CN113411719B

CN113411719B - Microphone cascade system, microphone and terminal

Info

Publication number: CN113411719B
Application number: CN202110672294.2A
Authority: CN
Inventors: 叶坚坚
Original assignee: Hangzhou Hikvision Digital Technology Co Ltd
Current assignee: Hangzhou Hikvision Digital Technology Co Ltd
Priority date: 2021-06-17
Filing date: 2021-06-17
Publication date: 2022-03-04
Anticipated expiration: 2041-06-17
Also published as: CN113411719A

Abstract

The embodiment of the invention provides a microphone cascade system, a microphone and a terminal, relating to the technical field of communication equipment.A first sub-microphone is connected with other sub-microphones in series through respective second network communication modules and network cables according to a preset sequence; each sub-microphone acquires a first audio data packet sent by the next microphone through the second network communication module; sending a first audio data packet to a front microphone and a second audio data packet acquired based on a network transmission audio protocol; the master microphone acquires a third audio data packet sent by the first sub-microphone from the first interface through the first network communication module; based on a network transmission audio protocol, obtaining a mixed audio data packet according to the third audio data packet and the collected first audio data, and sending the mixed audio data packet to a preset terminal from the second interface; and the preset terminal acquires the mixed audio data packet through the third network communication module. The compatibility of the microphone cascade system can be improved.

Description

Microphone cascade system, microphone and terminal

Technical Field

The invention relates to the technical field of communication equipment, in particular to a microphone cascade system, a microphone and a terminal.

Background

The microphone, as a device for picking up sound, can convert a sound signal transmitted from the sound inlet into audio data, and further can transmit the audio data to a playback device (e.g., a speaker), and the playback device can play the sound corresponding to the audio data.

In some scenarios, multiple microphones may be required to pick up sound in the scenario, for example, in large conference rooms, hotel corridors, each requiring multiple microphones to be installed. In one approach, multiple microphones may be cascaded to be placed in a corresponding scene.

However, in the related art, the cable for cascading the plurality of microphones is a private cable provided by the provider, and accordingly, the interface for cascading in the arranged microphones is also a private interface defined by the provider, which may result in low compatibility of the arranged microphone cascading system.

Disclosure of Invention

The embodiment of the invention aims to provide a microphone cascade system, a microphone and a terminal so as to improve the compatibility of the microphone cascade system. The specific technical scheme is as follows:

in a first aspect, to achieve the above object, an embodiment of the present invention discloses a microphone cascade system, including: the system comprises a main microphone, a plurality of sub-microphones and a preset terminal;

the master microphone is provided with a first network communication module, each sub-microphone is provided with a second network communication module, and the preset terminal is provided with a third network communication module; the master microphone is respectively connected with the first sub-microphone and the preset terminal through the first network communication module and a network cable; the first sub-microphone and other sub-microphones are connected in series through respective second network communication modules and network cables according to a preset sequence;

each sub-microphone is used for acquiring a first audio data packet sent by a microphone connected with the sub-microphone in the preset sequence through the second network communication module; sending the first audio data packet to a previous microphone connected with the first audio data packet in the preset sequence and a second audio data packet acquired based on a network transmission audio protocol;

the mother microphone is configured to obtain, through the first network communication module, a third audio data packet sent by the first child microphone from a first interface; based on a network transmission audio protocol, obtaining a mixed audio data packet according to the third audio data packet and the collected first audio data, and sending the mixed audio data packet to the preset terminal from a second interface;

and the preset terminal is used for acquiring the mixed audio data packet from the master microphone through the third network communication module.

Optionally, the interface of the sub-microphones and the first interface are non-standard RJ45 interfaces including independent power supply pins.

Optionally, the second interface is a standard RJ45 interface.

Optionally, a power receiving circuit module is further disposed in the parent microphone, and a power supplying circuit module is further disposed in the preset terminal; the power supply end circuit module is used for supplying electric quantity to the power receiving end circuit module;

the power receiving end circuit module is respectively connected with the first interface and the second interface; the second interface is also used for being coupled with the power supply end circuit module.

Optionally, the primary microphone is connected to the preset terminal through the first network communication module, a network cable, and a switch.

Optionally, the primary microphone is connected to the preset terminal through the first network communication module and a network cable.

Optionally, the first network communication module includes a first switch chip; the master microphone is also provided with a first digital signal processing chip;

the primary microphone is configured to obtain the third audio data packet from the first interface through the first switch chip, and send the third audio data packet to the first digital signal processing chip; restoring the third audio data packet into audio data based on a network transmission audio protocol through the first digital signal processing chip, combining the acquired first audio data to obtain a mixed audio data packet, and sending the mixed audio data packet to the first switching chip; and sending the mixed audio data packet to the preset terminal from a second interface through the first exchange chip.

Optionally, the first network communication module includes a second digital signal processing chip, and the second digital signal processing chip has a first network port and a second network port;

the primary microphone is used for acquiring the third audio data packet from the first interface through the first internet access of the second digital signal processing chip, restoring the third audio data packet into audio data based on a network transmission audio protocol, combining the acquired first audio data to obtain a mixed audio data packet, and sending the mixed audio data packet to the preset terminal from the second interface through the second internet access of the second digital signal processing chip.

Optionally, a first sound pickup is further disposed in the female microphone;

the primary microphone is used for converting the acquired sound signals into first audio data through the first sound pickup and sending the first audio data to a digital signal processing chip in the primary microphone.

Optionally, the second network communication module includes a second switch chip; each sub-microphone is also provided with a second sound pick-up and a third digital signal processing chip;

each sub-microphone is used for converting the acquired sound signal into second audio data through the second sound pickup and sending the second audio data to the third digital signal processing chip; converting, by the third digital signal processing chip, the second audio data into a second audio data packet based on a network transport audio protocol, and sending the second audio data packet to the second switching chip; and sending the second audio data packet to the previous microphone connected with the second audio data packet in the preset sequence through the second exchange chip.

Optionally, a speaker is further disposed in the mother microphone and each of the child microphones;

the preset terminal is also used for sending an audio data packet to be processed to the master microphone;

the primary microphone is further used for acquiring the audio data packet to be processed through the first network communication module; restoring the audio data packet to be processed into audio data to be processed based on a network transmission audio protocol; playing the audio data to be processed through a loudspeaker; sending the audio data packets to be processed from the first interface to each sub-microphone through the first network communication module;

each sub-microphone is further configured to acquire, through the second network communication module, the to-be-processed audio data packet from a microphone that is connected to the sub-microphone in the preset sequence; restoring the audio data packet to be processed into audio data to be processed based on a network transmission audio protocol; playing the audio data to be processed through a loudspeaker; and sending the audio data packet to be processed to the next microphone connected with the second network communication module in the preset sequence through the second network communication module.

Optionally, the microphone cascade system further includes: a switch and an audio processing device;

each mother microphone and a plurality of child microphones connected in series with the mother microphone form a microphone cascade subsystem;

the mother microphone in each microphone cascade subsystem is connected with the switch through a network cable;

each primary microphone is used for sending a mixed audio data packet containing audio data acquired by the primary microphone and audio data acquired from a secondary microphone connected in series with the primary microphone to the audio processing equipment through the switch;

and the audio processing equipment is used for processing and storing the received mixed audio data packet.

In a second aspect, in order to achieve the above object, an embodiment of the present invention discloses a mother microphone, where a first network communication module is disposed in the mother microphone, and the mother microphone is respectively connected to a first sub-microphone of a plurality of sub-microphones and a preset terminal through the first network communication module and a network cable; the first sub-microphone is connected with other sub-microphones in series through network cables according to a preset sequence;

the mother microphone is configured to obtain, through the first network communication module, a third audio data packet sent by the first child microphone from a first interface; the third audio data packet comprises: each sub-microphone is collected based on a network transmission audio protocol and sends an audio data packet to the previous microphone connected with the sub-microphone in the preset sequence;

based on a network transmission audio protocol, obtaining a mixed audio data packet according to the third audio data packet and the collected first audio data;

and sending the mixed audio data packet to the preset terminal from a second interface.

In a third aspect, in order to achieve the above object, an embodiment of the present invention discloses a target sub-microphone, where the target sub-microphone is provided with a second network communication module, and the target sub-microphone and other sub-microphones are connected in series through their respective second network communication modules and network cables according to a preset sequence; a first sub-microphone in each sub-microphone is connected with the mother microphone through a network cable;

the target sub-microphone is used for acquiring a first audio data packet sent by a next microphone connected with the target sub-microphone in the preset sequence through a second network communication module of the target sub-microphone;

and sending the first audio data packet to a previous microphone connected with the first audio data packet in the preset sequence and sending a second audio data packet acquired based on a network transmission audio protocol, so that the first sub-microphone sends a third audio data packet to the main microphone, the main microphone obtains a mixed audio data packet based on the network transmission audio protocol according to the third audio data packet and the acquired first audio data, and the mixed audio data packet is sent to a preset terminal from a second interface.

In a fourth aspect, in order to achieve the above object, an embodiment of the present invention discloses a terminal, where the terminal is coupled to a mother microphone through a third network communication module and a network cable, the mother microphone is provided with a first network communication module, and the mother microphone is coupled to a first sub-microphone of a plurality of sub-microphones through the first network communication module and the network cable; the first sub-microphone is connected with other sub-microphones in series through network cables according to a preset sequence;

the terminal is used for acquiring a mixed audio data packet from the master microphone through the third network communication module; the mixed audio data packet is obtained by the parent microphone based on a network transmission audio protocol according to a third audio data packet and the collected first audio data and is sent to the terminal; the third audio data packet comprises: each sub-microphone is collected based on a network transmission audio protocol and transmits an audio data packet to the previous microphone connected with the sub-microphone in the preset sequence

The embodiment of the invention has the following beneficial effects:

the microphone cascade system provided by the embodiment of the invention comprises: the system comprises a main microphone, a plurality of sub-microphones and a preset terminal; the master microphone is provided with a first network communication module, each sub-microphone is provided with a second network communication module, and the preset terminal is provided with a third network communication module; the master microphone is respectively connected with the first sub-microphone and the preset terminal through the first network communication module and the network cable; the first sub-microphone and other sub-microphones are connected in series through respective second network communication modules and network cables according to a preset sequence; each sub-microphone is used for acquiring a first audio data packet sent by a next microphone connected with the sub-microphone in a preset sequence through the second network communication module; sending a first audio data packet to a previous microphone connected with the first audio data packet in a preset sequence and a second audio data packet acquired based on a network transmission audio protocol; the master microphone is used for acquiring a third audio data packet sent by the first sub-microphone from the first interface through the first network communication module; based on a network transmission audio protocol, obtaining a mixed audio data packet according to the third audio data packet and the collected first audio data, and sending the mixed audio data packet to a preset terminal from a second interface; and the preset terminal is used for acquiring the mixed audio data packet from the master microphone through the third network communication module.

In the microphone cascade system provided by the embodiment of the invention, because each microphone supports a protocol based on network transmission audio, and each microphone is connected through the network cable, audio data can be transmitted through the network to realize cascade, that is, the microphone cascade system can be arranged through a standard network cable without a private cable provided by a supplier, and can acquire the audio data collected by each microphone through a preset terminal, thereby improving the compatibility of the microphone cascade system.

Of course, not all of the advantages described above need to be achieved at the same time in the practice of any one product or method of the invention.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other embodiments can be obtained by referring to these drawings.

Fig. 1 is an architecture diagram of a microphone cascade system according to an embodiment of the present invention;

fig. 2 is an architecture diagram of another microphone cascade system provided by the embodiment of the present invention;

fig. 3 is an architecture diagram of another microphone cascade system provided by the embodiment of the present invention;

fig. 4 is an architecture diagram of another microphone cascade system provided by the embodiment of the present invention;

fig. 5 is an architecture diagram of another microphone cascade system provided by the embodiment of the present invention;

fig. 6 is an architecture diagram of another microphone cascade system provided by the embodiment of the present invention;

fig. 7 is an architecture diagram of another microphone cascade system provided by the embodiment of the present invention;

fig. 8 is a logic diagram illustrating processing of audio data by a microphone cascade system according to an embodiment of the present invention;

fig. 9 is an architecture diagram of another microphone cascade system provided by the embodiment of the present invention;

fig. 10 is a data flow diagram between a parent microphone and a child microphone according to an embodiment of the present invention;

fig. 11 is a data flow diagram between a terminal and a parent microphone according to an embodiment of the present invention;

fig. 12 is a schematic layout diagram of a microphone cascade system according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived from the embodiments given herein by one of ordinary skill in the art, are within the scope of the invention.

An embodiment of the present invention provides a microphone cascade system, and referring to fig. 1, fig. 1 is an architecture diagram of a microphone cascade system provided in an embodiment of the present invention, where the microphone cascade system may include: a mother microphone 101, a plurality of child microphones, and a preset terminal 102. The embodiment of the present invention is described by taking the case of including two sub-microphones (the sub-microphone 103 and the sub-microphone 104) as an example, but is not limited thereto.

The parent microphone 101 is provided with a first network communication module 1011, and each child microphone is provided with a second network communication module (including a second network communication module 1031 and a second network communication module 1041). The preset terminal 102 is provided with a third network communication module 1021. The mother microphone 101 is connected to the first child microphone (i.e. the child microphone 103) and the default terminal 102 through the first network communication module 1011 and the network cable. The first sub-microphone and other sub-microphones are connected in series through respective second network communication modules and network cables according to a preset sequence.

Each sub-microphone is used for acquiring a first audio data packet sent by a next microphone connected with the sub-microphone in a preset sequence through the second network communication module; and sending a first audio data packet to a previous microphone connected with the first microphone in a preset sequence, and transmitting a second audio data packet acquired based on a network transmission audio protocol.

And the master microphone is used for acquiring a third audio data packet sent by the first sub-microphone from the first interface through the first network communication module, obtaining a mixed audio data packet according to the third audio data packet and the acquired first audio data based on a network transmission audio protocol, and sending the mixed audio data packet to the preset terminal from the second interface.

In the microphone cascade system provided by the embodiment of the invention, because each microphone supports a protocol based on network audio transmission, and the microphones are connected through the network cable, audio data can be transmitted through the network, so as to realize cascade. That is to say, the microphone cascade system can be arranged through a standard network cable, and the audio data collected by each microphone can be acquired through a preset terminal without a private cable provided by a supplier, so that the compatibility of the microphone cascade system can be improved.

The sub-microphones do not distinguish uplink and downlink interfaces, are convenient to install and use on site, transmit audio signals through a network, have strong anti-interference capability, can be encrypted, prevent packets from being lost and have high voice data security.

In an embodiment, the network transmission Audio Protocol may be AOIP (Audio Over Internet Protocol, Audio Protocol based on network transmission), and may also be other protocols based on network transmission Audio signals, which is not limited to this.

In one embodiment, each network communication module may have a forwarding netlist and each microphone may have a respective IP address during transmission of the audio data, and the audio data packets may be forwarded based on the netlist and the IP addresses of the microphones.

It can be understood that, because the sub-microphones are connected in series, the destination IP address of the audio data packet sent by each sub-microphone is the IP address of the parent microphone, and other sub-microphones receiving the audio data packet determine that the audio data packet needs to be sent to the parent microphone according to the destination IP address, and then continue to forward the audio data packet. Until the first child microphone forwards the audio data packet to the parent microphone.

In one embodiment, the order of the serial connection between the sub-microphones is not limited, and it is only necessary to ensure that the sub-microphones are connected in series in sequence and finally connected to the mother microphone.

In one embodiment, if the predetermined terminal and each microphone are located in the same scene, the predetermined terminal may send the mixed audio data packet to another device (e.g., a remote sound playing device) for playing.

If the preset terminal and each microphone are not located in the same scene, the preset terminal can also restore the mixed audio data packet to audio data for playing based on the network transmission audio protocol directly.

In addition, the microphone cascade system is arranged by using the standard network cables, the types of cables in an engineering field can be reduced, the workload and risk of wiring in the engineering field are reduced, the network is used for transmitting audio data, the anti-interference capability is high, the encryption can be realized, the packet loss can be prevented, and the safety of voice data is high.

For the microphone cascade system, each microphone and the preset terminal can be connected through a respective interface. The network communication module of each microphone may be interfaced therewith.

The first interface is the interface of the mother microphone connected with the first child microphone, and the second interface is the interface of the mother microphone connected with the preset terminal.

In one embodiment, the interface for coupling in the parent microphone and each of the child microphones may be a standard RJ (Registered Jack) 45 interface. For example, a standard hectogram RJ45 interface contains 8 PINs (including PIN1-PIN8), where PIN1 is TX (Transmit Data) +, indicating the positive end of Data transmission; PIN2 is TX-representing the negative terminal of data transmission; PIN3 is RX (Receive Data) +, indicating the positive end of Data reception; PIN6 is RX-, which represents the negative side of data reception. And PIN1, PIN2, PIN3, and PIN6 are responsible for power supply at the same time. PIN4, PIN5, PIN7, and PIN8 are undefined PINs in a hundred mega network.

In one embodiment, the interface in the plurality of sub-microphones and the first interface may be a non-standard RJ45 interface including independent power pins.

For example, referring to table (1), table (1) shows the line order definition for the non-standard RJ45 interface.

Watch (1)

RJ45 PIN	Definition of line order	Description of functions
			PIN1	TX+	Standard hundred million network, data transmission, positive terminal
PIN2	TX-	Standard hundred million network, data transmission, negative terminal
			PIN3	RX+	Standard hundred million network, data receiving, positive terminal
PIN4	VCC	Supply, 12V
			PIN5	VCC	Supply, 12V
PIN6	RX-	Standard hundred million network, data receiving, negative terminal
			PIN7	GND	Ground wire, GND
PIN8	GND	Ground wire, GND

As can be seen from table (1), in the non-standard RJ45 interface, PIN1 is TX +, indicating the positive terminal of data transmission; PIN2 is TX-representing the negative terminal of data transmission; PIN3 is RX +, representing the positive terminal for data reception; PIN6 is RX-, which represents the negative terminal for data reception; PIN4 and PIN5 are used for power supply; PIN7 and PIN8 are ground terminals.

If the interface and the first interface in each sub-microphone all adopt the standard RJ45 interface, in order to realize the Power supply to the mother microphone and each sub-microphone based on the Power Over Ethernet (POE), a PD (Power Device, Power supply side circuit module) -PSE (Power Sourcing Equipment, Power receiving side circuit module) -PD-PSE form series Power supply circuit needs to be set in the mother microphone and each sub-microphone, and the Power supply to the mother microphone and each sub-microphone is provided through the series Power supply circuit.

The power supply in the above manner needs to set a diode in each sub-microphone circuit, and the diode of each stage generates a tube voltage drop, so that the voltage of each receiving terminal circuit module is gradually decreased, and power loss is generated. In addition, when the power is supplied by adopting the above manner, two interfaces in the sub-microphone respectively correspond to the power receiving end circuit module and the power supply end circuit module, which increases the layout complexity of the microphone cascade system.

Correspondingly, based on the microphone cascade system provided by the embodiment of the invention, the interfaces and the first interface in the plurality of sub-microphones are non-standard RJ45 interfaces including independent power supply pins, and the power supply pins and the pins for transmitting data are mutually independent, so that electric quantity can be directly acquired between the mother microphone and each sub-microphone through the power supply pins, diodes do not need to be arranged in each sub-microphone, and further, power loss can be reduced.

In one embodiment, the second interface is a standard RJ45 interface.

The second interface is a standard RJ45 interface, that is, the interface of the female microphone for connecting the predetermined terminal is a standard RJ45 interface.

Therefore, the primary and secondary microphones are packaged into a standard microphone on the logic layer, the use of the whole set of primary and secondary microphone system is simplified, the primary and secondary microphone system can be used as a standard network transmission audio microphone to be connected to other network transmission audio systems, and the usable range of the microphone cascade system provided by the embodiment of the invention can be expanded.

In one embodiment, the female microphone may support standard POE powering. Correspondingly, a receiving end circuit module can be arranged in the female microphone, and a power supply end circuit module can be arranged in the preset terminal. The receiving end circuit module is respectively connected with the first interface and the second interface; the second interface is also used for being connected with the power supply end circuit module.

And the power supply end circuit module is used for supplying electric quantity to the power receiving end circuit module.

In the embodiment of the invention, the female microphone supports standard POE power supply, and the power supply can be supplied to the female microphone by the butting preset terminal supporting the PSE power supply. The receiving end circuit module can be further connected with the first interface, so that each sub-microphone can acquire electric quantity from the main microphone through the interface of the sub-microphone.

Based on this, can break through the point-to-point restriction of supplying power of POE single route, realize that a POE port supplies power for a plurality of microphones, simplified the wiring scheme of engineering scene.

In one embodiment, the pins for supplying power in the two interfaces of one sub-microphone may be directly connected, and then, after each sub-microphone is cascaded to the mother microphone, each sub-microphone may obtain power.

Therefore, the microphone cascade system provided by the embodiment of the invention can break through the limitation of POE single-path point-to-point power supply, realize that one POE port supplies power to a plurality of microphones, and further simplify the wiring of an engineering field.

In addition, in order to improve the power supply capacity of the primary microphone to the secondary microphone and enable the primary microphone to be in butt joint with non-POE terminal equipment, an independent external 12V adapter power supply interface can be further arranged in the primary microphone, and a user can select and match an adapter with required power to be connected with the power supply interface.

When the total power consumption of the mother microphone and the son microphones exceeds the upper limit of the power which can be provided by the power supply end circuit module of the preset terminal, or when the mother microphone is in butt joint with non-POE terminal equipment, the mother microphone can also supply power to the mother microphone and all the son microphones by connecting an external 12V adapter.

In addition, in the microphone cascade system provided in the embodiment of the present invention, the number of cascaded sub-microphones is not limited. Specifically, the upper limit of the number of sub-microphones may be determined based on the following information: the upper limit of the number of available IP addresses, the upper limit of the bandwidth between the parent microphone and the first child microphone, the upper limit of the power consumption of the power supply of the PSE and the power supply which can be provided by the external adapter of the parent microphone, and the upper limit of the decoding capability of the parent microphone.

That is, the number of IP addresses of each device in the microphone cascade system does not exceed the upper limit of the number of available IP addresses, the maximum bandwidth that can be achieved between the parent microphone and the first child microphone does not exceed the upper limit of bandwidth, the total power consumption of the parent microphone and the child microphones does not exceed the upper limit of the total power consumption that can be provided by the PSE power supply and the external adapter of the parent microphone, and the number of child microphones does not exceed the upper limit of network transmission audio data packets that can be decoded by the parent microphone.

Referring to fig. 2, fig. 2 is an architecture diagram of a microphone cascade system according to an embodiment of the present invention.

DC12V represents an external 12V adapter power interface. The power supply interface and the PD are respectively connected with the first interface. A plurality of diodes may also be included in the circuit. The PSE is connected with an interface (which may be referred to as a third interface) in the predetermined terminal, and then, power can be provided for the primary microphone through the PSE and the PD, and each secondary microphone can also obtain power through its own interface.

Aiming at two modes of POE power supply and external adapter power supply, the internal part of the female microphone is isolated through a diode, so that the backward flow of the power supply between the two power supplies can be avoided, and the power supply safety coefficient of the whole microphone cascade system is improved.

In one embodiment, the female microphone is coupled with the preset terminal through the first network communication module and the network cable.

In the embodiment of the present invention, the second interface may also be connected to an interface (i.e., a third interface) in the preset terminal through a network cable. So, through the second interface, female microphone can obtain the electric quantity from the power supply end circuit module in presetting the terminal based on receiving end circuit module, and each sub-microphone also can obtain the electric quantity through the interface of self.

In one embodiment, the parent microphone is coupled to the default terminal through the first network communication module, the network cable, and the switch.

In this embodiment of the present invention, the second interface may also be connected to an interface (i.e., a third interface) in the preset terminal through the switch. So, through the second interface, female microphone can obtain the electric quantity from the power supply end circuit module in presetting the terminal based on receiving end circuit module, and each sub-microphone also can obtain the electric quantity through the interface of self.

In addition, a parent microphone and a plurality of child microphones connected in series may form a link, and accordingly, the switch may be connected to a plurality of parent microphones, that is, the switch may be connected to a plurality of links, as shown in fig. 3.

In fig. 3, the terminal connected to the switch is the default terminal in the embodiment of the present invention. The switch may couple three parent microphones (parent microphone a, parent microphone B, and parent microphone C), each of which constitutes a link (in fig. 3, link a, link B, and link C) with a plurality of child microphones connected in series. Based on the architecture shown in fig. 3, the range of the microphone cascade can be further expanded, and the method can be applied to scenes with larger range.

Based on the architecture shown in fig. 3, if each microphone is provided with a sound pickup and a speaker, the microphone can be used in different scenes. For example, the method can be used in medium and large conference rooms and video conference rooms which need large-scale and multi-path sound pickup, and in the scenes, sound pickup and sound reproduction are used for remote talkback and local sound reinforcement. The public area that also can be used for needs public address on a large scale, pickup such as school teaching building corridor, hospital waiting area and corridor, hotel corridor, bank office hall etc. the public address is used for the broadcast notice in this kind of scene, and the pickup is used for the security protection control. The system can also be used for long-strip-shaped vehicles such as buses, trains, motor trains, high-speed rails and cruise ships, and in the scenes, the public address is used for broadcasting notification, and the pickup is used for security monitoring.

In one embodiment, the first network communication module includes a first SWITCH chip; the mother microphone may further include a first Digital Signal Processing (DSP) chip.

The master microphone is used for acquiring a third audio data packet from the first interface through the first exchange chip and sending the third audio data packet to the first digital signal processing chip; restoring the third audio data packet into audio data based on a network transmission audio protocol through the first digital signal processing chip, combining the acquired first audio data to obtain a mixed audio data packet, and sending the mixed audio data packet to the first exchange chip; and sending the mixed audio data packet from the second interface to the preset terminal through the first exchange chip.

In the embodiment of the present invention, each sub-microphone and the preset terminal may also be provided with a digital signal processing chip, and the IP addresses of the first digital signal processing chip and the digital signal processing chips in each sub-microphone and the preset terminal may belong to the same network segment.

Correspondingly, referring to fig. 4, the first SWITCH chip in the parent microphone may be a SWITCH chip (i.e., SWITCH 0 layer), and in addition, a digital signal processing chip (i.e., parent MIC DSP), i.e., the first digital signal processing chip in the embodiment of the present invention, may also be disposed in the parent microphone. The second network communication module in each sub-microphone may also include a SWITCH chip (i.e., SWITCH 1 layer-SWITCH n layer), and each sub-microphone may also be provided with a digital signal processing chip (i.e., sub-MIC DSP). The microphones transmit audio data packets through the SWITCH chip, and the audio data packets can be uploaded to the respective digital signal processing chips. The master microphone can transmit audio data packets with a digital signal processing chip (i.e., a terminal DSP) of a preset terminal through a SWITCH chip.

In one embodiment, the first network communication module includes a second digital signal processing chip having a first portal and a second portal.

Correspondingly, the female microphone is used for acquiring a third audio data packet from the first interface through the first internet access of the second digital signal processing chip, restoring the third audio data packet into audio data based on a network transmission audio protocol, combining the acquired first audio data to obtain a mixed audio data packet, and sending the mixed audio data packet to the preset terminal from the second interface through the second internet access of the second digital signal processing chip.

In the embodiment of the present invention, the parent microphone may also forward the audio data packet through the digital signal processing chip (i.e., the second digital signal processing chip). The first internet access and the IP addresses of the digital signal processing chips of the sub-microphones can belong to the same network segment, and the second internet access and the IP addresses of the digital signal processing chips in the preset terminal can belong to the same network segment.

For example, referring to fig. 5, the digital signal processing chip of the parent microphone may transmit audio data packets with the switching chip of each child microphone through the first network port; and transmitting the audio data packet between the second network port and the digital signal processing chip of the terminal.

In one embodiment, a first sound pickup may be further provided in the female microphone.

And the primary microphone is used for converting the acquired sound signal into first audio data through the first sound pick-up and sending the first audio data to a digital signal processing chip in the primary microphone.

In the embodiment of the present invention, the parent microphone may convert the acquired sound signal into audio data (i.e., first audio data) by the first sound pickup. Furthermore, the first audio data can be converted into an audio data packet based on a network transmission audio protocol through the first digital signal processing chip.

In addition, the first digital signal processing chip may also perform preprocessing on the first audio data based on audio processing algorithms such as AGC (Automatic Gain Control), AEC (Acoustic Echo canceller), and ANS (Automatic Noise Suppression).

For example, referring to fig. 6, a first sound pickup 1013 may also be provided in the parent microphone 101. The first network communication module includes a first switch chip 10111, and the mother microphone 101 is further provided with a first digital signal processing chip 1012. In addition, the second network communication module in each sub-microphone may include a switching chip, and each sub-microphone may also be provided with a sound pickup and a digital signal processing chip.

In one embodiment, the second network communication module may include a second switch chip; each sub-microphone is also provided with a second sound pick-up and a third digital signal processing chip.

Each sub-microphone is used for converting the acquired sound signal into second original audio data through a second sound pick-up and sending the second audio data to a third digital signal processing chip; converting the second audio data into a second audio data packet based on a network transmission audio protocol through a third digital signal processing chip, and sending the second audio data packet to a second exchange chip; and sending a second audio data packet to the previous microphone connected with the second audio data packet in the preset sequence through the second exchange chip.

In the embodiment of the present invention, the third digital signal processing chip may also perform preprocessing on the second audio data based on audio processing algorithms such as AGC (Automatic Gain Control, Automatic Gain compensation function), AEC (Acoustic Echo canceller), and ANS (Automatic Noise Suppression, background Noise Suppression function). In addition, the third digital signal processing chip can also perform noise reduction processing on the second audio data.

For example, referring to fig. 6, the second network communication module 1031 of the sub-microphone 103 may include a second switching chip 10311; the second network communication module 1041 of the sub-microphone 104 may include a second switch chip 10411. A second sound pick-up 1033 and a third digital signal processing chip 1032 are also arranged in the sub microphone 103; the sub-microphone 104 is also provided with a second sound pickup 1043 and a third digital signal processing chip 1042.

In one embodiment, a speaker may be further disposed in the parent microphone and each of the child microphones,

and the preset terminal is also used for sending the audio data packet to be processed to the master microphone.

The master microphone is also used for acquiring the audio data packet to be processed through the first network communication module; restoring the audio data packet to be processed into audio data to be processed based on a network transmission audio protocol; playing audio data to be processed through a loudspeaker; and transmitting the audio data packets to be processed from the first interface to each sub-microphone through the first network communication module.

Each sub-microphone is also used for acquiring an audio data packet to be processed from the previous microphone connected with the sub-microphone in the preset sequence through the second network communication module; restoring the audio data packet to be processed into audio data to be processed based on a network transmission audio protocol; playing audio data to be processed through a loudspeaker; and sending the audio data packet to be processed to the next microphone connected with the second network communication module in the preset sequence through the second network communication module.

In the embodiment of the present invention, the preset terminal may also send an audio data packet (i.e., a to-be-processed audio data packet) to the parent microphone. Correspondingly, the mother microphone can convert the audio data into audio data after receiving the audio data packet to be processed, and the audio data can be played through the loudspeaker. In addition, the audio data packets to be processed can be forwarded to each sub-microphone through the first network communication module.

For example, the parent microphone may broadcast and transmit the pending audio packets to the respective child microphones, or may unicast and transmit the pending audio packets to each child microphone.

In one mode, when the first network communication module includes the first switch chip, the female microphone may acquire the audio data packet to be processed from the preset terminal through the first switch chip and upload the audio data packet to the first digital signal processing chip, and then the first digital signal processing chip may restore the audio data packet to be processed into audio data and send the audio data packet to the speaker for playing.

In another mode, if the first network communication module includes a second digital signal processing chip, and the second digital signal processing chip has a first network port and a second network port, the primary microphone may obtain the audio data packet to be processed from the preset terminal through the second network port, recover the audio data packet to be processed into audio data, and play the audio data packet through the speaker. And forwarding the audio data packet to be processed to each sub-microphone through the first internet access.

It can be understood that the first sub-microphone may obtain the audio data packet to be processed through the second network communication module, and restore the audio data packet to be played. In addition, the first sub-microphone can also send the audio data packet to be processed to the next sub-microphone in the preset sequence through the second network communication module according to the network table and the destination IP address of the audio data packet to be processed.

Similarly, the latter sub-microphone may also convert the audio data packet to be processed into audio data for playing, and send the audio data packet to be processed to the latter sub-microphone in the preset sequence through the second network communication module according to the network table and the destination IP address of the audio data packet to be processed until the last sub-microphone acquires the audio data packet to be processed, and restore the audio data packet to be processed into audio data for playing.

In addition, the first digital signal processing chip can convert the audio data to be processed from a single channel into spatial stereo audio data with different phases based on a spatial algorithm according to the position of each sub-microphone, and respectively issues the spatial stereo audio data to different sub-microphones, so that the sound played by each sub-microphone presents a certain spatial sense.

Referring to fig. 7, a sound pick-up and a speaker (i.e., a loudspeaker) may be disposed in each of the mother microphone and each of the child microphones, and the audio data may be transmitted to the loudspeaker through the digital signal processing chip and played through the loudspeaker. The sound pick-up can send the audio data that picks up to digital signal processing chip, obtains the audio data package by digital signal processing chip based on network transmission audio protocol, and sends to the SWTICH chip for the retransmission.

Based on the architecture shown in fig. 7, the master microphone can uniformly manage all the child microphones, including: and (4) developing functions of sub-microphone discovery, IP address allocation, management, upgrading, synchronous cooperation, loss reconnection and the like. For the terminal, no matter how many sub microphones are, the sub microphones are invisible, and the terminal only directly communicates with the mother microphone, so that the workload of the terminal can be simplified, and other terminal products can conveniently interface with the microphone cascade system provided by the embodiment of the invention.

In one embodiment, the preset terminal may further include a digital signal processing chip (may be referred to as a fourth digital signal processing chip). And the fourth digital signal processing chip is used for acquiring the uploaded audio data packet from the master microphone and sending the audio data packet to be processed to each microphone. For example, referring to fig. 6, the third network communication module 1021 in the preset terminal 102 may include a fourth digital signal processing chip 10211.

Referring to fig. 8, fig. 8 is a logic diagram illustrating processing of audio data by a microphone cascade system according to an embodiment of the present invention.

Each sub-microphone can acquire the audio data packet sent by the next microphone connected with the sub-microphone in the preset sequence, and send the audio data packet and the audio data packet collected by the sub-microphone to the previous microphone connected with the sub-microphone in the preset sequence. It will be appreciated that the last sub-microphone (i.e. sub-microphone 4) only transmits audio data packets collected by itself to the first microphone.

Furthermore, the master microphone can acquire the audio data packets collected by the child microphones, obtain mixed audio data packets by combining the audio data collected by the master microphone with the audio data collected by the master microphone, and send the mixed audio data packets to the preset terminal.

The preset terminal may also send the audio data packet to be processed to the parent microphone, and the parent microphone may play based on the audio data packet to be processed and send the audio data packet to be processed to the first child microphone (i.e., the child microphone 1).

The child-mother microphone 1 can play based on the audio data packet to be processed, and send the audio data packet to be processed to the second child microphone (i.e. child microphone 2). Similarly, the child-mother microphone 2 may play based on the audio data packet to be processed, and send the audio data packet to be processed to the third child microphone (i.e., the child microphone 3). And (4) until the primary and secondary microphones 4 acquire the audio data packet to be processed, and playing the audio data packet.

In one embodiment, the microphone cascade system further comprises: a switch and an audio processing device;

each primary microphone is used for sending a mixed audio data packet containing audio data acquired by the primary microphone and audio data acquired from a secondary microphone connected in series with the primary microphone to audio processing equipment through a switch;

For example, referring to fig. 9, fig. 9 is an architecture diagram of a microphone cascade system according to an embodiment of the present invention.

The microphone cascade system comprises four links, wherein one link corresponds to one microphone cascade subsystem. Specifically, the link corresponding to the mother microphone a, the mother microphone B, the mother microphone C and the mother microphone D is included. For example, different links may be distributed in different scenarios (e.g., floors). Each microphone in the same link may be deployed in the same scene.

In fig. 9, the audio intelligent processor may obtain the mixed audio data packets uploaded by each of the mother microphones through the switch, restore the mixed audio data packets to audio data, and process the audio data based on an audio processing algorithm. The audio intelligent processor can also send audio data packets to be processed to each mother microphone. The storage server is used for storing the audio data packets.

Referring to fig. 10, fig. 10 is a data flow diagram between a parent microphone and a child microphone according to an embodiment of the present invention.

And in the sub-microphone, the audio data is acquired by the local microphone and is sent to the digital signal processing chip. And the digital signal processing chip performs coding and packaging based on an AOIP protocol to obtain an audio data packet, and sends the audio data packet to the master microphone through a data link layer and a physical layer.

The mother microphone receives the audio data packet uploaded by the child microphone through the physical layer and the data link layer, and the audio data packet is uploaded to the digital signal processing chip. And decoding the audio data packet (namely recovering the audio data) by the digital signal processing chip based on the AOIP protocol, wherein each sub-microphone corresponds to one decoding channel and is used for decoding the audio data packet uploaded by the sub-microphone.

The master microphone acquires audio data through the local microphone and sends the audio data to the digital signal processing chip. And the digital signal processing chip is combined with the audio data uploaded by the sub-microphone to perform audio mixing processing to obtain mixed audio data, the mixed audio data is encoded and packaged based on an AOIP protocol to obtain a mixed audio data packet, and then the mixed audio data packet can be sent to the terminal through a data link layer and a physical layer.

The mother microphone can also receive audio data packets to be processed issued by the terminal, and decode the audio data packets based on the AOIP protocol to obtain audio data to be processed, and then the audio data can be played through the local loudspeaker. In addition, the audio data to be processed can also be used as reference audio data for local echo cancellation. The parent microphone may also forward pending audio data packets to the child microphone.

The sub-microphone receives the audio data packet to be processed and sends the audio data packet to the digital signal processing chip. And decoding by the digital signal processing chip based on the AOIP protocol to obtain audio data to be processed, and playing the audio data through a local loudspeaker. The audio data to be processed can also be used as reference audio data for local echo cancellation.

Referring to fig. 11, fig. 11 is a data flow diagram between a terminal and a parent microphone according to an embodiment of the present invention.

In the master microphone, audio data are acquired through the local microphone and sent to the digital signal processing chip. And the digital signal processing chip performs sound mixing on the acquired audio data and the audio data sent by the sub-microphone based on an AOIP protocol, encodes and packages the audio data to obtain a mixed audio data packet, and sends the mixed audio data packet to the terminal through a data link layer and a physical layer.

The terminal can obtain the mixed audio data packet and upload the mixed audio data packet to the digital signal processing chip. And decoding the mixed audio data packet by the digital signal processing chip based on the AOIP protocol to obtain mixed audio data. The mixed audio data may also be uploaded to other devices (e.g., a remote sound playing device).

Similarly, the terminal can also acquire audio data to be processed from other devices, and the digital signal processing chip performs encoding and packaging based on the AOIP protocol to obtain an audio data packet to be processed, and sends the audio data packet to the parent microphone through the data link layer and the physical layer.

Correspondingly, the master microphone can acquire the audio data packet to be processed, decode the audio data packet based on the AOIP protocol to obtain the audio data to be processed, and then play the audio data through the local loudspeaker. In addition, the audio data to be processed can also be used as reference audio data for local echo cancellation.

Referring to fig. 12, fig. 12 is a schematic layout diagram of a microphone cascade system according to an embodiment of the present invention.

The layout of the microphone cascade system may be determined based on the current scenario. For example, in fig. 12, if only one microphone is required, the microphone may be directly arranged at a position where sound collection is required. If two or more microphones are required, the microphones can be arranged in series according to the orientation of an object (e.g., a table) in the scene, so that the microphones are uniformly distributed in the scene.

Corresponding to the microphone cascade system shown in fig. 1, an embodiment of the present invention further provides a parent microphone, where a first network communication module is disposed in the parent microphone, and the parent microphone is respectively connected to a first child microphone of a plurality of child microphones and a preset terminal through the first network communication module and a network cable; the first sub-microphone is connected with other sub-microphones in series through the network cable according to a preset sequence.

The master microphone is used for acquiring a third audio data packet sent by the first sub-microphone from the first interface through the first network communication module; the third audio data packet comprises: each sub-microphone is collected based on a network transmission audio protocol and transmits an audio data packet to the previous microphone connected with the sub-microphone in a preset sequence; based on a network transmission audio protocol, obtaining a mixed audio data packet according to the third audio data packet and the collected first audio data; and sending the mixed audio data packet to the preset terminal from the second interface.

Corresponding to the microphone cascade system shown in fig. 1, an embodiment of the present invention further provides a target sub-microphone, where the target sub-microphone is provided with a second network communication module, and the target sub-microphone is connected in series with other sub-microphones through the respective second network communication modules and network cables according to a preset sequence; a first one of the respective sub-microphones is coupled to the parent microphone by a network cable.

The target sub-microphone is used for acquiring a first audio data packet sent by a next microphone connected with the target sub-microphone in a preset sequence through a second network communication module of the target sub-microphone; and sending a first audio data packet to a previous microphone connected with the previous microphone in a preset sequence and a second audio data packet acquired based on a network transmission audio protocol, so that the first child microphone sends a third audio data packet to the parent microphone, so that the parent microphone obtains a mixed audio data packet based on the network transmission audio protocol according to the third audio data packet and the acquired first audio data, and sends the mixed audio data packet to a preset terminal from the second interface.

Corresponding to the microphone cascade system shown in fig. 1, an embodiment of the present invention further provides a terminal, where the terminal is connected to a parent microphone through a third network communication module and a network cable, the parent microphone is provided with a first network communication module, and the parent microphone is connected to a first child microphone of a plurality of child microphones through the first network communication module and the network cable; the first sub-microphone is connected with other sub-microphones in series through the network cable according to a preset sequence.

The terminal is used for acquiring the mixed audio data packet from the master microphone through the third network communication module; the mixed audio data packet is obtained by the primary microphone based on a network transmission audio protocol according to the third audio data packet and the collected first audio data and is sent to the terminal; the third audio data packet comprises: and each sub-microphone acquires the audio data packet based on the network transmission audio protocol and sends the audio data packet to the previous microphone connected with the sub-microphone in the preset sequence.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the invention to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, as for the microphone and terminal embodiments, since they are substantially similar to the system embodiments, the description is simple, and the relevant points can be referred to the partial description of the method embodiments.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims

1. A microphone cascade system, comprising: the system comprises a main microphone, a plurality of sub-microphones and a preset terminal;

the preset terminal is used for acquiring the mixed audio data packet from the master microphone through the third network communication module;

the mother microphone and each son microphone are also provided with a loudspeaker;

2. The microphone cascading system of claim 1, wherein the interface of the plurality of sub-microphones and the first interface are non-standard RJ45 interfaces that include independent power pins.

3. The microphone cascade system of claim 1, wherein the second interface is a standard RJ45 interface.

4. The microphone cascading system as claimed in claim 3, wherein a power receiving circuit module is further disposed in the parent microphone, and a power supplying circuit module is further disposed in the default terminal; the power supply end circuit module is used for supplying electric quantity to the power receiving end circuit module;

5. The microphone cascading system of claim 1, wherein the female microphone is coupled to the predetermined terminal through the first network communication module, a network cable, and a switch.

6. The microphone cascading system of claim 1, wherein the female microphone is coupled to the default terminal through the first network communication module and a network cable.

7. The microphone cascading system of claim 1, wherein the first network communication module comprises a first switch chip; the master microphone is also provided with a first digital signal processing chip;

8. The microphone cascading system of claim 1, wherein the first network communication module comprises a second digital signal processing chip having a first port and a second port;

9. The microphone cascading system as claimed in claim 7 or 8, wherein a first pickup is further disposed in the female microphone;

10. The microphone cascading system of claim 1, wherein the second network communication module comprises a second switching chip; each sub-microphone is also provided with a second sound pick-up and a third digital signal processing chip;

11. The microphone cascade system of claim 1, further comprising: a switch and an audio processing device;

12. A master microphone is characterized in that a first network communication module is arranged in the master microphone, and the master microphone is respectively connected with a first sub-microphone in a plurality of sub-microphones and a preset terminal through the first network communication module and a network cable; the first sub-microphone is connected with other sub-microphones in series through network cables according to a preset sequence;

sending the mixed audio data packet to the preset terminal from a second interface;

each sub-microphone is also used for acquiring the audio data packet to be processed from the previous microphone connected with the sub-microphone in the preset sequence through a second network communication module of the sub-microphone; restoring the audio data packet to be processed into audio data to be processed based on a network transmission audio protocol; playing the audio data to be processed through a loudspeaker; and sending the audio data packet to be processed to the next microphone connected with the microphone in the preset sequence through a second network communication module of the microphone.

13. The target sub-microphone is characterized in that a second network communication module is arranged in the target sub-microphone, and the target sub-microphone and other sub-microphones are connected in series through respective second network communication modules and network cables according to a preset sequence; a first sub-microphone in each sub-microphone is connected with the mother microphone through a network cable;

sending the first audio data packet to a previous microphone connected with the previous microphone in the preset sequence and a second audio data packet acquired based on a network transmission audio protocol, so that the first sub-microphone sends a third audio data packet to the main microphone, the main microphone obtains a mixed audio data packet according to the third audio data packet and the acquired first audio data based on the network transmission audio protocol, and the mixed audio data packet is sent to a preset terminal from a second interface;

the primary microphone is also used for acquiring the audio data packet to be processed through a first network communication module; restoring the audio data packet to be processed into audio data to be processed based on a network transmission audio protocol; playing the audio data to be processed through a loudspeaker; sending the audio data packets to be processed from the first interface to each sub-microphone through the first network communication module;

14. A terminal is characterized in that the terminal is connected with a mother microphone through a third network communication module and a network cable, a first network communication module is arranged in the mother microphone, and the mother microphone is connected with a first sub-microphone in a plurality of sub-microphones through the first network communication module and the network cable; the first sub-microphone is connected with other sub-microphones in series through network cables according to a preset sequence;

the terminal is used for acquiring a mixed audio data packet from the master microphone through the third network communication module; the mixed audio data packet is obtained by the parent microphone based on a network transmission audio protocol according to a third audio data packet and the collected first audio data and is sent to the terminal; the third audio data packet comprises: each sub-microphone is collected based on a network transmission audio protocol and sends an audio data packet to the previous microphone connected with the sub-microphone in the preset sequence;

the terminal is also used for sending an audio data packet to be processed to the master microphone;