WO2017206619A1 - 一种音量调节的方法及装置 - Google Patents

一种音量调节的方法及装置 Download PDF

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WO2017206619A1
WO2017206619A1 PCT/CN2017/081328 CN2017081328W WO2017206619A1 WO 2017206619 A1 WO2017206619 A1 WO 2017206619A1 CN 2017081328 W CN2017081328 W CN 2017081328W WO 2017206619 A1 WO2017206619 A1 WO 2017206619A1
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sound
volume gain
volume
gain
sound source
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PCT/CN2017/081328
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English (en)
French (fr)
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刘智辉
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华为技术有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2430/00—Signal processing covered by H04R, not provided for in its groups
    • H04R2430/01—Aspects of volume control, not necessarily automatic, in sound systems

Definitions

  • the present invention relates to the field of sound processing technologies, and in particular, to a method and apparatus for volume adjustment.
  • AGC Automatic Gain Control
  • the invention provides a method and a device for adjusting the volume, which solves the problem that the sound volume is not stable when the volume fluctuation range of the sound picked up by the microphone is large in the prior art.
  • the present invention provides a method of adjusting volume, comprising:
  • the volume of the received sound is adjusted according to the volume gain corresponding to the position of the sound source from which the sound is emitted, thereby avoiding the adjustment of the volume of the sound by the automatic gain control in the prior art.
  • the process enables the sound to directly adjust the volume of the received sound according to the volume gain corresponding to the position. After the sound is switched to another position, the volume of the sound is directly adjusted according to the volume gain corresponding to the other position, thereby avoiding the present
  • the microphone may easily cause the sound volume to be unstable.
  • the correspondence between the position and the volume gain is determined according to the following manner: when the sound is first determined to be from the position, determining the a distance between the sound source and the microphone; determining a volume gain corresponding to the distance according to a relationship between the preset distance and the volume gain; and using a volume gain corresponding to the distance as an initial volume corresponding to the position Gain, and save the correspondence between the position and the initial volume gain, the microphone being a microphone that picks up the sound of the sound source.
  • the volume gain corresponding to the position can be directly adjusted. Received sound The volume of the sound allows the volume to quickly reach the desired target value, avoiding the problem of slow adjustment of the volume of the sound by automatic gain control in the prior art.
  • the correspondence between the position and the volume gain is determined according to the following manner: when the sound is first determined to be from the position, The sound performs automatic gain control AGC to obtain an initial volume gain corresponding to the position; the correspondence between the position and the initial volume gain is saved.
  • the obtained initial volume gain is more accurate.
  • the correspondence from the position and the volume gain In the relationship, selecting a position closest to the position, using a volume gain corresponding to the selected position as a volume gain for adjusting the sound; and adjusting according to a volume gain corresponding to the selected position The volume of the sound.
  • the volume of the sound from the position is adjusted by the volume gain corresponding to the position closest to the position in the correspondence between the position and the volume gain when the position is not in the correspondence between the position and the volume gain, the volume is avoided.
  • the process of adjusting the volume of the sound by the automatic gain control improves the smoothness of the volume.
  • the location closest to the location includes at least two, the volume gain corresponding to any one of the closest locations is selected as the volume gain of the location. Or, the average value of the volume gains respectively corresponding to the positions closest to the positions is taken as the volume gain of the position.
  • the volume gain corresponding to the position in the correspondence between the position and the volume gain is replaced by the product of the volume gain corresponding to the position and the new volume gain.
  • volume gain corresponding to each position can be updated in combination with the volume of the actually received sound, the accuracy of the volume gain corresponding to each position is improved.
  • the present invention provides an apparatus for adjusting a volume, comprising:
  • a positioning unit configured to determine, according to the received sound, a location where the sound source that emits the sound is located
  • a processing unit configured to determine a volume gain corresponding to the position from a correspondence between the position and the volume gain; and adjust a volume of the sound according to a volume gain corresponding to the position.
  • the processing unit determines the correspondence between the position and the volume gain according to the following manner: the positioning unit first determines that the sound comes from Determining a distance between the sound source and the microphone; determining a volume gain corresponding to the distance according to a relationship between the preset distance and the volume gain; and adjusting a volume gain corresponding to the distance
  • the microphone is a microphone that picks up the sound of the sound source.
  • the processing unit determines the correspondence between the position and the volume gain according to the following manner: the positioning unit first determines that the sound comes from In the position, an automatic gain control AGC is performed on the sound to obtain an initial volume gain corresponding to the position; and a correspondence between the position and an initial volume gain is saved.
  • the processing unit is further configured to determine, at the positioning unit, that the sound is emitted After the position of the sound source of the sound is determined, if it is determined that the position is not in the correspondence between the position and the volume gain, from the corresponding relationship between the position and the volume gain, selecting a position closest to the position, A volume gain corresponding to the selected position is used as a volume gain for adjusting the sound; and a volume of the sound is adjusted according to a volume gain corresponding to the selected position.
  • the processing unit is further configured to perform AGC on the adjusted sound when the sound from the position is received again after adjusting the volume of the sound, to obtain A new volume gain; the volume gain corresponding to the position in the correspondence between the position and the volume gain is replaced by the product of the volume gain corresponding to the position and the new volume gain.
  • FIG. 1 is a schematic diagram of an application scenario according to an embodiment of the present invention.
  • FIG. 2 is a schematic flow chart of a method for adjusting volume according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a position of a sound source according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of volume adjustment according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of hardware of volume adjustment according to an embodiment of the present invention.
  • the execution body of the embodiment of the present invention may be a microphone or a terminal device connected to the microphone.
  • the application scenario of the embodiment of the present invention includes a microphone and a sound source, wherein only eight sound sources (sound source 1, sound source 2, and sound source 3 are shown in FIG. 1) In the case of the sound source 4, the sound source 5, the sound source 6, the sound source 7, and the sound source 8), in the embodiment of the present invention, the number of sound sources is not limited to eight.
  • a method for adjusting volume of an embodiment of the present invention includes:
  • Step 200 Determine, according to the received sound, a location where the sound source that issued the sound is located.
  • Step 201 Determine a volume gain corresponding to the position from the correspondence between the position and the volume gain.
  • Step 202 adjusting the volume of the sound according to the volume gain corresponding to the position.
  • the position may be an azimuth angle of the sound source relative to the microphone.
  • the microphone may be an array microphone, or other microphones that can be used for positioning.
  • the following is an example of an array microphone.
  • the array microphone can form a relatively strong beam, which can reduce the influence of noise and reverberation, improve the signal-to-noise ratio of the received signal, and the array microphone itself has the function of sound source localization, and can locate the sound source azimuth, wherein, distributed
  • the array microphone not only determines the azimuth of the sound source relative to the array microphone, but also the distance between the sound source and the array microphone.
  • the microphone is an array microphone, including a horizontal array microphone and a vertical array microphone, and the coordinate system x-axis and y-axis are established with the microphone as the origin, the sound source 7 is taken as an example, and the sound source 7 is opposite to the microphone.
  • the horizontal azimuth is ⁇
  • the vertical azimuth of the sound source 7 with respect to the microphone is ⁇ .
  • the microphone when the microphone is a horizontal microphone, its azimuth includes only the horizontal azimuth.
  • the microphone can be obtained by using an existing positioning algorithm such as GCC (Generalized Cross-Correlation), SRP_PHAT (Steered Response Power with Phase Transform), and the like.
  • GCC Generalized Cross-Correlation
  • SRP_PHAT Steered Response Power with Phase Transform
  • the correspondence between the position and the volume gain may be stored in the form of a table in the microphone.
  • the correspondence between the position and the volume gain may be as shown in Table 1:
  • Hn is used to indicate the horizontal azimuth of the nth sound source
  • Vn is used to indicate the vertical azimuth of the nth sound source
  • Gn is used to represent the volume gain of the nth sound source.
  • the number of sound sources in the conference room is relatively determined.
  • the volume gain is the initial volume gain
  • a certain position is determined in the embodiment of the present invention. The way the volume gain corresponds to the relationship:
  • the distance 1 between the sound source and the microphone is determined, and then the volume gain corresponding to the distance 1 is determined according to the relationship between the preset distance and the volume gain, and the volume corresponding to the distance 1 is The gain is used as the initial volume gain corresponding to position 1, and the correspondence between position 1 and initial volume gain is saved.
  • the microphone first determines the position of the sound source 1 as (H1, V1) and the distance d1 between the sound source 1 and the microphone after receiving the sound of the sound source 1 for the first time.
  • the relationship between the preset distance and the volume gain is that when the distance is d0 meters, the volume gain is set to G0, and the volume gain is increased by xdB for every 1 meter increase, wherein x can be set according to the actual situation, usually increasing according to the distance. For example, if the gain is increased by 6 dB, it is determined that when the distance is d1, the volume gain of the position (H1, V1) is G1, and the correspondence between the position (H1, V1) and the volume gain G1 is saved.
  • the distance between the microphone and the sound source can be obtained from other devices, for example, after the distance between the microphone and the sound source is measured by the terminal capable of ranging, the microphone acquires the distance from the terminal, or the microphone Directly measure the distance between the microphone and the sound source.
  • a terminal of two depth detecting cameras is provided.
  • the depth camera detects the distance of the sound source corresponding to the azimuth according to the azimuth of the sound source, wherein the microphone can be based on the distance, the microphone Sensitivity, as well as the level of the target signal, sets an initial volume gain.
  • the initial volume gain can be set to 20dB.
  • the relationship between the preset distance and the volume gain may also be: when the distance is D0, the volume will be The gain is set to G0, and the volume gain can be increased by a factor of x each time the distance is increased by 1 meter.
  • the automatic gain control AGC is performed on the sound to obtain an initial volume gain corresponding to position 1; and the correspondence between the position and the initial volume gain is saved.
  • the volume gain corresponding to the selected position is used as a volume gain for adjusting the sound; and the volume of the sound is adjusted according to the volume gain corresponding to the selected position.
  • the microphone stores the correspondence between the position of the sound source 1 and the sound source 8 and the volume gain.
  • the position of the sound source 9 is located between the sound source 1 and the sound source 2, and the sound is emitted.
  • the microphone receives the sound from the sound source 9, determines the position of the sound source 9, and determines that the position closest to the sound source 9 is the position of the sound source 2, and then adjusts according to the volume gain corresponding to the position of the sound source 2 The sound produced by the sound source 9.
  • the position of the sound source 1 is (60 degrees, 90 degrees), the position of the sound source 2 is (50 degrees, 80 degrees), and the position of the sound source 9 is (55 degrees, 86 degrees), due to the sound in the horizontal direction
  • the horizontal azimuth angle of the source 9 is the same as the absolute value of the difference between the horizontal azimuth angles of the sound source 1 and the sound source 2, respectively, and the difference between the vertical azimuth angle of the sound source 9 and the vertical azimuth angle of the sound source 2 in the vertical direction.
  • the absolute value is smaller than the absolute value of the difference between the vertical azimuth angle of the sound source 9 and the vertical azimuth angle of the sound source 1 in the vertical direction, and the position closest to the sound source 9 is determined to be the position of the sound source 2.
  • the volume gain serves as a volume gain for adjusting the sound emitted by the sound source 9.
  • the average of the volume gain corresponding to the position of the sound source 1 and the volume gain corresponding to the position of the sound source 2 is determined. This average value is used as a volume gain for adjusting the sound emitted by the sound source 9.
  • the microphone receives the sound from the position 1 after adjusting the volume of the sound, and performs AGC on the adjusted sound to obtain a new volume gain; and the position and volume The volume gain corresponding to position 1 in the correspondence of the gain is replaced by the product of the volume gain corresponding to position 1 and the new volume gain.
  • the array microphone locates the azimuth of the sound source relative to the array microphone after determining the sound of the sound source 7, including the horizontal azimuth angle ⁇ and the vertical azimuth angle ⁇ , the sound The sound emitted by the source 7 is AGC until the sound source 7 is switched to another sound source, and the volume gain Gain1 of each frame is obtained, and then Gain1 is further smoothed to obtain the volume gain AVGain1 of the sound source 7 and the AVGain1 is taken as An initial volume gain of the azimuth ( ⁇ , ⁇ ), wherein the initial volume gain is a magnification that adjusts the volume of the sound to a target value.
  • New_AVGain1 updates the initial volume gain of the sound source 7 to the product of New_AVGain1 and AVGGain1 when the sound is again switched from the sound source 7 to the other sound source.
  • the microphone of the embodiment of the present invention may also be integrated in the terminal.
  • the execution process is similar to the execution process of the microphone, wherein the terminal can be a note This computer, desktop and other electronic equipment.
  • the microphone can be directly transmitted to the terminal through the data communication interface, wherein the microphone can be an array microphone, and the shape of the array microphone can be circular or linear. Or other shapes, after receiving the data of the array microphone, the terminal performs beamforming to form a beam that is aligned with the sound source, and then sends the beamformed data to an automatic gain control module in the terminal for automatic gain control. The initial volume gain of the picked source.
  • the microphone after picking up the data of the sound emitted by the sound source, the microphone also sends the data to the sound source positioning module of the terminal for positioning, and obtains the azimuth of the sound source, and the azimuth may only include the horizontal orientation of the sound source relative to the array microphone.
  • the angle may also include the vertical azimuth of the sound source relative to the array microphone, or even the distance of the sound source relative to the array microphone, and the terminal preserves the relationship between the azimuth of the sound source and the volume gain.
  • the method for adjusting the volume of the terminal, determining the relationship between the position of the sound source and the initial volume gain, and the relationship between the position of the updated sound source and the volume gain are similar to those when the execution subject is a microphone, and details are not described herein.
  • the apparatus for adjusting the volume is further provided in the embodiment of the present invention. Since the method corresponding to the volume adjustment apparatus of the embodiment of the present invention is a volume adjustment method, the implementation of the apparatus of the embodiment of the present invention may refer to the implementation of the method. The repetitions are not repeated here.
  • the apparatus for adjusting the volume of the embodiment of the present invention includes:
  • a positioning unit 400 configured to determine, according to the received sound, a location where the sound source that emits the sound is located;
  • the processing unit 401 is configured to determine a volume gain corresponding to the position from the correspondence between the position and the volume gain, and adjust the volume of the sound according to the volume gain corresponding to the position.
  • the processing unit 401 determines the correspondence between the position and the volume gain according to the following manner:
  • the processing unit 401 determines the correspondence between the position and the volume gain according to the following manner:
  • the positioning unit 400 When the positioning unit 400 first determines that the sound is from the position, the sound is automatically gain-controlled AGC to obtain an initial volume gain corresponding to the position; and the correspondence between the position and the initial volume gain is saved.
  • the processing unit 401 is further configured to: after the positioning unit 400 determines the location of the sound source that emits the sound, if it is determined that the location is not in the correspondence between the location and the volume gain, select a corresponding relationship between the location and the volume gain. The position closest to the position, the volume gain corresponding to the selected position is used as the volume gain for adjusting the sound; and the volume of the sound is adjusted according to the volume gain corresponding to the selected position.
  • the processing unit 401 is further configured to: when the sound from the position is received again after adjusting the volume of the sound, perform AGC on the adjusted sound to obtain a new volume gain; and in a correspondence between the position and the volume gain The volume gain corresponding to the position is replaced by the product of the volume gain corresponding to the position and the new volume gain.
  • the processing unit 401 may be implemented by a processor, and the positioning unit 400 may be implemented by an array MIC (Microphone) or implemented in a conference terminal.
  • the processing unit 401 may be implemented by a processor, and the positioning unit 400 may be implemented by an array MIC (Microphone) or implemented in a conference terminal.
  • the volume adjustment device 500 can include a processor 510, a sound pickup 520, a locator 530, and a memory 540.
  • the memory 540 can be used for the program/code pre-installed when the device 500 is shipped from the factory, or can be stored. The code or the like for the execution of the processor 510.
  • bus system 550 which in addition to the data bus includes a power bus, a control bus, and a status signal bus.
  • the processor 510 can be a general-purpose central processing unit (CPU), a microprocessor, an application specific integrated circuit (ASIC), or one or more integrated circuits for performing related operations.
  • CPU central processing unit
  • ASIC application specific integrated circuit
  • the apparatus 500 shown in FIG. 5 only shows the processor 510, the sound pickup 520, the locator 530, and the memory 540, in a specific implementation process, those skilled in the art will appreciate that the apparatus also includes Other devices necessary for proper operation.
  • the device may also include hardware devices that implement other additional functions, depending on the particular needs.
  • the device may also only include the devices or modules necessary to implement the embodiments of the present invention, and do not necessarily include all of the devices shown in FIG.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).
  • the volume gain adjusts the volume of the sound.
  • the technical solution can adjust the volume of the received sound according to the received sound according to the volume gain corresponding to the position of the sound source from which the sound is emitted, thereby avoiding the volume of the sound by automatic gain control in the prior art.
  • the adjustment process enables the sound to directly adjust the volume of the received sound according to the volume gain corresponding to the position.
  • the volume of the sound is directly adjusted according to the volume gain corresponding to the other position, thereby avoiding the sound.
  • the microphone may easily cause the sound volume adjustment time to be too long, the volume to be unstable or even the distortion.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

本发明涉及声音处理技术领域，特别涉及一种音量调节的方法及装置，用以解决在麦克风拾取的声音的音量波动范围较大时，声音音量不平稳的问题。该方法包括：根据接收到的声音，确定发出该声音的声源所在的位置；从位置与音量增益的对应关系中，确定与该位置对应的音量增益；并根据与该位置对应的音量增益调节该声音的音量。这种技术方案由于能够按照发出该声音的声源所在的位置对应的音量增益，调节接收到的声音的音量，避免了现有技术中麦克风在拾取的声音的音量波动范围较大时，容易导致声音音量不平稳的问题。

Description

一种音量调节的方法及装置
本申请要求于2016年5月30日提交中国专利局、申请号为201610374624.9、发明名称为“一种音量调节的方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及声音处理技术领域，特别涉及一种音量调节的方法及装置。
背景技术
在会议当中，人们离麦克风的距离有远有近，导致麦克风拾取的声音音量大小差别比较大，现有技术中采用AGC(Automatic Gain Control，自动音量增益控制)来进行音量控制，增益的调节过程可能会比较长，音量不能及时调整到位。当音量小的时候，放大音量，当音量大的时候压缩音量。由于现有技术中，当音量大的声音后跟着音量小的声音时，由于对之后的音量小的声音进行放大需要一个过程，因此会导致音量小的声音被抑制，同理，当音量小的声音后面跟着音量大的声音时，会导致音量大的声音被放大，不能保证声音音量的平稳性，甚至失真。
发明内容
本发明提供一种音量调节的方法及装置，用以解决现有技术中在麦克风拾取的声音的音量波动范围较大时，声音音量不平稳的问题。
第一方面，本发明提供了一种调节音量的方法，包括：
根据接收到的声音，确定发出所述声音的声源所在的位置；然后，从位置与音量增益的对应关系中，确定与所述位置对应的音量增益；最后，根据与所述位置对应的音量增益，调节所述声音的音量。
由于本发明中能够根据接收到的声音，按照发出该声音的声源所在的位置对应的音量增益，调节接收到的声音的音量，避免了现有技术中通过自动增益控制对声音的音量进行调节的过程，使得声音能够直接按照与位置对应的音量增益调节接收到的声音的音量，在声音切换到另外一个位置后，则直接按照另一个位置对应的音量增益调节声音的音量，从而避免了现有技术中麦克风在拾取的声音的音量波动范围较大时，容易导致声音音量不平稳的问题。
在第一方面的基础上，可选的，当音量增益为初始音量增益时，根据下列方式确定所述位置与音量增益的对应关系：在首次确定所述声音来自所述位置时，确定所述声源与麦克风之间的距离；根据预设的距离与音量增益之间的关系，确定与所述距离对应的音量增益；将与所述距离对应的音量增益作为与所述位置对应的初始音量增益，并保存所述位置与初始音量增益的对应关系，该麦克风为拾取所述声源的声音的麦克风。
由于根据每个声源与麦克风之间的距离确定每个声源的位置的初始音量增益的，因此，在接收到来自任一位置的声音后，可直接按照与该位置对应的音量增益，调节接收到的声 音的音量，使得音量可以快速达到预期的目标值，避免了现有技术中通过自动增益控制对声音的音量进行调节过慢的问题。
在第一方面的基础上，可选的，当音量增益为初始音量增益时，根据下列方式确定所述位置与音量增益的对应关系：在首次确定所述声音来自所述位置时，对所述声音进行自动增益控制AGC，得到与所述位置对应的初始音量增益；保存所述位置与初始音量增益的对应关系。
由于在在首次接收到声音后，是通过对接收到的声音进行自动增益控制得到的初始音量增益，从而使得得到的初始音量增益较为准确。
在第一方面的基础上，可选的，在确定发出所述声音的声源所在的位置之后，若确定所述位置不在位置与音量增益的对应关系中，从所述位置与音量增益的对应关系中，选择一个与所述位置最相近的位置，将与所述选择的位置对应的音量增益作为用于调节所述声音的音量增益；并根据与所述选择的位置对应的音量增益，调节所述声音的音量。
由于当在确定位置不在位置与音量增益的对应关系中时，通过从位置与音量增益的对应关系中，按照与该位置最接近的位置对应的音量增益，调节来自该位置的声音的音量，避免了通过自动增益控制对声音的音量进行调节的过程，提高了音量的平稳性。
在第一方面的基础上，可选的，若与所述位置最接近的位置包括至少两个，则从所述最接近的位置中选择任一个位置对应的音量增益作为所述位置的音量增益；或者，将与所述位置最接近的位置分别对应的音量增益的平均值作为所述位置的音量增益。
在第一方面的基础上，可选的，在调节所述声音的音量之后，再次接收到来自所述位置的声音时，对所述调节后的声音进行AGC，得到新的音量增益；并将位置与音量增益的对应关系中的与所述位置对应的音量增益，替换为与所述位置对应的音量增益与所述新的音量增益的乘积。
由于能够对每个位置对应的音量增益，结合实际接收到的声音的音量，进行更新，从而提高了每个位置对应的音量增益的准确性。
第二方面，本发明提供了一种调节音量的装置，包括：
定位单元，用于根据接收到的声音，确定发出所述声音的声源所在的位置；
处理单元，用于从位置与音量增益的对应关系中，确定与所述位置对应的音量增益；并根据与所述位置对应的音量增益，调节所述声音的音量。
在第二方面的基础上，可选的，当音量增益为初始音量增益时，所述处理单元根据下列方式确定所述位置与音量增益的对应关系：在所述定位单元首次确定所述声音来自所述位置时，确定所述声源与麦克风之间的距离；根据预设的距离与音量增益之间的关系，确定与所述距离对应的音量增益；并将与所述距离对应的音量增益作为与所述位置对应的初始音量增益，并保存所述位置与初始音量增益的对应关系，所述麦克风为拾取所述声源的声音的麦克风。
在第二方面的基础上，可选的，当音量增益为初始音量增益时，所述处理单元根据下列方式确定所述位置与音量增益的对应关系：在所述定位单元首次确定所述声音来自所述位置时，对所述声音进行自动增益控制AGC，得到与所述位置对应的初始音量增益；并保存所述位置与初始音量增益的对应关系。
在第二方面的基础上，可选的，所述处理单元还用于在所述定位单元确定发出所述声 音的声源所在的位置之后，若确定所述位置不在位置与音量增益的对应关系中，从所述位置与音量增益的对应关系中，选择一个与所述位置最相近的位置，将与所述选择的位置对应的音量增益作为用于调节所述声音的音量增益；根据与所述选择的位置对应的音量增益，调节所述声音的音量。
在第二方面的基础上，可选的，所述处理单元还用于在调节所述声音的音量之后，再次接收到来自所述位置的声音时，对所述调节后的声音进行AGC，得到新的音量增益；将位置与音量增益的对应关系中的与所述位置对应的音量增益，替换为与所述位置对应的音量增益与所述新的音量增益的乘积。
附图说明
图1为本发明实施例应用场景示意图；
图2为本发明实施例音量调节的方法的流程示意图；
图3为本发明实施例声源位置示意图；
图4为本发明实施例音量调节的结构示意图；
图5为本发明实施例音量调节的硬件结构示意图。
具体实施方式
为了使本发明的目的、技术方案和优点更加清楚，下面将结合附图对本申请作进一步地详细描述。
应理解，本发明实施例的执行主体可以为麦克风，也可以为与麦克风连接的终端设备。
当执行主体为麦克风时，如图1所示，本发明实施例应用场景包括麦克风和声源，其中图1中仅示出了包括8个声源(声源1、声源2、声源3、声源4、声源5、声源6、声源7、声源8)的情况，在本发明实施例中，声源的个数不限于8个。
如图2所示，本发明实施例音量调节的方法，包括：
步骤200，根据接收到的声音，确定发出该声音的声源所在的位置。
步骤201，从位置与音量增益的对应关系中，确定与该位置对应的音量增益。
步骤202，根据与该位置对应的音量增益调节该声音的音量。
需要说明的是，在本发明实施例中位置可以为声源相对于麦克风的方位角。
在本发明实施例中麦克风可以为阵列麦克风，或其它能够用于定位的麦克风，下面以阵列麦克风为例进行具体说明。
阵列麦克风能够形成比较强的波束，可以减少噪声、混响的影响，提升接收信号的信噪比，同时阵列麦克风本身具备声源定位的功能，可以定位出声源方位角，其中，分布式的阵列麦克风不但能够确定声源相对于阵列麦克风的方位角，甚至声源与阵列麦克风之间的距离。
如图3所示，当麦克风为阵列麦克风，包括水平阵列麦克风和垂直阵列麦克风，以麦克风为原点建立坐标系x轴和y轴，则以声源7为例，则声源7相对于麦克风的水平方位角为α，声源7相对于麦克风的垂直方位角为β。
其中，麦克风为水平麦克风时，其方位角仅包括水平方位角。
在本发明实施例中，麦克风可以采用现有的定位算法如GCC(Generalized Cross-Correlation，广义互相关方法)、SRP_PHAT(Steered Response Power with Phase Transform，最大可控响应功率波束形成法)等算法得到声源的方位角。
具体的，位置与音量增益的对应关系可以以表格的形式存储在麦克风中，如当位置为声源方位时，其位置与音量增益的对应关系可以如表1所示：
表1
声源方位 音量增益
(H0，V0) G0
(H1，V1) G1
(H2，V2) G2
… …
(Hn，Vn) Gn
在表1中，Hn用于表示第n个声源的水平方位角，Vn用于表示第n个声源的垂直方位角，Gn用于表示第n个声源的音量增益。
通常情况下，会议室中声源的个数是比较确定的，当还未存储位置与音量增益的对应关系时，即当音量增益为初始音量增益时，本发明实施例中一种确定位置与音量增益对应关系的方式：
在首次确定声音来自位置1时，确定声源与麦克风之间的距离1，然后根据预设的距离与音量增益之间的关系，确定与距离1对应的音量增益，将与距离1对应的音量增益作为位置1对应的初始音量增益，保存位置1与初始音量增益的对应关系。
以图1中的声源1为例进行说明，假设麦克风首次接收到声源1发出的声音后，确定声源1的位置为(H1，V1)，以及声源1与麦克风之间的距离d1，其中预设的距离与音量增益的关系为当距离为d0米时，音量增益设置为G0，距离每增加1米音量增益提高xdB，其中，x可以根据实际情况进行设置，通常按照距离每增加一个，增益提高6dB的关系来确定，则确定当距离为d1时，位置(H1，V1)的音量增益为G1，并保存位置(H1，V1)与音量增益G1的对应关系。
具体的，麦克风与声源之间的距离可以从其他设备中获取，例如采用能够进行测距的终端在测量得到麦克风与声源之间的距离后，麦克风从终端中获取该距离，或者，麦克风直接测量麦克风与声源之间的距离。
例如，设置两个深度检测的摄像机的终端，当声源发出声音时，深度摄像机根据声源的方位角，检测与该方位角对应的声源的距离，其中，麦克风可以基于该距离、麦克风的灵敏度，以及目标信号的电平来设置一个初始音量增益。其中假设正常说话人的声音是65dB SPL，麦克风的灵敏度是-34dBv/94dBSPL 1m,硬件设计是94dBSPL输出0dBFS，假设目标信号的电平是-20dBFs，当某一声源发出声音时，如果通过深度检测发现声源离麦克风4m，则到麦克的声压为53dBSPL，对应的是-41dBFS，离目标尚有21dB的差距，因此，可以将初始音量增益设置为20dB。
需要说明的是，预设的距离与音量增益之间的关系还可以为：当距离为D0时，将音量 增益设置为G0，每当距离增加1米，可以将音量增益增加x倍。
可选的，本发明实施例中另一种确定位置与音量增益对应关系的方式：
在首次确定声音来自位置1时，对声音进行自动增益控制AGC，得到与位置1对应的初始音量增益；并保存所述位置与初始音量增益的对应关系。
当已保存有位置与音量增益的对应关系时，当在确定发出声音的位置后，若确定该位置不在位置与音量增益的对应关系中，从位置与音量增益的对应关系中，选择一个与该位置最相近的位置，将与选择的位置对应的音量增益作为用于调节该声音的音量增益；并根据与所述选择的位置对应的音量增益，调节声音的音量。
以图1为例进行具体说明，麦克风保存了声源1到声源8的位置与音量增益的对应关系，当声源9的位置位于在声源1和声源2之间，并发出声音时，麦克风接收到来自声源9的声音后，确定声源9的位置，并确定与声源9最相近的位置为声源2的位置，则将按照声源2的位置对应的音量增益，调节声源9发出的声音。
其中，若声源1的位置为(60度，90度)，声源2的位置为(50度，80度)，声源9的位置为(55度，86度)，由于水平方向上声源9的水平方位角分别与声源1和声源2的水平方位角的差值的绝对值相同，在垂直方向上声源9的垂直方位角与声源2的垂直方位角的差值的绝对值小于垂直方向上声源9的垂直方位角与声源1的垂直方位角的差值的绝对值，则确定与声源9最接近的位置为声源2的位置。
当与声源9的位置最接近的位置为声源1的位置和声源2的位置时，则从声源1的位置和声源2的位置中任选一个位置，将选择的位置对应的音量增益作为用于调节声源9发出的声音的音量增益。
此外，当与声源9的位置最接近的位置为声源1的位置和声源2的位置时，确定声源1的位置对应的音量增益和声源2的位置对应的音量增益的平均值，将该平均值作为用于调节声源9发出的声音的音量增益。
此外，为使得音量增益能够保证音量的平稳性，麦克风在调节声音的音量之后，再次接收到来自位置1的声音时，对调节后的声音进行AGC，得到新的音量增益；并将位置与音量增益的对应关系中的与位置1对应的音量增益，替换为与位置1对应的音量增益与新的音量增益的乘积。
具体的，当声源7第一次发出声音时，阵列麦克风在确定声源7发出声音后，定位出声源相对于阵列麦克风的方位角，包括水平方位角α和垂直方位角β，对声源7发出的声音进行AGC，直至声源7切换到其他声源发生为止，得到每一帧的音量增益Gain1，然后对Gain1进一步平滑处理，得到声源7平均的音量增益AVGain1，将AVGain1作为来自方位角(α，β)的初始音量增益，其中，该初始音量增益为对声音音量调整到目标值的放大倍数。
当前由其他声源再次切换到声源7时，保存其他声源音量增益的同时，将声源7发出的声音的音量直接放大AVGain1，然后在此基础上再次进行AGC，得到一个新的平均增益New_AVGain1，在由声源7又切换到其他声源发出声音时，将声源7的初始音量增益更新为New_AVGain1与AVGGain1的乘积。
此外，本发明实施例的麦克风还可以集成在终端中。
当执行主体为终端时，其执行过程与麦克风的执行过程类似，其中，终端可以为笔记 本电脑、台式机等电子设备。
具体的，麦克风的在首次拾取到声源发出的声音的数据后，可以通过数据通讯接口直接传送到终端，其中，麦克风可以为阵列麦克风，阵列麦克风的形状可以使圆形的，也可以是线形的或者其他形状，终端在接收到阵列麦克风的数据后，进行波束成型，形成对准声源的波束，然后将波束成型后的数据发送到终端中的自动增益控制模块，进行自动增益控制，得到拾取到的声源的初始音量增益。
此外，麦克风在拾取到声源发出的声音的数据后，还将该数据发送到终端的声源定位模块进行定位，得到声源的方位角，方位角可能只包含声源相对于阵列麦克风水平方位角，也可能包含声源相对于阵列麦克风垂直方位角，甚至声源相对于阵列麦克风的距离，终端保存声源的方位角与音量增益之间的关系。
其中，由于终端调节音量的方法、确定声源的位置与初始音量增益的关系、以及更新声源的位置与音量增益的关系与执行主体为麦克风时类似，在此不再赘述。
基于同一发明构思，本发明实施例中还提供了音量调节的装置，由于本发明实施例音量调节的装置对应的方法为音量调节的方法，因此本发明实施例装置的实施可以参见方法的实施，重复之处不再赘述。
如图4所示，本发明实施例音量调节的装置，包括：
定位单元400，用于根据接收到的声音，确定发出声音的声源所在的位置；
处理单元401，用于从位置与音量增益的对应关系中，确定与位置对应的音量增益；并根据与位置对应的音量增益，调节声音的音量。
可选的，当音量增益为初始音量增益时，处理单元401根据下列方式确定位置与音量增益的对应关系：
在定位单元400首次确定声音来自位置时，确定声源与麦克风之间的距离；根据预设的距离与音量增益之间的关系，确定与距离对应的音量增益；并将与距离对应的音量增益作为与位置对应的初始音量增益，并保存位置与初始音量增益的对应关系。
可选的，当音量增益为初始音量增益时，处理单元401根据下列方式确定位置与音量增益的对应关系：
在定位单元400首次确定声音来自位置时，对声音进行自动增益控制AGC，得到与位置对应的初始音量增益；并保存位置与初始音量增益的对应关系。
可选的，处理单元401还用于在定位单元400确定发出声音的声源所在的位置之后，若确定位置不在位置与音量增益的对应关系中，从位置与音量增益的对应关系中，选择一个与位置最相近的位置，将与选择的位置对应的音量增益作为用于调节声音的音量增益；根据与选择的位置对应的音量增益，调节声音的音量。
可选的，处理单元401还用于在调节声音的音量之后，再次接收到来自位置的声音时，对调节后的声音进行AGC，得到新的音量增益；将位置与音量增益的对应关系中的与位置对应的音量增益，替换为与位置对应的音量增益与新的音量增益的乘积。
应注意，本发明实施例中，处理单元401可以由处理器实现，定位单元400可以由阵列MIC(Microphone，麦克风)来实现，或者在会议终端中实现。
如图5所示，音量调节的装置500可以包括处理器510、声音拾取器520、定位器530和存储器540。其中，存储器540可以用于装置500出厂时预装的程序/代码，也可以存储 用于处理器510执行时的代码等。
装置500中的各个组件通过总线系统550耦合在一起，其中总线系统550除包括数据总线之外，还包括电源总线、控制总线和状态信号总线。
其中，处理器510可以采用通用的中央处理器(Central Processing Unit，CPU)，微处理器，应用专用集成电路(Application Specific Integrated Circuit，ASIC)，或者一个或多个集成电路，用于执行相关操作，以实现本发明实施例所提供的技术方案。
应注意，尽管图5所示的装置500仅仅示出了处理器510、声音拾取器520、定位器530和存储器540，但是在具体实现过程中，本领域的技术人员应当明白，该设备还包含实现正常运行所必须的其他器件。同时，根据具体需要，本领域的技术人员应当明白，该设备还可包含实现其他附加功能的硬件器件。此外，本领域的技术人员应当明白，该设备也可仅仅包含实现本发明实施例所必须的器件或模块，而不必包含图5中所示的全部器件。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程，是可以通过计算机程序来指令相关的硬件来完成，上述的程序可存储于一计算机可读取存储介质中，该程序在执行时，可包括如上述各方法的实施例的流程。其中，上述的存储介质可为磁盘、光盘、只读存储记忆体(ROM：Read-Only Memory)或随机存储记忆体(RAM：Random Access Memory)等。
从上述内容可以看出：根据接收到的声音，确定发出该声音的声源所在的位置；从位置与音量增益的对应关系中，确定与该位置对应的音量增益；并根据与该位置对应的音量增益调节该声音的音量。这种技术方案由于能够根据接收到的声音，按照发出该声音的声源所在的位置对应的音量增益，调节接收到的声音的音量，避免了现有技术中通过自动增益控制对声音的音量进行调节的过程，使得声音能够直接按照与位置对应的音量增益调节接收到的声音的音量，在声音切换到另外一个位置后，则直接按照另一个位置对应的音量增益调节声音的音量，从而避免了现有技术中麦克风在拾取的声音的音量波动范围较大时，容易导致声音音量调整时间过长，音量不平稳甚至失真的问题。
本领域内的技术人员应明白，本发明的实施例可提供为方法、系统、或计算机程序产品。因此，本发明可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本发明是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
尽管已描述了本发明的优选实施例，但本领域内的技术人员一旦得知了基本创造性概念，则可对这些实施例作出另外的变更和修改。所以，所附权利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。
显然，本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样，倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。

Claims (10)

  1. 一种调节音量的方法，其特征在于，包括：
    根据接收到的声音，确定发出所述声音的声源所在的位置；
    从位置与音量增益的对应关系中，确定与所述位置对应的音量增益；
    根据与所述位置对应的音量增益，调节所述声音的音量。
  2. 如权利要求1所述的方法，其特征在于，当音量增益为初始音量增益时，根据下列方式确定所述位置与音量增益的对应关系：
    在首次确定所述声音来自所述位置时，确定所述声源与麦克风之间的距离，所述麦克风为拾取所述声源的声音的麦克风；
    根据预设的距离与音量增益之间的关系，确定与所述距离对应的音量增益；
    将与所述距离对应的音量增益作为与所述位置对应的初始音量增益，并保存所述位置与初始音量增益的对应关系。
  3. 如权利要求1所述的方法，其特征在于，当音量增益为初始音量增益时，根据下列方式确定所述位置与音量增益的对应关系：
    在首次确定所述声音来自所述位置时，对所述声音进行自动增益控制AGC，得到与所述位置对应的初始音量增益；
    保存所述位置与初始音量增益的对应关系。
  4. 如权利要求1所述的方法，其特征在于，在确定发出所述声音的声源所在的位置之后，还包括：
    若确定所述位置不在位置与音量增益的对应关系中，从所述位置与音量增益的对应关系中，选择一个与所述位置最相近的位置，将与所述选择的位置对应的音量增益作为用于调节所述声音的音量增益；
    根据与所述选择的位置对应的音量增益，调节所述声音的音量。
  5. 如权利要求1至4任一所述的方法，其特征在于，在调节所述声音的音量之后，还包括：
    再次接收到来自所述位置的声音时，对所述调节后的声音进行AGC，得到新的音量增益；
    将位置与音量增益的对应关系中的与所述位置对应的音量增益，替换为与所述位置对应的音量增益与所述新的音量增益的乘积。
  6. 一种调节音量的装置，其特征在于，包括：
    定位单元，用于根据接收到的声音，确定发出所述声音的声源所在的位置；
    处理单元，用于从位置与音量增益的对应关系中，确定与所述位置对应的音量增益；并根据与所述位置对应的音量增益，调节所述声音的音量。
  7. 如权利要求6所述的装置，其特征在于，当音量增益为初始音量增益时，所述处理单元根据下列方式确定所述位置与音量增益的对应关系：
    在所述定位单元首次确定所述声音来自所述位置时，确定所述声源与麦克风之间的距离；根据预设的距离与音量增益之间的关系，确定与所述距离对应的音量增益；并将与所述距离对应的音量增益作为与所述位置对应的初始音量增益，并保存所述位置与初始音量增益的对应关系，所述麦克风为拾取所述声源的声音的麦克风。
  8. 如权利要求6所述的装置，其特征在于，当音量增益为初始音量增益时，所述处理单 元根据下列方式确定所述位置与音量增益的对应关系：
    在所述定位单元首次确定所述声音来自所述位置时，对所述声音进行自动增益控制AGC，得到与所述位置对应的初始音量增益；并保存所述位置与初始音量增益的对应关系。
  9. 如权利要求6所述的装置，其特征在于，所述处理单元，还用于：
    在所述定位单元确定发出所述声音的声源所在的位置之后，若确定所述位置不在位置与音量增益的对应关系中，从所述位置与音量增益的对应关系中，选择一个与所述位置最相近的位置，将与所述选择的位置对应的音量增益作为用于调节所述声音的音量增益；根据与所述选择的位置对应的音量增益，调节所述声音的音量。
  10. 如权利要求6至9任一所述的装置，其特征在于，所述处理单元，还用于：
    在调节所述声音的音量之后，再次接收到来自所述位置的声音时，对所述调节后的声音进行AGC，得到新的音量增益；将位置与音量增益的对应关系中的与所述位置对应的音量增益，替换为与所述位置对应的音量增益与所述新的音量增益的乘积。
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