenger on bus is more, and this scheme can provide certain personalized service.
Shortcoming: Set Top Box demodulation audio-video signal out need to be modulated into analog rf signal by multiplexer, hardware is complicated.Each television set need to connect an antenna and increase tuner module, and wiring is complicated, and cost is high.
Summary of the invention
In view of the above problems, it is a kind of based on MOST (Media Oriented System Transport that the first object of the embodiment of the present invention is to provide, system transmission towards media) the Vehicular satellite television broadcasting system of network, adopt this programme, by simple hardware structure and wiring, just can realize the stream transmission of television programme data, fairly simple to the processing of data, and efficiency of transmission is high, postpone little, system stability, transmission bandwidth is high.
The second object of the embodiment of the present invention is to provide a kind of Vehicular satellite television broadcasting method based on MOST network, adopt this programme, by simple step, just can realize the stream transmission of television programme data, processing to data is fairly simple, and efficiency of transmission is high, postpone little, system stability, transmission bandwidth is high.
A kind of Vehicular satellite television broadcasting system based on MOST network that the embodiment of the present invention provides, comprise vehicle-mounted satellite antenna, Autcmotive television, also comprise: set top box for satellite receiver, audio frequency and video ADC(Analog to Digital Converter, analog/digital converter) module, mpeg board, intelligent network interface controller, wherein
Described in each, set top box for satellite receiver is respectively used to receive and each TV programme signal of demodulation,
Described audio frequency and video ADC transducer is connected with set top box for satellite receiver described in each respectively, for the audio frequency and video analog signal of TV programme that set top box for satellite receiver described in each is received, is converted to digital signal,
Described mpeg board is connected with described audio frequency and video ADC transducer, for the digital signal after audio frequency and video ADC transducer conversion described in Real Time Compression, and is transferred to described intelligent network interface controller,
Described intelligent network interface controller is connected with described MOST network, for controlling the driving of described MOST network, and unified operation, management be connected with described MOST network each described in Autcmotive television,
Described in each, Autcmotive television is connected in described MOST network, for selecting to play TV programme described in each that transmit as a stream at described MOST network.
Alternatively, also comprise low noise frequency reducing amplifier, power divider, wherein,
Described low noise frequency reducing amplifier is connected with described vehicle-mounted satellite antenna, for the TV programme signal that described vehicle-mounted satellite antenna is received, amplifies and frequency reducing,
Described power divider is connected with described low noise frequency reducing amplifier and set top box for satellite receiver respectively, for the TV programme signal after described low noise frequency reducing amplifier amplification and frequency reducing is divided into at least two paths of signals output, each road signal is exported to a described set top box for satellite receiver being connected with described power divider.
Alternatively, TV programme quantity that the number of described set top box for satellite receiver is play as required determines, and presets the TV programme signal that set top box for satellite receiver need to receive described in each.
Alternatively, also comprise network interface or light joint, described intelligent network interface controller carries out communication by differential lines and described network interface or light joint, and described network interface or light joint are connected with described MOST network.
Alternatively, described audio frequency and video ADC transducer divides two parts:
Audio ADC transducer, for converting simulated audio signal to digital audio and video signals;
Video AD C transducer, for converting analog video signal to digital video signal.
Alternatively, described Autcmotive television comprises: intelligent network interface controller, CPU processor, display screen, DA(Digital to Analog, digital-to-analogue conversion) conversion chip, loud speaker and/or earphone, wherein,
Described intelligent network interface controller is connected with described CPU processor and described DA conversion chip respectively, for the corresponding described TV programme signal of transmitting as a stream at described MOST network being switched into described Autcmotive television according to the selected TV program information of input
Described intelligent network interface controller will switch video signal transmission into the described TV programme signal of described Autcmotive television to described CPU processor, described CPU processor is to described decoding video signal, by decoded described video signal transmission, give described display screen
Simultaneously, described intelligent network interface controller will switch audio signal transmission into the described TV programme signal of described Autcmotive television to described DA conversion chip, and described DA conversion chip is converted to simulated audio signal by described audio signal and exports to described loud speaker and/or earphone.
Alternatively, by touching described display screen, input selected TV program information and operation information.
A kind of Vehicular satellite television broadcasting method based on MOST network that the embodiment of the present invention provides, described method comprises:
Described in each, set top box for satellite receiver receives respectively and each TV programme signal of demodulation,
The audio frequency and video analog signal of the TV programme that each set top box for satellite receiver is received is converted to digital signal, and described digital signal is compressed, and is transferred to described MOST network,
TV programme signal described in each after compression is transmitted as a stream in described MOST network, select to play TV programme described in each of transmitting as a stream in described MOST network.
Alternatively, described in each set top box for satellite receiver receive respectively and each TV programme signal of demodulation before, also comprise:
The TV programme signal receiving is amplified and frequency reducing,
Described TV programme signal after amplification and frequency reducing is divided into at least two paths of signals output, and each road signal is exported to a set top box for satellite receiver.
Alternatively, TV programme quantity that the number of described set top box for satellite receiver is play as required determines, and presets the TV programme signal that set top box for satellite receiver need to receive described in each.
Therefore application the present embodiment technical scheme, due to by TV programme signal being carried out to real-time analog-to-digital conversion and compression transmission, makes MOST network can realize the stream transmission of television programme data, fairly simple to the processing of data.And MOST network is to utilize twisted-pair feeder, coaxial cable or fiber optic fibers, plastic as Information Conduction medium, realizes the transmission of synchronous or asynchronous digital signal, there is the feature of the efficient signal of stream transmission in time, and system stability, transmission bandwidth is high.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is a kind of Vehicular satellite television broadcasting system schematic diagram based on MOST network provided by the invention;
Fig. 2 is the Vehicular satellite television broadcasting system schematic diagram of another kind provided by the invention based on MOST network;
Fig. 3 is a kind of Autcmotive television structural representation provided by the invention;
Fig. 4 is the third Vehicular satellite television broadcasting system schematic diagram based on MOST network provided by the invention;
Fig. 5 is a kind of Vehicular satellite television broadcasting method flow chart based on MOST network provided by the invention;
Fig. 6 is the Vehicular satellite television broadcasting method flow chart of another kind provided by the invention based on MOST network.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
embodiment 1:
The present embodiment provides a kind of Vehicular satellite television broadcasting system based on MOST network, as shown in Figure 1, comprising: set top box for satellite receiver 02, audio frequency and video ADC transducer 03, mpeg board 04, intelligent network interface controller 05, Autcmotive television 06, wherein,
Described in each, set top box for satellite receiver 02 is respectively used to receive and each TV programme signal of demodulation.Vehicle-mounted satellite antenna is for receiving the TV programme signal of satellite, described vehicle-mounted satellite antenna possesses in mobile and locks specified satellite function, and in movement, the large capacity of high-frequency wideband transmits the multimedia messagess such as voice, data, dynamic image, fax incessantly in real time.The general Ku band satellite signal that receives, operating frequency is 10.7-12.7GHz.
Can be, but not limited to, the TV programme quantity that the number of described set top box for satellite receiver 02 is play is as required determined, and preset the TV programme signal that set top box for satellite receiver need to receive described in each, if the TV programme of encrypting needs to authorize.
Described audio frequency and video ADC transducer 03 is connected with set top box for satellite receiver described in each 02 respectively, audio frequency and video analog signal for TV programme that set top box for satellite receiver described in each 02 is received is converted to digital signal, can be, but not limited to, described audio frequency and video ADC transducer divides two parts: audio ADC transducer, for converting simulated audio signal to digital audio and video signals, for example, simulated audio signal is converted to digital I2S signal; Video AD C transducer, for converting analog video signal to digital video signal, for example, by analog video signal, such as CVBS signal (Composite Video Broadcast Signal, composite video broadcast singal), convert digital rgb signal or digital Ycbcr signal to.
Described mpeg board 04 is connected with described audio frequency and video ADC transducer 03, for the digital signal after 03 conversion of audio frequency and video ADC transducer described in Real Time Compression, and be transferred to described intelligent network interface controller 05, can be, but not limited to, described mpeg board is by two function compositions, and the one, by digital audio I2S signal, by MLB bus transfer, give described intelligent network interface controller 05; Be that digital video signal Real Time Compression is become to MPEG2/4 or signal H.264 in addition, then give described intelligent network interface controller 05 by MLB bus transfer.
Described intelligent network interface controller 05 is connected with described MOST network, for controlling the driving of described MOST network, and unified operation, management be connected with described MOST network each described in Autcmotive television 06.Can select described intelligent network interface controller 05 according to described MOST network used, be for example that MOST25, MOST50 or MOST150 network are selected described intelligent network interface controller 05 according to network used, such as MOST150 adopts OS81110.The quantity of described Autcmotive television 06 energy received television program depends on the described MOST network bandwidth.Described MOST network can be ring topology or Star topology etc.
Can be, but not limited to, as shown in Figure 2, the described Vehicular satellite television broadcasting system based on MOST network also comprises network interface or light joint 09, described intelligent network interface controller 05 carries out communication by differential lines and described network interface or light joint 09, and described network interface or light joint 09 are connected in described MOST network.
Described MOST network often adopts ring topology, and described in each, in-car TV 06 machine is connected in series in described MOST network, for selecting to play TV programme described in each that transmit as a stream at described MOST network.Described stream transmission mainly refers to by the technology general name of network transfer medium (as video, audio frequency).Stream transmission is the key technology that Streaming Media is realized.Streaming Media is not downloaded whole file before broadcasting, only deposits beginning content in internal memory, and the data flow of Streaming Media transmits at any time at any time and plays.
Can be, but not limited to, as shown in Figure 3, described Autcmotive television 06 comprises: intelligent network interface controller 061, CPU processor 062, DA conversion chip 063, display screen 064, loud speaker and/or earphone 065, wherein,
Described intelligent network interface controller 061 is connected with described CPU processor 062 and described DA conversion chip 063 respectively, for the corresponding described TV programme signal of transmitting as a stream at described MOST network being switched into described Autcmotive television 06 according to the selected TV program information of input
Described intelligent network interface controller 061 will switch video signal transmission into the described TV programme signal of described Autcmotive television 06 to described CPU processor 062,062 pair of described decoding video signal of described CPU processor, by decoded described video signal transmission, give described display screen 064
Simultaneously, described intelligent network interface controller 061 will switch audio signal transmission into the described TV programme signal of described Autcmotive television 06 to described DA conversion chip 063, and described DA conversion chip 063 is converted to simulated audio signal by described audio signal and exports to described loud speaker and/or earphone 065.
Can be, but not limited to, by touching the described display screen 064 selected TV program information of input and operation information.
Therefore the technical program provides the space of independently watching program can to each passenger, every passenger all can select the program of oneself liking watching, and unnecessary with others a shared television set.And described MOST network can be realized the stream transmission of television programme data, fairly simple to the processing of data.And MOST network is to utilize twisted-pair feeder, coaxial cable or fiber optic fibers, plastic as Information Conduction medium, normally ring topology, can be together in series maximum 64 nodes by cable, wiring is simple, the feature with the efficient signal of stream transmission in time, and system stability, transmission bandwidth is high.
embodiment 2:
The present embodiment provides a kind of Vehicular satellite television broadcasting system based on MOST network, and as shown in Figure 4, the difference of the present embodiment and embodiment 1 is, also comprises low noise frequency reducing amplifier 07, power divider 08, wherein,
Described low noise frequency reducing amplifier 07 is connected with described vehicle-mounted satellite antenna 01, and its function is that the TV programme signal that described vehicle-mounted satellite antenna 01 is received is amplified and frequency reducing, for example Ku or C-band signal is become to L-band.The workflow of described low noise frequency reducing amplifier 07 is exactly that the TV programme high-frequency signal first described vehicle-mounted satellite antenna 01 being received amplifies, recycling local oscillation circuit is converted to high-frequency signal intermediate frequency and amplifies again, be beneficial to coaxial cable and transmit TV programme signal described in described TV programme signal and set top box for satellite receiver demodulation, described intermediate frequency range is by the decision of described low noise frequency reducing amplifier 07 kind.
Described power divider 08 is connected with described low noise frequency reducing amplifier 07 and set top box for satellite receiver 02 respectively, for the TV programme signal after described low noise frequency reducing amplifier 07 amplification and frequency reducing is divided into at least two paths of signals output, each road signal is exported to a described set top box for satellite receiver 02 being connected with described power divider.Described power divider 08, on the basis of normal allocation device, has increased the function that signal amplifies, and output signal can not affect power output because of the increase of output way.
Therefore, the technical program, due to described TV programme signal is amplified and frequency reducing, is beneficial to TV programme signal described in transmission described TV programme signal and set top box for satellite receiver demodulation, and can the signal input of Ba Yi road be divided into multiple signals output, and not affect power output.
embodiment 3:
The present embodiment provides a kind of Vehicular satellite television broadcasting method based on MOST network, and as shown in Figure 5, described method comprises:
001, described in each, set top box for satellite receiver receives respectively and each TV programme signal of demodulation.
The audio frequency and video analog signal of the TV programme 002, each set top box for satellite receiver being received is converted to digital signal.
003, compress described digital signal, be transferred to described MOST network, make compression after each described in TV programme signal in described MOST network, transmit as a stream.
004, select to play TV programme described in each of transmitting as a stream in described MOST network.
Can be, but not limited to, TV programme quantity that the number of described set top box for satellite receiver is play as required determines, and presets the TV programme signal that set top box for satellite receiver need to receive described in each.
Therefore, application the present embodiment technical scheme, because MOST network can be realized the stream transmission of television programme data, fairly simple to the processing of data.And MOST network is to utilize twisted-pair feeder, coaxial cable or fiber optic fibers, plastic as Information Conduction medium, ring topology normally, maximum 64 nodes can be together in series by cable, realize the transmission of synchronous or asynchronous digital signal, the feature with the efficient signal of stream transmission in time, and system stability, transmission bandwidth is high.
embodiment 4:
The difference of the present embodiment and embodiment 3 is, as shown in Figure 6, method comprises:
001, vehicle-mounted satellite antenna received television program signal.
002, the TV programme signal receiving is amplified and frequency reducing.
003, the described TV programme signal after amplification and frequency reducing is divided into at least two paths of signals output, each road signal is exported to a set top box for satellite receiver.
004, described in each, set top box for satellite receiver receives respectively and each TV programme signal of demodulation.
The audio frequency and video analog signal of the TV programme 005, each set top box for satellite receiver being received is converted to digital signal.
006, compress described digital signal, be transferred to described MOST network, make compression after each described in TV programme signal in described MOST network, transmit as a stream.
007, select to play TV programme described in each of transmitting as a stream in described MOST network.
Therefore, due to described TV programme signal is amplified and frequency reducing, be beneficial to TV programme signal described in transmission described TV programme signal and set top box for satellite receiver demodulation, and can the signal input of Ba Yi road be divided into multiple signals output, and do not affect power output.
Above-described execution mode, does not form the restriction to this technical scheme protection range.The modification of doing within any spirit at above-mentioned execution mode and principle, be equal to and replace and improvement etc., within all should being included in the protection range of this technical scheme.
Claims (10)
1. the Vehicular satellite television broadcasting system based on MOST network, comprises vehicle-mounted satellite antenna, Autcmotive television, it is characterized in that, also comprises: set top box for satellite receiver, audio frequency and video ADC transducer, mpeg board, intelligent network interface controller, wherein,
Described in each, set top box for satellite receiver is respectively used to receive and each TV programme signal of demodulation,
Described audio frequency and video ADC transducer is connected with set top box for satellite receiver described in each respectively, for the audio frequency and video analog signal of TV programme that set top box for satellite receiver described in each is received, is converted to digital signal,
Described mpeg board is connected with described audio frequency and video ADC transducer, for the digital signal after audio frequency and video ADC transducer conversion described in Real Time Compression, and is transferred to described intelligent network interface controller,
Described intelligent network interface controller is connected with described MOST network, for controlling the driving of described MOST network, and unified operation, management be connected with described MOST network each described in Autcmotive television,
Described in each, Autcmotive television is connected in described MOST network, for selecting to play TV programme described in each that transmit as a stream at described MOST network.
2. the Vehicular satellite television broadcasting system based on MOST network as claimed in claim 1, is characterized in that, also comprises low noise frequency reducing amplifier, power divider, wherein,
Described low noise frequency reducing amplifier is connected with described vehicle-mounted satellite antenna, for the TV programme signal that described vehicle-mounted satellite antenna is received, amplifies and frequency reducing,
Described power divider is connected with described low noise frequency reducing amplifier and set top box for satellite receiver respectively, for the TV programme signal after described low noise frequency reducing amplifier amplification and frequency reducing is divided into at least two paths of signals output, each road signal is exported to a described set top box for satellite receiver being connected with described power divider.
3. the Vehicular satellite television broadcasting system based on MOST network as claimed in claim 1, it is characterized in that, TV programme quantity that the number of described set top box for satellite receiver is play as required determines, and presets the TV programme signal that set top box for satellite receiver need to receive described in each.
4. the Vehicular satellite television broadcasting system based on MOST network as claimed in claim 1, it is characterized in that, also comprise network interface or light joint, described intelligent network interface controller carries out communication by differential lines and described network interface or light joint, and described network interface or light joint are connected with described MOST network.
5. the Vehicular satellite television broadcasting system based on MOST network as claimed in claim 1, is characterized in that, described audio frequency and video ADC transducer divides two parts:
Audio ADC transducer, for converting simulated audio signal to digital audio and video signals;
Video AD C transducer, for converting analog video signal to digital video signal.
6. the Vehicular satellite television broadcasting system based on MOST network as claimed in claim 1, is characterized in that, described Autcmotive television comprises: intelligent network interface controller, CPU processor, display screen, DA conversion chip, loud speaker and/or earphone, wherein,
Described intelligent network interface controller is connected with described CPU processor and described DA conversion chip respectively, for the corresponding described TV programme signal of transmitting as a stream at described MOST network being switched into described Autcmotive television according to the selected TV program information of input
Described intelligent network interface controller will switch video signal transmission into the described TV programme signal of described Autcmotive television to described CPU processor, described CPU processor is to described decoding video signal, by decoded described video signal transmission, give described display screen
Simultaneously, described intelligent network interface controller will switch audio signal transmission into the described TV programme signal of described Autcmotive television to described DA conversion chip, and described DA conversion chip is converted to simulated audio signal by described audio signal and exports to described loud speaker and/or earphone.
7. a kind of Vehicular satellite television broadcasting system based on MOST network as claimed in claim 6, is characterized in that, by touching described display screen, inputs selected TV program information and operation information.
8. the Vehicular satellite television broadcasting method based on MOST network, is characterized in that, described method comprises:
Described in each, set top box for satellite receiver receives respectively and each TV programme signal of demodulation,
The audio frequency and video analog signal of the TV programme that each set top box for satellite receiver is received is converted to digital signal, and described digital signal is compressed, and is transferred to described MOST network,
TV programme signal described in each after compression is transmitted as a stream in described MOST network, select to play TV programme described in each of transmitting as a stream in described MOST network.
9. the Vehicular satellite television broadcasting method based on MOST network as claimed in claim 8, is characterized in that, described in each set top box for satellite receiver receive respectively and each TV programme signal of demodulation before, also comprise:
The TV programme signal receiving is amplified and frequency reducing,
Described TV programme signal after amplification and frequency reducing is divided into at least two paths of signals output, and each road signal is exported to a set top box for satellite receiver.
10. the Vehicular satellite television broadcasting method based on MOST network as claimed in claim 8, it is characterized in that, TV programme quantity that the number of described set top box for satellite receiver is play as required determines, and presets the TV programme signal that set top box for satellite receiver need to receive described in each.
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| CN103731694B (en) | 2018-05-01 |
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Effective date of registration: 20190411 Address after: 516006 Zhongkai Development Zone, Huizhou City, Guangdong Province Patentee after: Guangzhou JinDing Mobile Media Co., Ltd. Address before: 516006 Zhongkai Development Zone, Huizhou City, Guangdong Province Patentee before: Ye Shaogan |
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