Audio Processing Method, Apparatus, Conference Microphone, and Computer-Readable Storage Medium

Abstract

This application belongs to the technical field of audio electronic devices, and relates to an audio processing method, apparatus, conference microphone, and computer-readable storage medium. Among them, the audio processing method is applicable to a conference microphone. The conference microphone is provided with a first pickup microphone and a second pickup microphone with opposite pickup directions. By picking up the speaker's voice in two directions, a first audio signal and a second audio signal are obtained, and the two are respectively converted into a first audio frame and a second audio frame in the frequency domain space. Taking the second audio frame as a reference, the frequency points that are different from the frequency points of the second audio frame are screened and removed from the first audio frame, greatly reducing the noise and interference generated when the airflow generated by the speaker's voice acts on the pickup device when the speaker is close to the conference microphone. The beneficial effect is that it solves the technical problem of poor pickup effect of existing conference microphones, makes the speaker's voice clearer, and improves the pickup effect of the conference microphone.

Description

Technical Field

[0001] This application relates to the technical field of audio electronic devices, and particularly to an audio processing method, apparatus, conference microphone, and computer-readable storage medium. Background Art

[0002] A microphone, also known as a microphone, is an electroacoustic device belonging to a microphone, which is a transducer for sound-electric conversion. It generates a voltage through the action of sound waves on the electroacoustic element and then converts it into electrical energy for use in various sound amplification devices. A conference microphone is a sound pickup device commonly used in occasions such as speeches, conferences, and reports. The existing conference microphones have not very satisfactory sound pickup effects and poor user experiences. Summary of the Invention

[0003] (1) Technical Problems to be Solved

[0004] In view of the above-mentioned disadvantages and deficiencies of the prior art, this application provides an audio processing method, apparatus, conference microphone, and computer-readable storage medium, which solve the technical problem of poor sound pickup effect of existing conference microphones.

[0005] (2) Technical Solutions

[0006] To achieve the above object, the main technical solutions adopted in this application include:

[0007] In a first aspect, an embodiment of this application provides an audio processing method applicable to a conference microphone, including the following steps:

[0008] Obtain a first audio signal of the first sound pickup microphone and a second audio signal of the second sound pickup microphone, where the sound pickup direction of the first sound pickup microphone is forward, and the sound pickup direction of the second sound pickup microphone is opposite to that of the first sound pickup microphone;

[0009] Convert the first audio signal and the second audio signal into a first audio frame and a second audio frame in the frequency domain space respectively, and both the first audio frame and the second audio frame include multiple frequency points;

[0010] Using the second audio frame as a reference, screen and remove the frequency points in the first audio frame that are different from the frequency points of the second audio frame to obtain a first preprocessed audio frame;

[0011] Perform an inverse conversion process on the first preprocessed audio frame to obtain a first target audio signal in the time domain as the first channel audio signal, and perform an inverse conversion process on the second audio frame to obtain a second target audio signal in the time domain as the second channel audio signal;

[0012] Output the first channel audio signal and the second channel audio signal to a sound amplification device.

[0013] Optionally, before performing the inverse conversion processing on the first preprocessed audio frame and the second audio frame, the audio processing method further includes: comparing the spectral values of the same frequency points of the first preprocessed audio frame and the second audio frame, and when the ratio of the spectral values of the same frequency points of the first preprocessed audio frame and the second audio frame is greater than a first preset value, removing this frequency point from the first preprocessed audio frame and the second audio frame.

[0014] Optionally, before performing the inverse conversion processing on the first preprocessed audio frame and the second audio frame, the audio processing method further includes: adjusting the volume of the second audio frame according to the volume of the first preprocessed audio frame; when the ratio of the volume of the second audio frame to the volume of the first preprocessed audio frame is less than a second preset value, increasing the volume of the second audio frame to make the volumes of the two equal;

[0015] When the ratio of the volume of the second audio frame to the volume of the first preprocessed audio frame is greater than the second preset value and less than 1, the volume of the second audio frame is not increased.

[0016] Optionally, before performing the inverse conversion processing on the first preprocessed audio frame and the second audio frame, the audio processing method further includes: performing filtering processing on the first preprocessed audio frame and the second audio frame.

[0017] Optionally, the audio signal is subjected to frequency domain conversion and inverse conversion processing through the following formula:

[0018]

[0019] Among them, the upper formula is the frequency domain conversion formula, and the lower one is the inverse conversion processing formula. f(n) is the source function of the audio, N is the length of the discrete signal, n is the sampling times, the sampling interval is [0, 2π], e is the base of the natural logarithm, j is the imaginary unit, and F(k) is the spectral value.

[0020] In a second aspect, an embodiment of the present application provides an audio processing device, which is applicable to a conference microphone. The conference microphone is provided with a first pickup microphone with a forward pickup direction and a second pickup microphone with a pickup direction opposite to that of the first pickup microphone. The audio processing device includes a memory, a processor, and a computer program stored on the memory and executable on the processor. When the computer program is executed by the processor, the steps of the audio processing method in the first aspect are implemented.

[0021] In a third aspect, an embodiment of the present application provides a conference microphone. The conference microphone includes a pickup device and the audio processing device in the second aspect. The pickup device is electrically connected to the audio processing device; the pickup device is fixedly provided with a first pickup microphone and a second pickup microphone. The pickup direction of the first pickup microphone is forward, and the pickup direction of the second pickup microphone is opposite to that of the first pickup microphone.

[0022] Optionally, the conference microphone further includes a microphone body, the front end of the microphone body is set as a sound pickup area, the sound pickup device is fixedly arranged at the middle position in the sound pickup area, the sound pickup device includes a box body and a plurality of sound pickup microphones fixedly arranged in the box body. Among them, the sound pickup microphones include a first sound pickup microphone and a second sound pickup microphone, and sound pickup through holes are arranged on both end faces of the box body.

[0023] Optionally, the microphone further includes a support member and a base, the microphone body is fixedly arranged above the base through the support member, the support member includes a first connecting member fixedly arranged at the rear end of the microphone body and a second connecting member fixedly arranged on the base, and the first connecting member and the second connecting member are rotatably connected together through an adjusting device;

[0024] The adjusting device includes two adjusting plates rotatably connected together. Positioning grooves extending towards the center are arranged on the plate surfaces of the two adjusting plates along the circumferential direction. Fixing grooves are arranged at one ends of the first connecting member and the second connecting member, positioning protrusions are arranged in both fixing grooves, the two adjusting plates are correspondingly fixedly arranged in the two fixing grooves, and the positioning protrusions cooperate with the positioning grooves to prevent the adjusting plates from rotating relative to the fixing grooves.

[0025] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the audio processing method in the first aspect are implemented.

[0026] (III) Beneficial effects

[0027] The beneficial effects of the present application are as follows:

[0028] The present application provides an audio processing method, device, conference microphone and computer-readable storage medium. The conference microphone is provided with a first sound pickup microphone and a second sound pickup microphone with opposite sound pickup directions, and the sound of the speaker is picked up in two directions. The obtained first audio signal and second audio signal are respectively converted into a first audio frame and a second audio frame in the frequency domain space. Taking the second audio frame as a reference, the frequency points that are different from the frequency points of the second audio frame are screened and removed from the first audio frame, greatly reducing the noise and interference generated when the speaker speaks close to the conference microphone due to the airflow generated by the speaker's voice acting on the sound pickup device, solving the technical problem of poor sound pickup effect of the conference microphone, making the speaker's voice clearer, and improving the sound pickup effect of the conference microphone. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a flowchart of the audio processing method of Embodiment 1 of an audio processing method, device, conference microphone and computer-readable storage medium of the present application;

[0030] Figure 2One of the exploded schematic diagrams of the sound pickup device in Embodiment 3 of an audio processing method, apparatus, conference microphone, and computer-readable storage medium according to the present application;

[0031] Figure 3 Cross-sectional schematic diagram of the sound pickup device in Embodiment 3 of an audio processing method, apparatus, conference microphone, and computer-readable storage medium according to the present application;

[0032] Figure 4 Another exploded schematic diagram of the sound pickup device in Embodiment 3 of an audio processing method, apparatus, conference microphone, and computer-readable storage medium according to the present application;

[0033] Figure 5 Three-dimensional schematic diagram of the conference microphone in Embodiment 3 of an audio processing method, apparatus, conference microphone, and computer-readable storage medium according to the present application;

[0034] Figure 6 Exploded schematic diagram of the conference microphone in Embodiment 3 of an audio processing method, apparatus, conference microphone, and computer-readable storage medium according to the present application;

[0035] Figure 7 Cross-sectional schematic diagram of the conference microphone in Embodiment 3 of an audio processing method, apparatus, conference microphone, and computer-readable storage medium according to the present application.

[0036]

Explanation of Reference Numerals

[0037] 1. Microphone body; 11. Outer shell; 111. End face decorative net; 112. Side decorative net; 12. Noise reduction sponge; 13. Central axis fixing member; 131. Sound pickup part; 132. Translucent member; 14. Sound pickup device; 141. Front shell; 1411. Extension part; 1412. Positioning post; 142. Microphone head mounting block; 1420. Step hole; 1421. Ventilation hole; 143. Sound pickup microphone head; 144. Rear shell; 1440. Sound pickup through hole; 15. First circuit board; 16. Bracket;

[0038] 2. Support member; 21. First connecting member; 211. Fixed groove; 212. Protrusion; 22. Adjusting rotation device; 23. Second connecting member;

[0039] 3. Base; 31. Upper cover; 32. Second circuit board; 33. Lower cover; 34. Wire pressing block. Detailed Embodiment

[0040] For better explanation of the present application for easy understanding, the present application will be described in detail below in conjunction with the accompanying drawings through specific embodiments. Among them, the orientation terms such as "upper", "lower",... mentioned herein are based on Figure 2Taking the orientation as a reference, the direction where the front shell 141 is located is defined as "front", and the direction where the rear shell 144 is located is defined as "back".

[0041] An embodiment of the present application provides an audio processing method, device, conference microphone, and computer-readable storage medium. The conference microphone is provided with a first pickup microphone and a second pickup microphone with opposite pickup directions. The voices of speakers are picked up in two directions, and the obtained first audio signal and second audio signal are respectively converted into a first audio frame and a second audio frame in the frequency domain space. Taking the second audio frame as a reference, the frequency points that are different from those of the second audio frame are filtered out and removed from the first audio frame. This greatly reduces the noise and interference generated when the airflow generated by the speaker's voice acts on the pickup device when the speaker is speaking close to the conference microphone, solves the technical problem of poor pickup effect of the conference microphone, ensures the clarity of the speaker's voice, and improves the pickup effect of the conference microphone.

[0042] To better understand the above technical solutions, the exemplary embodiments of the present application will be described in more detail with reference to the accompanying drawings. Although the exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more clear and thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

[0043] Embodiment 1:

[0044] A conference microphone is a transducer for acoustic-electric conversion. When sound waves act on the electroacoustic element, a voltage is generated, and the sound signal is converted into an electric signal. However, when a speaker speaks into the conference microphone, in addition to sound waves, the airflow generated by the speaker's voice will also act on the electroacoustic element. Therefore, there will be a certain amount of airflow noise, miscellaneous noise, and interference mixed in the speaker's voice, resulting in a poor pickup effect of the conference microphone. The closer the speaker is to the conference microphone when speaking, the greater the airflow generated by the speaker's voice, and the more obvious this kind of miscellaneous noise and interference will be.

[0045] To solve this problem, by setting a first pickup microphone with a pickup direction towards the front and a second pickup microphone with a pickup direction opposite to that of the first pickup microphone in the conference microphone, and taking the sound information picked up by the second pickup microphone as a reference, the miscellaneous noise and interference in the sound information picked up by the first pickup microphone can be filtered out, greatly improving the pickup effect of the conference microphone, and solving the technical problem that the airflow generated during the speaker's voice generation forms miscellaneous noise and interference, affecting the pickup effect.

[0046] Specifically, refer to Figure 1, some embodiments of the present application provide an audio processing method, which is applicable to a conference microphone. The conference microphone is provided with a first pickup microphone with a forward pickup direction and a second pickup microphone with a pickup direction opposite to that of the first pickup microphone. The method includes the following steps:

[0047] S11. Obtain a first audio signal of the first pickup microphone and a second audio signal of the second pickup microphone.

[0048] The first pickup microphone faces the speaker directly. The first audio signal includes the voice information of the speaker, as well as the airflow sound, noise and interference generated during the speaker's vocalization process. The pickup direction of the second pickup microphone is opposite to that of the first pickup microphone. Therefore, the second pickup microphone can pick up the voice information of the speaker and is not affected by the airflow generated during the speaker's vocalization process. Thus, the second audio signal includes the voice information of the speaker, but does not include the noise and interference formed by the airflow generated during the speaker's vocalization process.

[0049] S12. Convert the first audio signal and the second audio signal into a first audio frame and a second audio frame in the frequency domain space respectively. Both the first audio frame and the second audio frame include multiple frequency points.

[0050] Convert the first audio signal and the second audio signal from the time domain to the frequency domain, so that the first audio signal and the second audio signal can be calculated and processed to filter out noise and interference.

[0051] S13. Using the second audio frame as a reference, screen and eliminate the frequency points in the first audio frame that are different from the frequency points of the second audio frame to obtain a first preprocessed audio frame.

[0052] Since the second pickup microphone picks up the voice information of the speaker in the reverse direction, that is, the second audio frame only contains the voice information of the speaker and does not include the noise and interference formed by the airflow generated during the speaker's vocalization process. Therefore, using the second audio frame as a reference, the first audio frame is screened and eliminated, and the frequency points that are different from the frequency points of the second audio frame are filtered out. The filtered frequency points are the frequency points of the noise and interference formed by the airflow generated during the speaker's vocalization process.

[0053] S14. Perform an inverse conversion process on the first preprocessed audio frame to obtain a first target audio signal in the time domain as the first channel audio signal, and perform an inverse conversion process on the second audio frame to obtain a second target audio signal in the time domain as the second channel audio signal.

[0054] Perform inverse conversion processing on the first preprocessed audio frame and the second audio frame from which noise and interference have been filtered, converting them from the frequency domain to the time domain to obtain the first-channel audio signal and the second-channel audio signal that can be used for playback. In this way, not only can the signals obtained by the first pickup microphone and the second pickup microphone be synchronously amplified to improve the pickup effect, but also the signals obtained by these two pickup microphones can be amplified separately to achieve the purpose of stereo pickup.

[0055] S15: Output the first-channel audio signal and the second-channel audio signal to the sound playback device.

[0056] The first-channel audio signal and the second-channel audio signal can be separately packaged and output to the sound playback device, or they can be combined and packaged together as a whole and output to the sound playback device.

[0057] In some feasible solutions, after step S13, the method further includes:

[0058] Compare the spectral values of the same frequency points of the first preprocessed audio frame and the second audio frame. When the ratio of the spectral values of the same frequency points of the first preprocessed audio frame and the second audio frame is greater than a first preset value, eliminate this frequency point from the first preprocessed audio frame and the second audio frame.

[0059] In the actual application process, in addition to the voice information of the speaker, the second audio signal may also include a small amount of noise and interference. When the speaker is closer to the conference microphone to speak, the noise and interference will be more obvious and louder. However, since the pickup directions of the first pickup microphone and the second pickup microphone are opposite, the difference in the volume values of the noise and interference in the first audio signal and the second audio signal will be relatively large. Therefore, the ratio of the spectral values of the same frequency points of the first preprocessed audio frame and the second audio frame can be compared. When the ratio of the spectral values of the same frequency points of the first preprocessed audio frame and the second audio frame is greater than the first preset value, eliminate this frequency point from the first preprocessed audio frame and the second audio frame, that is, eliminate the frequency points of the noise and interference in the first preprocessed audio frame and the second audio frame. In the application process, the first preset value can be adjusted according to the actual situation, but it should not be too high or too low. If it is too high, it is difficult to achieve the purpose of eliminating noise and interference. If it is too low, it is easy to mistakenly eliminate the voice information of the speaker. In this embodiment, the value of the first preset value is greater than 1 and can be 1.3, 1.4, etc.

[0060] In some feasible solutions, after step S13, the method further includes:

[0061] Adjust the volume of the second audio frame according to the volume of the first preprocessed audio frame; when the ratio of the volume of the second audio frame to the volume of the first preprocessed audio frame is less than a second preset value, increase the volume of the second audio frame to make their volumes equal;

[0062] When the ratio of the volume of the second audio frame to the volume of the first preprocessed audio frame is greater than the second preset value and less than 1, the volume of the second audio frame is not increased. When the volume difference between the second audio frame and the first preprocessed audio frame is not significant, no volume adjustment operation is performed on the second audio frame, reducing the amount of operation.

[0063] Due to the different sound pickup directions, the sound obtained by the second sound pickup microphone is less than the sound obtained by the first microphone. The volume of the second audio frame is increased to make the volumes of the first preprocessed audio frame and the second audio frame equal, and ultimately to output the first-channel audio signal and the second-channel audio signal at the same volume, making the speaker's voice fuller and clearer. The value range of the second preset value is between 0 and 1 and can be adjusted according to actual needs, such as 0.9, 0.8, etc.

[0064] In some feasible solutions, after step S13, the method further includes: performing filtering processing on the first preprocessed audio frame and the second audio frame. During this filtering process, some noises with frequencies lower than 20Hz, ambient sounds, or high-frequency sounds that are clearly not human voices are filtered out.

[0065] In some feasible solutions, the audio signal is subjected to frequency-domain conversion and inverse conversion processing through the following formula:

[0066]

[0067] Among them, the upper formula is the frequency-domain conversion formula, which converts the audio signal from the time domain to the frequency-domain space for facilitating processing such as filtering. The lower one is the inverse conversion processing formula, which converts the processed audio signal from the frequency domain back to the time domain for playback; f(n) is the source function of the audio, N is the length of the discrete signal, n is the sampling number, the sampling interval is [0, 2π], e is the base of the natural logarithm, j is the imaginary unit, and F(k) is the spectral value.

[0068] This embodiment proposes an audio processing method applicable to a conference microphone. The conference microphone is provided with a first sound pickup microphone and a second sound pickup microphone with opposite sound pickup directions, which pick up the speaker's voice in two directions. The obtained first audio signal and second audio signal are respectively converted into a first audio frame and a second audio frame in the frequency-domain space. Taking the second audio frame as a reference, the frequency points that are different from those of the second audio frame are screened out and removed from the first audio frame, greatly reducing the noise and interference generated when the speaker speaks close to the conference microphone due to the airflow acting on the sound pickup device, solving the technical problem of poor sound pickup effect of the conference microphone, ensuring the clarity of the speaker's voice, and improving the sound pickup effect of the conference microphone.

[0069] Embodiment 2:

[0070] On the basis of the above-mentioned embodiments, this embodiment provides an audio processing device, which is applicable to a conference microphone. The conference microphone is provided with a first sound pickup microphone head with a sound pickup direction facing forward and a second sound pickup microphone head with a sound pickup direction opposite to that of the first sound pickup microphone head. The audio processing device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the computer program is executed by the processor, the following method steps are implemented:

[0071] Acquire a first audio signal of the first sound pickup microphone and a second audio signal of the second sound pickup microphone;

[0072] Convert the first audio signal and the second audio signal into a first audio frame and a second audio frame in a frequency domain space, respectively, wherein the first audio frame and the second audio frame each include a plurality of frequency points;

[0073] Taking the second audio frame as a reference, filtering and removing frequency points different from those of the second audio frame from the first audio frame to obtain a first preprocessed audio frame;

[0074] Performing inverse conversion processing on the first preprocessed audio frame to obtain a first target audio signal in the time domain as a first channel audio signal, and performing inverse conversion processing on the second audio frame to obtain a second target audio signal in the time domain as a second channel audio signal;

[0075] The first channel audio signal and the second channel audio signal are output to a speaker device.

[0076] In a feasible solution, after executing the step of "using the second audio frame as a reference, filtering and removing frequency points that are different from the frequency points of the second audio frame from the first audio frame to obtain a first pre-processed audio frame", the computer program is further executed by the processor to implement the following steps:

[0077] Compare the spectrum values ​​of the same frequency point of the first preprocessed audio frame and the second audio frame. When the ratio of the spectrum values ​​of the same frequency point of the first preprocessed audio frame and the second audio frame is greater than a first preset value, remove the frequency point from the first preprocessed audio frame and the second audio frame.

[0078] In a feasible solution, before executing the step of “performing inverse conversion processing on the first preprocessed audio frame and the second audio frame”, the computer program is further executed by the processor to implement the following steps:

[0079] According to the volume of the first preprocessed audio frame, the volume of the second audio frame is adjusted; when the ratio of the volume of the second audio frame to the volume of the first preprocessed audio frame is less than a second preset value, the volume of the second audio frame is increased to make the volumes of the two equal;

[0080] When the ratio of the volume of the second audio frame to the volume of the first preprocessed audio frame is greater than the second preset value and less than 1, the volume of the second audio frame is not increased. When the volume difference between the second audio frame and the first preprocessed audio frame is not significant, the operation of adjusting the volume of the second audio frame is not performed, reducing the amount of operation.

[0081] In a feasible solution, before the computer program executes the step of "performing inverse conversion processing on the first preprocessed audio frame and the second audio frame", it is further executed by the processor to implement the following steps:

[0082] Perform filtering processing on the first preprocessed audio frame and the second audio frame.

[0083] In a feasible solution, the computer program performs frequency domain conversion and inverse conversion processing on the audio signal through the following formula:

[0084]

[0085] Among them, the upper formula is the frequency domain conversion formula, and the lower one is the inverse conversion processing formula. f(n) is the source function of the audio, N is the length of the discrete signal, n is the number of sampling times, the sampling interval is [0, 2π], e is the base of the natural logarithm, j is the imaginary unit, and F(k) is the spectral value. Among them, the obtained sampling rate can be 18k, the length of the discrete signal is 512 milliseconds (ms), and a sampling rate of 18k means that 1 ms corresponds to 18 sampling points. Then, when the audio length is 512 ms, the corresponding number of sampling points is 9216. After obtaining the 9216 sampling points corresponding to the first audio signal and the second audio signal data in the time domain, the obtained sampling points can be subjected to frequency domain conversion to obtain the spectral information of the first audio signal and the second audio signal data.

[0086] The audio processing device of this embodiment converts the first audio signal and the second audio signal into a first audio frame and a second audio frame in the frequency domain space respectively, and takes the second audio frame as a reference to screen and filter out the frequency points that are different from the frequency points of the second audio frame from the first audio frame, thus removing the noise and interference formed by the airflow acting on the pickup device during the speaker's speech, solving the technical problem of poor pickup effect of the conference microphone, ensuring the clarity of the speaker's voice, and improving the pickup effect of the conference microphone.

[0087] Embodiment 3:

[0088] Refer to Figures 5 to 7 On the basis of the foregoing embodiments, the embodiment of the present application further proposes a conference microphone, including a microphone main body 1, a support member 2, and a base 3. The microphone main body 1 is fixedly arranged above the base 3 through the support member 2, and a pickup device 14 is installed in the microphone main body 1.

[0089] AsFigures 2 to 4 , the sound pickup device 14 includes a box body, a microphone mounting block 142 and a sound pickup microphone 143. The box body includes a front shell 141 and a rear shell 144 that cooperate with each other. Sound pickup through holes 1440 are provided on the end faces of both the front shell 141 and the rear shell 144. The sound pickup through holes 1440 are evenly distributed densely, and their shapes are not limited and can be circular, rectangular, etc. The sound pickup microphone 143 can pick up sounds entering the box body from the front and rear ends of the box body, so that the sound pickup range of the sound pickup device 14 is wider and the sound pickup effect is better. A plurality of positioning posts 1412 are provided at the edge position of the rear end face of the front shell 141, and positioning holes are provided at the corresponding positions of the rear shell 144. The two are inserted and matched with each other to complete the positioning operation of the rear shell 144 body; and, an extension part 1411 is provided on one side of the front shell 141, and the extension part 1411 is snap-connected to the rear shell 144 to fix the front shell 141 and the rear shell 144 together. A wire passing hole is provided at the middle position of the rear shell 144. In the actual production and application process, the shape of the box body is not limited and is determined according to actual needs.

[0090] The microphone mounting block 142 is installed in the box body. The microphone mounting block 142 is provided with three stepped holes 1420, and the three stepped holes 1420 are arranged in a "pin" shape. The sound pickup microphone 143 is placed in the stepped holes 1420. In this embodiment, a plurality of notches are provided on the hole walls of the stepped holes 1420, only the parts between adjacent stepped holes and the central position part of the microphone mounting block 142 are retained, and the four parts are not connected to each other. The sound pickup microphone 143 is clamped in the space surrounded by the remaining hole walls and the box body, greatly reducing the production cost of the microphone mounting block 142. The microphone mounting block 142 is provided with a notch at the corresponding position of the positioning post 1412 to make room for the positioning post 1412.

[0091] There are three sound pickup microphones 143, including a first sound pickup microphone with a sound pickup direction facing forward and a second sound pickup microphone with a sound pickup direction opposite to that of the first sound pickup microphone. Among them, the number of the first sound pickup microphones is one or two.

[0092] In the actual application process, four pickup microphones 143 can also be provided. Among them, the number of the first pickup microphones ranges from one to three, which further enhances the pickup effect. Correspondingly, the microphone mounting block 142 is provided with four stepped holes 1420 and two ventilation holes 1421. The ventilation holes 1421 are located between two of the stepped holes 1420 and extend from the front end to the rear end of the microphone mounting block 142, facilitating the transmission of sound from the rear of the pickup microphone 143 to the front of the pickup microphone 143, enhancing the front and rear pickup effects of the pickup device 14, and also reducing the production cost of the microphone mounting block 142. In addition, notches are provided at the positions where the hole walls of the stepped holes 1420 are in contact with the box body, and notches are also provided at the positions between two adjacent stepped holes. This not only reduces the production cost of the microphone mounting block 142, but also facilitates the installation and disassembly of the pickup microphone 143. Fixed sponges are provided at the positions between the front and rear ends of the microphone mounting block 142 and the box body. The fixed sponges are used to prevent the microphone mounting block 142 from shaking or moving, reducing noise.

[0093] It should be noted that the number of the pickup microphones 143 is adjusted according to actual needs, but at least two are provided. One of them is the first pickup microphone with the pickup direction facing forward, and the other is the second pickup microphone with the pickup direction opposite to that of the first pickup microphone.

[0094] Refer to Figure 5 and Figure 6 As shown in [relevant figure numbers], the microphone main body 1 includes a central axis fixing member 13 and a housing 11. Both ends of the housing 11 are provided with openings, and the housing 11 is sleeved on the central axis fixing member 13. Pickup windows are provided on the side surfaces of the front end of the housing 11, and side decorative meshes 112 are fixedly installed on the pickup windows. The side decorative meshes 112 are evenly provided with fine circular through holes. An end face decorative mesh 111 is snap-fitted to the front end face of the housing 11, which is convenient for disassembly. The end face decorative mesh 111 is evenly provided with drum-shaped or strip-shaped through holes. In actual applications, the shapes of the through holes of the side decorative meshes 112 and the end face decorative meshes 111 are not limited and are set according to actual needs. The shape of the central axis fixing member 13 is adapted to that of the housing 11. A hollow structure is formed at the position corresponding to the pickup window and is set as a pickup portion 131. The pickup portion 131 and the housing 11 of the microphone main body 1 form a pickup chamber, and the pickup device 14 is fixedly installed at the middle position of the pickup portion 131. An installation bracket is provided at the front end of the central axis fixing member 13, and a noise reduction sponge 12 is fixedly installed on the installation bracket. The noise reduction sponge 12 is located between the pickup mesh at the front end face of the housing 11 and the pickup device 14, playing a role in noise reduction. The end face decorative mesh 111 is snap-fitted to the housing 11, and the noise reduction sponge 12 can be taken out from the front end of the housing 11.

[0095] Refer to Figure 6, a groove is formed on the bottom surface of the central axis fixing member 13, and a first circuit board 15 is installed in the groove. The front end of the first circuit board 15 is placed below the sound pickup part 131 and is bolted to the central axis fixing member 13. The other end is provided with a bracket 16. The bolt passes through the bracket 16 and the first circuit board 15 and cooperates with the nut column of the central axis fixing member 13 to fix the first circuit board 15 on the central axis fixing member 13. The bracket 16 serves to protect the first circuit board 15. The first circuit board 15 is provided with an indicator light, and a light-transmitting member 132 is provided at a relative position on the central axis fixing member 13. The light-transmitting member 132 is snap-connected to the central axis fixing member 13, and the light of the indicator light passes through the light-transmitting member 132 and is exposed outside the housing 11. A groove is formed at the top of the central axis fixing member 13 at the rear position of the light-transmitting member 132, reducing the friction contact area between the central axis fixing member 13 and the housing 11 and facilitating the socket connection between the two.

[0096] It can be understood that in the actual production and application process, the shapes of the microphone main body 1, the central axis fixing member 13, and the sound pickup device 14 are not limited, and the shapes of the three are adapted to each other.

[0097] Refer to Figure 6 , the support member 2 includes a first connecting member 21 and a second connecting member 23. The first connecting member 21 is arranged at the rear end of the microphone main body 1 and is bolted to the central axis fixing member 13. The second connecting member 23 is arranged on the base 3 and is bolted to the base 3. The first connecting member 21 and the second connecting member 23 are rotatably connected together through an adjusting device 22.

[0098] Among them, the adjusting device 22 includes two adjusting plates rotatably connected together. Positioning grooves extending towards the center are arranged on the plate surfaces of the two adjusting plates along the circumferential direction. One ends of the first connecting member 21 and the second connecting member 23 are both provided with fixing grooves 211, and positioning protrusions 212 are arranged in the two fixing grooves 211. The two adjusting plates are correspondingly fixed in the two fixing grooves 211, and the positioning protrusions 212 cooperate with the positioning grooves to prevent the adjusting plates from rotating relative to the fixing grooves 211.

[0099] The base 3 includes a matching upper cover 31 and a lower cover 33. A second circuit board 32 is fixedly installed in the base 3, and the second circuit board 32 is electrically connected to the first circuit board 15. The base 3 is also provided with a wire pressing block 34, and the wire pressing block 34 is detachably connected to the base 3. Specifically, the wire pressing block 34 is arranged at the lower position at the rear end of the lower cover 33 and cooperates with the upper cover 31 to fix the wire. When the wire needs to be pulled out, only the wire pressing block 34 needs to be disassembled first, which is convenient to use.

[0100] In the conference microphone of this embodiment, since the first pickup microphone with a forward pickup direction and the second pickup microphone with a pickup direction opposite to that of the first pickup microphone are provided, the voices of the speaker can be picked up from two directions to obtain a first audio signal and a second audio signal. By using the second audio signal as a reference to eliminate the background noise and noise in the first audio signal, the background noise and noise formed by the airflow generated during the speaker's vocalization acting on the pickup device can be removed, solving the technical problem of poor pickup effect of the conference microphone, ensuring the clarity of the speaker's voice, and improving the pickup effect of the conference microphone.

[0101] Embodiment 4:

[0102] Based on the foregoing embodiments, an embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the audio processing method described in the first embodiment or the second embodiment are implemented.

[0103] For the audio processing in this embodiment, the conference microphone is provided with a first pickup microphone with a forward pickup direction and a second pickup microphone with a pickup direction opposite to that of the first pickup microphone. The pickup device can pick up the voices of the speaker from two directions to obtain a first audio signal and a second audio signal. The audio processing device uses the second audio signal as a reference to eliminate the background noise and noise in the first audio signal, so that the background noise and noise formed by the airflow generated during the speaker's vocalization acting on the pickup device can be removed, solving the technical problem of poor pickup effect of the conference microphone, ensuring the clarity of the speaker's voice, and improving the pickup effect of the conference microphone.

[0104] In the description of the present application, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more, unless otherwise specifically defined.

[0105] In the present application, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium; it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0106] In this application, unless otherwise clearly specified or limited, a first feature being "on" or "under" a second feature may mean that the first and second features are in direct contact, or that the first and second features are indirectly in contact via an intermediate medium. Moreover, a first feature being "above", "over" and "on top of" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. A first feature being "under", "below" and "beneath" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than that of the second feature.

[0107] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples.

[0108] Although the embodiments of this application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting this application. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. An audio processing method, applicable to a conference microphone, characterized in that, Including the following steps: Obtain a first audio signal of a first pickup microphone and a second audio signal of a second pickup microphone, wherein the pickup direction of the first pickup microphone faces forward, and the pickup direction of the second pickup microphone is opposite to that of the first pickup microphone; Convert the first audio signal and the second audio signal into a first audio frame and a second audio frame in the frequency domain space respectively, and both the first audio frame and the second audio frame include a plurality of frequency points; Taking the second audio frame as a reference, screen and eliminate the frequency points in the first audio frame that are different from the frequency points of the second audio frame to obtain a first preprocessed audio frame; Adjust the volume of the second audio frame according to the volume of the first preprocessed audio frame; when the ratio of the volume of the second audio frame to the volume of the first preprocessed audio frame is less than a second preset value, increase the volume of the second audio frame to make their volumes equal, and when the ratio is greater than the second preset value and less than 1, do not increase the volume of the second audio frame; Perform inverse conversion processing on the first preprocessed audio frame to obtain a first target audio signal in the time domain as a first channel audio signal, and perform inverse conversion processing on the second audio frame to obtain a second target audio signal in the time domain as a second channel audio signal; Output the first channel audio signal and the second channel audio signal to a sound playback device.

2. The audio processing method according to claim 1, characterized in that, Before performing inverse conversion processing on the first preprocessed audio frame and the second audio frame, the audio processing method further includes: Compare the spectral values of the same frequency points of the first preprocessed audio frame and the second audio frame, and when the ratio of the spectral values of the same frequency points of the first preprocessed audio frame and the second audio frame is greater than a first preset value, eliminate this frequency point from the first preprocessed audio frame and the second audio frame.

3. The audio processing method according to claim 1, characterized in that, Before performing inverse conversion processing on the first preprocessed audio frame and the second audio frame, the audio processing method further includes: performing filtering processing on the first preprocessed audio frame and the second audio frame.

4. The audio processing method according to claim 1, characterized in that, The audio signal is subjected to frequency domain conversion and inverse conversion processing through the following formula: Wherein, the upper formula is the frequency domain conversion formula, and the lower one is the inverse conversion processing formula, f(n) is the source function of the audio, N is the length of the discrete signal, n is the sampling times, the sampling interval is [0, 2π], e is the base of the natural logarithm, j is the imaginary unit, and F(k) is the spectral value.

5. An audio processing device, applicable to a conference microphone, characterized in that, The conference microphone is provided with a first pickup microphone with a forward pickup direction and a second pickup microphone with a pickup direction opposite to that of the first pickup microphone. The audio processing device includes a memory, a processor, and a computer program stored on the memory and executable on the processor. When the computer program is executed by the processor, it implements the method steps described in any one of claims 1 to 4.

6. A conference microphone capable of picking up sounds from the front and the back, characterized in that, Comprising a sound pickup device (14) and the audio processing device as described in claim 5, the sound pickup device (14) being electrically connected to the audio processing device; the sound pickup device (14) is fixedly provided with a first sound pickup microphone and a second sound pickup microphone, the sound pickup direction of the first sound pickup microphone facing forward, and the sound pickup direction of the second sound pickup microphone being opposite to that of the first sound pickup microphone.

7. The conference microphone capable of picking up sounds from the front and the back according to claim 6, characterized in that, The conference microphone further comprises a microphone body (1), the front end of the microphone body (1) being set as a sound pickup area, the sound pickup device (14) being fixedly arranged at the middle position within the sound pickup area, the sound pickup device (14) comprising a box body and a plurality of sound pickup microphones (143) fixedly arranged within the box body, wherein the sound pickup microphones (143) comprise the first sound pickup microphone and the second sound pickup microphone, and sound pickup through holes (1440) are arranged on both end faces of the box body.

8. The conference microphone capable of picking up sounds from the front and the back according to claim 7, characterized in that, The microphone further comprises a support member (2) and a base (3), the microphone body (1) being fixedly arranged above the base (3) through the support member (2), the support member (2) comprising a first connecting member (21) fixedly arranged at the rear end of the microphone body (1) and a second connecting member (23) fixedly arranged on the base (3), the first connecting member (21) and the second connecting member (23) being rotatably connected together through an adjusting device (22); The adjusting device (22) comprises two adjusting plates rotatably connected together, positioning grooves extending towards the center being arranged on the plate surfaces of the two adjusting plates along the circumferential direction, fixing grooves (211) being arranged at one ends of the first connecting member (21) and the second connecting member (23), positioning protrusions (212) being arranged in both of the two fixing grooves (211), the two adjusting plates being correspondingly fixedly arranged in the two fixing grooves (211), and the positioning protrusions (212) being matched with the positioning grooves to prevent the adjusting plates from rotating relative to the fixing grooves (211).

9. A computer-readable storage medium, characterized in that, A computer program is stored on the readable storage medium, and when the computer program is executed by a processor, the steps of the audio processing method as described in any one of claims 1 to 4 are implemented.

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