CN116582798A - Microphone acoustic system based on wireless honeycomb collection technology - Google Patents
Microphone acoustic system based on wireless honeycomb collection technology Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R5/00—Stereophonic arrangements
- H04R5/04—Circuit arrangements, e.g. for selective connection of amplifier inputs/outputs to loudspeakers, for loudspeaker detection, or for adaptation of settings to personal preferences or hearing impairments
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04R5/00—Stereophonic arrangements
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- H—ELECTRICITY
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- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2205/00—Details of stereophonic arrangements covered by H04R5/00 but not provided for in any of its subgroups
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Abstract
The invention discloses a microphone acoustic system based on a wireless honeycomb integrated technology, which is provided with a wireless transceiver (100) and a plurality of omnidirectional microphone boxes (1-N). The wireless transceiver is connected with a computer terminal (200); the wireless transceiver transmits audio signals to the computer terminal and receives audio signals from the computer terminal; the plurality of omnidirectional microphone boxes (1-N) are provided with numbers, every four omnidirectional microphone boxes form a group, the omnidirectional microphone box with a certain number is in wireless communication with any other numbered omnidirectional microphone boxes closest to the omnidirectional microphone box, so that a one-to-many microphone conference system is realized, and the plurality of one-to-many microphone conference systems are in wireless interconnection to form a wireless honeycomb set-connected microphone acoustic system.
Description
Technical Field
The invention relates to the technology of the communication field, in particular to a microphone acoustic system based on a wireless honeycomb set connection technology.
Background
Currently, a wireless conference system is a conference system that performs audio data transmission and conference process management based on a wireless communication protocol. Because the wireless conference system does not need complicated wiring, each wireless conference unit is powered by a battery, can move at will and are mutually independent, and has high flexibility and maintainability for the wired conference system; in the market of wireless conference products, wireless conference products are continuously emerging, common wireless conference products comprise WiFi, U sections, infrared and the like, and along with the continuous improvement of the market cognition of a wireless conference system, the wireless conference becomes a main angle of the conference system.
The invention patent with the application number of 202210495111.9 discloses a data communication method and a system suitable for a 5.8G-WiFi conference system, wherein an independent router of the 5.8G-WiFi conference system and a 5.8G-WiFi unit adopt an Internet group management protocol to realize a pair of multicast communication; the independent router copies and forwards the multicast data to all 5.8G-WiFi units in the multicast group; the independent router sends the data packet count value and the time stamp to a 5.8G-WiFi unit, and judges whether data frame loss exists or not according to the comparison result of the received data packet count value; and calculating the time difference between the playing time and the collecting time according to the time stamp, adjusting the ADC sampling speed according to the difference between the current time difference and the last time difference, and updating the last time difference into the current time difference. According to the technical scheme, the signal synchronization of voice acquisition and voice playing is realized without increasing hardware cost, so that the voice quality can be effectively improved, and the user experience is improved.
The invention patent with application number 202111122343.1 discloses a wireless conference audio transmission method, a wireless conference audio transmission system, a wireless conference audio transmission device and a wireless conference audio transmission medium, wherein the wireless conference audio transmission method comprises the steps of configuring a sound card drive through a wireless unit, starting a DMA (direct memory access) double cache to sample audio data, and obtaining sampled data; a speaking request is sent to a conference system host through a wireless unit, and when the request passes, a server IP address distributed by the wireless transmitting host is received; when the sampling data reach the preset number, triggering an interrupt server function to generate a receiving interrupt signal; according to the receiving interrupt signal, sending the sampled data to a message queue, receiving the sampled data in the message queue in a blocking mode through a message queue processing thread, and converting the sampled data into sound decibels.
The 202210495111.9 patent is based on that an independent router of a 5.8G-WiFi conference system and a 5.8G-WiFi unit adopt an internet group management protocol to realize a pair of multicast communications, which is equivalent to only a downlink communication method, and does not propose in detail how to realize uplink communication of each 5.8G-WiFi unit, and a method for transmitting data to the independent router; the 202111122343.1 patent is a communication between a single wireless unit and a wireless transmitting host, which is equivalent to a more traditional conference microphone or a communication mode between a traditional Bluetooth headset and a mobile phone, and cannot be applied to a large conference system.
Disclosure of Invention
In view of the foregoing, the present invention aims at overcoming the drawbacks of the prior art, and it is a primary object of the present invention to provide a microphone acoustic system based on a wireless cellular set-up technology, which can be applied to a large conference place to realize wireless communication.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a microphone acoustic system based on wireless honeycomb integrated technology comprises
A wireless transceiver connected with the computer terminal; the wireless transceiver transmits audio signals to the computer terminal and receives audio signals from the computer terminal; the wireless transceiver is internally provided with a first wireless transceiver chip;
a plurality of omnidirectional microphone boxes, wherein each omnidirectional microphone box is internally provided with a second wireless transceiver chip, and is in wireless communication with the first wireless transceiver chip through the second wireless transceiver chip;
the plurality of omnidirectional microphone boxes at least comprise a No. 1, a No. 2, a No. 3 and a No. 4 omnidirectional microphone boxes, wherein the No. 2, the No. 3 and the No. 4 omnidirectional microphone boxes surround the No. 1 and are three speakers closest to the No. 1 omnidirectional microphone boxes, and when the No. 2, the No. 3 and the No. 4 omnidirectional microphone boxes communicate with the No. 1 at the same time, the No. 1 omnidirectional microphone boxes are formed to receive audio signals of the No. 2, the No. 3 and the No. 4 omnidirectional microphone boxes;
the plurality of omnidirectional microphone boxes further comprise a No. 5 omnidirectional microphone box and a No. 6 omnidirectional microphone box, wherein the No. 1 omnidirectional microphone box, the No. 5 omnidirectional microphone box and the No. 6 omnidirectional microphone box surround the No. 2, are three speakers closest to the No. 2 omnidirectional microphone box, and form the No. 2 omnidirectional microphone box to receive audio signals of the No. 1 omnidirectional microphone box, the No. 5 omnidirectional microphone box and the No. 6 omnidirectional microphone box when the No. 1 omnidirectional microphone box, the No. 5 omnidirectional microphone box and the No. 6 omnidirectional microphone box communicate with the No. 2 simultaneously;
the plurality of omnidirectional microphone boxes further comprise a No. 7 omnidirectional microphone box and a No. 8 omnidirectional microphone box, wherein the No. 1 omnidirectional microphone box, the No. 7 omnidirectional microphone box and the No. 8 omnidirectional microphone box surround the periphery of the No. 3 microphone box and are three speakers closest to the No. 3 omnidirectional microphone box, and when the No. 1 omnidirectional microphone box, the No. 7 omnidirectional microphone box and the No. 8 omnidirectional microphone box communicate with the No. 3 microphone box at the same time, the No. 3 omnidirectional microphone box is formed to receive audio signals of the No. 1 omnidirectional microphone box, the No. 7 omnidirectional microphone box and the No. 8 omnidirectional microphone box;
the plurality of omnidirectional microphone boxes further comprise a No. 9 omnidirectional microphone box and a No. 10 omnidirectional microphone box, wherein the No. 1 omnidirectional microphone box, the No. 9 omnidirectional microphone box and the No. 10 omnidirectional microphone box surround the periphery of the No. 4 microphone box and are three speakers closest to the No. 4 omnidirectional microphone box, and when the No. 1 omnidirectional microphone box, the No. 9 omnidirectional microphone box and the No. 10 omnidirectional microphone box communicate with the No. 4 microphone box at the same time, the No. 4 omnidirectional microphone box is formed to receive audio signals of the No. 1 omnidirectional microphone box, the No. 9 omnidirectional microphone box and the No. 10 omnidirectional microphone box;
the plurality of omnidirectional microphone boxes are provided with numbers, the omnidirectional microphone box with a certain number is in wireless communication with any three omnidirectional microphone boxes with other numbers at the nearest distance, and a wireless honeycomb integrated microphone acoustic system is formed.
Compared with the prior art, the invention has obvious advantages and beneficial effects, in particular, as can be seen from the technical scheme, the invention comprises a wireless transceiver and a plurality of omnidirectional microphone boxes, wherein the wireless transceiver is internally provided with a first wireless transceiver chip; each omnidirectional microphone is internally provided with a second wireless transceiver chip, and the second wireless transceiver chip is in wireless communication with the first wireless transceiver chip. Wireless communication is realized, and the method can be applied to large conference places. The voice can be synchronously played in a large-scale meeting place, and the sound picked up by microphones at different positions of the meeting place can be effectively and clearly collected.
According to the invention, the plurality of omnidirectional microphone boxes (1-N) are provided with numbers, every four omnidirectional microphone boxes form a group, one numbered omnidirectional microphone box is in wireless communication with any three other numbered omnidirectional microphone boxes closest to the omnidirectional microphone boxes, so that a one-to-three microphone conference system is realized, and the plurality of one-to-three microphone conference systems are in wireless interconnection to form a wireless honeycomb set-connected microphone acoustic system. The wireless transceiver is sequentially connected with three main omnidirectional microphone boxes according to the sound loudness order of the main omnidirectional microphone boxes through an ad hoc network routing protocol. And in the time T1, the wireless transceiver communicates with the first-access main omnidirectional microphone, the first-communication link is turned off after the communication is completed, when the communication with the middle-access main omnidirectional microphone is jumped to the time T2, the middle-communication link is turned off after the communication is completed, and when the communication with the rear-access main omnidirectional microphone is jumped to the time T3, the communication with the rear-access main omnidirectional microphone is started. And in this way, the chip of the wireless transceiver continuously scans and communicates with the main omnidirectional microphone boxes with the top three sound loudness ranks on the microphone acoustic system.
The wireless transceiver and the plurality of omnidirectional microphones of the system are based on self-defined wireless chips, communication adopts an ad hoc network communication protocol, and the self-adaptive frequency hopping technology is combined, so that one wireless transceiver drags a plurality of omnidirectional microphone boxes, and meanwhile, the synchronization of audio transmission is achieved, and the noise reduction effect is achieved.
In order to more clearly illustrate the structural features and efficacy of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and examples.
Drawings
FIG. 1 is an enlarged partial view of a system architecture according to an embodiment of the present invention.
FIG. 2 is a block diagram of a system architecture according to an embodiment of the present invention.
Fig. 3 is a block diagram of the internal circuit of the omni-directional speaker boxes No. 1, no. 2 and No. 3 according to the embodiment of the present invention.
The attached drawings are used for identifying and describing:
100. wireless transceiver 200, computer terminal.
Detailed Description
Referring to fig. 1 to 3, a specific structure of a preferred embodiment of the present invention is shown, which is a microphone acoustic system based on a wireless honeycomb set-up technology, comprising a wireless transceiver 100 and a plurality of omni-directional microphone boxes.
The wireless transceiver is connected with the computer terminal 200; the wireless transceiver receives the audio signals from the computer terminal and sends the audio signals to all the omnidirectional microphone boxes; and the wireless transceiver is also used for receiving the audio signals picked up by the omnidirectional microphone and sending the audio signals to the far end of the computer terminal. The wireless transceiver 100 is internally provided with a first wireless transceiver chip, each omnidirectional microphone is internally provided with a second wireless transceiver chip, and the second wireless transceiver chip is in wireless communication with the first wireless transceiver chip, so that the traditional wired data signal transmission mode is replaced.
In application, for example, the wireless transceiver 100 may be plugged into a USB interface of the computer terminal 200 in a USB manner, so as to realize audio signal transmission. In one embodiment, the wireless transceiver 100 may be in the form of a U-shield, plug and play. The omni-directional speaker boxes can be manufactured into a canister lamp shape, and are uniformly and intermittently arranged on the ceiling of the conference room to form an omni-directional speaker box array. Furthermore, 4 microphones are uniformly arranged in the circumferential direction of each omnidirectional microphone box, and one microphone is arranged in every 90 degrees in the circumferential direction to form a microphone array, so that sounds in 360 degrees in different directions in the circumferential direction in the conference room can be better collected.
In a meeting, the conference assistant places the computer terminal 200 (which may be a notebook computer, for example) on a conference table, and then connects the wireless transceiver 100 to the computer terminal 200 in a plug-in manner. The network administrator first lays out the same network IP address in the conference room: 210.1.1.100 the subnet mask is 255.255.255.224. In downlink communication, since the wireless transceiver 100 and all the omnidirectional microphone boxes are located in the same network IP address, a pair of all the broadcasting communication modes can be implemented between the wireless transceiver 100 and all the omnidirectional microphone boxes, the wireless transceiver 100 broadcasts the audio signal from the computer terminal 200, and each omnidirectional microphone box in the network performs unconditional copying on the signal sent by the wireless transceiver 100 and plays the sound to the meeting place. All the omnidirectional microphone boxes can receive all the information and play the sound synchronously.
In this embodiment, the plurality of omni-directional speaker boxes at least include No. 1, no. 2, no. 3, and No. 4 omni-directional speaker boxes, where No. 2, no. 3, and No. 4 omni-directional speaker boxes surround around No. 1 and are three speakers closest to the No. 1 omni-directional speaker boxes, and the No. 2, no. 3, and No. 4 omni-directional speaker boxes simultaneously communicate with the No. 1 omni-directional speaker boxes to form a small communication system in which the No. 1 omni-directional speaker boxes receive audio signals of the No. 2, no. 3, and No. 4 omni-directional speaker boxes;
in addition, the plurality of omni-directional speaker boxes further at least comprise a No. 5 omni-directional speaker box and a No. 6 omni-directional speaker box, wherein the No. 1 omni-directional speaker box, the No. 5 omni-directional speaker box and the No. 6 omni-directional speaker box surround the No. 2 speaker box and are three speakers closest to the No. 2 omni-directional speaker box, and the No. 1 omni-directional speaker box, the No. 5 omni-directional speaker box and the No. 2 omni-directional speaker box are simultaneously communicated with the No. 2 speaker box to form a small communication system for the No. 2 omni-directional speaker box to receive audio signals of the No. 1 omni-directional speaker box, the No. 5 omni-directional speaker box and the No. 6 omni-directional speaker box;
the plurality of omnidirectional microphone boxes further at least comprise a No. 7 omnidirectional microphone box and a No. 8 omnidirectional microphone box, wherein the No. 1 omnidirectional microphone box, the No. 7 omnidirectional microphone box and the No. 8 omnidirectional microphone box are surrounded around the No. 3 speaker, and are three speakers closest to the No. 3 omnidirectional microphone box, and the No. 1 omnidirectional microphone box, the No. 7 omnidirectional microphone box and the No. 8 omnidirectional microphone box are communicated with the No. 3 speaker at the same time, so that a small communication system for receiving audio signals of the No. 1 omnidirectional microphone box, the No. 5 omnidirectional microphone box and the No. 6 omnidirectional microphone box by the No. 3 omnidirectional microphone boxes is formed;
the plurality of omnidirectional microphone boxes further comprise a No. 9 omnidirectional microphone box and a No. 10 omnidirectional microphone box, wherein the No. 1 omnidirectional microphone box, the No. 9 omnidirectional microphone box and the No. 10 omnidirectional microphone box are surrounded around the No. 4 microphone box and are three speakers closest to the No. 4 omnidirectional microphone box, and the No. 1 omnidirectional microphone box, the No. 9 omnidirectional microphone box and the No. 10 omnidirectional microphone box are simultaneously communicated with the No. 4 microphone box to form a small communication system for the No. 4 omnidirectional microphone box to receive audio signals of the No. 1 omnidirectional microphone box, the No. 5 omnidirectional microphone box and the No. 6 omnidirectional microphone box;
further, as shown in fig. 2, there may be more omni-directional speaker boxes, such as No. 11, no. 12, no. 13, no. 14, etc., allowing up to several tens of hundreds of omni-directional speaker boxes to be deployed on larger venues. The plurality of omnidirectional microphone boxes are provided with numbers, the omnidirectional microphone box with a certain number is in wireless communication with any three omnidirectional microphone boxes with other numbers closest to the omnidirectional microphone box, and a wireless honeycomb integrated microphone acoustic system is formed.
As shown in fig. 2, in one embodiment, each four omni-directional microphone boxes form a group, one numbered omni-directional microphone communicates with the other three numbered omni-directional microphone boxes simultaneously to realize a one-to-three microphone conference system, and a plurality of one-to-three microphone conference systems form a wireless honeycomb set-connected microphone acoustic system.
When the No. 2, the No. 3 and the No. 4 omnidirectional microphone boxes upload respective audio signals to the No. 1 omnidirectional microphone boxes during uplink communication, an ad hoc network communication protocol is adopted, and an adaptive frequency hopping technology is combined, so that the audio signals are uploaded to the No. 1 omnidirectional microphone boxes in a time-division multi-frequency manner;
similarly, the uplink communication modes of the No. 2 omnidirectional microphone and the No. 1, no. 5 and No. 6 omnidirectional microphone are the same as the uplink communication modes of the No. 1, no. 2, no. 3 and No. 4 omnidirectional microphone; the uplink communication mode between the 4 omni-directional microphone boxes which are closest to each other and formed by any combination is the same as that of the 1 # omni-directional microphone boxes, the 2 # omni-directional microphone boxes, the 3 # omni-directional microphone boxes and the 4 # omni-directional microphone boxes.
In the communication of the invention, the system does not designate one omni-directional microphone box for communication with the wireless transceiver, and in the microphone acoustic system of the wireless honeycomb set connection, any one omni-directional microphone box can be used as a main omni-directional microphone box for communication with the wireless transceiver. The communication protocol of the invention defines the uplink communication and executes the communication rule according to the following modes:
among the 4 closest omni-directional speaker boxes in the self-grouping mode formed by any combination, the omni-directional speaker box with the largest sound loudness is defined as a main omni-directional speaker box, and the other three closest omni-directional speaker boxes around the main omni-directional speaker box are called auxiliary omni-directional speaker boxes; the main omnidirectional speaker box is in wireless communication with the first wireless transceiver chip of the wireless transceiver 100 through the built-in second wireless transceiver chip thereof, and the three auxiliary omnidirectional speaker boxes are in wireless communication with the second wireless transceiver chip of the main omnidirectional speaker box through the built-in second wireless transceiver chip thereof. Therefore, from among the 4 omni-directional microphone boxes in the group, the signal transmitted to the wireless transceiver 100 by the uplink communication of the main omni-directional microphone box includes the audio signal collected by itself, and also carries the audio signals collected by other auxiliary omni-directional microphone boxes.
In the present invention, the wireless transceiver 100 communicates with three of the main omni-directional speaker boxes at a time through an ad hoc network routing protocol. For example, when the system recognizes that the sound loudness of three main omni-directional speaker boxes in different locations is greater than the sound loudness of other main omni-directional speaker boxes in a meeting place, the three main omni-directional speaker boxes are ordered according to the sound loudness, and the three main omni-directional speaker boxes are arranged in the following order: the master omni-directional speaker is first accessed, the master omni-directional speaker is middle accessed, and the master omni-directional speaker is later accessed, and the three master omni-directional speakers are sequentially used for uploading audio signals to the wireless transceiver 100 in the time periods of T1/T2 and T3.
The wireless transceiver 100 sequentially connects three master omni-directional speaker boxes according to the order of the sound loudness of each master omni-directional speaker box through an ad hoc network routing protocol. In the time T1, the wireless transceiver 100 communicates with the first-access master omni-directional speaker, and after completing communication, the link for the first communication is turned off, when the time is skipped to the time T2, the communication with the second-access master omni-directional speaker is turned on, after completing communication, the link for the second-access master omni-directional speaker is turned off, and when the time is skipped to the time T3, the communication with the second-access master omni-directional speaker is turned on. With this cycle, the chip of the wireless transceiver 100 continuously scans and communicates with the top three primary omni-directional microphone boxes on the microphone acoustic system.
One application is as follows:
as shown in fig. 2, assuming that the fixed audio signal is set to Sn, n is the number of the corresponding microphone, when the sound loudness picked up by the No. 1 omni-directional speaker is monitored to be the largest in all the omni-directional speaker in the meeting place in the period of T, the sound loudness picked up by the No. 20 omni-directional speaker is second largest, and the sound loudness picked up by the No. 30 omni-directional speaker is third largest, the audio signal formulas of the terminals of the system of the present invention are as follows:
s100=s1+s20+s30, the audio signal received by the wireless transceiver 100 in the T period is the sum of the meeting place sounds picked up by the No. 1, no. 20 and No. 30 omnidirectional microphone boxes;
s1=s1+s2+s3+s4; the audio signal of the up-link communication of the No. 1 omnidirectional microphone is the No. 1 omnidirectional microphone, and also comprises the sum of meeting place sounds picked up by the No. 2 omnidirectional microphone, the No. 3 omnidirectional microphone and the No. 4 omnidirectional microphone which surround the audio signal;
s20=s20+s19+s21+s11: the audio signal of the up communication of the No. 20 omnidirectional microphone is the No. 20 omnidirectional microphone, and also comprises the sum of meeting place sounds picked up by the No. 19 omnidirectional microphone, the No. 21 omnidirectional microphone and the No. 11 omnidirectional microphone which surround the audio signal;
s30=s30+s29+s31+s24: the audio signal of the up communication of the No. 30 omnidirectional microphone is the No. 30 omnidirectional microphone, and also comprises the sum of meeting place sounds picked up by the No. 29 omnidirectional microphone, the No. 31 omnidirectional microphone and the No. 24 omnidirectional microphone which surround the audio signal;
equivalently, within the T period, the wireless transceiver 100 picks up s1+s2+s3+s4; s20+s19+s21+s11; and the three groups of S30+S29+S31+S24 are all audio signals picked up by 12 omnidirectional microphone boxes. In this way, on one hand, sound of different positions of the meeting place is allowed to be synchronously uploaded, a clear pickup effect can be achieved no matter how far or near the seat is built in the large-scale meeting place, on the other hand, a plurality of omnidirectional microphone boxes are allowed to uplink communication data to one integrated first wireless transceiver chip of the same wireless transceiver 100 at a time, and high-efficiency processing of data volume is achieved.
Another application is as follows:
as shown in fig. 2, assuming that the fixed audio signal is set to Sn, n is the number of the corresponding microphone, when the sound loudness picked up by the No. 1 omni-directional speaker is monitored to be the largest in all the omni-directional speaker in the meeting place in the period of T, the sound loudness picked up by the No. 6 omni-directional speaker is second largest, and the sound loudness picked up by the No. 9 omni-directional speaker is third largest; the No. 2 omnidirectional microphone can upload own sound to the No. 1 omnidirectional microphone and also can upload own sound to the No. 6 omnidirectional microphone as one; the No. 4 omnidirectional microphone can upload own sound to the No. 1 omnidirectional microphone and also can upload own sound to the No. 9 omnidirectional microphone as one; the No. 11 omnidirectional microphone can upload own sound to the No. 6 omnidirectional microphone and also can upload own sound to the No. 9 omnidirectional microphone as one; the following audio signal transmission formula is adopted:
when S1> S6, the 3 auxiliary omni-directional speaker boxes surrounding the omni-directional speaker box 1 preferentially add the picked-up audio signals to the omni-directional speaker box 1 with the largest sound loudness; only when the sound loudness picked up by the No. 1 omnidirectional speaker is reduced to be lower than that picked up by the No. 6 omnidirectional speaker, the No. 2 omnidirectional speaker can break communication with the No. 1 omnidirectional speaker and switch to communication with the No. 6 omnidirectional speaker;
similarly, when S1> S9, the No. 4 omnidirectional microphone can communicate with the No. 1 omnidirectional microphone all the time, and the picked-up audio signal is uploaded to the No. 1 omnidirectional microphone; only when the sound picked up by the No. 1 omnidirectional speaker is reduced to be lower than the sound picked up by the No. 9 omnidirectional speaker, the No. 4 omnidirectional speaker is disconnected from the No. 1 omnidirectional speaker and is switched to communicate with the No. 9 omnidirectional speaker;
and the same is done; when S6> S9, the No. 11 omnidirectional microphone can communicate with the No. 6 omnidirectional microphone all the time, and the picked-up audio signal is uploaded to the No. 6 omnidirectional microphone; only when the sound picked up by the No. 6 omnidirectional microphone is reduced to the lower sound loudness picked up by the No. 9 omnidirectional microphone, the No. 11 omnidirectional microphone disconnects the communication with the No. 6 omnidirectional microphone and switches to the communication with the No. 9 omnidirectional microphone; thus, the first and second substrates are bonded together,
when S1> S6> S9,
s100=s1+s6+s9 the audio signal received by the wireless transceiver 100 in the T period is the sum of the meeting place sounds picked up by the omni-directional microphone boxes No. 1, no. 6 and No. 9;
s1=s1+s2+s3+s4: the audio signal of the up-link communication of the No. 1 omnidirectional microphone is the No. 1 omnidirectional microphone, and also comprises the sum of meeting place sounds picked up by the No. 2 omnidirectional microphone, the No. 3 omnidirectional microphone and the No. 4 omnidirectional microphone which surround the audio signal;
s6=s6+s11+s17: the audio signal of the up communication of the No. 6 omnidirectional microphone is the No. 6 omnidirectional microphone, and also comprises the sum of meeting place sounds picked up by the No. 11 omnidirectional microphone and the No. 17 omnidirectional microphone which surround the audio signal; the meeting place sound picked up by the No. 2 omnidirectional microphone is uploaded by the No. 1 omnidirectional microphone, and the sound is not uploaded by the No. 6 omnidirectional microphone any more;
s9=s9+s15: the audio signal of the up communication of the No. 9 omnidirectional microphone is the No. 9 omnidirectional microphone, and also comprises the sound picked up by the No. 15 omnidirectional microphone around the audio signal; the meeting place sound picked up by the No. 4 omnidirectional microphone is uploaded by the No. 1 omnidirectional microphone, and is not uploaded by the No. 9 omnidirectional microphone any more; the meeting place sound picked up by the No. 11 omnidirectional microphone is uploaded by the No. 6 omnidirectional microphone, and is not uploaded by the No. 9 omnidirectional microphone any more.
Equivalently, within the T period, the wireless transceiver 100 picks up s1+s2+s3+s4; s6+s11+s17; and S9+S15, wherein the three groups are 9 audio signals picked up by the omnidirectional microphone.
As shown in fig. 3, each omnidirectional microphone box can also operate independently, and the omnidirectional microphone box itself relies on 4 silicon microphones to form a microphone array, and forms an acoustic beam-form by matching with a DSP algorithm, so that the omnidirectional microphone box has the communication functions of remote pickup, echo cancellation, ambient noise cancellation, double talk and the like.
As shown in fig. 3, the audio module structure of each omni-directional speaker includes: recording thread, receiving thread and playing thread. The omnidirectional microphone comprises a microphone body, a microphone body and a microphone body, wherein the microphone body comprises a microphone body, a microphone body and a microphone body, and the microphone body comprises a microphone body, a microphone body and a microphone body.
Recording thread: the audio is collected by the microphone, see the dotted line path in fig. 3, and after being collected, the audio is buffered to a certain length and sent to a voice signal processor for audio processing, wherein the audio mainly comprises EC, AGC, NS and the like. Then sending the packets to a wireless transmission channel, encoding the packets by an audio encoder and a decoder, packaging the packets into Rtp packets, and sending the Rtp packets through a second wireless transmission module;
receiving a thread: referring to the thickened path in fig. 3, the broadcast receiving module is responsible for receiving the audio packet sent from the far end, that is, the audio packet sent from the wireless transceiver 100, the decoder decapsulates the Rtp packet, decodes the audio data, and sends the decoded audio data to the buffering module for buffering.
Playing the thread: responsible for headphone sound playback, see the solid line path in fig. 3. The playing thread gets the audio data to be played in the audio mixer, firstly, the audio frames stored in the buffer module in the wireless transmission channel participating in the conversation are sequentially obtained, and the decoder can perform AGC and NS processing on the audio frames; then the audio signals of a plurality of wireless transmission channels are mixed by the audio mixer to obtain mixed audio, the mixed audio is transmitted to the voice signal processor for remote analysis, and finally the mixed audio is played by the loudspeaker of the sound box.
Each omnidirectional microphone is provided with a voice signal processor, the voice signal processor sets a sound loudness threshold value X, when the sound loudness acquired by a certain group of omnidirectional microphone is greater than the threshold value X, the main omnidirectional microphone of the group of 4 omnidirectional microphone automatically opens a communication mode and is interconnected with the wireless transceiver 100, and when the sound loudness acquired by other self-group omnidirectional microphone does not exceed the threshold value X, the main omnidirectional microphone is not interconnected with the wireless transceiver 100. For example, in one application example, when the loudness of the sound collected by the main omni-directional speaker is greater than the threshold value of 40 db, the main omni-directional speaker is turned on for communication with the wireless transceiver 100, and below the threshold value of 40 db, the main omni-directional speaker is in a standby state and cannot be awakened for communication with the wireless transceiver 100. Therefore, the interference of wind blowing or other noise in the environment can be avoided, and the pure sound quality of the human voice picked up by each omnidirectional microphone box in the meeting place is ensured.
Each omni-directional speaker is provided with a mixer, and from among the 4 omni-directional speakers, the main omni-directional speaker collects the sound of the other three auxiliary omni-directional speakers, synthesizes the sound into an audio signal through the mixer, and transmits the audio signal to the wireless transceiver 100 in an uplink communication manner.
As a preferred solution, each omni-directional speaker is internally provided with a buffer module, during uplink communication, the main omni-directional speaker sequentially buffers the collected audio signals of the three auxiliary omni-directional speaker, and when all the audio signals are all uplink communication, the audio signals uploaded by each auxiliary omni-directional speaker are decoded at Tm time, and immediately after decoding, the communication is opened by the main omni-directional speaker, wireless connection is formed with the wireless transceiver 100, and the audio signals of the 4 omni-directional speaker groups are uploaded to the wireless transceiver 100 and are transmitted to the computer terminal 200.
As shown in fig. 3, the downlink communication adopts a broadcasting mode, so that the sound playing is completely synchronous, and the segmented buffering is not needed. In the uplink communication, it is assumed that the microphone No. 1 speaker is first connected to the wireless transceiver terminal 100, data exchange is first achieved, the microphone No. 20 speaker is next, and the microphone No. 30 speaker is next. Because the audio data uploaded by the microphone No. 1 loudspeaker box needs longer buffer time, the buffer time is T1+T2+T3; in the same way, the audio data buffer time uploaded by the No. 20 microphone loudspeaker box is T2+T3; and the buffer time of the No. 30 microphone is T3, so that the data can be decoded only by collecting the data in the buffer time and reaching the time Tm when all the data are collected, and the communication synchronism is ensured. The decoded data is transmitted to the wireless transceiver terminal 100 in an uplink manner, and finally transmitted to the client computer 200.
In addition, in other self-grouping full-microphone sound box groups, each main full-microphone sound box and each corresponding auxiliary omni-directional microphone sound box also adopt the same mode to buffer data so as to ensure the synchronism of voice playing, and the description is omitted here.
As shown in fig. 3, the buffer module includes a buffer MCU, which is an algorithm for calculating the current network delay and jitter buffer delay. The decision of the signal processing command is critical because the signal processing command can improve the sound quality and conversely can reduce the sound quality according to the network delay, the jitter buffer delay and other factors. And the second is various signal processing algorithms, mainly including acceleration, deceleration, packet loss compensation, fusion, background noise generation processing and the like.
The processing procedure of the buffer module is mainly divided into two parts, namely a process of inserting RTP voice packets into a data packet buffer area and a process of extracting voice packet decoding and PCM signal processing from the data packet buffer area.
The process of inserting RTP voice packets into the data packet buffer, extracting voice packet decoding and PCM signal processing from the data packet buffer mainly comprises 9 steps:
and 1, initializing a buffer memory module after receiving the first Rtp voice packet.
And 2, analyzing the RTP voice packet and inserting the RTP voice packet into a data packet buffer area. The insertion is performed sequentially according to the sequence of the received packets, and the insertion is continued from the head after reaching the tail.
And 3, calculating a network delay value by the cache MCU.
And 4, giving an ending time stamp of the DSP module to a time stamp playout TS, and transmitting the ending time stamp of the DSP module and the number of unplayed samples in the voice buffer area to the cache MCU together to tell the cache MCU the playing condition of the current DSP module.
And 5, checking whether the voice packet is to be fetched from the data packet buffer and whether the voice packet can be fetched. When the packet is taken out, a method for traversing the whole data packet buffer area is used, and the smallest time stamp which is more than or equal to the time stamp playdoutts is found according to the time stamp playdoutts and is marked as a variable, and the variable is taken out. If the packet is lost, the packet is not taken.
And 6, calculating a jitter buffer delay value.
And 7, determining the current cache MCU control command according to the network delay jitter buffer delay, the processing mode of the previous frame and the like.
8, decoding if the packet is extracted from the data packet buffer, otherwise not decoding.
And 9, performing signal processing on the decoded data and the data in the voice buffer area according to the control command given by the buffer MCU.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical principles of the present invention are still within the scope of the technical solutions of the present invention.
Claims (10)
1. The microphone acoustic system based on the wireless honeycomb networking technology is characterized by comprising a wireless transceiver (100), wherein the wireless transceiver is connected with a computer terminal (200); the wireless transceiver transmits audio signals to the computer terminal and receives audio signals from the computer terminal; the wireless transceiver (100) is internally provided with a first wireless transceiver chip;
a plurality of omnidirectional microphone boxes, wherein each omnidirectional microphone box is internally provided with a second wireless transceiver chip, and is in wireless communication with the first wireless transceiver chip through the second wireless transceiver chip;
the plurality of omnidirectional microphone boxes at least comprise a No. 1, a No. 2, a No. 3 and a No. 4 omnidirectional microphone boxes, wherein the No. 2, the No. 3 and the No. 4 omnidirectional microphone boxes surround the No. 1 and are three speakers closest to the No. 1 omnidirectional microphone boxes, and the No. 2, the No. 3 and the No. 4 omnidirectional microphone boxes are communicated with the No. 1 to form the No. 1 omnidirectional microphone boxes to receive audio signals of the No. 2, the No. 3 and the No. 4 omnidirectional microphone boxes;
the plurality of omnidirectional microphone boxes further comprise a No. 5 omnidirectional microphone box and a No. 6 omnidirectional microphone box, wherein the No. 1 omnidirectional microphone box, the No. 5 omnidirectional microphone box and the No. 6 omnidirectional microphone box surround the No. 2, are three speakers closest to the No. 2 omnidirectional microphone box, and are communicated with the No. 2 simultaneously to form the audio signals of the No. 2 omnidirectional microphone boxes to receive the No. 1, the No. 5 omnidirectional microphone boxes and the No. 6 omnidirectional microphone boxes;
the plurality of omnidirectional microphone boxes further comprise a No. 7 omnidirectional microphone box and a No. 8 omnidirectional microphone box, wherein the No. 1 omnidirectional microphone box, the No. 7 omnidirectional microphone box and the No. 8 omnidirectional microphone box surround the periphery of the No. 3 microphone box and are three speakers closest to the No. 3 omnidirectional microphone box, and the No. 1 omnidirectional microphone box, the No. 7 omnidirectional microphone box and the No. 8 omnidirectional microphone box simultaneously communicate with the No. 3 microphone box to form audio signals of the No. 3 omnidirectional microphone boxes to receive the No. 1 omnidirectional microphone box, the No. 7 omnidirectional microphone box and the No. 8 omnidirectional microphone box;
the plurality of omnidirectional microphone boxes further comprise a No. 9 omnidirectional microphone box and a No. 10 omnidirectional microphone box, wherein the No. 1 omnidirectional microphone box, the No. 9 omnidirectional microphone box and the No. 10 omnidirectional microphone box surround the periphery of the No. 4 microphone box and are three speakers closest to the No. 4 omnidirectional microphone box, and the No. 1 omnidirectional microphone box, the No. 9 omnidirectional microphone box and the No. 10 omnidirectional microphone box are communicated with the No. 4 microphone box to form the audio signals of the No. 4 omnidirectional microphone boxes to receive the No. 1 omnidirectional microphone box, the No. 9 omnidirectional microphone box and the No. 10 omnidirectional microphone box;
the plurality of omnidirectional microphone boxes are provided with numbers, the omnidirectional microphone box with a certain number is in wireless communication with any three omnidirectional microphone boxes with other numbers at the nearest distance, and a wireless honeycomb integrated microphone acoustic system is formed.
2. The microphone acoustic system based on wireless cellular alliance technology according to claim 1, characterized in that: every four omnidirectional microphone boxes form a group, one numbered omnidirectional microphone is communicated with the other three numbered omnidirectional microphone boxes simultaneously to realize a one-to-three microphone conference system, and a plurality of one-to-three microphone conference systems form a wireless honeycomb set-connected microphone acoustic system.
3. The microphone acoustic system based on wireless cellular alliance technology according to claim 1, characterized in that: during downlink communication, the wireless transceiver (100) and all the omnidirectional microphone boxes are in the network IP address of the same channel, the wireless transceiver (100) receives audio signals from the computer terminal (200), a pair of all broadcasting communication modes is realized between the wireless transceiver (100) and all microphone horns, the wireless transceiver (100) in the network performs unconditional copying on signals sent by the computer terminal (200) and forwards the signals to all the omnidirectional microphone boxes, and all the omnidirectional microphone boxes can receive all the information and perform sound synchronous playing.
4. The microphone acoustic system based on wireless cellular alliance technology according to claim 1, characterized in that: when the No. 2, the No. 3 and the No. 4 omnidirectional microphone boxes upload respective audio signals to the No. 1 omnidirectional microphone boxes during uplink communication, an ad hoc network communication protocol is adopted, and an adaptive frequency hopping technology is combined, so that the audio signals are uploaded to the No. 1 omnidirectional microphone boxes in a time-division multi-frequency manner;
similarly, the uplink communication modes among the 4 omni-directional speaker boxes formed by other arbitrary combinations are the same as those of the No. 1, no. 2, no. 3 and No. 4 omni-directional speaker boxes.
5. The microphone acoustic system based on wireless cellular networking technology of claim 4, wherein: during uplink communication, among the 4 closest omni-directional microphone boxes formed by random combination, the omni-directional microphone box with the largest picked sound is called a main omni-directional microphone box, and the other three closest omni-directional microphone boxes positioned around the main omni-directional microphone box are called auxiliary omni-directional microphone boxes; the main omnidirectional microphone is in wireless communication with a first wireless transceiver chip of the wireless transceiver (100) through a second wireless transceiver chip arranged in the main omnidirectional microphone, and the three auxiliary omnidirectional microphone is in wireless communication with a second wireless transceiver chip of the main omnidirectional microphone through the second wireless transceiver chip arranged in the auxiliary omnidirectional microphone.
6. The microphone acoustic system based on wireless cellular networking technology of claim 5, wherein: the wireless transceiver (100) sequentially connects three main omnidirectional microphone boxes according to the sound loudness order of the main omnidirectional microphone boxes through an ad hoc network routing protocol.
7. The microphone acoustic system based on wireless cellular networking technology of claim 5, wherein: each omnidirectional microphone is internally provided with a buffer module, when in uplink communication, the main omnidirectional microphone sequentially buffers the collected audio signals of the three auxiliary omnidirectional microphone, after all the audio signals are all in uplink communication, at the Tm time, the audio signals uploaded by each auxiliary omnidirectional microphone are decoded, after the decoding is completed, the communication is opened by the main omnidirectional microphone immediately, wireless connection is formed with a wireless transceiver (100), and the audio signals of the 4 omnidirectional microphone from a group are uploaded to the wireless transceiver (100) and are transmitted to a computer terminal (200).
8. The microphone acoustic system based on wireless cellular networking technology of claim 5, wherein: each omnidirectional microphone is provided with a voice signal processor, the voice signal processor sets a sound loudness threshold value X, when the sound loudness collected by a certain group of omnidirectional microphone is larger than the threshold value X, the main omnidirectional microphone of the group of 4 omnidirectional microphone is automatically opened in a communication mode and is interconnected with a wireless transceiver (100), and when the sound loudness collected by other groups of omnidirectional microphone does not exceed the threshold value X, the sound loudness collected by other groups of omnidirectional microphone is dormant and cannot be interconnected with the wireless transceiver (100).
9. The microphone acoustic system based on wireless cellular networking technology of claim 5, wherein: each omnidirectional microphone is provided with a mixer, and after the main omnidirectional microphone collects the sound of the other three auxiliary omnidirectional microphone from the group of 4 omnidirectional microphone, the sound is synthesized into an audio signal by the mixer, and then uplink communication is sent to a wireless transceiver (100).
10. The microphone acoustic system based on wireless cellular alliance technology according to claim 1, characterized in that: the modules of each omnidirectional microphone comprise a wireless transmitting module, a broadcast receiving module, a coder-decoder, a voice signal processor, a sound mixer, a separator and a buffer module;
recording thread: and the voice signal processor is responsible for collecting the audio of the microphone, buffering the audio to a certain length after collecting the audio, and sending the audio to the voice signal processor for audio processing, wherein the audio mainly comprises EC, AGC, NS and the like. Then sending the packets to a wireless transmission channel, encoding the packets by an audio encoder and a decoder, packaging the packets into Rtp packets, and sending the Rtp packets through a second wireless transmission module;
receiving a thread: the broadcast receiving module is responsible for receiving the audio packets sent by the far end, the decoder unpacks the Rtp packets, decodes the audio data and sends the audio data to the buffer module for buffering.
Playing the thread: the method comprises the steps that in charge of earphone sound playing, a playing thread goes to a mixer to obtain audio data to be played, firstly, audio frames stored by a buffer module in a wireless transmission channel participating in a session are sequentially obtained, and a decoder can perform AGC and NS processing on the audio frames; then the audio signals of a plurality of wireless transmission channels are mixed by the audio mixer to obtain mixed audio, the mixed audio is transmitted to the voice signal processor for remote analysis, and finally the mixed audio is played by the loudspeaker of the sound box.
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| US20170257160A1 (en) * | 2016-03-03 | 2017-09-07 | Airbus Operations Sas | Communication system and method for the transmission of audio data signals from an aircraft cockpit to a ground station |
| CN210297835U (en) * | 2019-11-22 | 2020-04-10 | 深圳随锐云网科技有限公司 | Conference telephone and conference system for realizing high-quality cascade connection |
| CN116249045A (en) * | 2023-05-11 | 2023-06-09 | 深圳奥尼电子股份有限公司 | Set-connected microphone acoustic technical equipment adopting wireless star-link mode |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20170257160A1 (en) * | 2016-03-03 | 2017-09-07 | Airbus Operations Sas | Communication system and method for the transmission of audio data signals from an aircraft cockpit to a ground station |
| CN210297835U (en) * | 2019-11-22 | 2020-04-10 | 深圳随锐云网科技有限公司 | Conference telephone and conference system for realizing high-quality cascade connection |
| CN116249045A (en) * | 2023-05-11 | 2023-06-09 | 深圳奥尼电子股份有限公司 | Set-connected microphone acoustic technical equipment adopting wireless star-link mode |
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