CN113542837A - Multichannel broadcasting switcher - Google Patents
Multichannel broadcasting switcher Download PDFInfo
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- CN113542837A CN113542837A CN202010306083.2A CN202010306083A CN113542837A CN 113542837 A CN113542837 A CN 113542837A CN 202010306083 A CN202010306083 A CN 202010306083A CN 113542837 A CN113542837 A CN 113542837A
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- 230000006854 communication Effects 0.000 claims abstract description 55
- 238000004891 communication Methods 0.000 claims abstract description 55
- 238000012545 processing Methods 0.000 claims abstract description 31
- 238000006243 chemical reaction Methods 0.000 claims abstract description 26
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 4
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 4
- 238000012544 monitoring process Methods 0.000 claims description 11
- 230000005236 sound signal Effects 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 description 5
- 230000007175 bidirectional communication Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/61—Network physical structure; Signal processing
- H04N21/6106—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
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Abstract
The invention discloses a multi-channel broadcast switcher, which comprises a case, wherein an IP (Internet protocol) TS (transport stream) module, a TS serial-parallel conversion coding module, a DTMB (digital television broadcasting) tuning demodulation module, a satellite tuning demodulation module, an RDS (radio data system) radio frequency modulation demodulation module, a display panel, a fingerprint identification module, an FPGA (field programmable gate array) digital signal processing circuit, an STM32 singlechip control module, an emergency battery module, an audio and video decoding circuit, a DDS (direct digital synthesis) frequency conversion circuit, a gain adjustment circuit, a serial communication circuit, a network port communication circuit, an IP (Internet protocol) communication circuit and a 4G (fourth generation) communication circuit are arranged in the case. The invention can realize the simultaneous input of a plurality of different information sources and automatic selection. And the state information can be returned through the 4G module when the external power is cut off.
Description
Technical Field
The invention relates to a multi-channel broadcast switcher, in particular to a core device for ensuring the safe broadcast of a broadcast system by applying a multi-channel switching technology.
Background
In order to guarantee the quality of broadcast transmissions, various transmission channels are now available to ensure that information is conveyed to the terminal transmitter. In order to meet the requirement of multi-channel broadcast transmission, the invention provides a multi-channel broadcast switcher which is used as core equipment of a transmission link of a broadcast system, has various signal input ports and various remote monitoring modes, can cope with various transmission faults and greatly increases the security broadcast guarantee.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a multi-channel broadcast switcher, which can receive and execute instructions in various input signals and analyze corresponding data, realize the functions of IP to TS conversion, decoding, multiplexing, PID filtering, fast analysis of scheduling control instructions, RDS decoding modulation and the like by adopting an FPGA chip, and can communicate with a remote end through a 4G and a network port to realize state supervision and instruction issuing.
The present invention solves the above-mentioned problems with the following technical solutions.
The invention discloses a multi-channel broadcast switcher, which comprises a case, wherein an IP (Internet protocol) to TS (transport stream) conversion module 1, a TS serial-parallel conversion coding module 2, a DTMB (digital television broadcasting) tuning demodulation module 3, a satellite tuning demodulation module 4, an RDS (radio data service) radio frequency modulation receiving module 5, a display panel 6, an FPGA (field programmable gate array) digital signal processing circuit 7, an STM32 single-chip microcomputer control module 8, an analog audio switching circuit 9, a broadcast program decoding module 10, an audio and video decoding circuit 11, a DDS (direct digital synthesis) frequency conversion circuit 12, a gain adjusting circuit 13, a serial communication circuit 14, a network port communication circuit 15, an IP (Internet protocol) output circuit 16, a 4G (global) communication module 17, a fingerprint identification module 18 and an emergency battery module 19 are arranged in the case. IP signals are input into an IP-to-TS module 1, and are output to an FPGA digital signal processing circuit 7 after data conversion; TS stream data transmitted by a wire is input into a TS stream serial-parallel conversion coding module 2, and is output to an FPGA digital signal processing circuit 7 after serial-parallel conversion and coding; the DTMB radio frequency signal and the DVB-S/S2 satellite radio frequency signal are respectively input into a DTMB tuning demodulation module 3 and a satellite tuning demodulation module 4, and are output to an FPGA digital signal processing circuit 7 after being tuned and demodulated; the FPGA digital signal processing circuit 7 analyzes and demultiplexes the data and then respectively outputs two paths of TS flow signals to the broadcast program decoding module 10 and the audio and video decoding circuit 11; one path of signal is decoded by a broadcast program decoding module 10 and then output to an analog audio switching circuit 9; the other path of signal is decoded by an audio and video decoding circuit 11 and then outputs audio and video signals as monitoring signals respectively; the wireless frequency modulation signal is output to the analog audio frequency switching circuit 9 through the RDS wireless frequency modulation receiving module 5; the original broadcast sound signal is input to the analog audio switching circuit 9; the analog audio switching circuit 9 outputs an audio signal to the transmitter after signal switching.
The output end of the FPGA digital signal processing circuit 7 has a TS flow signal which is directly output to a DTMB transmitter, and also has an RDS baseband signal which is output to a DDS frequency conversion circuit 12, and the modulated signal is output to a gain adjusting circuit 13 for gain adjustment and then an RDS radio frequency signal is output.
The system comprises an IP-to-TS (transport stream) module 1, a DTMB (digital television broadcasting) tuning and demodulating module 3, a satellite tuning and demodulating module 4, an RDS (radio data system) radio frequency modulation receiving module 5, an FPGA (field programmable gate array) digital signal processing circuit 7, a broadcast program decoding module 10, an audio and video decoding circuit 11, a serial communication circuit 14, a network port communication circuit 15 and a 4G communication circuit 17, wherein the network port communication circuit 15 and the 4G communication circuit 17 are respectively connected with an STM32 singlechip control module 8 and realize bidirectional communication.
The output end of the STM32 single chip microcomputer control module 8 is respectively connected to the display panel 6, the analog audio switching circuit 9 and the IP
An output circuit 16.
The serial port communication circuit 14, the internet access communication circuit 15, the IP output circuit 16 and the 4G communication circuit respectively output a serial port communication signal, an internet access signal, an RDS signal and a 4G wireless communication signal.
The control module is a real-time monitoring system implemented based on STM 32.
The emergency battery module 19 may continue to power the STM32 single chip microcomputer control module 8 and the 4G communication circuit 17 in the event of an external power outage.
The fingerprint identification module 18 enables an authorized user to operate the device interface after authentication.
The invention has low power consumption, strong reliability, perfect function, simple operation and convenient maintenance, and realizes the functions of adaptive control and information transfer by the FPGA technology. And the functions of converting IP into TS, demultiplexing, PID filtering, fast analysis of scheduling control instructions, RDS decoding and modulation and the like are realized by adopting a single-chip FPGA. Four different information sources can be input simultaneously and mutually backup. An STM32 single-chip microcomputer is used as a main control and communication unit, data interaction is carried out through a remote monitoring interface and upper computer software, and remote monitoring is achieved.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention.
And a 1-IP-to-TS module.
And the 2-TS stream serial-parallel conversion coding module.
And 3-DTMB tuning demodulation module.
And 4-satellite tuning demodulation module.
5-RDS radio FM receiving module.
6-display panel.
7-FPGA digital signal processing circuit.
8-STM32 single chip microcomputer control module.
9-analog audio switching circuit.
10-broadcast program decoding module.
11-audio and video decoding circuit.
12-DDS frequency conversion circuit.
13-gain adjustment circuit.
14-serial communication circuit.
15-network port communication circuit.
16-IP output circuit.
And 17-4G communication module.
18-fingerprint recognition module.
19-emergency battery module.
Detailed Description
The invention discloses a multi-channel broadcast switcher, which comprises a case, wherein an IP (Internet protocol) to TS (transport stream) conversion module 1, a TS serial-parallel conversion coding module 2, a DTMB (digital television broadcasting) tuning demodulation module 3, a satellite tuning demodulation module 4, an RDS (radio data service) radio frequency modulation receiving module 5, a display panel 6, an FPGA (field programmable gate array) digital signal processing circuit 7, an STM32 single-chip microcomputer control module 8, an analog audio switching circuit 9, a broadcast program decoding module 10, an audio and video decoding circuit 11, a DDS (direct digital synthesis) frequency conversion circuit 12, a gain adjusting circuit 13, a serial communication circuit 14, a network port communication circuit 15, an IP (Internet protocol) output circuit 16, a 4G (global) communication module 17, a fingerprint identification module 18 and an emergency battery module 19 are arranged in the case. Meanwhile, the digital signal processing circuit has four inputs of IP, TS, DTMB and DVB-S/S2, outputs an input signal to the PPGA digital signal processing circuit 7 for adaptation control and information transfer after processing, and finally selects a required audio signal to output to a transmitter for signal transmission.
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1: an IP-to-TS module 1, a TS serial-to-parallel conversion coding module 2, a DTMB tuning demodulation module 3, a satellite tuning demodulation module 4, an RDS radio frequency modulation receiving module 5, a display panel 6, an FPGA digital signal processing circuit 7, an STM32 singlechip control module 8, an analog audio switching circuit 9, a broadcast program decoding module 10, an audio and video decoding circuit 11, a DDS frequency conversion circuit 12, a gain adjusting circuit 13, a serial communication circuit 14, a network port communication circuit 15, an IP output circuit 16, a 4G communication module 17, a fingerprint identification module 18 and an emergency battery module 19 are arranged in the case. Has four inputs of IP, TS, DTMB and DVB-S/S2, which are backup to each other. The IP signal is input into an IP-to-TS module 1, and the IP-to-TS module 1 converts data packaged in an IP format into a TS frame format and outputs the TS frame format to an FPGA digital signal processing circuit 7; TS stream data transmitted by a wire is input into a TS stream serial-parallel conversion coding module 2, and is output to an FPGA digital signal processing circuit 7 after serial-parallel conversion and coding; the DTMB radio frequency signal and the DVB-S/S2 satellite radio frequency signal are respectively input into a DTMB tuning demodulation module 3 and a satellite tuning demodulation module 4, and 8-bit TS stream signals are output to an FPGA digital signal processing circuit 7 after tuning and demodulation; the FPGA digital signal processing circuit 7 analyzes and demultiplexes the data and then respectively outputs two paths of TS flow signals to the broadcast program decoding module 10 and the audio and video decoding circuit 11; one path of signal is decoded by a broadcast program decoding module 10 and then output to an analog audio switching circuit 9 as a required broadcast program stream signal; in addition, the audio and video signals are respectively output as monitoring signals after being decoded by the audio and video decoding circuit 11; the wireless frequency modulation signal is output to the analog audio frequency switching circuit 9 through the RDS wireless frequency modulation receiving module 5; the original broadcast sound signal is input to the analog audio switching circuit 9; the analog audio switching circuit 9 switches the audio signal to be played to output to the transmitter according to the broadcast control instruction.
The output end of the FPGA digital signal processing circuit 7 has a TS flow signal which is directly output to a DTMB transmitter, and also has an RDS baseband signal which is output to a DDS frequency conversion circuit 12, and the modulated signal is output to a gain adjusting circuit 13 for gain adjustment and then an RDS radio frequency signal is output.
The system comprises an IP-to-TS (transport stream) module 1, a DTMB (digital television broadcasting) tuning and demodulating module 3, a satellite tuning and demodulating module 4, an RDS (radio data system) radio frequency modulation receiving module 5, an FPGA (field programmable gate array) digital signal processing circuit 7, a broadcast program decoding module 10, an audio and video decoding circuit 11, a serial communication circuit 14, a network port communication circuit 15 and a 4G communication circuit 17, wherein the network port communication circuit 15 and the 4G communication circuit 17 are respectively connected with an STM32 singlechip control module 8 and realize bidirectional communication.
The output end of the STM32 singlechip control module 8 is respectively connected to the display panel 6, the analog audio switching circuit 9 and the IP output circuit 16.
STM32 single chip microcomputer control module 8 adopts STM32 as the control of whole equipment, data acquisition and communication processing core, STM32 single chip microcomputer control module 8 can communicate with FPGA digital signal processing circuit 7 real-time, the control acquires FPGA's operating parameter, externally provide the remote monitoring interface simultaneously, provide host computer application communication mode and WEB communication mode on the remote monitoring interface and realize remote monitoring, the configuration work has been simplified, make display panel 6 configuration menu simpler, clear.
The FPGA digital signal processing circuit 7 carries out decryption, verification and priority processing on the emergency broadcast control instruction; and analyzing the addressing information by adopting the comparison and judgment logic, performing emergency broadcast sound decoding according to the information, and simultaneously sending various upper-level instruction data to the STM32 singlechip control module 8 for RDS baseband coding.
The serial port communication circuit 14, the internet access communication circuit 15, the IP output circuit 16 and the 4G communication circuit respectively output a serial port communication signal, an internet access signal, an RDS signal and a 4G wireless communication signal.
The emergency battery module 19 may continue to power the STM32 single chip microcomputer control module 8 and the 4G communication circuit 17 in the event of an external power outage.
The fingerprint identification module 18 enables an authorized user to operate the device interface after authentication.
Claims (7)
1. A multi-channel broadcast switcher comprises a case, and is characterized in that an IP-to-TS (Internet protocol) module (1), a TS serial-to-parallel conversion coding module (2), a DTMB (digital television broadcasting) tuning demodulation module (3), a satellite tuning demodulation module (4), an RDS (radio data service) radio frequency modulation receiving module (5), a display panel (6), an FPGA (field programmable gate array) digital signal processing circuit (7), an STM32 single-chip microcomputer control module (8), an analog audio switching circuit (9), a broadcast program decoding module (10), an audio and video decoding circuit (11), a DDS (digital synthesis) frequency conversion circuit (12), a gain adjusting circuit (13), a serial port communication circuit (14), a network port communication circuit (15), an IP output circuit (16), a 4G communication module (17), a fingerprint identification module (18) and an emergency battery module (19) are installed in the case; IP signals are input into an IP-to-TS module (1), and are output to an FPGA digital signal processing circuit (7) after data conversion; TS stream data transmitted by a wire is input into a TS stream serial-parallel conversion coding module (2), and is output to an FPGA digital signal processing circuit (7) after serial-parallel conversion and coding; DTMB radio frequency signals and DVB-S/S2 satellite radio frequency signals are respectively input into a DTMB tuning demodulation module (3) and a satellite tuning demodulation module (4) and output to an FPGA digital signal processing circuit (7) after being tuned and demodulated, the FPGA digital signal processing circuit (7) analyzes and demultiplexes data and respectively outputs two paths of TS flow signals to a broadcast program decoding module (10) and an audio and video decoding circuit (11), one path of signals are decoded by the broadcast program decoding module (10) and output to an analog audio switching circuit (9), the other path of signals are decoded by the audio and video decoding circuit (11) and respectively output audio and video signals as monitoring signals, radio frequency modulation signals are output to the analog audio switching circuit (9) through an RDS radio frequency modulation receiving module (5), original broadcast sound signals are input to the analog audio switching circuit (9), the analog audio switching circuit (9) outputs audio signals to a transmitter after signal switching, and the transmitter transmits the audio signals A machine is provided.
2. The multi-channel broadcast switch of claim 1, wherein the output terminal of the FPGA digital signal processing circuit (7) has a TS stream signal directly output to the DTMB transmitter, and an RDS baseband signal output to the DDS frequency conversion circuit (12), and the modulated signal is output to the gain adjustment circuit (13) for gain adjustment and then an RDS rf signal is output.
3. The multi-channel broadcast switcher of claim 1, wherein the IP to TS stream module (1), the DTMB tuning demodulation module (3), the satellite tuning demodulation module (4), the RDS radio fm receiving module (5), the FPGA digital signal processing circuit (7), the broadcast program decoding module (10), the audio/video decoding circuit (11), the serial communication circuit (14), the network port communication circuit (15), and the 4G communication circuit (17) are respectively connected to the STM32 single chip microcomputer control module (8) and implement two-way communication.
4. The multi-channel broadcast switch of claim 1, wherein the STM32 single-chip control module (8) output is connected to the display panel (6), the analog audio switching circuit (9), and the IP output circuit (16), respectively.
5. The multi-channel broadcast switch of claim 1, wherein the serial port communication circuit (14), the internet port communication circuit (15), the IP output circuit (16), and the 4G communication circuit output a serial port communication signal, an internet port signal, an RDS signal, and a 4G wireless communication signal, respectively.
6. The multi-channel broadcast switch of claim 1 wherein the emergency battery module (19) can continue to power the STM32 single-chip control module (8) and the 4G communication circuit (17) in the event of an external power outage.
7. The multi-channel broadcast switch of claim 1, wherein the control module is a real-time monitoring system implemented based on STM 32.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010306083.2A CN113542837A (en) | 2020-04-17 | 2020-04-17 | Multichannel broadcasting switcher |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010306083.2A CN113542837A (en) | 2020-04-17 | 2020-04-17 | Multichannel broadcasting switcher |
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| CN113542837A true CN113542837A (en) | 2021-10-22 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106034259A (en) * | 2015-03-13 | 2016-10-19 | 杭州云链网络技术有限公司 | Router and broadcasting method for multipath broadcast digital television signals |
| CN205883470U (en) * | 2016-08-05 | 2017-01-11 | 广西广播电视技术中心 | Multichannel urgent broadcasting adapter |
| CN208227036U (en) * | 2018-06-01 | 2018-12-11 | 李翔 | The switching of emergent broadcast system terminal multichannel and data acquire return system |
| CN211630294U (en) * | 2020-04-17 | 2020-10-02 | 广西广播电视技术中心 | Multichannel broadcasting switcher |
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2020
- 2020-04-17 CN CN202010306083.2A patent/CN113542837A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106034259A (en) * | 2015-03-13 | 2016-10-19 | 杭州云链网络技术有限公司 | Router and broadcasting method for multipath broadcast digital television signals |
| CN205883470U (en) * | 2016-08-05 | 2017-01-11 | 广西广播电视技术中心 | Multichannel urgent broadcasting adapter |
| CN208227036U (en) * | 2018-06-01 | 2018-12-11 | 李翔 | The switching of emergent broadcast system terminal multichannel and data acquire return system |
| CN211630294U (en) * | 2020-04-17 | 2020-10-02 | 广西广播电视技术中心 | Multichannel broadcasting switcher |
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