CN110326309B - Pickup equipment and system - Google Patents
Pickup equipment and system Download PDFInfo
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- CN110326309B CN110326309B CN201780024231.8A CN201780024231A CN110326309B CN 110326309 B CN110326309 B CN 110326309B CN 201780024231 A CN201780024231 A CN 201780024231A CN 110326309 B CN110326309 B CN 110326309B
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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
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/12—Gramophone pick-ups using a stylus; Recorders using a stylus
- H04R9/16—Gramophone pick-ups using a stylus; Recorders using a stylus signals recorded or played back by vibration of a stylus in two orthogonal directions simultaneously
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Abstract
The pickup equipment comprises a wireless receiving demodulation module, a preset number of microphones, an array audio preprocessing module, an audio processing module and a control module. The wireless receiving and demodulating module receives first audio data transmitted by external wireless sound pickup equipment and transmits the first audio data to the audio processing module; the microphone collects sound information in the current environment and outputs the sound information to the array audio preprocessing module, and the array audio preprocessing module processes the sound information into second audio data and outputs the second audio data to the audio processing module; the control module controls the audio processing module to mix and synthesize the first audio data and the second audio data according to the mixing output proportion. The pickup system comprises pickup equipment and wireless pickup equipment which is in communication connection with the pickup equipment. This scheme has realized gathering the sound in the current environment and the user's of wireless adapter equipment sound simultaneously, and the pickup is effectual, and system structure is simple, simple to operate, and the wiring is few, and is with low costs.
Description
Technical Field
This scheme belongs to sound collection technical field, especially relates to a pickup equipment and system.
Background
At present, most of pickup systems for teaching recording and broadcasting are realized by hoisting one or more microphones on a ceiling in a classroom, each microphone needs to be independently installed, and audio is processed and then input into recording and broadcasting equipment. The microphone is far away from teachers and students, sound signals picked up by the microphone are weak, environmental noise is picked up at the same time, audio needs to be input into recording and broadcasting equipment after being subjected to noise reduction, gain improvement and the like, however, in the processing process, most of the sound given by teachers is affected, and the sound quality is reduced. The sound pickup system is complex in installation, more in wiring, higher in requirement on indoor acoustic design and decoration, and high in construction cost. If the sound pickup system is applied to normal teaching recorded broadcasting in all classrooms, the sound pickup effect is further reduced because the common classrooms usually have no special acoustic decoration.
In summary, the prior art has the problems of poor pickup effect, complex system structure and high cost.
Disclosure of Invention
In view of this, this scheme embodiment provides a sound pickup apparatus and system to there exist the pickup effect poor, the system architecture is complicated and with high costs problem among the prior art in order to solve.
A first aspect of the present embodiment provides a sound pickup apparatus, including a wireless receiving demodulation module, a preset number of microphones, an array audio preprocessing module, an audio processing module, and a control module.
The microphone is connected with the array audio preprocessing module, and the audio processing module is respectively connected with the array audio preprocessing module, the wireless receiving and demodulating module and the control module.
The wireless receiving and demodulating module receives first audio data transmitted by external wireless sound pickup equipment and transmits the first audio data to the audio processing module; the microphone collects sound information in the current environment and outputs the sound information to the array audio preprocessing module, and the array audio preprocessing module processes the sound information into second audio data and outputs the second audio data to the audio processing module; the control module outputs a sound mixing control adjusting signal to the audio processing module, the audio processing module determines a sound mixing output proportion according to the sound mixing control adjusting signal, and outputs data obtained by mixing and synthesizing the first audio data and the second audio data to the recording equipment according to the sound mixing output proportion.
In one embodiment, the sound pickup apparatus further includes an audio power amplifier module.
The audio power amplifier module is respectively connected with the wireless receiving demodulation module and the control module.
The audio power amplifier module receives the first audio data, the control module outputs a power amplifier gain adjusting signal to the audio power amplifier module, the audio power amplifier module determines a gain adjusting proportion according to the power amplifier gain adjusting signal, and the first audio data are amplified and output to the sound amplifying device according to the gain adjusting proportion.
In one embodiment, the control module includes a mixing control adjusting unit, a power amplifier gain adjusting unit and a communication interface unit.
The output end of the sound mixing control and adjustment unit is used as a first output end of the control module and is connected with the audio processing module; the output end of the power amplifier gain adjusting unit is used as a second output end of the control module and is connected with the audio power amplifier module; the input end of the communication interface unit is used as the input end of the control module and is connected with external control equipment, the first output end of the communication interface unit is connected with the input end of the sound mixing control and adjustment unit, and the second output end of the communication interface unit is connected with the input end of the power amplifier gain adjustment unit.
The external control equipment sends a control signal to the communication interface unit, the communication interface unit respectively controls the audio mixing control and adjustment unit to output an audio mixing control and adjustment signal according to the control signal, and the power amplifier gain adjustment unit outputs a power amplifier gain adjustment signal.
In one embodiment, the array audio preprocessing module comprises an array audio forming unit, wherein the array audio forming unit determines the direction of a sound source according to the volume of sound information, switches on the connection with a microphone in the direction of the sound source, and switches off the connection with other microphones; alternatively, the array audio forming unit combines a preset number of microphones into a microphone array with directivity according to the sound source direction.
In one embodiment, the array audio preprocessing module further includes a preset number of analog-to-digital conversion units and noise reduction units.
The input end of the analog-to-digital conversion unit is the input end of the array audio preprocessing module, the output end of the analog-to-digital conversion unit is connected with the input end of the array audio forming unit, the output end of the array audio forming unit is connected with the input end of the noise reduction unit, and the output end of the noise reduction unit is the output end of the array audio preprocessing module.
In one embodiment, the audio processing module includes a mixing unit, a first input end of the mixing unit is connected to the output end of the wireless receiving and demodulating module, and a control input end of the mixing unit is connected to the first output end of the control module.
The sound mixing unit determines a volume threshold and an attenuation amount according to the sound mixing control adjustment signal; when the volume of the first audio data is larger than or equal to the volume threshold, the sound mixing unit attenuates the volume of the second audio data according to the attenuation amount, and the first audio data and the attenuated second audio data are synthesized into an audio file according to the sound mixing output proportion.
In one embodiment, the audio processing module further comprises an echo cancellation unit and an equalization adjustment unit.
The first input end of the echo cancellation unit is connected with the output end of the wireless receiving demodulation module; the second input end of the echo cancellation unit is connected with the output end of the array audio preprocessing module; the output end of the echo cancellation unit is connected with the input end of the balance adjustment unit; the output end of the equalization adjusting unit is connected with the second input end of the sound mixing unit, and the output end of the sound mixing unit is the output end of the audio processing module.
The echo cancellation unit receives the first audio data and the second audio data respectively, performs echo cancellation on the second audio data by referring to the first audio data, and outputs the second audio data after the echo cancellation to the equalization adjustment unit.
In one embodiment, the wireless receiving and demodulating module comprises a radio frequency receiving unit or an infrared receiving unit.
In one embodiment, the sound pickup apparatus further includes a main housing.
Microphone, array audio frequency preprocessing module, audio frequency processing module, audio frequency power amplifier module and the control module of predetermineeing quantity all set up the inboard of main casing body, the inboard top of main casing body is provided with the holding portion that is used for holding wireless receiving demodulation module, and microphone of predetermineeing quantity is arranged along the periphery of holding portion at the inboard top of main casing body, and the top of main casing body is equipped with the annular net that is used for the sound transmission that corresponds with the microphone position along the periphery of holding portion.
A second aspect of the present embodiment provides a sound pickup system, including the sound pickup apparatus as described above, and further including a wireless sound pickup apparatus in communication connection with the sound pickup apparatus.
According to the embodiment of the scheme, the wireless receiving and demodulating module is used for receiving first audio data transmitted by external wireless sound pickup equipment and transmitting the first audio data to the audio processing module; the microphone collects sound information in the current environment and outputs the sound information to the array audio preprocessing module, and the array audio preprocessing module processes the sound information into second audio data and outputs the second audio data to the audio processing module; the control module outputs a sound mixing control adjusting signal to the audio processing module, the audio processing module determines a sound mixing output proportion according to the sound mixing control adjusting signal, and outputs data obtained by mixing and synthesizing the first audio data and the second audio data to the recording equipment according to the sound mixing output proportion; the first audio data are simultaneously output to the audio power amplification module for power amplification and then output to the sound amplification equipment. The sound pickup device has the advantages that the sound in the current environment and the sound of a user of the wireless pickup device are collected simultaneously, the pickup effect is good, the system structure is simple, the installation is convenient, the wiring is few, and the cost is low.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly introduced below, and 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 to obtain other drawings based on these drawings without any creative effort.
Fig. 1 is a schematic block diagram of a sound pickup apparatus according to embodiment 1;
fig. 2 is a schematic block diagram of a sound pickup apparatus according to embodiment 2;
fig. 3 is a mechanical structure diagram of a sound pickup apparatus;
fig. 4 is a bottom view of fig. 3.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the present solution embodiments. It will be apparent, however, to one skilled in the art that the present solution may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present solution with unnecessary detail.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It should also be understood that the terms "first," "second," and "third," etc. in the description and claims of the present solution and in the above-described drawings are used for distinguishing between different objects and not for describing a particular order.
It is also to be understood that the terminology used in the description of the present solution herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
As used in this specification and the appended claims, the term "if" may be interpreted contextually as "when", "upon" or "in response to a determination" or "in response to a detection". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".
In order to explain the technical solution of the present invention, the following description will be given by way of specific examples.
Example 1:
fig. 1 shows a structure of a sound pickup apparatus 100 according to an embodiment of the present invention, and for convenience of description, only the parts related to the embodiment of the present invention are shown, which are described in detail as follows:
as shown in fig. 1, a sound pickup apparatus 100 according to an embodiment of the present invention includes a wireless receiving and demodulating module 110, a predetermined number of microphones 120, an array audio preprocessing module 130, an audio processing module 140, and a control module 150.
The microphone 120 is connected to the array audio preprocessing module 130, and the audio processing module 140 is respectively connected to the array audio preprocessing module 130, the wireless receiving and demodulating module 110, and the control module 150.
The wireless receiving and demodulating module 110 receives first audio data transmitted by an external wireless sound pickup device, and transmits the first audio data to the audio processing module 140; the microphone 120 collects sound information in the current environment and outputs the sound information to the array audio preprocessing module 130, and the array audio preprocessing module 130 processes the sound information into second audio data and outputs the second audio data to the audio processing module 140; the control module 150 outputs the mixing control adjustment signal to the audio processing module 140, and the audio processing module 140 determines a mixing output ratio according to the mixing control adjustment signal, and outputs the data obtained by mixing and synthesizing the first audio data and the second audio data to the recording device according to the mixing output ratio.
In this embodiment, the sound information is an analog signal, and the first audio data and the second audio data are both digital signals.
In one embodiment, the microphone 120 includes a microphone, and/or a microphone.
In one embodiment, the predetermined number is 2 or more than 2.
For example, the preset number of microphones 120 may include 4 microphones 120 for picking up 4 directional (east, south, west, north) sounds, or 8 microphones 120 for picking up 8 directional (east, south, west, north) sounds.
In this embodiment, a plurality of microphones 120 are integrated in one sound pickup apparatus 100 to form a microphone array. The microphone array can collect sounds in multiple directions, and directionally switching one or more microphones 120 to work and other microphones 120 not to work can be realized through the control of the array audio preprocessing module 130, so that the sounds in one or more directions are collected. The array audio pre-processing module 130 may also use microphone array technology for sound pickup processing.
The present embodiment integrates a plurality of microphones 120, which facilitates centralized control, and also reduces wiring between the sound pickup apparatus 100 and other apparatuses, thereby reducing the complexity of apparatus installation.
In one embodiment, the input terminal of the wireless receiving demodulation module 110 is communicatively connected to a wireless sound pickup device, the output terminal of the microphone 120 is connected to the input terminal of the array audio preprocessing module 130, the input terminal of the audio processing module 140 is respectively connected to the output terminal of the array audio preprocessing module 130 and the output terminal of the wireless receiving demodulation module 110, the first output terminal of the control module 150 is connected to the control input terminal of the audio processing module 140, and the output terminal of the audio processing module 140 is communicatively connected to an external sound recording device.
In one embodiment, the sound pickup apparatus 100 is connected to an external sound amplifying apparatus and a sound recording apparatus through cables, respectively. The function of sound amplification playing and the function of sound recording are realized.
In one embodiment, a wireless sound pickup apparatus includes a portable microphone and a wireless signal transmission module.
The portable microphone is used for collecting first sound information, and the wireless signal sending module processes the first sound information received by the portable microphone into first audio data and sends the first audio data to the wireless receiving and demodulating module 110.
In one embodiment, a portable microphone for use with a wireless pickup device includes a portable microphone, a microphone, and/or a microphone.
In this embodiment, portable microphone can follow the user and remove, can gather user's sound alone, has improved the definition of pickup. When the user is a speaker, the speech content of the speaker can be collected by the portable microphone, and the sound pickup apparatus 100 collects sounds in an indoor environment, such as a conversation in which a speaker interacts with the speaker, so that the voice of the speaker can be distinguished from sounds in the indoor environment, thereby emphasizing a main sound, attenuating a sub-sound, and obtaining high-quality audio data.
In a specific application, wireless communication is adopted between the wireless signal sending module and the wireless receiving and demodulating module 110, so that wiring can be reduced, and the portable microphone can be moved conveniently. The wireless signal sending module is used for sending the first audio data, and the wireless receiving and demodulating module 110 is used for receiving and demodulating the first audio data.
In this embodiment, the wireless receiving and demodulating module 110 performs wireless communication with an external wireless sound pickup apparatus, receives first audio data transmitted by the external wireless sound pickup apparatus, and transmits the first audio data to the audio processing module 140.
In this embodiment, the wireless receiving and demodulating module 110 communicates with an external wireless sound pickup apparatus, so that the sound of a user using the wireless sound pickup apparatus can be separately collected and processed, thereby reducing the interference of sound in the surrounding environment and obtaining a better sound pickup effect.
In this embodiment, the microphones 120 collect sound information in the current environment and output the sound information to the array audio preprocessing module 130, and the array audio preprocessing module 130 processes multiple paths of sound information into multiple paths of second audio data and outputs the second audio data to the audio processing module 140.
In this embodiment, an external control device sends a control signal to the control module 150, the control module 150 outputs a mixing control adjustment signal to the audio processing module 140 according to the control signal, the audio processing module 140 determines a mixing output ratio according to the mixing control adjustment signal, and outputs data obtained by mixing and synthesizing the first audio data and the second audio data to a recording device according to the mixing output ratio; there are the following special outputs: 1) when the output proportion of the mixed sound is infinite, only outputting the first path of audio data; 2) when the output proportion of the mixed sound is infinitely small, only the second path of audio data is output.
As shown in fig. 1, in an embodiment of the present disclosure, the sound pickup apparatus 100 further includes an audio power amplifier module 160.
The audio power amplifier module 160 is respectively connected to the wireless receiving and demodulating module 110 and the control module 150.
The audio power amplifier module 160 receives the first audio data, the control module 150 outputs a power amplifier gain adjustment signal to the audio power amplifier module 160, and the audio power amplifier module 160 determines a gain adjustment ratio according to the power amplifier gain adjustment signal and amplifies and outputs the first audio data to the sound amplifier according to the gain adjustment ratio.
For the convenience of understanding, the embodiment of the present invention is described by taking a specific application scenario as an example, and is described in detail as follows.
In the recording and broadcasting application of teaching, the pickup device 100 is hung on the ceiling in a classroom and used for collecting the sound in the classroom. The wireless pickup equipment is worn on the body of the teacher and is specially used for collecting the teaching sound of the teacher. The wireless sound pickup apparatus picks up the sound information of the teacher and processes the sound information into first audio data, and then sends the first audio data to the wireless reception demodulation module 110 in the sound pickup apparatus 100. The microphone 120 in the sound pickup apparatus 100 picks up sound information of students and classes, and converts the sound information into second audio data after being processed by the array audio preprocessing module 130. The sound pickup apparatus 100 mixes the first audio data and the second audio data and outputs them collectively.
The function of sound pickup in teaching recording and playing can be completed by installing a set of sound pickup equipment 100 in a classroom. The sound pickup apparatus 100 picks up student and classroom sounds. The wireless sound pickup equipment is worn on a teacher body, for example, a wireless microphone is specially used for receiving the sound given by the teacher, the wireless sound pickup equipment is convenient to carry, the teacher can walk freely and can keep the sound pickup distance stable, and the sound picked up by the teacher can be guaranteed to be clear all the time. Meanwhile, the sound pickup device 100 can also send sound data of a teacher to the sound amplification device, so that sound amplification for teaching is realized. The teaching interaction in classroom can fully be restored to this embodiment, and equipment structure is simple, and the installation is convenient, practices thrift the cost.
Example 2:
fig. 2 shows a block structure of the sound pickup apparatus 100 according to another embodiment of the present invention, and for convenience of explanation, only the parts related to the embodiment of the present invention are shown, which are described in detail as follows:
as shown in fig. 2, in an embodiment of the present disclosure, the control module 150 in fig. 1 includes a mixing control adjusting unit 151, a power amplifier gain adjusting unit 152, and a communication interface unit 153.
An output end of the mixing control adjusting unit 151 is connected to the audio processing module 140 as a first output end of the control module 150; the output end of the power amplifier gain adjusting unit 152 is used as the second output end of the control module 150, and is connected with the audio power amplifier module 160; an input end of the communication interface unit 153 is used as an input end of the control module 150 and is connected to an external control device, a first output end of the communication interface unit 153 is connected to an input end of the mixing control adjusting unit 151, and a second output end of the communication interface unit 153 is connected to an input end of the power amplifier gain adjusting unit 152.
The external control device sends a control signal to the communication interface unit 153, and the communication interface unit 153 controls the mixing control adjusting unit 151 to output a mixing control adjusting signal and the power amplifier gain adjusting unit 152 to output a power amplifier gain adjusting signal according to the control signal.
In one embodiment, the communication interface unit 153 includes a network interface, a USB interface, a serial interface, and/or a parallel interface.
In this embodiment, the control device may be a user terminal, such as a computer, an industrial personal computer, a mobile phone, and the like, and the control device controls the sound pickup device 100 through the control module 150, so as to control sound mixing control and adjustment and control power amplifier gain adjustment. The control device controls whether the second path of audio starts attenuation or not and the attenuation amount after the attenuation is started through sound mixing control and adjustment, and adjusts the sound mixing proportion of the first audio data and the second audio data, so that the data output to the recording device is adjusted. The control equipment adjusts the volume output to the sound amplifying equipment by controlling the gain of the power amplifier.
As shown in fig. 2, in one embodiment of the present invention, the array audio preprocessing module 130 in fig. 1 includes an array audio forming unit 132, where the array audio forming unit 132 determines a sound source direction according to the volume of sound information, turns on the microphone 120 in the sound source direction, and turns off the microphone 120; alternatively, the array audio forming unit 132 combines a preset number of microphones 120 into a microphone array with directivity according to the sound source direction.
In the embodiment, the microphone array technology is adopted, so that the sound waves can be filtered by utilizing the difference between the phases of the sound waves received by the plurality of microphones, the environmental background sound can be filtered to the maximum extent, and only the needed sound waves are left. For devices that employ this configuration in noisy environments, the listener can be made to sound more clearly.
In one embodiment, referring to fig. 2, the array audio forming unit 132 includes a multiplexer switch.
In the present embodiment, the array audio forming unit 132 determines the sound source direction according to the volume of the sound information. The sound information with large volume is the information to be collected, that is, the microphones 120 in the source direction are required to be turned on, and the array audio forming unit 132 turns on these microphones 120, thereby receiving the sound information collected by them. The sound information with a small volume is information that does not need to be collected, that is, the other microphones 120 need to be disconnected, and the array audio forming unit 132 is disconnected. The present embodiment realizes the directional switching of the microphone 120, and can automatically switch to the microphone 120 located in the corresponding direction according to the sound direction with the largest volume in the current environment, for example, in a teaching recording and playing application, the sound pickup apparatus 100 can realize the directional switching of the microphone 120 according to the speaking direction of a student, so as to obtain clearer sound, and further improve the sound pickup effect.
As shown in fig. 2, in an embodiment of the present disclosure, the array audio preprocessing module 130 in fig. 1 further includes a preset number of analog-to-digital conversion units 131 and noise reduction units 133.
The input end of the analog-to-digital conversion unit 131 is the input end of the array audio preprocessing module 130, the output end of the analog-to-digital conversion unit 131 is connected with the input end of the array audio forming unit 132, the output end of the array audio forming unit 132 is connected with the input end of the noise reduction unit 133, and the output end of the noise reduction unit 133 is the output end of the array audio preprocessing module 130.
In a specific application, an input terminal of the analog-to-digital conversion unit 131 is connected to an output terminal of the microphone 120. The multiple analog-to-digital conversion units 131 are connected to the multiple microphones 120 in a one-to-one correspondence, and one analog-to-digital conversion unit 131 is connected to one microphone. The analog-to-digital conversion unit 131 converts analog-amount sound information collected by the microphone 120 into digital-amount second audio data through analog-to-digital conversion.
In a specific application, the array audio forming unit 132 can be connected to or disconnected from one or more analog-to-digital converting units 131, and further connected to or disconnected from one or more microphones 120.
In a specific application, the output end of the noise reduction unit 133 is connected to the audio processing module 140. The noise reduction unit 133 performs noise reduction processing on the second audio data and outputs the second audio data to the audio processing module 140.
In this embodiment, through analog-to-digital conversion, noise reduction, and echo suppression, processing of the second audio data is realized, the influence of noise is reduced, and the sound pickup effect is further improved.
Taking a specific application scenario as an example, in the teaching recording and broadcasting application, the sound pickup apparatus 100 collects sounds of students and classroom, and since the distance between the students and the sound pickup apparatus 100 is long, the sound received by the microphone 120 includes not only direct sound of speaking of the students but also reflected sound in the classroom, and the sound quality is poor, it is necessary to perform processing such as noise reduction, echo cancellation, gain enhancement, and the like, and then output the sound.
As shown in fig. 2, in an embodiment of the present disclosure, the audio processing module 140 in fig. 1 includes a mixing unit 143, a first input terminal of the mixing unit 143 is connected to the output terminal of the wireless receiving and demodulating module 110, and a control input terminal of the mixing unit 143 is connected to a first output terminal of the control module 150.
The mixing unit 143 determines a volume threshold and an attenuation amount according to the mixing control adjustment signal; when the volume of the first audio data is greater than or equal to the volume threshold, the mixing unit 143 attenuates the volume of the second audio data by the attenuation amount, and synthesizes the first audio data and the attenuated second audio data into an audio file in a mixing output ratio.
In the present embodiment, the mixing control adjusting unit 151 in the control module 150 outputs a mixing control adjusting signal to the mixing unit 143 in the audio processing module 140.
In one embodiment, when the volume of the first audio data is greater than or equal to a preset threshold, the mixing unit 143 attenuates the volume of the second audio data such that the volume of the second audio data is attenuated by a preset number of decibels or until the volume is zero.
In one embodiment, when the volume of the first audio data is greater than or equal to a preset threshold, the mixing unit 143 attenuates the volume of the second audio data, and combines the first audio data and the attenuated second audio data into an audio file in a mixing output ratio in chronological order of audio data acquisition.
In a specific application, the sound pickup apparatus 100 may independently output the first audio data (the mixed sound output ratio is infinite) or the second audio data (the mixed sound output ratio is infinitesimal) according to different mixed sound output ratios, or may output the mixed sound by synthesizing the first audio data and the second audio data into an audio file and then outputting the audio file.
In this embodiment, when the first audio data collected by the wireless sound pickup apparatus reaches or exceeds the set threshold, the volume of the second audio data collected by the sound pickup apparatus 100 is attenuated, so that the first audio data can be clearly distinguished, thereby highlighting the main sound and reducing the interference caused by the sound in the environment.
Taking a specific application scenario as an example, in the teaching recording and broadcasting application, the sound pickup device 100 collects the sound in the classroom, the wireless sound pickup device collects the sound of teaching by the teacher, and when the teacher speaks and gives a lesson, the collected sound in the classroom is properly attenuated, so that the sound of teaching by the teacher in the output audio is clear and easy to distinguish, and real classroom interaction can be well restored. In addition, this embodiment may also be implemented to reduce, when the wireless sound pickup apparatus outputs clear sound for a teacher to give lessons, the sound for the teacher to give lessons included in the environmental sound acquired by the sound pickup apparatus 100, and avoid that the sound pickup effect is affected by the phase difference, signal delay, and other factors existing in the two paths of audio signals, so as to ensure that the clear sound for the teacher to give lessons is finally restored.
As shown in fig. 2, in one embodiment of the present disclosure, the audio processing module 140 in fig. 1 further includes an echo cancellation unit 141 and an equalization adjustment unit 142.
A first input end of the echo cancellation unit 141 is connected to an output end of the wireless receiving demodulation module 110; a second input end of the echo cancellation unit 141 is connected to the output end of the array audio preprocessing module 130; the output end of the echo cancellation unit 141 is connected with the input end of the equalization adjustment unit 142; an output end of the equalization adjusting unit 142 is connected to a second input end of the mixing unit 143, and an output end of the mixing unit 143 is an output end of the audio processing module 140.
The echo cancellation unit 141 receives the first audio data and the second audio data, respectively, performs echo cancellation on the second audio data with reference to the first audio data, and outputs the echo-cancelled second audio data to the equalization adjustment unit 142.
In this embodiment, the echo cancellation unit 141 can cancel interference of echo, and the equalization adjustment unit 142 can make the audio data achieve better sound quality.
In one embodiment of the present disclosure, the wireless receiving and demodulating module 110 includes a radio frequency receiving unit or an infrared receiving unit.
In this embodiment, the wireless receiving and demodulating module 110 is used for communicating with a wireless sound pickup apparatus, so as to receive the first audio data. The wireless receiving and demodulating module 110 demodulates data according to a preset communication protocol, and is also capable of amplifying sound and filtering noise.
In an embodiment of the present solution, the audio processing 140 further comprises a storage unit for storing the first audio information and the second audio information.
Example 3:
fig. 3 and 4 show a mechanical structure of the sound pickup apparatus 100 according to an embodiment of the present invention, and for convenience of description, only the parts related to the embodiment of the present invention are shown, which are described in detail as follows:
as shown in fig. 3 and 4, in one embodiment of the present solution, the sound pickup apparatus 100 as above further includes a main housing 1.
The microphone 120, the array audio preprocessing module 130, the audio processing module 140, the audio power amplifier module 160 and the control module 150 in preset numbers are all disposed on the inner side of the main housing 1, an accommodating portion for accommodating the wireless receiving and demodulating module 110 is disposed on the top of the inner side of the main housing 1, the microphone 120 in preset numbers is arranged on the top of the inner side of the main housing 1 along the periphery of the accommodating portion, and the ring network 2 for transmitting sound corresponding to the position of the microphone 120 is disposed on the top of the main housing 1 along the periphery of the accommodating portion.
Note that, in the orientation shown in fig. 3, the bottom of the main housing 1 is above and the top of the main housing 1 is below.
In one embodiment, as shown in fig. 4, the top of the main housing 1 comprises a curved annular cover 3, an annular net 2 and a convex shell 4, the outer side of the curved annular cover 3 is connected with the top end of the side wall of the main housing 1, the inner side of the curved annular cover 3 is connected with the outer side of the annular net 2, and the inner side of the annular net 2 is connected with the bottom end of the convex shell 4.
In one embodiment, the endless mesh 2 is a mesh structure, such as a metal mesh or the like.
In this embodiment, the convex shell 4 is a hemisphere, and the hollow structure thereof forms a receiving portion. The endless wire 2 is a metal wire mesh of a planar structure. The curved annular shroud 3 projects outwardly.
In this embodiment, a predetermined number of microphones 120 are disposed on the top of the inner side of the main housing 1 and arranged along the periphery of the convex housing 4, in fig. 4, the position of the microphone 120 is the position covered by the ring-shaped net 2, and the sound receiving part (e.g., microphone) of the microphone 120 faces the ring-shaped net 2.
The sound receiving portion of the microphone 120 is disposed downward to receive sound through the ring network 2, so that sound coming from the bottom direction is collected when the sound pickup apparatus 100 is hung from the ceiling in a room.
In one embodiment, the side walls of the main housing 1 are in the shape of a cylinder, a rectangular column, or a polygonal column.
In one embodiment, the side walls of the main housing 1 comprise an openwork 5. The hollow structure 5 includes a through hole array composed of a plurality of through holes, and can be a metal mesh for heat dissipation.
As shown in fig. 3, in one embodiment of the present invention, an interface board 6 for mounting a communication interface unit 153 is provided on a side wall of the main housing 1.
In one embodiment, the bottom shell is further provided with an assembling hole for hoisting.
Example 4:
the embodiment of the present scheme also provides a sound pickup system, which includes the sound pickup apparatus 100 as described above, and further includes a wireless sound pickup apparatus in communication connection with the sound pickup apparatus.
As mentioned above, the above embodiments are only used to illustrate the technical solution of the present solution, but not to limit the same; although the present solution has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. A pickup device is characterized by comprising a wireless receiving demodulation module, a preset number of microphones, an array audio preprocessing module, an audio processing module and a control module;
the microphone is connected with the array audio preprocessing module, and the audio processing module is respectively connected with the array audio preprocessing module, the wireless receiving and demodulating module and the control module;
the wireless receiving and demodulating module receives first audio data transmitted by external wireless sound pickup equipment and transmits the first audio data to the audio processing module; the microphone collects sound information in the current environment and outputs the sound information to the array audio preprocessing module, and the array audio preprocessing module processes the sound information into second audio data and outputs the second audio data to the audio processing module; the control module outputs a sound mixing control adjusting signal to the audio processing module, the audio processing module determines a sound mixing output proportion according to the sound mixing control adjusting signal, and outputs the data obtained by mixing and synthesizing the first audio data and the second audio data to a recording device according to the sound mixing output proportion;
the audio processing module comprises a sound mixing unit, a first input end of the sound mixing unit is connected with an output end of the wireless receiving demodulation module, and a control input end of the sound mixing unit is connected with a first output end of the control module;
the sound mixing unit determines a volume threshold and an attenuation amount according to the sound mixing control and adjustment signal; when the volume of the first audio data is larger than or equal to the volume threshold, the sound mixing unit attenuates the volume of the second audio data according to the attenuation amount, and synthesizes the first audio data and the attenuated second audio data into an audio file according to the mixed sound output proportion so as to highlight the first audio data and reduce the interference caused by the sound in the environment.
2. The pickup device of claim 1, further comprising an audio power amplifier module;
the audio power amplifier module is respectively connected with the wireless receiving demodulation module and the control module;
the audio power amplifier module receives the first audio data, the control module outputs a power amplifier gain adjusting signal to the audio power amplifier module, and the audio power amplifier module determines a gain adjusting proportion according to the power amplifier gain adjusting signal and amplifies and outputs the first audio data to the sound amplifying device according to the gain adjusting proportion.
3. The sound pickup apparatus of claim 2, wherein the control module includes a mixing control adjusting unit, a power amplifier gain adjusting unit, and a communication interface unit;
the output end of the sound mixing control and adjustment unit is used as a first output end of the control module and is connected with the audio processing module; the output end of the power amplifier gain adjusting unit is used as a second output end of the control module and is connected with the audio power amplifier module; the input end of the communication interface unit is used as the input end of the control module and is connected with external control equipment, the first output end of the communication interface unit is connected with the input end of the sound mixing control and adjustment unit, and the second output end of the communication interface unit is connected with the input end of the power amplifier gain adjustment unit;
the external control equipment sends a control signal to the communication interface unit, the communication interface unit respectively controls the sound mixing control and adjustment unit to output the sound mixing control and adjustment signal according to the control signal, and the power amplifier gain adjustment unit outputs the power amplifier gain adjustment signal.
4. The sound pickup apparatus as claimed in claim 1 or 2, wherein the array audio preprocessing module includes an array audio forming unit that determines a sound source direction according to a volume of the sound information, turns on a connection with the microphone in the sound source direction, and turns off a connection with the other microphones; or, the array audio forming unit combines the microphones of the preset number into a microphone array with directivity according to the sound source direction.
5. The pickup apparatus as claimed in claim 4, wherein the array audio preprocessing module further includes a preset number of analog-to-digital conversion units and noise reduction units;
the input end of the analog-to-digital conversion unit is the input end of the array audio preprocessing module, the output end of the analog-to-digital conversion unit is connected with the input end of the array audio forming unit, the output end of the array audio forming unit is connected with the input end of the noise reduction unit, and the output end of the noise reduction unit is the output end of the array audio preprocessing module.
6. The sound pickup apparatus of claim 1, wherein the audio processing module further comprises an echo cancellation unit and an equalization adjustment unit;
the first input end of the echo cancellation unit is connected with the output end of the wireless receiving demodulation module; the second input end of the echo cancellation unit is connected with the output end of the array audio preprocessing module; the output end of the echo cancellation unit is connected with the input end of the balance adjustment unit; the output end of the equalization adjusting unit is connected with the second input end of the sound mixing unit, and the output end of the sound mixing unit is the output end of the audio processing module;
the echo cancellation unit receives the first audio data and the second audio data respectively, performs echo cancellation on the second audio data by referring to the first audio data, and outputs the second audio data after echo cancellation to the equalization adjustment unit.
7. The pickup apparatus as claimed in claim 1 or 2, wherein the wireless reception demodulation module includes a radio frequency reception unit or an infrared reception unit.
8. The pickup apparatus as recited in claim 2 further comprising a main housing;
the microphone of predetermineeing quantity array audio frequency pre processing module the audio frequency processing module audio frequency power amplifier module with control module all sets up the inboard of main casing body, the inboard top of main casing body is provided with and is used for holding wireless receiving demodulation module's holding portion, the microphone of predetermineeing quantity is in the inboard top of main casing body is followed the periphery of holding portion is arranged, the top of main casing body is followed the periphery of holding portion is equipped with the annular network that is used for the sound transmission that the microphone position corresponds.
9. A pickup system comprising the pickup apparatus as recited in any one of claims 1 to 8, and further comprising the wireless pickup apparatus communicatively connected to the pickup apparatus.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2017/100246 WO2019041316A1 (en) | 2017-09-01 | 2017-09-01 | Sound pickup device and system |
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| CN110326309A CN110326309A (en) | 2019-10-11 |
| CN110326309B true CN110326309B (en) | 2021-04-09 |
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| CN201780024231.8A Active CN110326309B (en) | 2017-09-01 | 2017-09-01 | Pickup equipment and system |
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| CN (1) | CN110326309B (en) |
| WO (1) | WO2019041316A1 (en) |
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| CN110689890B (en) * | 2019-10-16 | 2023-06-06 | 声耕智能科技(西安)研究院有限公司 | Voice interaction service processing system |
| CN112929793B (en) * | 2021-01-25 | 2022-06-03 | 维沃移动通信有限公司 | Audio framework, audio control method, device and equipment |
| CN112911482B (en) * | 2021-03-15 | 2023-03-24 | 世邦通信股份有限公司 | System and method for automatically adjusting sound amplification area and area volume |
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| AU2015265541A1 (en) * | 2014-05-26 | 2017-01-12 | Vladimir Sherman | Methods circuits devices systems and associated computer executable code for acquiring acoustic signals |
| CN105976844A (en) * | 2016-04-29 | 2016-09-28 | 高翔 | Audio file generation method and device |
| CN106982286B (en) * | 2017-04-26 | 2020-06-09 | 温州青苗影视传媒有限公司 | Recording method, recording equipment and computer readable storage medium |
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| CN1845582A (en) * | 2005-04-06 | 2006-10-11 | 索尼株式会社 | Imaging device, sound record device, and sound record method |
| CN202068548U (en) * | 2011-01-17 | 2011-12-07 | 穆科明 | Three-dimensional space high-definition voice acquisition subsystem of video sensing system |
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| WO2019041316A1 (en) | 2019-03-07 |
| CN110326309A (en) | 2019-10-11 |
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