CN110231786A - A kind of MCVF multichannel voice frequency switch - Google Patents
A kind of MCVF multichannel voice frequency switch Download PDFInfo
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- CN110231786A CN110231786A CN201910408357.6A CN201910408357A CN110231786A CN 110231786 A CN110231786 A CN 110231786A CN 201910408357 A CN201910408357 A CN 201910408357A CN 110231786 A CN110231786 A CN 110231786A
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- 238000012544 monitoring process Methods 0.000 claims abstract description 16
- 238000006243 chemical reaction Methods 0.000 claims abstract description 14
- 230000005236 sound signal Effects 0.000 claims abstract description 14
- 239000013078 crystal Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims 1
- 238000004088 simulation Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25257—Microcontroller
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
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Abstract
The invention discloses a kind of MCVF multichannel voice frequency switch, including preceding display board, preceding display board is internally provided with CLED display unit, key LED unit, monitoring unit and MCU control unit, key LED unit is used for the selection and display of current channel, monitoring unit is internally provided with monitoring circuit, monitoring circuit uses ES9023 chip, for the I2S audio signal of input to be converted into analog audio signal.A kind of MCVF multichannel voice frequency switch of the present invention, with high time precision, support the switching of analog or digital voice-grade channel, it is adapted to analogue audio frequency system and digital audio system simultaneously in switching voice-grade channel, it is completed at the same time the conversion that analogue audio frequency is converted into analogue audio frequency to digital audio or digital audio, the multi-period control system that can be set adapts to multitask switch operating, the booting automatic positioning period need not manual setting, the intuitive displaying of the monitor function of current channel earphone and the LED Display Realization current handoff state of present video amplitude is provided, bring better prospect of the application.
Description
Technical field
The present invention relates to MCVF multichannel voice frequency switch field, in particular to a kind of MCVF multichannel voice frequency switch.
Background technique
With development in science and technology, China's radio and television services achieve further development, and automation is broadcasted gradually
As the inexorable trend of Broadcast Development, when previous fixed position rate advertisement, news program, generally requires engineering staff and manually select sound
Often there is the problems such as time is not accurate enough, complex steps are manually operated in personnel in frequency channel, such operation, past use oneself
Dynamicization switch voice-grade channel equipment, there is also the time it is not accurate enough do not adapt to synchronized broadcast switching time precision requirement,
Equipment volume is excessive, does not support the problems such as analog- and digital- audio mix switching, for this purpose, it is proposed that a kind of MCVF multichannel voice frequency switches
Device.
Summary of the invention
The main purpose of the present invention is to provide a kind of MCVF multichannel voice frequency switch, can effectively solve asking in background technique
Topic.
To achieve the above object, the technical scheme adopted by the invention is as follows:
A kind of MCVF multichannel voice frequency switch, including preceding display board, the preceding display board be internally provided with CLED display unit, by
Key LED unit, monitoring unit and MCU control unit,
The key LED unit is used for the selection and display of current channel,
The monitoring unit is internally provided with monitoring circuit, and the monitoring circuit uses ES9023 chip, and being used for will be defeated
The I2S audio signal entered is converted into analog audio signal,
The MCU control unit is internally provided with MCU control circuit, and the MCU control circuit uses STM32F107VCT6
Chip,
It is connected with external control interface RS232 and USB on the preceding display board, is also connected with switching on the preceding display board
Interface Controller route plate.
Preferably, it is defeated that standard time clock unit, selection control unit, audio are provided on the switching interface control circuit board
Enter processing unit and audio output processing unit,
The standard time clock unit with selection control unit connect with preceding display board, the audio input process unit and
Audio output processing unit passes through selection control unit and connect with preceding display board,
The side of the standard time clock unit is connected with antenna,
The upper end of the audio input process unit is connected with digital audio or analog audio input unit, and the audio is defeated
The upper end of processing unit is connected with digital audio or analogue audio frequency output unit out,
The digital audio or analog audio input unit include digital audio incoming line plate and analog audio input line
Road plate, the digital audio or analogue audio frequency output unit include digital audio output circuit board and analogue audio frequency outlet line
Plate.
Preferably, it is provided with digital audio input circuit on the digital audio incoming line plate, the digital audio is defeated
Enter circuit to be constituted AES by sample rate converter ic CS8422 and peripheral components (crystal oscillator, configuration circuit etc.) and turned serial audio
I2S circuit.
Preferably, it is provided with analog audio input circuit on the analog audio input wiring board, the analogue audio frequency is defeated
Enter circuit and difference analogue audio conversion I2S voicefrequency circuit is constituted by PCM4420 and peripheral components (crystal oscillator, configuration circuit etc.).
Preferably, it is provided with digital audio output circuit on the digital audio output circuit board, the digital audio is defeated
Circuit is made of I2S audio conversion AES3 digital audio circuit DIT4192 chip periphery device (crystal oscillator, configuration circuit etc.) out.
Preferably, it is provided with analogue audio frequency output circuit on the analogue audio frequency output circuit board, the analogue audio frequency is defeated
Circuit constitutes I2S audio conversion difference analogue voicefrequency circuit by PCM1794 chip periphery device (crystal oscillator, configuration circuit etc.) out.
Preferably, it is provided with switching selecting circuit in the selection control unit, the switching selecting circuit is (defeated by muti-piece
Enter number of channels decision) 74HC245 composition gating control is carried out to multichannel I2S audio signal.The enable end of muti-piece 74HC245 is all
GPIO pin with MCU is connected, the output end of this muti-piece 74HC245 is connected on the output port of switching selecting circuit,
Only one 74HC245 chip, which is in enabled state, in the control software of MCU can complete the selection in a channel.
Compared with prior art, the invention has the following beneficial effects:
1, by the selection control unit of setting, have high time precision (switching time precision reaches 0.1 second), support mould
The switching of quasi- or digital audio channel, while exporting analog differential audio and number AES3 audio i.e. while being adapted to analogue audio frequency system
Analogue audio frequency is completed while switching voice-grade channel with digital audio system to be converted into simulating to digital audio or digital audio
The conversion of audio.
2, the multi-period control system (7 days one week daily 8 periods) that can be set adapts to multitask switch operating, booting
Being automatically positioned the period need not manual setting.
3, the monitor function of current channel earphone and the LED Display Realization current handoff state of present video amplitude are provided
It is intuitive to show, while possessing USB and RS232 external communication interface and being docked with external control system perfection.
Part is not directed in the device to be the same as those in the prior art or can be realized by using the prior art.
Detailed description of the invention
Fig. 1 is a kind of overall system diagram of MCVF multichannel voice frequency switch of the present invention；
Fig. 2 is a kind of local system block diagram of MCVF multichannel voice frequency switch of the present invention；
Fig. 3 is a kind of system block diagram of the preceding display board of MCVF multichannel voice frequency switch of the present invention；
Fig. 4 is a kind of system block diagram of the switching interface control circuit board of MCVF multichannel voice frequency switch of the present invention；
Fig. 5 is a kind of switching principle figure of MCVF multichannel voice frequency switch of the present invention.
Specific embodiment
With reference to the accompanying drawing, the embodiment of the present invention is described in further detail.
Embodiment 1
As shown in Figs 1-4, a kind of MCVF multichannel voice frequency switch, including preceding display board, it is aobvious that preceding display board is internally provided with CLED
Show that unit, key LED unit, monitoring unit and MCU control unit, key LED unit are used for the selection and display of current channel,
Monitoring unit is internally provided with monitoring circuit, and monitoring circuit uses ES9023 chip, the best sound quality of the chipset, high performance-price ratio
, the ideal chose for making digital-to-analogue conversion, for the I2S audio signal of input to be converted into analog audio signal,
MCU control unit is internally provided with MCU control circuit, and MCU control circuit uses STM32F107VCT6 chip, chip operation
Speed is fast, and memory capacity is sufficient, and performance is stablized, by using above-mentioned technical proposal: the multi-period control system that can be set (one week
7 days daily 8 periods) adapt to multitask switch operating, booting automatic positioning the period need not manual setting.
It is connected with external control interface RS232 and USB on preceding display board, is also connected with switching interface control on preceding display board
Wiring board.
By using above-mentioned technical proposal: the LED of the monitor function and present video amplitude that provide current channel earphone is aobvious
Show the intuitive displaying for realizing current handoff state, while possessing USB and RS232 external communication interface and external control system perfection
Docking.
Embodiment 2
As shown in Figs. 1-5, a kind of MCVF multichannel voice frequency switch is provided with standard time clock list on switching interface control circuit board
Member, selection control unit, audio input process unit and audio output processing unit, standard time clock unit and selection control unit
It is connect with preceding display board, audio input process unit and audio output processing unit pass through selection control unit and preceding display
Plate connection, the side of standard time clock unit are connected with antenna, and the upper end of audio input process unit is connected with digital audio or mould
Quasi- audio input unit, the upper end of audio output processing unit is connected with digital audio or analogue audio frequency output unit, digital sound
Frequency or analog audio input unit include digital audio incoming line plate and analog audio input wiring board, digital audio or simulation
Audio output unit includes digital audio output circuit board and analogue audio frequency output circuit board.
Digital audio input circuit is provided on digital audio incoming line plate, digital audio input circuit is turned by sample rate
It changes integrated circuit CS8422 and peripheral components (crystal oscillator, configuration circuit etc.) constitutes AES and turn serial audio I2S circuit.
Analog audio input circuit is provided on analog audio input wiring board, analog audio input circuit is by PCM4420
And peripheral components (crystal oscillator, configuration circuit etc.) constitute difference analogue audio conversion I2S voicefrequency circuit.
Digital audio output circuit is provided on digital audio output circuit board, digital audio output circuit is by DIT4192
Chip periphery device (crystal oscillator, configuration circuit etc.) constitutes I2S audio conversion AES3 digital audio circuit.
Analogue audio frequency output circuit is provided on analogue audio frequency output circuit board, analogue audio frequency output circuit is by PCM1794
Chip periphery device (crystal oscillator, configuration circuit etc.) constitutes I2S audio conversion difference analogue voicefrequency circuit.
It is provided with switching selecting circuit in selection control unit, switching selecting circuit is by muti-piece (input channel quantity determines)
74HC245 composition carries out gating control to multichannel I2S audio signal.The enable end of muti-piece 74HC245 is all with the GPIO pin of MCU
It is connected, the output end of this muti-piece 74HC245 is connected on the output port of switching selecting circuit, in the control software of MCU
Only one 74HC245 chip, which is in enabled state, can complete the selection in a channel.
It supports analogue audio frequency and digital audio Mixed design, installation analog audio input interface hardware module or number may be selected
Audio-source of the word audio input interface hardware module as switching input channel.When digital audio interface hardware module is installed in selection
When the external input interface in the channel only one card agriculture interface, the main digital audio interface chip (CS8422) with profession will
The AES3 signal of uncertain sample rate is converted into the I of fixed sample rate2S audio signal.When selection installation simulation numeral audio connects
The external input interface in the channel is needed there are two card agriculture interface when mouth hardware module, main with professional modulus conversion chip
Balance simulation audio is converted into the I2S audio signal of fixed sample rate by ADC (PCM4220).
Analogue audio frequency and digital audio is supported to export simultaneously, the convenient audio transmission with distinct interface in broadcast transmission computer room
Equipment is docked.The I all the way that switching circuit is exported2S signal is divided into two while to Digital Audio Output Modules and simulation
Audio output module.It is main to use professional analog-digital chip DAC (PCM1794) by fixed sample when exporting analogue audio frequency
The I of rate2S audio signal is converted into balance simulation audio output；When exporting digital audio, the main digital audio with profession is defeated
Outgoing interface chip (DIT4192) is by the I of fixed sample rate2S signal is converted into the AES3 audio signal of 48K sample rate.
Switching principle: the I that several roads are inputted using 74HC245 bus marco chip2S signal carries out gating control.
By using above-mentioned technical proposal: the selection control unit of setting, having high time precision, (switching time precision reaches
By 0.1 second), support the switching of analog or digital voice-grade channel, while exporting analog differential audio and number AES3 audio, i.e., simultaneously
Analogue audio frequency system and digital audio system are adapted in switching voice-grade channel, is completed at the same time analogue audio frequency to digital audio or number
Audio is converted into the conversion of analogue audio frequency.
GPS (global positioning system) and BDS (Chinese Beidou Navigation System) timing positioning mould are supported simultaneously in other field
Group is widely used in the equipment for needing high precision timing to position.This mould group can be conducive to automate in broadcast system to broadcast just
Aspect, this preferably improves the time precision and net synchronization capability of automated audio channel switching in broadcast system transmission.
The above is only the preferred embodiment for the present invention, it is noted that for those skilled in the art,
Without departing from the inventive concept of the premise, several improvements and modifications can also be made, these improvements and modifications also should be regarded as this
In invention protection scope.
Claims (7)
1. a kind of MCVF multichannel voice frequency switch, including preceding display board, it is characterised in that: it is aobvious that the preceding display board is internally provided with CLED
Show unit, key LED unit, monitoring unit and MCU control unit,
The key LED unit is used for the selection and display of current channel,
The monitoring unit is internally provided with monitoring circuit, and the monitoring circuit uses ES9023 chip, for what will be inputted
I2S audio signal is converted into analog audio signal,
The MCU control unit is internally provided with MCU control circuit, and the MCU control circuit uses STM32F107VCT6 core
Piece,
It is connected with external control interface RS232 and USB on the preceding display board, is also connected with switching interface on the preceding display board
Control circuit board.
2. a kind of MCVF multichannel voice frequency switch according to claim 1, it is characterised in that: the switching interface control circuit board
On be provided with standard time clock unit, selection control unit, audio input process unit and audio output processing unit,
The standard time clock unit is connect with preceding display board with selection control unit, the audio input process unit and audio
Output processing unit passes through selection control unit and connect with preceding display board,
The side of the standard time clock unit is connected with antenna,
The upper end of the audio input process unit is connected with digital audio or analog audio input unit, at the audio output
The upper end of reason unit is connected with digital audio or analogue audio frequency output unit,
The digital audio or analog audio input unit include digital audio incoming line plate and analog audio input wiring board,
The digital audio or analogue audio frequency output unit include digital audio output circuit board and analogue audio frequency output circuit board.
3. a kind of MCVF multichannel voice frequency switch according to claim 2, it is characterised in that: the digital audio incoming line plate
On be provided with digital audio input circuit, the digital audio input circuit is by sample rate converter ic CS8422 and periphery
Device (crystal oscillator, configuration circuit etc.) constitutes AES and turns serial audio I2S circuit.
4. a kind of MCVF multichannel voice frequency switch according to claim 2, it is characterised in that: the analog audio input wiring board
On be provided with analog audio input circuit, the analog audio input circuit is by PCM4420 and peripheral components (crystal oscillator, configuration electricity
Road etc.) constitute difference analogue audio conversion I2S voicefrequency circuit.
5. a kind of MCVF multichannel voice frequency switch according to claim 2, it is characterised in that: the digital audio output circuit board
On be provided with digital audio output circuit, the digital audio output circuit is by DIT4192 chip periphery device (crystal oscillator, configuration
Circuit etc.) constitute I2S audio conversion AES3 digital audio circuit.
6. a kind of MCVF multichannel voice frequency switch according to claim 2, it is characterised in that: the analogue audio frequency output circuit board
On be provided with analogue audio frequency output circuit, the analogue audio frequency output circuit is by PCM1794 chip periphery device (crystal oscillator, configuration
Circuit etc.) constitute I2S audio conversion difference analogue voicefrequency circuit.
7. a kind of MCVF multichannel voice frequency switch according to claim 2, it is characterised in that: be arranged in the selection control unit
There is switching selecting circuit, the switching selecting circuit is made of muti-piece (input channel quantity determines) 74HC245 to multichannel I2S sound
Frequency signal carries out gating control.The enable end of muti-piece 74HC245 is all connected with the GPIO pin of MCU, this muti-piece 74HC245's is defeated
Outlet is connected on the output port of switching selecting circuit, only one 74HC245 chip is in the control software of MCU
Enabled state can complete the selection in a channel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910408357.6A CN110231786A (en) | 2019-05-16 | 2019-05-16 | A kind of MCVF multichannel voice frequency switch |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910408357.6A CN110231786A (en) | 2019-05-16 | 2019-05-16 | A kind of MCVF multichannel voice frequency switch |
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| CN203289623U (en) * | 2012-12-31 | 2013-11-13 | 广州励丰文化科技股份有限公司 | Active loudspeaker based on multiple-DSP (digital signal processor) system |
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| CN104503322A (en) * | 2014-12-18 | 2015-04-08 | 姜斯平 | Audio signal switching device |
| CN204287861U (en) * | 2014-12-18 | 2015-04-22 | 姜斯平 | A kind of audio-frequency signal switching device |
| CN106375051A (en) * | 2016-09-28 | 2017-02-01 | 王洴 | Device for automatically switching analog audio and AES3 digital audio mixed signals |
| CN209980048U (en) * | 2019-05-16 | 2020-01-21 | 杭州众传数字设备有限公司 | Multi-channel audio switcher |
-
2019
- 2019-05-16 CN CN201910408357.6A patent/CN110231786A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19990049091A (en) * | 1997-12-11 | 1999-07-05 | 김영환 | High Definition TV Audio Analog / Digital Inverter |
| US20040146034A1 (en) * | 2003-01-29 | 2004-07-29 | Chih-Sheng Chou | Audio and data multiplexed wireless audio system |
| US20080208377A1 (en) * | 2007-02-28 | 2008-08-28 | Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. | Universal audio interface apparatus and audio processing device using the same |
| CN201518485U (en) * | 2009-06-25 | 2010-06-30 | 广州飞达音响专业器材有限公司 | Embedded digital sound mixing console |
| CN203289623U (en) * | 2012-12-31 | 2013-11-13 | 广州励丰文化科技股份有限公司 | Active loudspeaker based on multiple-DSP (digital signal processor) system |
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| CN209980048U (en) * | 2019-05-16 | 2020-01-21 | 杭州众传数字设备有限公司 | Multi-channel audio switcher |
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