CN107948701A - A kind of intelligent transmitting device for digital television signal transmission - Google Patents
A kind of intelligent transmitting device for digital television signal transmission Download PDFInfo
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- CN107948701A CN107948701A CN201711176515.7A CN201711176515A CN107948701A CN 107948701 A CN107948701 A CN 107948701A CN 201711176515 A CN201711176515 A CN 201711176515A CN 107948701 A CN107948701 A CN 107948701A
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- digital television
- transmitting device
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- 230000008054 signal transmission Effects 0.000 title claims abstract description 20
- 238000012545 processing Methods 0.000 claims abstract description 44
- 238000013500 data storage Methods 0.000 claims abstract description 11
- 210000000352 storage cell Anatomy 0.000 claims abstract description 11
- 230000005540 biological transmission Effects 0.000 claims description 12
- 102100021711 Ileal sodium/bile acid cotransporter Human genes 0.000 claims description 4
- 101710156096 Ileal sodium/bile acid cotransporter Proteins 0.000 claims description 4
- 239000000284 extract Substances 0.000 claims description 4
- 102100023941 G-protein-signaling modulator 2 Human genes 0.000 description 7
- 101000904754 Homo sapiens G-protein-signaling modulator 2 Proteins 0.000 description 7
- 238000013461 design Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 241001269238 Data Species 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000006855 networking Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/426—Internal components of the client ; Characteristics thereof
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
- H04N21/4343—Extraction or processing of packetized elementary streams [PES]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
- H04N21/4382—Demodulation or channel decoding, e.g. QPSK demodulation
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention discloses a kind of intelligent transmitting device for digital television signal transmission, including：Central processing unit, high frequency head unit, digital demodulator unit, USB converting units, data storage cell and wireless transmitter module for server end, and wireless receiving module and display terminal for client；The output terminal connection digital demodulator unit of the high frequency head unit, the output terminal connection USB converting units of the digital demodulator unit, the output terminal connection central processing unit of the USB converting units, the central processing unit connection data storage cell and wireless transmitter module, the output terminal connection display terminal of the wireless receiving module；The high frequency head unit receives digital radio signal, and changes into digital medium-frequency signal；Digital demodulator unit docks received digital medium-frequency signal and is demodulated processing；USB converting units are transferred to central processing unit by usb bus after digital demodulator unit is demodulated and are handled.
Description
Technical field
The present invention relates to digital TV technology, and in particular to a kind of intelligent transportation for digital television signal transmission
Device.
Background technology
DTV STB is integrated with high frequency head module, digital demodulating block, audio/video decoding module, image output mould
Block and central processing unit and necessary software, can receive digital television signal and decoded image is output to television set
On terminal presentation facilities such as (displays).
DTV STB can provide one in CVBS/YC/YPbPr/VGA/HDMI according to the hardware approach used
Kind or several output interfaces, terminal receiving device must also have corresponding input interface to receive simultaneously display of television programmes.
The intelligent terminal with display screen becomes more and more popular in recent years, including PC/ Intelligent flats/smart mobile phone etc. is various sets
Standby, these equipment possess certain multimedia processing capability, can provide the display effect of high quality, but these equipment are not
Support the audio and video input interface of the above, also can not just coordinate DTV STB to use.
The content of the invention
In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is that provide a kind of for numeral
The intelligent transmitting device of television signal transmission.Audio/video flow is decoded and is shown in using the multi-media processing unit of these equipment
On terminal screen.
The technical solution adopted by the present invention to solve the technical problems：
A kind of intelligent transmitting device for digital television signal transmission, it is characterised in that including：
Central processing unit, high frequency head unit, digital demodulator unit, USB converting units, data for server end
Storage unit and wireless transmitter module, and wireless receiving module and display terminal for client；The high frequency head unit
Output terminal connection digital demodulator unit, the digital demodulator unit output terminal connection USB converting units, the USB
The output terminal connection central processing unit of converting unit, the central processing unit connection data storage cell and wireless transmission mould
Block, carries out the transmission of data by wireless transmitter module and wireless receiving module between the server end and client, described
The output terminal connection display terminal of wireless receiving module；
The high frequency head unit receives digital radio signal, and changes into digital medium-frequency signal；Digital demodulator unit pair
The digital medium-frequency signal received is demodulated processing；USB converting units by digital demodulator unit demodulate after DTV
Transport stream is transformed into usb data frame and is transferred to central processing unit by usb bus and handled.
Further, the digital demodulation unit is to DVB-T/T2/C/S/S2, ATSC, ISBT, DTMB multiple digital television
Form is demodulated.
Further, the digital demodulator unit supports VSB/OFDM/QPSK/APSK/QAM forms.
Further, the central processing unit uses the framework that CPU+LINUX is combined, and data are obtained from usb bus
After carry out data processing.
Further, data processing is carried out after the acquisition data from usb bus, specifically included：Central processing unit root
Demultiplexing work is carried out to TS streams using demultiplexing module according to corresponding DTV specification, therefrom extracts the PES numbers of program
According to；Then IP bags are re-packaged into PES data and are transferred to client.
Further, the PES data include video PES, audio PES, data PES.
Further, the demultiplexing module further includes descrambling engine, the descrambling engine be used for the data of scrambling into
Row descrambling, supports the reception of encrypted digital television program.
Further, the output terminal connection display terminal of the wireless receiving module；Specifically include：Wireless receiving module connects
The audio, video data that server is sent is received, calls the audio/video decoding unit of current device to decode audio, video data, is solved
Data after code are output to display terminal and are shown.
Further, the high frequency head unit uses MXL608 chips, and the digital demodulator unit uses ATBM7812_
The chip of 7X7 models, the USB converting units use the chip of UTV007 models.
Further, the storage unit includes SDRAM and Flash, and wherein Flash uses MX25L6406EM21-12G
The chip of model, SDRAM use FBGA4_8X14.
The present invention has the following advantages compared with prior art：
The present invention uses separation design, and server is as transmitting terminal, and client is receiving terminal, using wireless transmission method
The transmission of data is carried out, server is acquired audio/video information by high frequency collecting unit, then passes through digital demodulator
Unit is demodulated into digital TV transmission stream to the audio/video information of use, can support parallel and serial input, be changed by USB
Digital TV transmission stream is converted to usb data frame and is transferred to central processing unit by usb bus and handled by unit, in
Central Processing Unit is combined using efficient CPU+LINUX, and data processing is carried out in main control unit again after obtaining data from usb bus.
Demultiplexing module also includes a descrambling engine, the data of scrambling can be descrambled, can support encrypted DTV
The reception of program.Various PES formatted datas after demultiplexing are Resealed into IP bags and are transmitted to receiving device by WIFI
In, this link realizes the key job that digital television signal is changed into general networking audio/video flow.Fully profit of the invention
With the multimedia processing capability and screen display of user's existing device, the cost of whole system is greatly reduced；It is easy to use,
It is small, it is low in energy consumption, coordinate mobile phone can outdoors, vehicle-mounted wait uses in environment.
Brief description of the drawings
Fig. 1 is a kind of intelligent transmitting device structure chart for digital television signal transmission provided by the invention；
Fig. 2 is the tuner element circuit structure chart provided by the invention；
Fig. 3 is the digital demodulator element circuit structure chart provided by the invention；
Fig. 4 is the SDRAM memory circuit structure diagram in the data storage cell provided by the invention；
Fig. 5 is the flash storage circuit structure diagram in the data storage cell provided by the invention.
Embodiment
The specific embodiment of the invention is described with reference to the accompanying drawings and embodiments：
Referring to Fig. 1, for a kind of intelligent transmitting device structure chart for digital television signal transmission provided by the invention；
As shown in Figure 1, a kind of intelligent transmitting device for digital television signal transmission, it is characterised in that including：For
Central processing unit, high frequency head unit, digital demodulator unit, USB converting units, data storage cell and the nothing of server end
Line transmitting module, and wireless receiving module and display terminal for client；The output terminal connection of the high frequency head unit
Digital demodulator unit, the digital demodulator unit output terminal connection USB converting units, the USB converting units it is defeated
Outlet connects central processing unit, the central processing unit connection data storage cell and wireless transmitter module, the service
The transmission of data, the wireless receiving module are carried out between device end and client by wireless transmitter module and wireless receiving module
Output terminal connection display terminal；
The high frequency head unit receives digital radio signal, and changes into digital medium-frequency signal；Digital demodulator unit pair
The digital medium-frequency signal received is demodulated processing；USB converting units by digital demodulator unit demodulate after DTV
Transport stream is transformed into usb data frame and is transferred to central processing unit by usb bus and handled.
In the embodiment of the present invention, digital demodulator unit uses the chip of ATBM7812_7X7 models, the digital demodulation
Unit is demodulated DVB-T/T2/C/S/S2, ATSC, ISBT, DTMB multiple digital television form.
Wherein digital demodulator unit supports VSB/OFDM/QPSK/APSK/QAM forms.
Central processing unit uses the framework that CPU+LINUX is combined, and is carried out after obtaining data from usb bus at data
Reason.
Data processing is carried out after wherein obtaining data from usb bus, is specifically included：Central processing unit is according to corresponding number
Word TV specification carries out demultiplexing work using demultiplexing module to TS streams, therefrom extracts the PES data of program；Then it is right
PES data are re-packaged into IP bags and are transferred to client.
In the embodiment of the present invention, the output terminal connection display terminal of wireless receiving module；Specifically include：Wireless receiving module
The audio, video data that server is sent is received, calls the audio/video decoding unit of current device to decode audio, video data,
Decoded data are output to display terminal and are shown.
The present invention uses separation design, and server is as transmitting terminal, and client is receiving terminal, using wireless transmission method
The transmission of data is carried out, server is acquired audio/video information by high frequency collecting unit, then passes through digital demodulator
Unit is demodulated into digital TV transmission stream to the audio/video information of use, can support parallel and serial input, be changed by USB
Digital TV transmission stream is converted to usb data frame and is transferred to central processing unit by usb bus and handled by unit, in
Central Processing Unit is combined using efficient CPU+LINUX, and data processing is carried out in main control unit again after obtaining data from usb bus.
Main control unit demultiplexes TS streams according to corresponding DTV specification (DEMUX) work, therefrom extracts the PES of program
Data (Packetized Elementary Streams (packet ES bags)), including video PES, audio PES, data PES.Solution
Multiplexing module also includes a descrambling engine, and the data of scrambling can be descrambled, and can support encrypted DTV section
Purpose receives.Various PES formatted datas after demultiplexing are Resealed into IP bags and are transmitted to by WIFI in receiving device,
This link realizes the key job that digital television signal is changed into general networking audio/video flow.This partial software is not existing
There is technology, be that the TS/ES data conversions of traditional DVB are sent to client into IP data (flow media data packet of HLS forms)
Software receives.
Received by the WIFI of intelligent terminal and multimedia decoding ability receives and displaying video programs.Digital solution
Device unit is adjusted to support the multiple digital television form such as DVB-T/T2/C/S/S2, ATSC, ISBT, DTMB.Client can adopt
With the terminal for supporting the multiple systems such as windows/linux/android/ios.
Tuner (high frequency head unit) receives digital radio signal, and changes into digital intermediate frequency (zero intermediate frequency) signal；
Demodulation (digital demodulator unit, Demod) docks received digital intermediate frequency (zero intermediate frequency) signal and is demodulated processing,
According to the DTV of different-format, include but not limited to following form：DVB-C/DVB-C/T2/DVB-S/S2、DTMB、
ATSC, ISDB, support VSB/OFDM/QPSK/APSK/QAM
Etc. various different modulating forms, independent Demod chips are used in the design, can flexibly support no number
Word TV format, suitable for different countries and regions.Compatible 4 kinds of Demod chips in whole design, support respectively DVB,
The digital television formats such as DTMB, ATSC and ISDB, Demod adaptively support modulation system, can support difference automatically
Modulation system.
A WIFI AP equipment is also integrated with main control unit, so various smart terminal products can pass through WIFI
It is connected to the present apparatus and obtains audio, video data.
Client supports the various mainstream operation systems such as android/ios/windows, receives what is sent from WIFI
Audio, video data, and the audio and video hardware decoding unit of current device is called to complete the decoding to audio, video data, after decoding
Data output be shown on the display unit of intelligent terminal,
Referring to Fig. 2 to Fig. 5, wherein Fig. 2 is the tuner element circuit structure chart provided by the invention；Fig. 3 is this hair
The digital demodulator element circuit structure chart of bright offer；Fig. 4 is in the data storage cell provided by the invention
SDRAM memory circuit structure diagram；Fig. 5 is the flash storage circuit knot in the data storage cell provided by the invention
Composition.
A kind of intelligent transmitting device for digital television signal transmission provided by the invention, wherein central processing unit are adopted
With CPU+LINUX frameworks, high frequency head unit uses MXL608 chips, and wherein CLK_OUT pins export CLK signal and give Demod cores
Piece, SDA pins and SCL pins are used to be connected with the SDA pins and SCL pins of tuner chips, RESET_N pins and tuner cores
The RST pins connection of piece, USB converting units use the chip of UTV007 models, and storage unit includes SDRAM and Flash, wherein
Flash uses the chip of MX25L6406EM21-12G models, and SDRAM uses FBGA4_8X14.
Data exchange process between client and server-side is as follows：
Client sends query facility node to server-side, and when server-side receives inquiry signal, facility information is returned
To client, client sends the request for establishing network connection, service termination to server-side after receiving the facility information of return
After receiving the request, the result of successful connection or connection failure is returned into client, client is carried out down according to returning the result
Single stepping, when returning the result to succeed, illustrates that network connection has been established, and client sends inquiry tuning result to service
Device, server respond the tuning result and tuning result are returned to client, and client, which is sent, obtains asking for SERVICE lists
Ask, server responds and returns to client SERVICE lists, after client receives SERVICE list return informations, sends
Request plays, and server-side returns to M3U8 data packets to client, completes data interaction.
The present invention takes full advantage of the multimedia processing capability and screen display of user's existing device, greatly reduces whole
The cost of system；It is easy to use, it is small, it is low in energy consumption, coordinate mobile phone can outdoors, vehicle-mounted wait uses in environment.
The preferred embodiment for the present invention is explained in detail above in conjunction with attached drawing, but the invention is not restricted to above-mentioned implementation
Mode, within the knowledge of a person skilled in the art, can also be on the premise of present inventive concept not be departed from
Make a variety of changes.
Many other changes and remodeling can be made by not departing from the spirit and scope of the present invention.It should be appreciated that the present invention is not
It is limited to specific embodiment, the scope of the present invention is defined by the following claims.
Claims (10)
- A kind of 1. intelligent transmitting device for digital television signal transmission, it is characterised in that including：For in server end Central Processing Unit, high frequency head unit, digital demodulator unit, USB converting units, data storage cell and wireless transmitter module, And wireless receiving module and display terminal for client；The output terminal connection digital demodulator list of the high frequency head unit Member, the output terminal connection USB converting units of the digital demodulator unit, the output terminal connection center of the USB converting units Processing unit, the central processing unit connection data storage cell and wireless transmitter module, the server end and client Between the transmission of data, the output terminal connection of the wireless receiving module are carried out by wireless transmitter module and wireless receiving module Display terminal；The high frequency head unit receives digital radio signal, and changes into digital medium-frequency signal；Digital demodulator unit is to receiving To digital medium-frequency signal be demodulated processing；USB converting units by digital demodulator unit demodulate after digital television transfer Circulation, which changes to usb data frame and is transferred to central processing unit by usb bus, to be handled.
- A kind of 2. intelligent transmitting device for digital television signal transmission according to claim 1, it is characterised in that institute Digital demodulation unit is stated to be demodulated DVB-T/T2/C/S/S2, ATSC, ISBT, DTMB multiple digital television form.
- A kind of 3. intelligent transmitting device for digital television signal transmission according to claim 1, it is characterised in that institute State digital demodulator unit and support VSB/OFDM/QPSK/APSK/QAM forms.
- A kind of 4. intelligent transmitting device for digital television signal transmission according to claim 1, it is characterised in that institute The framework that central processing unit uses CPU+LINUX to be combined is stated, data processing is carried out after obtaining data from usb bus.
- A kind of 5. intelligent transmitting device for digital television signal transmission according to claim 4, it is characterised in that institute State and carry out data processing after obtaining data from usb bus, specifically include：Central processing unit is according to corresponding DTV specification Demultiplexing work is carried out to TS streams using demultiplexing module, therefrom extracts the PES data of program；Then to PES data again It is encapsulated as IP bags and is transferred to client.
- A kind of 6. intelligent transmitting device for digital television signal transmission according to claim 5, it is characterised in that institute Stating PES data includes video PES, audio PES, data PES.
- A kind of 7. intelligent transmitting device for digital television signal transmission according to claim 5, it is characterised in that institute State demultiplexing module and further include descrambling engine, the descrambling engine is used to descramble the data of scrambling, supports encrypted number The reception of word TV programme.
- A kind of 8. intelligent transmitting device for digital television signal transmission according to claim 1, it is characterised in that institute State the output terminal connection display terminal of wireless receiving module；Specifically include：Wireless receiving module receives the sound that server is sent and regards Frequency evidence, calls the audio/video decoding unit of current device to decode audio, video data, decoded data are output to aobvious Show that terminal is shown.
- A kind of 9. intelligent transmitting device for digital television signal transmission according to claim 1, it is characterised in that institute State high frequency head unit and use MXL608 chips, the digital demodulator unit uses the chip of ATBM7812_7X7 models, described USB converting units use the chip of UTV007 models.
- A kind of 10. intelligent transmitting device for digital television signal transmission according to claim 1, it is characterised in that The storage unit includes SDRAM and Flash, and wherein Flash uses the chip of MX25L6406EM21-12G models, and SDRAM is adopted Use FBGA4_8X14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711176515.7A CN107948701A (en) | 2017-11-22 | 2017-11-22 | A kind of intelligent transmitting device for digital television signal transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711176515.7A CN107948701A (en) | 2017-11-22 | 2017-11-22 | A kind of intelligent transmitting device for digital television signal transmission |
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| Publication Number | Publication Date |
|---|---|
| CN107948701A true CN107948701A (en) | 2018-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711176515.7A Pending CN107948701A (en) | 2017-11-22 | 2017-11-22 | A kind of intelligent transmitting device for digital television signal transmission |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111459867A (en) * | 2020-02-28 | 2020-07-28 | 广州广哈通信股份有限公司 | Method, device, converter and storage medium for converting USB (Universal Serial bus) into SMI (SMI) |
-
2017
- 2017-11-22 CN CN201711176515.7A patent/CN107948701A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111459867A (en) * | 2020-02-28 | 2020-07-28 | 广州广哈通信股份有限公司 | Method, device, converter and storage medium for converting USB (Universal Serial bus) into SMI (SMI) |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180420 |
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| WD01 | Invention patent application deemed withdrawn after publication |