WO2020252886A1 - Procédé de capture de son directionnelle, dispositif d'enregistrement et support de stockage - Google Patents

Procédé de capture de son directionnelle, dispositif d'enregistrement et support de stockage Download PDF

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Publication number
WO2020252886A1
WO2020252886A1 PCT/CN2019/101711 CN2019101711W WO2020252886A1 WO 2020252886 A1 WO2020252886 A1 WO 2020252886A1 CN 2019101711 W CN2019101711 W CN 2019101711W WO 2020252886 A1 WO2020252886 A1 WO 2020252886A1
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WO
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Prior art keywords
sound
pointing
directional
noise
sounds
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PCT/CN2019/101711
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English (en)
Chinese (zh)
Inventor
陈永金
Original Assignee
深圳壹秘科技有限公司
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Publication of WO2020252886A1 publication Critical patent/WO2020252886A1/fr

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    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/0208—Noise filtering
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/04—Time compression or expansion
    • G10L21/055—Time compression or expansion for synchronising with other signals, e.g. video signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/06—Protocols specially adapted for file transfer, e.g. file transfer protocol [FTP]

Definitions

  • This application relates to the field of audio processing technology, and in particular to a directional sound pickup method, recording device and storage medium.
  • the main purpose of this application is to provide a directional sound pickup method, recording device and storage medium, aiming to solve the technical problem that the directional sound pickup function of the recording device cannot achieve the expected effect.
  • this application provides a directional sound pickup method, which includes the following steps:
  • the target sound corresponding to the directional sound pickup instruction among the plurality of target sounds is used as a pointing sound, and the noise of the pointing sound is reduced.
  • the step of compensating the time delay of the multiple target sounds so that the timings of the multiple target sounds are consistent includes:
  • the timing of the standard sound is determined, and the timing of the non-standard sound is adjusted according to the timing of the standard sound, so that the timing of the non-standard sound is consistent with the timing of the standard sound.
  • the step of acquiring the collected multiple target sounds and the directional sound pickup instruction input by the user includes:
  • the method further includes:
  • the step of using the target sound corresponding to the directional sound pickup instruction among the plurality of target sounds as a pointing sound includes:
  • the corresponding pointing azimuth is determined according to the horizontal angle value and the elevation angle value, and a target sound corresponding to the pointing azimuth among the multiple target sounds is used as the pointing sound.
  • the method further includes:
  • the normalized pointing sound is input into a preset filter to enhance the pointing sound.
  • the step of reducing the noise of the pointing sound includes:
  • the method further includes:
  • the model of the microphone array is ES7210, and the directivity of the microphone array is at least one of omnidirectional, cardioid, super cardioid, and figure-8;
  • the preset filter is at least one of a spatial filter, a time domain filter, an auditory filter, and a Wiener filter;
  • the preset noise estimation algorithm is the logarithmic spectrum amplitude optimal estimation method and/or MCRA (Minima-Controlled-Recursive-Averaging Algorithms, recursive average) algorithm.
  • the present application also provides a recording device, the recording device comprising: a memory, a processor, and computer readable instructions stored in the memory and running on the processor, the When the computer-readable instructions are executed by the processor, the steps of the directional sound pickup method described above are realized.
  • the present application also provides a computer-readable storage medium having computer-readable instructions stored on the computer-readable storage medium, and when the computer-readable instructions are executed by a processor, the above-mentioned orientation is achieved.
  • the steps of the pickup method are not limited to, but not limited to, but not limited to, but not limited to, but not limited to, but not limited to, but not limited to, but not limited to, but not limited to, but not limited to, but not limited to the pickup method.
  • This application provides a directional sound pickup method, a recording device, and a storage medium.
  • the directional sound pickup method acquires multiple collected target sounds and directional sound pickup instructions input by a user, and responds to the multiple target sounds. Delay compensation to make the timings of the multiple target sounds consistent; use the target sound corresponding to the directional sound pickup instruction among the multiple target sounds as the pointing sound, and perform noise reduction on the pointing sound.
  • the recording device when the recording device picks up the sound, it compensates for the time delay of the recorded sound in all directions, and then accurately picks up the sound in the direction specified by the user, and performs noise reduction processing on the noise in the picked up sound, thereby reducing non-direction
  • the sound of the direction interferes with the recording result, so that the directional sound pickup of the recording equipment achieves the best effect.
  • Figure 1 is a schematic structural diagram of a hardware operating environment involved in a solution of an embodiment of the present application
  • FIG. 2 is a schematic flowchart of an embodiment of a directional sound pickup method according to the present application
  • FIG. 3 is a detailed schematic diagram of the steps of compensating the time delay of the multiple target sounds to make the sequence of the multiple target sounds consistent according to the application;
  • FIG. 4 is a schematic flowchart of another embodiment of the directional sound pickup method according to the present application.
  • FIG. 1 is a schematic diagram of a terminal structure of a hardware operating environment involved in a solution of an embodiment of the present application.
  • the terminal of this application is a device.
  • the device can be a recording device, or a terminal device with a storage function, such as a server, a computer, a smart phone, a tablet computer, and a portable computer.
  • the terminal may include a processor 1001, such as a CPU, a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005.
  • the communication bus 1002 is used to implement connection and communication between these components.
  • the user interface 1003 may include a display screen (Display) and an input unit such as a keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface and a wireless interface.
  • the network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a WI-FI interface).
  • the memory 1005 can be a high-speed RAM memory or a stable memory (non-volatile memory), such as disk storage.
  • the memory 1005 may also be a storage device independent of the foregoing processor 1001.
  • the terminal may also include a camera, a Wi-Fi module, etc., which will not be repeated here.
  • terminal structure shown in FIG. 1 does not constitute a limitation on the terminal, and may include more or fewer components than shown in the figure, or combine some components, or arrange different components.
  • the network interface 1004 is mainly used to connect to a back-end server and perform data communication with the back-end server;
  • the user interface 1003 mainly includes an input unit such as a keyboard.
  • the keyboard includes a wireless keyboard and a wired keyboard to connect to the client.
  • Perform data communication with the client; and the processor 1001 can be used to call computer readable instructions stored in the memory 1005 and perform the following operations:
  • the target sound corresponding to the directional sound pickup instruction among the plurality of target sounds is used as a pointing sound, and the noise of the pointing sound is reduced.
  • processor 1001 may call computer-readable instructions stored in the memory 1005, and also perform the following operations:
  • the timing of the standard sound is determined, and the timing of the non-standard sound is adjusted according to the timing of the standard sound, so that the timing of the non-standard sound is consistent with the timing of the standard sound.
  • processor 1001 may call computer-readable instructions stored in the memory 1005, and also perform the following operations:
  • processor 1001 may call computer-readable instructions stored in the memory 1005, and also perform the following operations:
  • the step of using the target sound corresponding to the directional sound pickup instruction among the plurality of target sounds as a pointing sound includes:
  • the corresponding pointing azimuth is determined according to the horizontal angle value and the elevation angle value, and a target sound corresponding to the pointing azimuth among the multiple target sounds is used as the pointing sound.
  • processor 1001 may call computer-readable instructions stored in the memory 1005, and also perform the following operations:
  • the normalized pointing sound is input into a preset filter to enhance the pointing sound.
  • processor 1001 may call computer-readable instructions stored in the memory 1005, and also perform the following operations:
  • processor 1001 may call computer-readable instructions stored in the memory 1005, and also perform the following operations:
  • the specific embodiment of the terminal is basically the same as the following embodiments of the directional sound pickup method, and will not be repeated here.
  • FIG. 2 is a schematic flowchart of an embodiment of a directional sound pickup method according to the present application.
  • the directional sound pickup method provided in this embodiment includes the following steps:
  • Step S10 Acquire the collected multiple target sounds and the directional sound pickup instruction input by the user, and compensate for the time delay of the multiple target sounds, so that the timings of the multiple target sounds are consistent;
  • the recording device in this embodiment has multiple built-in microphones to acquire multiple collected target sounds and a directional sound pickup instruction input by the user.
  • the directional sound pickup instruction is an instruction input by the user to determine the pickup position. It is easy to understand that the positions of the multiple microphones built into the recording device and the sound source are different, so the timing of the multiple target sounds collected is also different. Generally speaking, the microphone closest to the sound source receives the sound first, and the microphone furthest from the sound source receives the sound last, and the sound is longer. In this embodiment, time delay compensation is performed on multiple target sounds, so that the timings of the multiple target sounds are consistent.
  • Step S20 Use the target sound corresponding to the directional sound pickup instruction among the multiple target sounds as the pointing sound, and perform noise reduction on the pointing sound.
  • the directional pickup instruction contains azimuth information
  • extract the target sound corresponding to the azimuth information from the multiple target sounds and use the target sound as the pointing sound
  • the pointing sound is the sound recorded by the recording device and corresponding to the direction specified by the user. Noise reduction is performed on pointing sound to enhance the directional sound pickup effect of recording equipment.
  • This embodiment provides a directional sound pickup method, which acquires a plurality of collected target sounds and a directional sound pickup instruction input by a user, and compensates for the delay of the plurality of target sounds, so that the plurality of target sounds The time sequence of is consistent; the target sound corresponding to the directional sound pickup instruction among the multiple target sounds is used as the pointing sound, and the noise of the pointing sound is reduced.
  • the recording device when the recording device picks up the sound, it compensates for the time delay of the recorded sound in all directions, and then accurately picks up the sound in the direction specified by the user, and performs noise reduction processing on the noise in the picked up sound, thereby reducing non-direction
  • the sound of the direction interferes with the recording result, so that the directional sound pickup of the recording equipment achieves the best effect.
  • FIG. 3 is a detailed schematic diagram of the steps of compensating the time delay of the multiple target sounds to make the sequence of the multiple target sounds consistent according to the application.
  • the step of compensating the time delay of a target sound so that the sequence of the multiple target sounds is consistent includes:
  • Step S11 Determine the sound collected by the preset reference microphone from the collected multiple target sounds, and use the sound collected by the preset reference microphone as the standard sound.
  • the multiple collected target sounds excluding the standard sound Target sound as non-standard sound;
  • Step S12 Determine the timing of the standard sound, and adjust the timing of the non-standard sound according to the timing of the standard sound, so that the timing of the non-standard sound is consistent with the timing of the standard sound.
  • the recording device includes multiple microphones, and the sound recorded by each microphone is different in timing.
  • a microphone is preset as the reference microphone, and the sound collected by the preset reference microphone is used as the standard sound, then in the process of delay compensation for the target sound, the timing of the standard sound recorded by the recording device As a standard; the target sounds other than the standard sound among the collected multiple target sounds are regarded as non-standard sounds, that is, in the process of delay compensation for the target sound, only the non-standard sounds are needed. Make timing adjustments.
  • the timing of the standard sounds is determined, and the timing of the standard sounds is used as a reference to adjust the timing of the non-standard sounds so that the timing of the non-standard sounds is consistent with the standard
  • the sound sequence is consistent, so that the sequence of the acquired multiple target sounds is consistent, and the time delay compensation for the recorded sound is realized.
  • the target sound is compensated for the time delay in the above-mentioned manner, thereby reducing the interference of non-directional sound on the recording result.
  • the step of acquiring the collected multiple target sounds and the directional sound pickup instruction input by the user includes:
  • Step S13 Generate a corresponding directional sound pickup instruction according to the user's operation on the display interface, and collect sound through each microphone in the microphone array according to the directional sound pickup instruction;
  • Step S14 Use the sound collected by each microphone as the target sound.
  • the corresponding directional pickup instruction is generated according to the user's operation on the display interface. It is easy to understand that the user can also generate the corresponding directional pickup instruction in other ways. For example, the user can generate the corresponding directional pickup instruction by adjusting the position of the terminal. Corresponding directional sound pickup instructions; the user can also directly input location information to generate corresponding directional sound pickup instructions, which is not limited in this embodiment. After acquiring the directional sound pickup instruction input by the user, the sound is collected through each microphone in the microphone array according to the directional sound pickup instruction.
  • the microphone array in the microphone array is composed of a 6+1 mode, that is, 6 microphones surround the middle microphone to form a closed loop; the model of the microphone array is ES7210, and the direction of the microphone array Sex is at least one of omnidirectional, cardioid, super cardioid, and figure-eight.
  • the sound of the environment where the recording device is located is collected in all directions, and the sound collected by each microphone is used as the target sound.
  • the sound around the recording device is collected in an all-round manner and used as the target sound, thereby ensuring that the user can pick up the sound in a specified direction of 360 degrees.
  • step S10 After acquiring the multiple target sounds collected and the directional sound pickup instruction input by the user in the above step S10, it further includes:
  • Step S30 Determine the corresponding horizontal angle value and the elevation angle value according to the directional sound pickup instruction input by the user, and display the horizontal angle value and the elevation angle value on the display interface;
  • the step of using the target sound corresponding to the directional sound pickup instruction among the plurality of target sounds as a pointing sound includes:
  • Step S21 Determine the corresponding pointing azimuth according to the horizontal angle value and the elevation angle value, and use the target sound corresponding to the pointing azimuth among the multiple target sounds as the pointing sound.
  • the directional sound pickup instruction input by the user includes the position information for the user to determine the pickup direction, and the directional sound pickup instruction includes the horizontal angle value and the elevation angle value.
  • the directional sound pickup instruction includes the horizontal angle value and the elevation angle value.
  • the direction in which the user intends to pick up the sound can be determined according to the horizontal angle value and the elevation angle value, and the above direction is regarded as the pointing direction. Since a target sound is collected by a microphone, and the position of each microphone on the recording device is fixed, the corresponding microphone on the recording device can be determined according to the horizontal angle value and the elevation angle value, and the microphone is recorded The target sound serves as the pointing sound. In this embodiment, in the above manner, the corresponding microphone on the recording device is determined according to the directional sound pickup instruction, and the sound recorded by the microphone is used as the directional sound to accurately realize the directional sound pickup.
  • step S20 uses the target sound corresponding to the directional sound pickup instruction among the multiple target sounds as the pointing sound
  • the method further includes:
  • Step S40 performing signal sampling and normalization processing on the pointing sound
  • Step S50 Input the normalized pointing sound into a preset filter to enhance the pointing sound.
  • signal sampling is performed on the pointing sound.
  • the above-mentioned signal sampling is to collect the instantaneous value of the sound data point by point according to a certain time interval, thereby realizing the discretization of the sound.
  • the discrete sound can also be Fourier transformed, and different sound data can be weighted according to the different frequency bands used, and multiple discrete sound data can be classified One treatment.
  • After normalizing the pointing sound further input the normalized pointing sound into a preset filter to enhance the pointing sound and improve the performance of the pointing sound in a reverberant environment.
  • the preset filter is at least one of a spatial filter, a time domain filter, an auditory filter, and a Wiener filter.
  • the sound directed in the direction is enhanced, thereby improving the effect of directional sound pickup.
  • the step of reducing the noise of the pointing sound includes:
  • Step S22 input the pointing sound into a preset noise estimation algorithm to identify the noise in the pointing sound;
  • Step S23 Determine the frequency, amplitude and phase of the noise, and output the anti-noise corresponding to the noise to reduce the noise of the pointing sound, wherein the anti-noise is the same frequency and amplitude as the noise And sound waves of opposite phase.
  • a noise estimation algorithm is also preset.
  • the preset noise estimation algorithm is the logarithmic spectrum amplitude optimal estimation method and/or the MCRA algorithm.
  • the preset noise estimation algorithm is used to perform noise estimation on the pointing sound to identify Point out the noise in the sound, and determine the frequency, amplitude and phase of the noise. Then input the anti-noise sound wave with the same frequency, the same amplitude and the opposite phase to the pointing sound to achieve the phase cancellation with the noise, thereby reducing the noise of the pointing sound and reducing the interference of the noise source in the pointing sound to the recording result. Make the directional pickup of recording equipment achieve the best effect.
  • FIG. 4 is a schematic flowchart of another embodiment of the directional sound pickup method according to the present application.
  • step S20 performs noise reduction on the pointing sound, it further includes:
  • step S60 the noise-reduced pointing sound is uploaded to the cloud server, and after the reading instruction input by the user is obtained, the corresponding pointing sound is downloaded from the cloud server.
  • the pointing sound at this time is the most ideal.
  • there is also an automatic backup function of pointing sound and the noise-reduced pointing sound is uploaded to the cloud server, so that the user can extract the pointing sound at any time.
  • the server downloads and plays the corresponding pointing sound.
  • the model of the microphone array is ES7210, and the directivity of the microphone array is at least one of omnidirectional, cardioid, super cardioid, and figure-8;
  • the preset filter is at least one of a spatial filter, a time domain filter, an auditory filter, and a Wiener filter;
  • the preset noise estimation algorithm is the logarithmic spectrum amplitude optimal estimation method and/or MCRA (Minima-Controlled-Recursive-Averaging Algorithms, recursive average) algorithm.
  • an embodiment of the present application also proposes a computer-readable storage medium having computer-readable instructions stored thereon, and when the computer-readable instructions are executed by a processor, the following operations are implemented:
  • the target sound corresponding to the directional sound pickup instruction among the plurality of target sounds is used as a pointing sound, and the noise of the pointing sound is reduced.
  • the timing of the standard sound is determined, and the timing of the non-standard sound is adjusted according to the timing of the standard sound, so that the timing of the non-standard sound is consistent with the timing of the standard sound.
  • the step of using the target sound corresponding to the directional sound pickup instruction among the plurality of target sounds as a pointing sound includes:
  • the corresponding pointing azimuth is determined according to the horizontal angle value and the elevation angle value, and a target sound corresponding to the pointing azimuth among the multiple target sounds is used as the pointing sound.
  • the normalized pointing sound is input into a preset filter to enhance the pointing sound.
  • the method of the embodiment can be realized by means of software plus the necessary general hardware platform, of course, it can also be realized by Over hardware, but in many cases the former is a better implementation.
  • the technical solution of this application essentially or the part that contributes to the existing technology can be embodied in the form of a software product.
  • the computer software product is stored in a storage medium (such as ROM/RAM, magnetic disk, optical The disk) includes several instructions to make a terminal device (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) execute the methods described in the various embodiments of the present application.

Abstract

La présente invention concerne un procédé de capture de son directionnelle, un dispositif d'enregistrement et un support de stockage, le procédé consistant à : acquérir une pluralité de sons cibles collectés et une instruction de capture de son directionnelle entrée par un utilisateur, et effectuer une compensation de retard sur la pluralité de sons cibles de telle sorte que la temporisation de la pluralité de sons cibles est la même (S10) ; et utiliser un son cible parmi la pluralité de sons cibles qui correspond à l'instruction de capture de son directionnelle en tant que son spécifié, et effectuer une réduction de bruit sur le son spécifié (S20). Lorsqu'un dispositif d'enregistrement capture des sons, une compensation de retard est effectuée sur des sons enregistrés à partir de toutes les directions, puis un son dans une direction spécifiée par l'utilisateur est capturé avec précision, et un traitement de réduction de bruit est effectué sur le bruit dans le son capturé, permettant ainsi de réduire le brouillage de sons dans les directions non spécifiées sur un résultat d'enregistrement de telle sorte que la capture de son directionnelle du dispositif d'enregistrement parvient à un effet optimal.
PCT/CN2019/101711 2019-06-17 2019-08-21 Procédé de capture de son directionnelle, dispositif d'enregistrement et support de stockage WO2020252886A1 (fr)

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