WO2021208495A1

WO2021208495A1 - Adaptive pickup all-in-one control system

Info

Publication number: WO2021208495A1
Application number: PCT/CN2020/139868
Authority: WO
Inventors: 王祥贵; 唐海生; 陆佳莹
Original assignee: 音王电声股份有限公司
Priority date: 2020-04-16
Filing date: 2020-12-28
Publication date: 2021-10-21
Also published as: CN111385716A; CN112073876A; CN112073876B

Abstract

Disclosed in the present invention is an adaptive pickup all-in-one control system, comprising a DSP audio and video processor, at least one microphone audio input module, a USB recording and broadcasting module, and a power supply. The power supply provides a working voltage for the control system. The microphone audio input module is used for picking up a sound signal of a user, and sending the sound signal to the DSP audio and video processor. The sound signal processed by the DSP audio and video processor is outputted to an external loudspeaker box. The USB recording and broadcasting module can save the sound signal processed by the DSP audio and video processor. The DSP audio and video processor can invoke the sound signal saved in the USB recording and broadcasting module, or invoke data information in a data storage device inserted in the USB recording and broadcasting module, and then output the invoked sound signal or data information to the external loudspeaker box. The adaptive pickup all-in-one control system can pick up and save the sound in the environment, and can also invoke and play the saved sound information, and therefore has a wide application range.

Description

A self-adaptive pickup integrated machine control system

Technical field

The invention relates to audio processing equipment, in particular to an adaptive sound pickup integrated machine control system.

Background technique

The existing technology integrates array microphones, audio processors, feedback suppressors, switches and digital power amplifiers, etc., and applies them in relatively open environments such as lecture halls and conference halls, so that the voice of the lecturer can be clearly conveyed to all For students or participants of the conference, due to the large number of equipment used, the corresponding connection lines are also cumbersome and complicated, the installation is troublesome in the early stage, and the rearrangement and maintenance are inconvenient, and each device needs to be operated when using it. convenient.

Summary of the invention

The technical problem to be solved by the present invention is to provide an adaptive pickup integrated machine control system, which integrates multiple functions of array microphone, audio processor, feedback suppressor, switch and digital power amplifier in one device, occupying space Small and easy to use.

The technical solutions adopted by the present invention to solve the above technical problems are:

An adaptive pickup integrated machine control system, including a DSP audio and video processor, at least one microphone audio input module, a USB recording and broadcasting module, and a power supply. The power supply provides a working voltage for the control system, and the microphone audio input module is used To pick up the user's sound signal and send the sound signal to the DSP audio and video processor, and output the sound signal processed by the DSP audio and video processor to an external speaker;

The USB recording and broadcasting module can save the sound signal processed by the DSP audio and video processor, and the DSP audio and video processor can retrieve the sound signal saved by the USB recording and broadcasting module, or retrieve the sound signal inserted in the USB recording The data information in the data storage device on the broadcasting module is then output to the external speaker.

Preferably, it also includes a Dante module and a POE switch module connected to each other, the Dante module is connected to the DSP audio and video processor, and the Dante module receives the digital signal output by the DSP audio and video processor and transmits the digital signal to The POE switch module outputs a digital signal to an external POE speaker.

Preferably, it also includes a D/A conversion module connected to the DSP audio and video processor, the D/A conversion module receives the digital signal output by the DSP audio and video processor and converts the digital signal into an analog signal before outputting To passive speakers.

Preferably, it also includes a video recording and broadcasting module connected to the DSP audio and video processor, the video recording and broadcasting module can pick up and save the images in the environment, and the DSP audio and video processor can simultaneously call the USB recording and broadcasting module saved The sound signal and the image information saved by the video recording and broadcasting module are then synchronized to output the audio and video to the external speaker and external video player.

Preferably, each of the microphone audio input modules includes at least one microphone module and an A/D conversion module, the microphone module outputs an analog signal of the picked-up sound to the A/D conversion module, and the A/D conversion The module converts the analog signal into a digital signal and sends it to the DSP audio and video processor.

Preferably, it also includes a central control panel, which realizes interaction with the DSP audio and video processor through the chip RS232.

Preferably, it also includes a Bluetooth module and a WiFi module connected to the DSP audio and video processor, and the Bluetooth module and the WiFi module use radio technology to input digital audio data.

Preferably, it also includes a GPIO module, which can be used to output control instructions or receive control instructions.

Preferably, the USB recording and broadcasting module includes a sound card main chip circuit, a start-up circuit, and a USB communication circuit. Both the start-up circuit and the USB communication circuit are connected to the sound card main chip circuit, and the start-up circuit includes a crystal oscillator, The clock oscillation frequency can be generated to ensure the normal operation of the USB sound card chip in the sound card main chip circuit.

Preferably, the DSP audio processing module includes an expansion unit, an equalization unit, an automatic gain unit, a matrix mixing unit, a feedback/echo/noise cancellation unit, a delay unit, a frequency division unit, a filtering unit and an amplitude limiting unit.

Compared with the prior art, the advantages of the adaptive pickup integrated machine control system of the present invention are:

(1) Integrate the functions of the microphone array, processor and feedback suppressor in the prior art into the same device, and use the DSP audio and video processor for audio processing. The user can control and use different processing methods through the central control panel. To process the audio signal, and the system can also process the analog signal picked up by the microphone and send it to the sound reinforcement equipment of the speaker;

(2) By setting the USB recording and broadcasting module, the sound signal sent from the microphone audio input module to the DSP audio and video processor can be saved through the USB recording and broadcasting module. When it needs to be played, the DSP audio and video processor can also be retrieved and saved. It can be used in classrooms and conference rooms to record the content of the course or meeting;

(3) The all-in-one has a built-in POE switch module. The POE switch module can interact with the PC through the network. The input and output channels of the all-in-one can be balanced, feedback cancellation, echo cancellation, noise cancellation, etc. Parameter settings;

(4) Through the built-in Bluetooth module or WiFi module, it can be connected with a mobile phone or PAD to realize music or video playback;

(5) Through the USB recording and broadcasting module, automatically read and select MP3, WAV format audio files and video files in U disk or other storage devices for playback;

(6) Through the GPIO module, it can be used for input or output, and can control external devices such as alarms or electric curtains connected to it.

Description of the drawings

Figure 1 is a schematic diagram of the structure of the all-in-one control system in this embodiment;

FIG. 2 is a schematic diagram 1 of the interface circuit of the chip M1 in the DSP audio and video processor in this embodiment;

Figure 3 is a second schematic diagram of the interface circuit of the chip M1 in the DSP audio and video processor in this embodiment;

4 is a schematic diagram of the main chip circuit of the sound card in this embodiment;

Figure 5 is a schematic diagram of the starting circuit in this embodiment;

FIG. 6 is a schematic diagram of the USB communication circuit in this embodiment;

FIG. 7 is a schematic diagram of the Dante network interface circuit in this embodiment;

FIG. 8 is a schematic diagram of the Dante interface circuit in this embodiment;

FIG. 9 is a schematic diagram of the digital-to-analog conversion circuit in this embodiment;

FIG. 10 is a schematic diagram of the first shaping filter circuit in this embodiment;

FIG. 11 is a schematic diagram of the second shaping filter circuit in this embodiment;

FIG. 12 is a schematic diagram of the analog-to-digital conversion circuit in this embodiment;

FIG. 13 is a schematic circuit diagram of the Bluetooth module in this embodiment;

Fig. 14 is a circuit diagram 1 of the WiFi module in this embodiment;

FIG. 15 is the second schematic diagram of the circuit of the WiFi module in this embodiment;

FIG. 16 is a schematic diagram of a circuit for connecting a wireless microphone with a WiFi module in this embodiment.

In the figure, 1. DSP audio and video processor; 2. Microphone audio input module; 21, microphone module; 22, A/D conversion module; 3. USB recording and broadcasting module; 41, Dante module; 42, POE switch module; 51 , D/A conversion module; 52, power amplifier module; 6, video recording and broadcasting module; 7, central control panel; 81, Bluetooth module; 82, WiFi module; 9, GPIO module.

Detailed ways

The present invention will be further described in detail below in conjunction with the embodiments of the drawings.

An adaptive integrated pickup control system, as shown in Figure 1-16, includes a DSP audio and video processor 1, at least one microphone audio input module 2, a USB recording and broadcasting module 3, and a power supply. The power supply provides work for the control system Voltage, the microphone audio input module 2 is used to pick up the user's sound signal and send the sound signal to the DSP audio and video processor 1, and the sound signal processed by the DSP audio and video processor is output to the external speaker.

The USB recording and broadcasting module 3 can save the sound signal processed by the DSP audio and video processor, and the DSP audio and video processor can retrieve the sound signal saved by the USB recording and broadcasting module, or the plug-in USB recording and broadcasting module 3. Data information in the data storage device, and then output the retrieved sound signal or data information to an external speaker.

Among them, the DSP audio and video processor 1 mainly includes the chip M1, the specific model is L138COREB, including the M1A and M1B pin circuits in the figure, and the USB recording and broadcasting module 3 includes the main chip circuit of the sound card, the starting circuit and the USB communication circuit. Both the oscillation circuit and the USB communication circuit are connected with the main sound card chip circuit. The start-up circuit includes a crystal oscillator Y3, which can generate a clock oscillation frequency, thereby ensuring the normal operation of the USB sound card chip U23 in the sound card main chip circuit. The USB recording and broadcasting module 3 is driver-free and suitable for the input and output of audio stored in PCs, tablets, mobile phones, U disks, etc.

Specifically, the USB sound card chip U23 in the sound card main chip circuit uses AD62557, the crystal oscillator Y3 uses a 12M crystal oscillator, the 1 pin of the crystal oscillator Y3 is connected to the 13 pin of the sound card main chip U23, and the 2 pin of the crystal oscillator Y3 is connected to the 12 pin of the sound card main chip U23. foot. The USB communication circuit includes the USB-B type interface J18, which can be plugged into a conventional U disk, the 2 pin of the interface J18 is connected to the 19 pin of the USB sound card chip U23, the 3 pin of the interface J18 is connected to the 18 pin of the USB sound card chip U23, and the USB sound card The 26 pins and 38 pins of the chip U23 are connected to the 56 pins of the M1B, the 25 pins of the USB sound card chip U23 are connected to the 30 pins of the M1B, and the 22 pins and 40 pins of the USB sound card chip U23 are connected to the M1B respectively. Connect the 39 pins and 40 pins of the USB sound card chip U23, the 23 pins and 41 pins of the USB sound card chip U23 to the 41 pins and 42 pins of the M1B, respectively, the 22 pin of the USB sound card chip U23 and the 39 pins of the M1B or 40-pin connection, the 18-pin USB sound card chip U23 is connected to the 30-pin M1A, the 19-pin USB sound card chip U23 is connected to the 32-pin M1A, if necessary, you can also connect a USB recording and broadcasting module 3. Connect to the 24 pins and 26 pins of the chip M1A, the 39 pins of the USB sound card chip U23 are connected to the 58 pins of the M1B, and the 10 pins and 11 pins of the USB sound card chip U23 are connected to the 43 pins of the M1A. Pin and 45 pin are connected.

Provide 5V and 3.3V working voltage to the USB recording and broadcasting module 3, and then edit the burning debugging program to the USB sound card chip U23, so that the USB sound card chip U23 can realize the pickup, storage and playback of environmental sounds. Two USB sound card chips U23 can be connected through the DSP chip, so that two USB recording and broadcasting modules 3 can work at the same time, or one of the USB recording and broadcasting modules 3 can be used as a backup, thereby extending the use time of the all-in-one control system.

The all-in-one control system also includes a Dante module 41 and a POE switch module 42 that are connected to each other. The Dante module 41 is connected to the DSP audio and video processor 1, and the Dante module 41 receives the digital signal output by the DSP audio and video processor 1 and converts the digital signal. It is sent to the POE switch module 42, and the POE switch module 42 outputs the digital signal to the external POE speaker. The main purpose of setting the Dante module 41 is to transmit digital signals over a long distance through a network cable, which has the advantages of low delay and low loss, and then connects to the POE switch module 42 through a network cable. Support standard Dante protocol, up to four output channels, four output channels, the input and output channels can be configured through Dante Controller software to connect different devices.

The Dante module 41 includes a Dante network interface circuit and a Dante interface circuit, both of which are connected to the DSP audio and video processor 1. The Dante network interface circuit includes a chip J20, which is connected to the DSP audio and video processor 1 through a network transformer T2, and the chip J20 The model of the network transformer is RJ45, and the model of the network transformer T2 is H16101MC. Specifically, the 1 pin of the chip J20 is connected to the 16 pin of the network transformer T2, the 2 pin of the chip J20 is connected to the 14 pin of the network transformer T2, and the 3 pin of the chip J20 is connected to the 11 pin of the network transformer T2. , The 6 pins of the chip J20 are connected to the 9 pins of the network transformer T2, the 1 pin of the network transformer T2 is connected to the 6 pins of the chip M1A, and the 3 pins of the network transformer T2 are connected to the 4 pins of the chip M1A. The 6 pins of the transformer T2 are connected to the 12 pins of the chip M1A, and the 8 pins of the network transformer T2 are connected to the 10 pins of the chip M1A. The Dante interface circuit includes the chip J19A, the specific model is UNTIMOMODULE, the 1 pin of the chip J19A is connected to the 15 pin of the chip J20, the 6 pin of the chip J19A is connected to the 14 pin of the chip J20, and the 2 pin of the chip J19A is connected to the chip The 10-pin of J20 is connected, the 3-pin of the chip J19A is connected to the 12-pin of the chip J20, the 4-pin of the chip J19A is connected to the 4-pin of the chip J20, the 5-pin of the chip J19A is connected to the 6-pin of the chip J20 Connect, the 13-pin of chip J19A is connected to the 60-pin of chip J20, the 14-pin of chip J19A is connected to the 64-pin of chip J20, the 15-pin of chip J19A is connected to the 48-pin of chip J20, and the pin of chip J19A is connected. The 16-pin is connected to the 58-pin of the chip J20.

The all-in-one control system also includes a D/A conversion module 51 connected with the DSP audio and video processor 1, and a power amplifier module 52 connected with the D/A conversion module 51. The D/A conversion module 51 receives the output of the DSP audio and video processor 1. The digital signal is converted into an analog signal and then output to the power amplifier module 52, and the analog signal amplified by the power amplifier module 52 is output to the passive speaker.

The D/A conversion module 51 includes a digital-to-analog conversion circuit. The digital-to-analog conversion circuit converts the digital circuit output by the DSP audio and video processor 1 into an analog signal and outputs it. The digital-to-analog conversion circuit includes a digital-to-analog conversion chip U3 and a first shaping filter circuit. , Through the multiple conversion chips and the first shaping filter circuit connected with the DSP audio and video processor 1, the output of four lines can be realized to meet the needs of users.

Specifically, the 19 pins and 20 pins of the chip U3 can be used to connect with the two input terminals of the first shaping filter circuit, and the 23 pins and 24 pins of the chip U3 can also be used to connect with the first shaping filter circuit. The two input ends of the first shaping filter circuit are connected, and the output end of the first shaping filter circuit is connected to the POE speaker.

The all-in-one control system also includes a video recording and broadcasting module 6 connected to the DSP audio and video processor 1. The video recording and broadcasting module 6 can pick up and save the images in the environment, and the DSP audio and video processor 1 can simultaneously call the USB recording and broadcasting module for storage. The audio signal and the image information saved by the video recording and broadcasting module are then synchronized to output the audio and video to the external speaker and external video player. Similar to the USB audio processing module, the image in the environment can be collected through the camera, and then combined with the USB audio processor to realize the transmission of video and sound.

Each microphone audio input module 2 includes at least one microphone module 21 and an A/D conversion module 22, that is, one microphone audio input module 2 can be connected to multiple microphone modules 21, and each microphone module 21 can integrate the picked up sound when working. The analog signal is output to the A/D conversion module 22, and the A/D conversion module 22 converts the analog signal into a digital signal and transmits it to the DSP audio and video processor 1.

The A/D conversion module 22 includes a second shaping filter circuit and an analog-to-digital conversion circuit. The input end of the second shaping filter circuit is connected to the microphone module 21, and the analog signal input from the microphone module 21 is shaped and filtered to the analog-digital conversion chip U6, The analog signal is converted into a digital signal through the analog-to-digital conversion chip U6 and output to the DSP audio and video processor 1 for processing.

The all-in-one control system also includes a central control panel 7. The central control panel 7 interacts with the DSP audio and video processor 1 through the chip RS232, and controls the DSP audio and video processor 1 to perform different audio processing, scene switching, and volume control. Operation of functions such as increase, decrease, switch, etc.

The all-in-one control system also includes a Bluetooth module 81 and a WiFi module 82 connected to the DSP audio and video processor 1, and the Bluetooth module 81 and the WiFi module 82 use radio technology to input digital audio data. For example, a mobile phone or a PAD can be connected to the system through a Bluetooth module 81 or a WiFi module 82 to realize music playback. The specific circuit of the Bluetooth module 81 is shown in Figure 13, which supports two-way output of voice signals. The specific circuit of the WiFi module 82 is shown in Figures 14-16, including the chip U1, the chip U27 and the circuit connected to the wireless microphone, which can be connected to the wireless microphone. , And realize dual-channel input.

The all-in-one control system also includes a GPIO module 9, which can be used to output control instructions or receive control instructions. For example, it can control external devices such as alarms or electric curtains connected to it.

The DSP audio processing module includes expansion unit, equalization unit, automatic gain unit, matrix mixing unit, feedback/echo/noise cancellation unit, delay unit, frequency division unit, filter unit and limiter unit, which are mainly burned in Implementation of the program in the chip. The POE switch module can interact with the PC through the network. A series of parameter settings such as equalization, feedback cancellation, echo cancellation, and noise cancellation can be performed on the input and output channels of the all-in-one machine on the PC side control interface.

Compared with the prior art, the all-in-one control system of the present invention has the advantage of integrating the functions of the array microphone, processor, and feedback suppressor in the prior art into the same device, and the DSP audio and video processor 1 is used for audio processing. Processing, the user can control and use different processing methods to process the audio signal through the central control panel 7, and the system can also process the analog signal picked up by the microphone and send it to the sound reinforcement equipment of the speaker; by setting the USB recording and broadcasting module 3. The sound signal sent from the microphone audio input module to the DSP audio and video processor can be saved through the USB recording and broadcasting module 3. When it needs to be played, the DSP audio and video processor can also retrieve the saved sound signal and save the sound The signal is transmitted to the external speakers for playback, which can be used in classrooms and conference rooms to facilitate the recording of course content or meeting content; the integrated switch has a built-in switch module, which can interact with the PC through the network, and the PC control interface can be used for The input and output channels of the all-in-one machine are set for a series of parameters such as equalization, feedback cancellation, echo cancellation, noise cancellation, etc.; through the built-in Bluetooth module 81 or WiFi module 82, it can be connected to a mobile phone or PAD to realize music or video playback; through USB The recording and broadcasting module 3 automatically reads and selects MP3, WAV format audio files and video files in the U disk or other storage devices to play; through the GPIO module 9, it can be used for input or output, and can control the alarm or alarm connected to it. External equipment such as electric curtains.

Although the preferred embodiments of the present invention are described in detail above, it should be clearly understood that for those skilled in the art, the present invention can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

An adaptive pickup integrated machine control system, which is characterized in that it includes a DSP audio and video processor, at least one microphone audio input module, a USB recording and broadcasting module, and a power supply. The power supply provides a working voltage for the control system. The microphone The audio input module is used to pick up the user's sound signal and send the sound signal to the DSP audio and video processor, and output the sound signal processed by the DSP audio and video processor to an external speaker;

The USB recording and broadcasting module can save the sound signal processed by the DSP audio and video processor, and the DSP audio and video processor can retrieve the sound signal saved by the USB recording and broadcasting module, or retrieve the sound signal inserted in the USB recording The data information in the data storage device on the broadcasting module is then output to the external speaker.
The adaptive pickup integrated machine control system according to claim 1, characterized in that it further comprises a Dante module and a POE switch module connected to each other, the Dante module is connected to the DSP audio and video processor, and the Dante module Receive the digital signal output by the DSP audio and video processor and transmit the digital signal to the POE switch module, and the POE switch module outputs the digital signal to the external POE speaker.
The adaptive pickup integrated machine control system according to claim 1, characterized in that it further comprises a D/A conversion module connected to the DSP audio and video processor, and the D/A conversion module receives the DSP audio and video processing The digital signal output by the amplifier and the digital signal is converted into an analog signal and then output to the passive speaker.
The adaptive pickup integrated machine control system according to claim 1, further comprising a video recording and broadcasting module connected with the DSP audio and video processor, the video recording and broadcasting module can pick up and save the images in the environment, The DSP audio and video processor can simultaneously retrieve the audio signal saved by the USB recording and broadcasting module and the image information saved by the video recording and broadcasting module, and then synchronously process the audio and video and output them to an external speaker and an external video player, respectively.
The adaptive pickup integrated machine control system according to any one of claims 1-4, wherein each of the microphone audio input modules includes at least one microphone module and an A/D conversion module, and the microphone module The analog signal of the picked-up sound is output to the A/D conversion module, and the A/D conversion module converts the analog signal into a digital signal and then transmits it to the DSP audio and video processor.
The adaptive pickup integrated machine control system according to claim 5, further comprising a central control panel, the central control panel realizes interaction with the DSP audio and video processor through the chip RS232.
The adaptive pickup integrated machine control system according to claim 5, characterized in that it further comprises a Bluetooth module and a WiFi module connected to the DSP audio and video processor, and the Bluetooth module and the WiFi module use radio technology to perform digital audio data input of.
The adaptive pickup integrated machine control system according to claim 5, characterized in that it further comprises a GPIO module, which can be used to input or output control commands.
The adaptive pickup integrated machine control system according to claim 5, wherein the USB recording and broadcasting module includes a sound card main chip circuit, a vibrating circuit, and a USB communication circuit, and both the vibrating circuit and the USB communication circuit are Connected with the main sound card chip circuit, the oscillating circuit includes a crystal oscillator, which can generate a clock oscillation frequency, thereby ensuring the normal operation of the USB sound card chip in the main sound card circuit.
The adaptive pickup integrated machine control system according to claim 1, wherein the DSP audio processing module includes an expansion unit, an equalization unit, an automatic gain unit, a matrix mixing unit, a feedback/echo/noise cancellation unit, Delay unit, frequency division unit, filter unit and limiter unit.