WO2018064883A1 - Procédé et dispositif d'enregistrement sonore, appareil et support de stockage informatique associés - Google Patents

Procédé et dispositif d'enregistrement sonore, appareil et support de stockage informatique associés Download PDF

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Publication number
WO2018064883A1
WO2018064883A1 PCT/CN2017/081058 CN2017081058W WO2018064883A1 WO 2018064883 A1 WO2018064883 A1 WO 2018064883A1 CN 2017081058 W CN2017081058 W CN 2017081058W WO 2018064883 A1 WO2018064883 A1 WO 2018064883A1
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WO
WIPO (PCT)
Prior art keywords
terminal
sound signal
speaker
recording
collected
Prior art date
Application number
PCT/CN2017/081058
Other languages
English (en)
Chinese (zh)
Inventor
吴建明
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2018064883A1 publication Critical patent/WO2018064883A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
    • H04M1/724—User interfaces specially adapted for cordless or mobile telephones
    • H04M1/72403—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality
    • H04M1/7243—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality with interactive means for internal management of messages
    • H04M1/72433—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality with interactive means for internal management of messages for voice messaging, e.g. dictaphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/64—Automatic arrangements for answering calls; Automatic arrangements for recording messages for absent subscribers; Arrangements for recording conversations
    • H04M1/65—Recording arrangements for recording a message from the calling party
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
    • H04M1/724—User interfaces specially adapted for cordless or mobile telephones
    • H04M1/72403—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
    • H04M1/725—Cordless telephones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones

Definitions

  • the present invention relates to the field of audio processing technologies, and in particular, to a recording method, apparatus, device, and computer storage medium.
  • the mobile phone mainly adopts the means of ordinary recording noise reduction, that is, the noise reduction for the omnidirectional sound, but the noise reduction effect is limited.
  • the noise reduction effect is limited.
  • the cutting-edge technology in the process of imaging, through the three microphones of a specific layout on the mobile phone, combined with the corresponding algorithm, the sound of a specific direction is recorded, and the sound in other directions is suppressed, so that a better recording effect can be obtained.
  • the embodiment of the invention provides a recording method, a device, a device and a computer storage medium, which are used to solve the problem that the directional recording cannot be realized based on the existing terminal in the prior art.
  • a recording method including: a first sound signal, a second sound signal, and/or a terminal collected by two microphones on a terminal according to a recording direction currently set by a terminal;
  • the third sound signal collected by the upper speaker is sent to the terminal a Codec circuit for causing the Codec circuit to process the first sound signal, the second sound signal, and the third sound signal to obtain a sound recording signal corresponding to the current recording direction of the terminal.
  • the recording direction corresponds to the recording mode.
  • the first sound signal collected by the two microphones on the terminal, the second sound signal, and/or the third sound signal collected by the speaker on the terminal are sent to the Codec circuit of the terminal according to the recording direction currently set by the terminal. At least one of the following: when the terminal is in the intercom recording mode, only the first sound signal and the second sound signal collected by the two microphones on the terminal are sent to the Codec circuit of the terminal, or any of the terminals The two sound signals collected by one microphone and the speaker are sent to the Codec circuit of the terminal; when the terminal is in the interview recording mode or the comment recording mode, the first sound signal and the second sound signal collected by the two microphones on the terminal are And the third sound signal collected by the speaker on the terminal is sent to the Codec circuit of the terminal.
  • the method further includes: displaying an adjustable range of the collected acoustic wave region corresponding to the current recording mode on the screen of the terminal; and after obtaining the adjustment instruction issued by the user based on the regional range, adjusting the region range according to the adjustment instruction;
  • the adjusted acquisition acoustic region range controls the Codec circuit to process the received acoustic signal.
  • the speaker on the terminal includes: a first speaker at the terminal earpiece or a second speaker at the back of the terminal, and the third sound signal includes at least one sound signal collected by the first speaker and the second speaker.
  • a recording apparatus including: a sending module, configured to acquire a first sound signal and a second sound collected by two microphones on the terminal according to a recording direction currently set by the terminal; Transmitting the third sound signal collected by the signal on the speaker and/or the terminal to the codec circuit in the terminal; so that the Codec circuit processes the first sound signal, the second sound signal, and the third sound signal to obtain The recording signal corresponding to the current recording direction of the terminal.
  • the sending module includes: a first sending unit, configured to send only the first sound signal and the second sound signal collected by the two microphones on the terminal to the codec in the terminal when the terminal is in the intercom recording mode a circuit, or sending two sound signals collected by any one of the microphones and the speaker on the terminal to the Codec circuit of the terminal; the second sending unit is set to be on the terminal when the terminal is in the interview recording mode or the comment recording mode The first sound signal collected by the two microphones, the second sound signal, and the third sound signal collected by the speaker on the terminal are sent to the Codec circuit of the terminal.
  • the device further includes: a presentation module, configured to display an adjustable range of collected sound wave regions corresponding to the current recording mode on the screen of the terminal; and an adjustment module configured to obtain an adjustment instruction issued by the user based on the region range After that, the area range is adjusted according to the adjustment instruction; the control module is configured to control the Codec circuit to process the received sound signal based on the adjusted range of the collected sound wave area.
  • a presentation module configured to display an adjustable range of collected sound wave regions corresponding to the current recording mode on the screen of the terminal
  • an adjustment module configured to obtain an adjustment instruction issued by the user based on the region range After that, the area range is adjusted according to the adjustment instruction
  • the control module is configured to control the Codec circuit to process the received sound signal based on the adjusted range of the collected sound wave area.
  • a recording apparatus comprising: a first microphone, a second microphone, an analog/digital A/D converter, a digital signal processor DSP, at least one speaker; an A/D converter
  • the input ends of the first microphone, the second microphone, and the speaker are respectively connected; the output end of the A/D converter is connected to the input end of the DSP; and the output end of the DSP is connected to the input end of the speaker.
  • the above device comprises a first speaker and a second speaker
  • the first speaker is a speaker at the terminal earpiece
  • the second speaker is a speaker at the back of the terminal.
  • another recording method including: after starting the recording, collecting the sound signal, and collecting the sound signal comprises at least one of: collecting the first sound signal through the first microphone of the terminal, The second microphone collects the second sound signal, the third sound signal collected through the speaker, and processes the collected sound signal to obtain a recording signal corresponding to the recording direction.
  • the method further includes: determining the current setting of the terminal after the sound signal is collected. Sound direction.
  • a computer storage medium having stored therein computer executable instructions for performing the above recording method.
  • the solution provided by the embodiment of the present invention replaces the microphone in the directional recording with the speaker provided on the terminal, so that the directional recording can be realized without improving the existing terminal, which not only saves cost but also reduces The design difficulty of directional recording equipment.
  • FIG. 1A is a front elevational view of a terminal according to a first embodiment of the present invention.
  • FIG. 1B is a schematic rear view of a terminal according to a first embodiment of the present invention.
  • FIG. 2 is a flowchart of a recording method according to a first embodiment of the present invention
  • FIG. 3 is a schematic view showing a first acoustic wave display according to a second embodiment of the present invention.
  • FIG. 4 is a schematic view showing a second acoustic wave display according to a second embodiment of the present invention.
  • Figure 5 is a schematic view showing a third acoustic wave display according to a second embodiment of the present invention.
  • FIG. 6 is a flowchart of another recording method according to a third embodiment of the present invention.
  • Figure 7 is a circuit schematic diagram of a recording apparatus provided in a third embodiment of the present invention.
  • Figure 8 is a block diagram showing the structure of a recording apparatus provided in a fourth embodiment of the present invention.
  • the present embodiment provides a recording method, which can be performed by a mobile terminal/terminal.
  • the terminal for performing the method in this embodiment is as shown in FIG. 1A and FIG. 1B, wherein 1A is a front view of the terminal, and FIG. 1B is a schematic view of the reverse side of the terminal.
  • the terminal includes a first microphone 11, a second microphone 12, an earpiece 13, and a speaker 14, wherein the earpiece 13 includes a first speaker, and the speaker 14 includes a second speaker.
  • the present invention can also receive the sound signal by using the speaker, and the speaker provided by the terminal is used as the third microphone in the directional recording.
  • the speaker acts as a signal input end of the Codec circuit in the terminal, so that the DSP in the Codec circuit can be processed based on the first microphone, the second microphone, and the sound signal input by the speaker provided by the terminal, thereby achieving the purpose of directional recording.
  • FIG. 2 is a flowchart of a recording method provided in this embodiment. As shown in FIG. 2, the method includes the following processing:
  • Step 201 Determine a recording direction currently set by the terminal.
  • the recording direction refers to the direction from which the sound currently recorded by the terminal is recorded, and the recording direction corresponds to the recording mode, that is, the specified recording mode corresponds to the specified recording direction, for example, the intercom mode corresponds to The recording direction is directly in front of the terminal.
  • the user can control the terminal to switch to the specified recording mode by using the terminal input and the control command, wherein the recording mode of the terminal in this embodiment includes: Record recording mode, comment recording mode, and interview recording mode.
  • the recording mode of the terminal currently located can be determined by detecting the recording function of the terminal.
  • Step 202 According to the recording direction currently set by the terminal, the two microphones on the terminal are taken. The collected first sound signal, the second sound signal and/or the third sound signal collected by the speaker on the terminal are sent to the codec Codec circuit in the terminal; so that the Codec circuit pairs the first sound signal and the second sound The signal and the third sound signal are processed to obtain a recording signal corresponding to the recording direction currently set by the terminal.
  • the first sound signal collected by the two microphones on the terminal, the second sound signal, and/or the third sound signal collected by the speaker on the terminal are sent to the Codec in the terminal according to the recording direction currently set by the terminal.
  • the circuit may specifically include: when the terminal is in the intercom recording mode, transmitting only the first sound signal and the second sound signal collected by the two microphones on the terminal to the Codec circuit in the terminal, or The two sound signals collected by any one of the microphones and the speaker are sent to the Codec circuit of the terminal; when the terminal is in the interview recording mode or the comment recording mode, the first sound collected by the two microphones on the terminal The signal and the second sound signal and the third sound signal collected by the speaker on the terminal are sent to the Codec circuit of the terminal.
  • the method provided in this embodiment may further include: processing an adjustable range of collected sound waves corresponding to the current recording mode on the screen of the terminal; After the adjustment command is issued, the range of the area is adjusted according to the adjustment instruction; the Codec circuit is controlled to process the received sound signal based on the adjusted range of the collected acoustic wave area to suppress unwanted sound waves.
  • the speaker on the terminal involved in the embodiment includes: a first speaker at the terminal earpiece and a second speaker disposed at the back of the terminal, and based on the third sound signal, the third sound signal includes at least a first speaker and a second speaker. All the way to the sound signal.
  • the sound signal collected by the speaker on the terminal is weak, the sound signal can be compensated before the sound signal collected through the speaker is sent to the Codec circuit, for example, the sound signal can be The frequency and loudness are compensated.
  • the embodiment provides a method for recording during the imaging process.
  • the method mainly describes the process of recording the terminal in different recording modes and adjusting the sound wave collection area according to the user operation.
  • the sound wave display map shown in FIG. 3 can be displayed on the terminal screen, indicating that the sound wave region collected during the video recording is in the clip shown in FIG.
  • the angle 1 and the angle 2 ie within a certain range of the front and rear of the screen of the mobile phone
  • the sound at other angles outside the two angles is suppressed, and at the same time, the user can adjust the angle between the two curves through the terminal, thereby
  • the size of the sound wave region collected by the control terminal can suppress other sound waves except the adjusted sound wave collection region by an algorithm in the DSP in the Codec circuit in the terminal. to realise.
  • the sound wave display map shown in FIG. 4 can be displayed on the terminal screen, indicating that the sound wave region collected during the imaging is within the angle 3 as shown in FIG. 4 ( That is, within a certain range of the front of the screen of the mobile phone, the sound of other angles is suppressed.
  • the user can control the size of the collected acoustic wave region by adjusting the angle between the two curves. Specifically, the size of the acoustic wave region collected by the control terminal can be adjusted by the algorithm in the DSP in the Codec circuit in the terminal. This is achieved by suppressing other sound waves outside the sound wave collection area.
  • the sound wave display map shown in FIG. 5 can be displayed on the terminal screen, indicating that the sound wave region collected during the imaging is within the angle 4 as shown in FIG. 5 ( That is, the screen of the mobile phone is within a certain range of the user), and the sound of other angles is suppressed.
  • the user can control the size of the collected acoustic wave region by adjusting the angle between the two curves. Specifically, the size of the acoustic wave region collected by the control terminal can be adjusted by the algorithm in the DSP in the Codec circuit in the terminal. Other sounds outside the sound wave collection area Wave suppression is achieved.
  • FIG. 6 is a flowchart of the method. As shown in FIG. 6, the method includes the following processing:
  • Step 601 After starting the recording, collecting a sound signal
  • Acquiring the sound signal includes at least one of: acquiring a first sound signal through a first microphone of the terminal, acquiring a second sound signal through the second microphone, and collecting a third sound signal through the speaker;
  • Step 602 Process the collected sound signal to obtain a recording signal corresponding to the recording direction.
  • the method provided in this embodiment further includes: determining a recording direction currently set by the terminal.
  • determining the recording direction currently set by the terminal may be further determined according to an instruction input by the user, and may also be determined according to a recording mode currently in which the terminal is currently located. Based on this, different recording modes correspond to different recording directions, and the recording direction refers to After receiving the sound signal, the terminal only retains the recording signal received in the recording direction, and suppresses the recording signal in other directions except the recording direction.
  • the embodiment provides a recording device, which can separately or simultaneously feed the recording signal of the earpiece or the speaker to the receiver or the speaker itself by changing the Codec hardware circuit in the mobile terminal without affecting the function of the handset or the speaker itself playing the sound.
  • the Codec circuit (in the case of simultaneously feeding back the recording signal of the earpiece or speaker to the Codec circuit, it is equivalent to feeding the four-way sound signal to the Codec circuit at the same time), instead of recording the third microphone in the directional recording.
  • the algorithm in the DSP of the Codec circuit is used to process the three sounds that are taken to suppress unwanted sounds. By retaining useful voice information, it is possible to eliminate the sound signals that the user does not need, and to obtain a purer voice signal, so that the user can get a better experience.
  • the recording apparatus includes the following components: a first microphone 61, a second microphone 62, an A/D converter 63, a DSP 64, and a first The speaker 65 and the second speaker 66; the A/D converter 63 are respectively connected to the input ends of the first microphone 61, the second microphone 62, the first speaker 65, and the second speaker 66; the output end of the A/D converter 63 is The input ends of the DSP 64 are connected.
  • the present embodiment is described by taking only two speakers of the terminal as an example. In theory, the terminal involved in the embodiment has at least one speaker.
  • the speaker on the terminal includes: a speaker at the terminal earpiece and a speaker disposed at the back of the terminal.
  • the first microphone and the second microphone may be disposed at symmetric positions on the upper and lower sides of the terminal.
  • the present embodiment provides a recording apparatus, which is configured to implement the recording method provided by the first embodiment and the second embodiment
  • FIG. 8 is a structural block diagram of the apparatus.
  • the apparatus 80 includes the following component:
  • the determining module 81 is configured to determine a recording direction currently set by the terminal;
  • the sending module 82 is configured to send, according to the recording direction currently set by the terminal, the first sound signal collected by the two microphones on the terminal, the second sound signal, and/or the third sound signal collected by the speaker on the terminal to a codec circuit in the terminal; the Codec circuit processes the first sound signal, the second sound signal, and the third sound signal to obtain a sound recording signal corresponding to the recording direction currently set by the terminal.
  • the sending module 82 involved in the embodiment may specifically include: a first sending unit, When the terminal is in the intercom recording mode, only the first sound signal and the second sound signal collected by the two microphones on the terminal are sent to the Codec circuit in the terminal, or any one of the microphones on the terminal is The two sound signals collected by the speaker are sent to the Codec circuit of the terminal; the second sending unit is set to be the first sound signal collected by the two microphones on the terminal when the terminal is in the interview recording mode or the comment recording mode. And the second sound signal and the third sound signal collected by the speaker on the terminal are sent to the Codec circuit of the terminal.
  • the foregoing apparatus 80 may further include:
  • the presentation module is configured to display an adjustable range of the collected acoustic wave region corresponding to the current recording mode on the screen of the terminal; the adjustment module is configured to adjust the region range according to the adjustment instruction after acquiring the adjustment instruction issued by the user based on the region range
  • the control module is configured to control the Codec circuit to process the received sound signal based on the adjusted range of acquired acoustic wave regions.
  • the third sound signal in this embodiment includes at least one sound signal collected by the first speaker and the second speaker.
  • the embodiment of the invention further describes a computer storage medium, wherein the computer storage medium stores computer executable instructions, and the computer executable instructions are configured to perform the recording method shown in FIG. 2 or FIG. 6.
  • the disclosed apparatus and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner such as: multiple units or components may be combined, or Can be integrated into another system, or some features can be ignored or not executed.
  • the coupling, or direct coupling, or communication connection of the components shown or discussed may be indirect coupling or communication connection through some interfaces, devices or units, and may be electrical, mechanical or other forms. of.
  • the units described above as separate components may or may not be physically separated, and the components displayed as the unit may or may not be physical units, that is, may be located in one place or distributed to multiple network units; Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may be separately used as one unit, or two or more units may be integrated into one unit;
  • the unit can be implemented in the form of hardware or in the form of hardware plus software functional units.
  • the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed.
  • the foregoing storage device includes the following steps: the foregoing storage medium includes: a mobile storage device, a random access memory (RAM), a read-only memory (ROM), a magnetic disk, or an optical disk.
  • the foregoing storage medium includes: a mobile storage device, a random access memory (RAM), a read-only memory (ROM), a magnetic disk, or an optical disk.
  • RAM random access memory
  • ROM read-only memory
  • magnetic disk or an optical disk.
  • the above-described integrated unit of the present invention may be stored in a computer readable storage medium if it is implemented in the form of a software function module and sold or used as a standalone product.
  • the technical solution of the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product, which is stored in a storage medium and includes a plurality of instructions for making
  • a computer device which may be a personal computer, server, or network device, etc.
  • the foregoing storage medium includes various media that can store program codes, such as a mobile storage device, a RAM, a ROM, a magnetic disk, or an optical disk.
  • a recording method, apparatus, device, and computer storage medium provided by an embodiment of the present invention have the following beneficial effects: by using a speaker provided on the terminal instead of the microphone in the directional recording, so that the existing terminal is not needed On the basis of improvement, directional recording can be realized, which not only saves cost, but also reduces the design difficulty of directional recording equipment.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Business, Economics & Management (AREA)
  • General Business, Economics & Management (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Telephone Function (AREA)

Abstract

L'invention concerne un procédé et un dispositif d'enregistrement sonore, ainsi qu'un appareil et un support de stockage informatique associés, permettant de régler le problème de l'art antérieur selon lequel un enregistrement sonore directionnel ne peut être réalisé sur la base de terminaux existants. Le procédé comprend une étape consistant à émettre, en fonction de la direction d'enregistrement sonore actuellement paramétrée d'un terminal, des premier et deuxième signaux sonores obtenus par deux microphones sur le terminal et/ou un troisième signal sonore obtenu par un haut-parleur sur le terminal à destination du circuit codec du terminal, de telle sorte que le circuit codec traite les premier, deuxième et troisième signaux sonores de façon à obtenir un signal sonore enregistré correspondant à l'actuelle direction d'enregistrement sonore du terminal. La solution permet de réaliser un enregistrement sonore directionnel sans avoir à améliorer les terminaux existants. De plus, elle réduit les coûts tout en diminuant la difficulté de conception d'un appareil d'enregistrement sonore directionnel.
PCT/CN2017/081058 2016-10-09 2017-04-19 Procédé et dispositif d'enregistrement sonore, appareil et support de stockage informatique associés WO2018064883A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201610883463.6A CN107920157A (zh) 2016-10-09 2016-10-09 一种录音方法、装置及设备
CN201610883463.6 2016-10-09

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WO2018064883A1 true WO2018064883A1 (fr) 2018-04-12

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CN113973141B (zh) * 2020-07-22 2023-03-28 华为技术有限公司 保护壳、信号处理的方法、移动设备和电子设备
CN114171040A (zh) * 2021-10-27 2022-03-11 歌尔科技有限公司 一种音频降噪方法及音频监控装置

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CN101727965A (zh) * 2008-10-29 2010-06-09 三洋电机株式会社 录音装置
US20110181452A1 (en) * 2010-01-28 2011-07-28 Dsp Group, Ltd. Usage of Speaker Microphone for Sound Enhancement
CN203883980U (zh) * 2014-05-27 2014-10-15 山东共达电声股份有限公司 一种声电转换芯片、声电转换系统及移动终端
CN105611458A (zh) * 2015-11-11 2016-05-25 广东欧珀移动通信有限公司 一种移动终端的定向录音控制方法及装置

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Publication number Priority date Publication date Assignee Title
CN101727965A (zh) * 2008-10-29 2010-06-09 三洋电机株式会社 录音装置
US20110181452A1 (en) * 2010-01-28 2011-07-28 Dsp Group, Ltd. Usage of Speaker Microphone for Sound Enhancement
CN203883980U (zh) * 2014-05-27 2014-10-15 山东共达电声股份有限公司 一种声电转换芯片、声电转换系统及移动终端
CN105611458A (zh) * 2015-11-11 2016-05-25 广东欧珀移动通信有限公司 一种移动终端的定向录音控制方法及装置

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