WO2010012186A1 - 一种扬声器阵列设备及其驱动方法 - Google Patents
一种扬声器阵列设备及其驱动方法 Download PDFInfo
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- WO2010012186A1 WO2010012186A1 PCT/CN2009/072580 CN2009072580W WO2010012186A1 WO 2010012186 A1 WO2010012186 A1 WO 2010012186A1 CN 2009072580 W CN2009072580 W CN 2009072580W WO 2010012186 A1 WO2010012186 A1 WO 2010012186A1
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Classifications
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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
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
- H04R1/403—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers loud-speakers
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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
- H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
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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
- H04R2203/00—Details of circuits for transducers, loudspeakers or microphones covered by H04R3/00 but not provided for in any of its subgroups
- H04R2203/12—Beamforming aspects for stereophonic sound reproduction with loudspeaker arrays
Definitions
- the present invention relates to the field of electronic technologies, and in particular, to a speaker array device and a driving method thereof.
- speaker array technology is widely used in the field of sound reproduction. This technology has many applications. Typical two applications are: Reproduce the sound source orientation and sound focus.
- Wave Field Synthesis uses the principle of Huyghen (sonic synthesis technology) for sonic synthesis.
- the basic principle of the Huyghen principle is: An original wave source emits sound waves in a spherical manner from the original source to the spherical surface. The propagation time of each point is the same. This spherical surface is called Wave Front. All the points on the wavefront can be regarded as a new wave source. These wave sources have the same rate and wavelength as the original wave source. After the superposition, these wave sources form a new wavefront at the next instant. This new wavefront and the original wave source produce the same wavefront, so for the listener, the new wavefront is formed by hearing. The illusion generated by the original source, thus forming a virtual source with the same location as the original source.
- Sound focus means that the sound of each speaker is concentrated to the position of the listener while playing, while other positions are inaudible.
- the inventors have found in the course of carrying out the invention that the existing speaker array can only reproduce the sound source orientation or only the sound focus, since the sound focusing and reproducing the sound source orientation are reversed.
- the speaker array device and the driving method of the embodiments of the present invention are capable of reproducing the sound source orientation and focusing the sound.
- An embodiment of the present invention provides a speaker array device, including: a delay module, a gain module, and a parameter calculation module, where the parameter calculation module includes a control module, configured to determine, according to the received user control information, a delay parameter that needs to be calculated. a type and a gain parameter type, and outputting a determination result;
- the parameter type includes: a first delay parameter and a first gain parameter; Or a second delay parameter and a second gain parameter; or, a first delay parameter, a first gain parameter, a second delay parameter, and a second gain parameter; the first delay parameter and the first gain parameter are used to implement reproduction a function of sound source orientation, the second delay parameter and the second gain parameter are used to implement a sound focusing function;
- a calculation execution module configured to calculate a delay parameter and a gain parameter according to the determination result of the output of the control module, and output the same;
- the delay module is configured to process the audio signal according to the received delay parameter
- the gain module is configured to process the audio signal according to the received gain parameter and output the audio signal.
- An embodiment of the present invention provides a method for driving a speaker array device, where the method includes:
- the parameter type includes: a first delay parameter and a first gain parameter; or, a second delay parameter and a second gain parameter; or, a delay parameter, a first gain parameter, a second delay parameter, and a second gain parameter; the first delay parameter and the first gain parameter are used to implement a function of reproducing a sound source orientation, the second delay parameter and the second The gain parameter is used to implement the sound focusing function;
- the delay parameter and the gain parameter are calculated according to the determined delay parameter and the gain parameter type, and the audio signal is processed and output according to the calculated delay parameter and the gain parameter.
- the parameter calculation module uses the parameter calculation module to calculate the delay parameter and the gain parameter according to the received user control information; the delay module and the gain module according to the received delay parameter and
- the technical solution of processing the audio signal by the gain parameter achieves the technical effect that the speaker device can reproduce the sound source orientation and can focus the sound, and is simple to implement, convenient for the user to operate, and low in cost.
- FIG. 1 is a structural diagram of an apparatus according to an embodiment of the present invention.
- FIG. 2 is a schematic diagram of calculating a delay parameter when implementing a sound source azimuth reproduction function according to an embodiment of the present invention
- FIG. 3 is a schematic diagram of calculating a delay parameter when implementing a sound focus function according to an embodiment of the present invention
- Figure 5 is a structural diagram of a device according to another embodiment of the present invention.
- Figure 6 is a flow chart of a method of one embodiment of the present invention.
- FIG. 7 is a flow chart of a method in accordance with yet another embodiment of the present invention.
- the embodiment of the invention satisfies the requirement that the user needs to be able to reproduce the sound source orientation and focus on the sound. For example, when watching TV, it is usually desirable to reproduce the sound source orientation, that is, the sound emitting direction and the television screen.
- the position of the midrange source is the same. For example, if the left person is speaking in the TV screen, the sound is emitted from the left side, and the right side person is speaking on the TV screen, then the sound is emitted from the right side; but in the dead of night, it is also necessary to not affect other people's rest. Therefore, it is required at this time that the speaker array can have a sound focusing function.
- An embodiment of the present invention provides a speaker array device.
- the method includes: a delay module, a gain module, and a parameter calculation module.
- the delay module and the gain module calculate the delay parameter and the gain parameter according to the parameter calculation module.
- the signal is processed and the processing result is output.
- the parameter calculation module includes:
- a control module configured to determine, according to the received user control information, a delay parameter and a gain parameter type that need to be calculated, and output the determination result.
- the implementation of the reproduction sound source orientation and the sound focus requires different delay parameters and gain parameters, and the parameter type may include: a first delay parameter and a first gain parameter; or, a second delay parameter and a second gain parameter; or, a delay parameter, a first gain parameter, a second delay parameter, and a second gain parameter, the first delay parameter and the first gain parameter being used to implement a function of reproducing a sound source orientation, the second delay parameter and the second gain parameter Used to implement the sound focusing function of the speaker.
- the user control information generally refers to information that the user presets or inputs to control whether the speaker array device currently implements the sound source azimuth reproduction function or the sound focus function.
- the calculation execution module is configured to calculate a delay parameter and a gain parameter according to an output result of the control module, and output the same.
- the orientation reproduction module in the calculation execution module may be based on the information of the received control module, according to the preset speaker position information, and the advance Setting or receiving the audio signal position information, calculating the first delay parameter and the first gain parameter, and outputting the calculation result;
- the calculation may be performed by the calculation a sound focusing module in the execution module, configured to calculate a second delay parameter and a second gain according to the received information of the control module, according to the preset speaker position information, and the preset or received focus position information.
- the speaker position information can be preset in advance when the device is shipped from the factory, for example, if it is a line type speaker array, the distance between the speakers, the number of speakers, and the like.
- the audio signal orientation information is typically provided externally to the speaker array device along with the audio signal.
- focus position information there is usually a default focus position information when the device leaves the factory. For example, for a line speaker array, the default focus position is directly in front of the middle of the speaker array, and after the device is shipped, the user can be based on his actual location.
- the position adjusts the focus position, for example, if the user is sitting on the left front of the speaker array, the focus position can be adjusted to the left front.
- the delay module and the gain module process the audio signal according to the received delay parameter and the gain parameter, and output the processing result.
- the delay module and the gain module can output the processing result to the speaker through the amplifier.
- the calculation execution module calculates the first delay parameter and the first gain parameter
- the delay module and the gain module process the audio signal according to the received first delay parameter and the first gain parameter
- the delay module and the gain module process the audio signal according to the received second delay parameter and the second gain parameter.
- the delay module and the gain module can be integrated in one module or as two modules, so that the connection order of the delay module and the gain module is not required.
- the gain module in the embodiment of the present invention may be a filter, and the corresponding function is realized by modifying the frequency spectrum of the audio signal.
- the delay module and the gain module calculate the filter parameters.
- the speaker array described in FIG. 1 may be a stand-alone device or may be integrated with other devices, for example, may be integrated with a digital television set-top box, and the modules shown in FIG. 1 may be in numbers.
- the TV set-top box is implemented internally, and each speaker can be connected to the set-top box as a peripheral.
- Figure 2 shows a schematic diagram of calculating the delay parameters when implementing the sound source azimuth reproduction function.
- the virtual source is required to be farthest from the speaker on the right, and the distance from the speaker shown in the dotted line to the virtual source is the same as that on the right, that is, on the same sphere.
- the Huyghen principle when the right speaker emits a sound, the sound from the other speakers shown by the solid line should reach the position of the corresponding dotted line, that is, at the moment when the right speaker makes a sound, the sound of all the speakers forms a wave.
- the front, the wavefront of the wavefront and the virtual sound source are similar, so the user will feel the sound appearing from the virtual sound source, thus recreating the sound orientation.
- the third speaker from the left in Figure 2 is closest to the virtual sound source and does not require delay.
- the second and fourth speakers need to be delayed for a certain time, while the right speaker has the longest delay time.
- Lmin be the shortest distance between the speaker and the virtual sound source. Li is the distance of the i-th speaker from the virtual sound source, then the delay time of the i-th speaker is:
- FIG. 3 shows a schematic diagram of calculating the delay parameters when implementing the sound focus function.
- the sound from the speaker should reach the focus-centered sphere at the same time. It can be seen that since the virtual sound source is behind the speaker and the focus is in front of the speaker, the spherical surface is formed. It is convex and one is concave, the opposite is true. In the figure, the focus is closest to the speaker on the left. At the moment when the left speaker emits a sound, the sound of all the speakers should reach the position of the speaker shown by the corresponding dotted line, that is, on the same spherical surface.
- the far right speaker in the figure is farthest from the focus, no delay is required, and the left speaker has the longest delay time.
- Lmax be the longest distance from the speaker to the focus
- Li is the distance from the ith speaker to the focus
- the gain parameter of each speaker should be proportional to the square of the distance from the speaker to the focus.
- Embodiments of the present invention enable azimuth reproduction of a single source, or a single source of sound focusing on one or more locations. Embodiments of the present invention may also achieve azimuth reproduction of a plurality of sound sources, or form a plurality of sound focus positions. The following examples describe these two cases in detail.
- FIG. 4 A block diagram of still another embodiment of the present invention is shown in Fig. 4, and includes: each module in the previous embodiment of the present invention. As can be seen from Figure 4, a single audio signal is processed by each delay module and gain block and output to each speaker via each amplifier.
- the azimuth reproduction module in the calculation execution module calculates the delay parameters and the gain parameters of the respective speakers, and outputs them to the corresponding speakers respectively.
- the delay parameter 1 and the gain parameter 1 for the speaker 1 are calculated from the position information of the speaker 1 and the position information of the audio signal, and output to the delay module 1 and the gain module 1 connected to the speaker 1;
- the delay parameter n and the gain parameter n for the speaker n are calculated from the position information of the speaker n and the audio signal orientation information, and output to the delay module n and the gain block n connected to the speaker n.
- the respective delay parameters and gain parameters can also be separately calculated by an azimuth reproduction module, and then output to a delay module and a gain module corresponding to each speaker, so that according to the principle of FIG. 2, the sound emitted by each speaker will be formed.
- a virtual sound source when the user listens to the sound from the speaker array, it feels that the sound is coming from the virtual sound source.
- the sound focus module in the calculation execution module calculates the delay parameters and gain parameters of the respective speakers, and outputs them to their corresponding speakers.
- the delay parameter 1 and the gain parameter 1 for the speaker 1 are calculated from the position information and the focus position information of the speaker 1, and output to the delay module 1 and the gain module 1 connected to the speaker 1;
- the delay parameter n and the gain parameter n for the speaker n are calculated from the position information and the focus position information of the speaker n, and output to the delay module n and the gain block n connected to the speaker n.
- the respective delay parameters and gain parameters can be separately calculated by a sound focusing module, and then output to the delay module and the gain module corresponding to the respective speakers, so that according to the principle of FIG. 3, the sounds emitted by the respective speakers will focus on us. Pre-set position.
- Embodiments of the present invention enable azimuth reproduction of a single source, or a single source of sound focusing on one or more locations.
- FIG. 5 shows a speaker array device of an embodiment of the present invention in the case of a plurality of audio signals.
- a delay module and a gain module corresponding to the added audio signal are set, for example, for the added first audio signal, That is, audio signal 2, a set of delay modules and a set of gain modules are added.
- a set of combined modules has been added before the module is amplified.
- each audio signal is input to a corresponding delay module, and after being delayed by the delay module, it is input to a corresponding gain module for processing, for example, the audio signal 2 is input to the delay module (2, 1), and the delay module (2, 2), ...
- the delay module (2, m) after being delayed by each delay module, is separately input to the gain module (2, 1), the gain module (2, 2), ..., the gain module (2, m) Process it.
- the amplification module is amplified, and then input to the corresponding speaker for playback, for example, for the speaker 1, the gain module (1, 1), the gain module (2, 1) , ... , the gain module ( ⁇ , ⁇ ) is input to the first combination module, and a signal is combined, and the combined signal is amplified by the amplification module and input to the speaker 1.
- a simple implementation of the combo module is to add the individual signals input to the module.
- the control module in the parameter calculation module can perform orientation reproduction of multiple sound sources according to the control information of the user, and can also perform multiple sound focusing, and can also perform orientation reproduction and sound focusing at the same time.
- the control module determines that the orientation of the plurality of sound sources is reproduced, invokes the orientation reproduction module in the calculation execution module according to the orientation information corresponding to each audio signal included in the audio signal orientation information and the position information of each speaker.
- the delay and gain parameters of each audio signal are separately calculated and transmitted to the delay module and the gain module. For example, if there are audio signal 1 and audio signal 2, and there are m speakers, the control module calls the azimuth reproduction module to calculate m delay parameters and m gain parameters according to the orientation information of the audio signal 1 and the position information of each speaker.
- the same control module according to the orientation information of the audio signal 2 and the position information of each speaker, call the azimuth reproduction module to calculate the delay parameter T(2, l), ⁇ (2, 2), ..., T (2,m), and the gain parameters G(2,l), G(2,2), ..., G(2,m). After calculating the parameters, the control module transmits the respective delay and gain parameters respectively.
- the delay and gain module that is, ⁇ (1,1) is passed to the delay module (1,1), G(l,l) is passed to the gain module (1,1); T(l,2) is passed to the delay module ( 1,2), G(l,2) is passed to the gain module (1,2); ,,,,T (2, mM to the delay module (2,m), G (2, mM to the gain module ( 2,m).
- the control module determines to perform the plurality of sound focusing
- the control module calls the sound focusing module in the calculation execution module to calculate the delay corresponding to each focus according to the plurality of focus position information included in the focus position information and the position information of each speaker.
- gain parameters are transmitted to the delay module and the gain block.
- the control module calls the sound focus module to calculate m delay parameters and m gain parameters according to the position information of the focus position 1 and the position information of each speaker. They are identified as T, (l, l), T, (l, 2), ..., T, (l, m), and G, (l, l), G, (l, 2), ..
- the same control module calls the sound focus module to calculate the delay parameter T according to the position information of the focus position 2 and the position information of each speaker, (2, l), ⁇ '(2, 2) , ..., T, (2, m), and gain parameters G, (2, l), G'(2, 2), ..., G, (2, m), after calculating the parameters, control
- the module passes each delay and gain parameter to the corresponding delay and gain module, that is, ⁇ '( ⁇ , ⁇ is sent to the delay module (1, 1), G, (l, l) to the gain module (U); , 2) passed to the delay module (1, 2), G, (l, 2) is passed to the gain module (1, 2); ,,,, (2, mM to the delay module (2, m), G' (2, mM to the gain module (2, m).
- Embodiments of the present invention may achieve azimuth reproduction of a plurality of sound sources or form a plurality of sound focus positions.
- Embodiments of the present invention propose a scheme for performing both azimuth reproduction and sound focusing.
- the stereo includes two left and right channels.
- the first in the speaker array can be used.
- the speaker at the predetermined position generates a left channel signal, such as: generating a left channel signal with the speaker array of the left half; generating a right channel signal with a speaker of the second predetermined position in the speaker array, for example: using the speaker array of the right half
- the right channel signal is formed, and the generated left and right channel signals are focused to the same position.
- the specific position of the speaker at the first predetermined position and the speaker at the second predetermined position may be set according to the specific needs of the direction of the reproduced sound source.
- the parameter calculation module calculates the delay parameter and the gain parameter corresponding to the left half speaker according to the focus position information and the position information of the left half speaker (from 1 to m/2), “(l,l), T"(l,2), ..., T"(l,m/2), G,,(l,l), G"(l,2), ..., G"(l,m/2) ;
- the parameter calculation module calculates the corresponding right half speaker based on the focus position information and the position information of the right half speaker (from m/2+ l to m) Delay parameters and gain parameters, T"(2, m/2+1), T"(2, m/2+2), T"(2,m), G"(2, m/2+1) , G"(2, m/2+2), ..., G"(2,m).
- the parameter calculation module After calculating the parameters, the parameter calculation module passes the respective delay and gain parameters to the corresponding delay and gain modules, respectively.
- T" (UM to the delay module ( ⁇ , , G" (UM to the gain module (1,1); T" (l, m/2) is passed to the delay module (l, m / 2), G" ( l, m/2) passed to the gain module
- the delay parameter and the gain parameter of each audio signal may be separately calculated by a plurality of parameter calculation modules; the delay parameter and the gain parameter of all the audio signals may also be calculated by one parameter calculation module, thereby achieving a cost saving effect.
- An embodiment of the present invention provides a method for driving a speaker array.
- the method includes the following steps: Step 1: Determine, according to the received user control information, a delay parameter and a gain parameter type that need to be calculated;
- the type includes: a first delay parameter and a first gain parameter; or, a second delay parameter and a second gain parameter; or, a first delay parameter, a first gain parameter, a second delay parameter, and a second gain parameter,
- a delay parameter and a first gain parameter are used to implement a function of reproducing a sound source orientation, and the second delay parameter and the second gain parameter are used to implement a sound focusing function of the speaker; specifically, the control module in the speaker array device Determine the delay parameters and gain parameter types that need to be calculated.
- Step 2 Calculate the delay parameter and the gain parameter according to the determined delay parameter and the gain parameter type to be calculated; the delay parameter and the gain parameter may be calculated by the calculation execution module.
- Step 3 processing the audio signal according to the calculated delay parameter and the gain parameter, and outputting the processing result; the audio signal may be processed by the delay module and the gain module.
- step 2 The first delay parameter and the first gain parameter may be calculated by the azimuth reproduction module in the calculation execution module according to the preset speaker position information and the preset or received audio signal orientation information.
- step 2 the sound focus module in the calculation execution module may be preset or received according to preset speaker position information. The focus position information is obtained, and the second delay parameter and the second gain parameter are calculated.
- the processing result outputted in step 3 may be further enlarged, and the processed information may be output to the corresponding speaker, and specifically, the amplification module may perform amplification processing.
- Embodiments of the present invention enable azimuth reproduction of a single sound source, or a single sound source that focuses on one or more positions of the sound focusing function, is simple to implement, is user-friendly, and low in cost. In the case where it is desired to realize the azimuth reproduction of a plurality of sound sources, or to form a plurality of sound focus positions, it is only necessary to perform the operations described in the embodiments of the present invention for each of the sound sources.
- a further embodiment of the present invention provides a method for performing sound focusing.
- the flowchart shown in FIG. 7 includes: Step 1: According to the received user control information, determining that the delay parameter and the gain parameter type to be calculated are the second delay parameter and The second gain parameter; specifically, the parameter type can be determined by a control module in the speaker array device.
- Step 2 Calculate the second delay parameter and the second gain parameter according to the determination result of the second delay parameter and the second gain parameter, and calculate the second delay parameter and the second gain parameter by the calculation execution module.
- Step 3 processing the audio signal according to the calculated second delay parameter and the second gain parameter, and outputting the processing result, where the audio signal may be processed by the delay module and the gain module.
- the speaker at the first predetermined position in the speaker array is caused to generate a left channel signal
- the speaker at the second predetermined position in the speaker array generates a right channel signal, and causes the generated left and right channel signals to be focused to the same position.
- the speaker that generates the first predetermined position of the left channel signal may be the speaker array of the left half, that is, for the viewer, the speaker of the left half of the speaker array, the second of which generates the right channel signal
- the speaker at the predetermined position may be the speaker array on the right half, that is, the speaker on the right side of the speaker array for the viewer.
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Description
一种扬声器阵列设备及其驱动方法 本申请要求于 2008年 7月 28日提交中国专利局、 申请号为 200810117294.0、发明 名称为 "一种扬声器阵列设备及其驱动方法"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
本发明涉及电子技术领域, 尤其涉及一种扬声器阵列设备及其驱动方法。
发明背景
目前, 扬声器阵列技术被广泛的应用于声音重现领域, 该技术有多种应用, 典型 的两种应用是: 重现声源方位和声音聚焦。
重现声源方位是指在播放时, 重现出原始声源的空间信息 (包括水平角度、 垂直 角度、距离等), 一般可用声场合成技术来实现。 声场合成(Wave Field Synthesis)是利 用 Huyghen (—种声波合成技术) 原理进行声波合成的, Huyghen原理的基本原理是: 一个原始的波源以球面的方式向四周发射声波,从原始波源到球面上的各个点的传播时 间是相同的, 这个球面称为波阵面(Wave Front), 波阵面上所有的点均可以看作一个新 的波源, 这些波源和原始的波源有同样的速率和波长, 在叠加之后这些波源在下一个瞬 间形成新的波阵面, 这个新的波阵面和原始波源产生的波阵面是相同的, 因此对于听众 来说, 听觉上会形成这个新的波阵面是由原始波源产生的错觉, 这样就形成和原始波源 位置相同的虚拟波源。
声音聚焦是指在播放时, 将各个扬声器的声音汇聚到听众所在的位置, 而其他位 置听不见。
发明人在实现本发明过程中发现, 由于声音聚焦和重现声源方位的处理方法相反, 因此现有的扬声器阵列, 要么仅能重现声源方位, 要么仅能实现声音聚焦。
发明内容
本发明实施例的扬声器阵列设备及驱动方法既能够重现声源方位又能够对声音进 行聚焦。
本发明实施例是通过以下技术方案实现的:
本发明实施例提供一种扬声器阵列设备, 包括: 延迟模块、 增益模块和参数计算 模块, 所述参数计算模块包括- 控制模块, 用于根据接收到的用户控制信息, 确定需要计算的延迟参数的类型和 增益参数类型, 并输出确定结果; 所述参数类型包括: 第一延迟参数和第一增益参数;
或者, 第二延迟参数和第二增益参数; 或者, 第一延迟参数、 第一增益参数、 第二延迟 参数和第二增益参数; 所述第一延迟参数和第一增益参数用于实现重现声源方位的功 能, 所述第二延迟参数和第二增益参数用于实现声音聚焦功能;
计算执行模块, 用于根据控制模块的输出的确定结果, 计算延迟参数和增益参数, 并输出;
所述延迟模块, 用于根据接收到的延迟参数, 对音频信号进行处理后输出; 所述增益模块, 用于根据接收到的增益参数, 对音频信号进行处理后输出。
本发明实施例提供一种扬声器阵列设备的驱动方法, 所述方法包括:
根据接收到的用户控制信息, 确定需要计算的延迟参数和增益参数类型; 所述参 数类型包括: 第一延迟参数和第一增益参数; 或者, 第二延迟参数和第二增益参数; 或 者, 第一延迟参数、 第一增益参数、 第二延迟参数和第二增益参数; 所述第一延迟参数 和第一增益参数用于实现重现声源方位的功能,所述第二延迟参数和第二增益参数用于 实现声音聚焦功能;
根据确定的需要计算的延迟参数和增益参数类型, 计算延迟参数和增益参数; 根据计算得到的延迟参数和增益参数, 对音频信号进行处理后输出。
由上述本发明实施例提供的技术方案可以看出, 本发明实施例采用参数计算模块 根据接收到的用户控制信息计算延迟参数和增益参数;延迟模块和增益模块根据接收到 的所述延迟参数和增益参数对音频信号进行处理的技术方案,达到扬声器设备既能够重 现声源方位又能够对声音进行聚焦的技术效果, 实现简单, 便于用户的操作, 并且成本 低。 附图简要说明
图 1为本发明的一个实施例的设备的结构图;
图 2为本发明实施例的实现声源方位重现功能时, 计算延迟参数的一个示意图; 图 3为本发明实施例的实现声音聚焦功能时, 计算延迟参数的一个示意图; 图 4为本发明的又一个实施例的设备的结构图;
图 5为本发明的另一个实施例的设备的结构图;
图 6为本发明的一个实施例的方法的流程图;
图 7为本发明的又一实施例的方法的流程图。
实施本发明的方式
本发明实施例满足了用户既需要能够重现声源方位, 又能够对声音进行聚焦的需 求, 例如, 在看电视时, 通常情况下希望重现声源方位, 即声音发出的方向和电视画面 中音源的位置相一致, 例如电视屏幕中左边人在讲话, 则声音从左边发出, 电视屏幕中 右边人在讲话, 则声音从右边发出; 但是在夜深人静时, 也需要不影响其他人的休息, 因此这时需要扬声器阵列能够具有声音聚焦功能。
本发明的一个实施例提供一种扬声器阵列设备, 如图 1所示, 包括: 延迟模块、 增 益模块和参数计算模块,延迟模块和增益模块根据参数计算模块计算得到的延迟参数和 增益参数对音频信号进行处理,并将处理结果输出,为了实现重现声源方位和声音聚焦, 该参数计算模块包括:
控制模块, 用于根据接收到的用户控制信息, 确定需要计算的延迟参数和增益参 数类型, 并输出确定结果。实现重现声源方位和声音聚焦需要不同的延迟参数和增益参 数, 则该参数类型可以包括: 第一延迟参数和第一增益参数; 或者, 第二延迟参数和第 二增益参数; 或者, 第一延迟参数、 第一增益参数、 第二延迟参数和第二增益参数, 该 第一延迟参数和第一增益参数用于实现重现声源方位的功能,该第二延迟参数和第二增 益参数用于实现扬声器的声音聚焦功能。用户控制信息一般是指用户预先设置的或输入 的控制扬声器阵列设备当前实现声源方位重现功能还是实现声音聚焦功能的信息。
计算执行模块, 用于根据控制模块的输出结果, 计算延迟参数和增益参数, 并输 出。在控制模块确定需要计算第一延迟参数、 第一增益参数的情况下, 可以由计算执行 模块中的方位重现模块根据接收到的控制模块输出的信息,根据预先设置的扬声器位置 信息, 以及预先设置的或者接收到的音频信号方位信息, 计算出第一延迟参数和第一增 益参数, 并输出计算结果; 在控制模块确定需要计算第二延迟参数、第二增益参数的情 况下,可以由计算执行模块中的声音聚焦模块,用于根据接收到的控制模块输出的信息, 根据预先设置的扬声器位置信息, 以及预先设置的或者接收到的聚焦位置信息, 计算出 第二延迟参数和第二增益参数, 并输出计算结果。扬声器位置信息可以在设备出厂时就 预先设置好, 例如如果是线型扬声器阵列, 则包括扬声器之间距离、扬声器数目等。 音 频信号方位信息一般是和音频信号一起由外部提供给扬声器阵列设备的。对于聚焦位置 信息, 在设备出厂时一般有一个默认的聚焦位置信息, 例如对于线型扬声器阵列, 默认 的聚焦位置在扬声器阵列的中间正前方, 并且在设备出厂后, 用户可以根据自己实际所 在的位置对聚焦位置进行调整, 例如如果用户坐在扬声器阵列的左前方, 则可以将聚焦 位置调整到左前方。
该延迟模块和增益模块根据接收到的延迟参数和增益参数, 对音频信号进行处理, 并输出处理结果。 该延迟模块和增益模块可以将处理结果经过放大器输出给扬声器。 在 计算执行模块计算第一延迟参数、 第一增益参数的情况下, 该延迟模块和增益模块根据 接收到的第一延迟参数、 第一增益参数对音频信号进行处理; 在计算执行模块计算第二 延迟参数、第二增益参数的情况下,该延迟模块和增益模块根据接收到的第二延迟参数、 第二增益参数对音频信号进行处理。 该延迟模块和增益模块可以集成在一个模块中, 也 可以作为两个模块, 这样, 对延迟模块和增益模块的连接顺序不作要求。 本发明实施例 中的增益模块可以是一个滤波器, 通过修改音频信号的频谱实现相应的功能。 这样, 延 迟模块和增益模块计算的是滤波器参数。
需要说明的是图 1所述的扬声器阵列可以是一个独立的设备, 也可以和其他设备集 成在一起, 例如, 可以和数字电视机顶盒集成在一起, 此时图 1所示的各个模块可以在 数字电视机顶盒内部实现, 而各个扬声器可以作为外设连接到机顶盒。
图 2显示了实现声源方位重现功能时, 计算延迟参数的一个示意图。 图 2中需要虚 拟的声源距离右边的扬声器最远,而虚线所示的扬声器到虚拟声源的距离和右边的扬声 器相同, 即在同一个球面上。 根据 Huyghen原理, 当右边的扬声器发出声音时, 其他实 线所示的扬声器发出的声音应到达对应的虚线所示的扬声器的位置, 即在右边扬声器发 出声音的时刻, 所有扬声器的声音形成一个波阵面, 该波阵面和虚拟声源的位置发出的 波阵面是相似的,因此用户会感觉到声音好像从虚拟声源处发出,从而重现了声音方位。 根据前面的说明可知, 图 2中左数第三个扬声器距离虚拟声源最近, 不需要延迟, 第二 和第四个扬声器需要延迟一定时间,而右边的扬声器延迟时间最长。令 Lmin为扬声器距 离虚拟声源最短的距离, Li是第 i个扬声器距离虚拟声源的距离, 则第 i个扬声器的延迟 时间为:
T = (L - L . ) /c
1 1 mm J 式中 c是声速。
声音在空气中传播时, 其衰减速度近似和传播距离的平方成反比, 因此实现声源 方位重现功能时,各扬声器增益参数应和扬声器到虚拟声源距离的平方成反比, 令 为 第 i个扬声器的增益, 贝 u:
G
式中 G为一固定值
图 3显示了实现声音聚焦功能时,计算延迟参数的一个示意图。要实现声音的聚焦, 扬声器发出的声音应在某一个时刻同时到达以焦点为中心的球面上, 可以看出, 由于虚 拟声源在扬声器的后面, 而焦点在扬声器的前面, 因此形成的球面一个是凸的, 一个是 凹的,二者相反。图中需要焦点距离左边的扬声器最近,在左边扬声器发出声音的时刻, 所有扬声器的声音应到达相应的虚线所示的扬声器的位置, 即在同一球面上。 图中最右 扬声器距离焦点最远, 不需要延迟, 而左边的扬声器延迟时间最长。 令 Lmax为扬声器 距离焦点最长的距离, Li是第 i个扬声器距离焦点的距离, 则第 i个扬声器的延迟时间为: τ. = (L -L )/c
1 max l ) 式中 c是声速。
实现声音聚焦功能时, 各扬声器放出来的声音在到达焦点时应当能量相同, 因此 各扬声器增益参数应和扬声器到焦点距离的平方成正比, 令 为第 i个扬声器的增益, 则: l 1 式中 G为一固定值
本发明实施例能够实现单个音源的方位重现, 或者单个音源聚焦于一个或多个位 置的声音聚焦功能。本发明实施例还可以实现多个音源的方位重现, 或者形成多个声音 聚焦位置。 下面实施例分别对这两种情况进行详细叙述。
本发明的又一个实施例的结构图如图 4所示, 包括: 本发明前一个实施例中的各个 模块。 由图 4可以看出, 单个音频信号经过各个延迟模块和增益模块的处理, 并经各个 放大器输出给各个扬声器。
在控制模块接收到的用户控制信息为实现单个音源的方位重现的情况下, 计算执 行模块中的方位重现模块计算得到各个扬声器的延迟参数和增益参数,并分别输出给其 对应的扬声器。 比如: 对扬声器 1, 由该扬声器 1的位置信息和音频信号方位信息, 计算 得到针对扬声器 1的延迟参数 1和增益参数 1, 并输出给与扬声器 1相连的延迟模块 1和增 益模块 1 ; 同样的, 对扬声器 n, 由该扬声器 n的位置信息和音频信号方位信息, 计算得 到针对扬声器 n的延迟参数 n和增益参数 n, 并输出给与扬声器 n相连的延迟模块 n和增益 模块 n。 该各个延迟参数和增益参数也可以由一个方位重现模块分别计算出来, 然后输 出给与各个扬声器对应的延迟模块和增益模块, 这样, 根据图 2的原理可知, 各个扬声 器发出来的声音将形成一个虚拟声源,用户去听扬声器阵列发出来的声音时会感觉到声 音从虚拟声源发出。
在控制模块接收到的用户控制信息为实现单个音源聚焦于一个位置的情况下, 计 算执行模块中的声音聚焦模块计算得到各个扬声器的延迟参数和增益参数,并分别输出 给其对应的扬声器。 比如: 对扬声器 1, 由该扬声器 1的位置信息和聚焦位置信息, 计算 得到针对扬声器 1的延迟参数 1和增益参数 1, 并输出给与扬声器 1相连的延迟模块 1和增 益模块 1 ; 同样的, 对扬声器 n, 由该扬声器 n的位置信息和聚焦位置信息, 计算得到针 对扬声器 n的延迟参数 n和增益参数 n, 并输出给与扬声器 n相连的延迟模块 n和增益模块 n。 该各个延迟参数和增益参数可以由一个声音聚焦模块分别计算出来, 然后输出给与 各个扬声器对应的延迟模块和增益模块, 这样, 根据图 3的原理可知, 各个扬声器发出 来的声音将聚焦于我们预先设定的位置。
本发明实施例能够实现单个音源的方位重现, 或者单个音源聚焦于一个或多个位 置的声音聚焦功能。
本发明的另一个实施例的结构图如图 5所示, 图 5示出了在多个音频信号情况下的 本发明实施例的扬声器阵列设备。
如图 5所示, 有多个音频信号, 所述多个音频信号可以相同也可以不同, 设置了与 增加的音频信号对应的延迟模块和增益模块, 比如: 针对增加的第一个音频信号, 即音 频信号 2, 增加了一组延迟模块和一组增益模块。 此外, 在放大模块之前, 增加了一组 组合模块。
如图 5所示, 有 n个音频信号、 m个扬声器, 则共有 nX m个延迟模块, 以及 nX m个 增益模块, 对各个延迟模块和增益模块进行标识: 延迟模块 (g) ,增益模块 (i,j) , i = 1,2, ... , η,相应于各个音频信号, j = 1, 2, m,相应于各个扬声器。各个音频信号输入 到与之相应的延迟模块, 经延迟模块延迟之后, 再输入到相应的增益模块进行处理, 例 如音频信号 2输入到延迟模块 (2,1), 延迟模块 (2,2), ... , 延迟模块 (2,m), 经各个延迟模 块延迟之后, 再分别输入到增益模块 (2,1), 增益模块 (2,2), ... , 增益模块 (2,m)进行处 理。从增益模块出来的信号经组合模块进行组合之后, 再有放大模块进行放大, 然后输 入到相应的扬声器进行播放, 例如对于扬声器 1, 从增益模块 (1,1), 增益模块 (2,1), ... , 增益模块 (η,Ι)输入到第一个组合模块, 组合成一个信号, 组合后的信号再经放大模块放 大后, 输入到扬声器 1。 组合模块的一种简单的实现方式是将输入到该模块的各个信号 进行相加。
参数计算模块中的控制模块根据用户的控制信息, 可以进行多个声源的方位重现, 也可以进行多个声音聚焦, 此外也可以同时进行方位重现和声音聚焦。
在控制模块判断进行多个音源的方位重现时, 控制模块根据音频信号方位信息中 包含的和各个音频信号对应的方位信息, 以及各个扬声器的位置信息, 调用计算执行模 块中的方位重现模块分别计算各个音频信号的延迟和增益参数,并传输给延迟模块和增 益模块。 例如, 如果有音频信号 1和音频信号 2, 扬声器为 m个, 则控制模块根据音频信 号 1的方位信息以及各个扬声器的位置信息,调用方位重现模块计算出 m个延迟参数和 m 个增益参数, 分别标识为 T(l,l), T(l,2), ..., T(l,m), 和 G(l, l), G(l,2), ..., G(l,m); 同样控制模块根据音频信号 2的方位信息以及各个扬声器的位置信息, 调用方位重现模 块计算出延迟参数 T(2,l), Τ(2,2), ..., T(2,m), 和增益参数 G(2,l), G(2,2), ..., G(2,m), 计算出参数后, 控制模块将各个延迟和增益参数分别传递对应的延迟和增益模块, 即将 Τ(1,1)传递给延迟模块 (1,1), G(l,l)传递给增益模块 (1,1); T(l,2)传递给延迟模块 (1,2), G(l,2)传递给增益模块 (1,2); ,,,, T(2,mM专递给延迟模块 (2,m), G(2,mM专递给增益模块 (2,m) 。
在控制模块判断进行多个声音聚焦时, 控制模块根据聚焦位置信息中包含的多个 焦点位置信息, 以及各个扬声器的位置信息, 调用计算执行模块中的声音聚焦模块分别 计算和各个焦点对应的延迟和增益参数, 并传输给延迟模块和增益模块。 例如, 如果有 焦点位置 1和焦点位置 2,扬声器为 m个,则控制模块根据焦点位置 1的位置信息以及各个 扬声器的位置信息, 调用声音聚焦模块计算出 m个延迟参数和 m个增益参数, 分别标识 为 T,(l,l), T,(l,2), ..., T,(l,m), 和 G,(l,l), G,(l,2), ..., G,(l,m); 同样控制模块根据 焦点位置 2的位置信息以及各个扬声器的位置信息, 调用声音聚焦模块计算出延迟参数 T,(2,l), Τ'(2,2), ..., T,(2,m), 和增益参数 G,(2,l), G'(2,2), ..., G,(2,m), 计算出参数 后, 控制模块将各个延迟和增益参数分别传递对应的延迟和增益模块, 即将 τ'(ι,ιΜ专递 给延迟模块 (1,1), G,(l,l)传递给增益模块 (U); (l,2)传递给延迟模块 (1,2), G,(l,2)传 递给增益模块 (1,2); ,,,, (2,mM专递给延迟模块 (2,m), G'(2,mM专递给增益模块 (2,m) 。
本发明实施例可以实现多个音源的方位重现, 或者形成多个声音聚焦位置。
方位重现和声音聚焦原理上刚好相反, 如果要同时进行方位重现和声音聚焦, 则 可以做一定程度上的近似。 本发明实施例提出一种同时进行方位重现和声音聚焦的方 案。 比如, 针对立体声双声道的音源, 立体声包含左右两个声道, 为了实现只能在某个 位置听见左右声道的声音, 而同时实现方位重现的目的, 可以用扬声器阵列中的第一预 定位置的扬声器生成左声道信号, 比如: 用左半边的扬声器阵列生成左声道信号; 用扬 声器阵列中的第二预定位置的扬声器生成右声道信号, 比如: 用右半边的扬声器阵列生
成右声道信号, 并且使得生成的左、 右声道信号聚焦到相同的位置。 该第一预定位置的 扬声器和第二预定位置的扬声器的具体位置可以根据重现声源方位的具体需要进行设 置。 下面具体说明: 针对左声道信号, 参数计算模块根据聚焦位置信息, 以及左半部扬 声器 (从 1至 m/2)的位置信息,计算相应于左半部扬声器的延迟参数和增益参数, T"(l,l), T"(l,2), ..., T"(l,m/2), G,,(l,l), G"(l,2), ..., G"(l,m/2); 针对右声道信号, 参数计 算模块根据聚焦位置信息, 以及右半部扬声器 (从 m/2+ l至 m) 的位置信息, 计算相应 于右半部扬声器的延迟参数和增益参数, T"(2, m/2+1), T"(2, m/2+2), T"(2,m), G"(2, m/2+1), G"(2, m/2+2), ..., G"(2,m)。 计算出参数后, 参数计算模块将各个延迟和增益 参数分别传递给对应的延迟和增益模块, 即将 T"(UM专递给延迟模块 (ι, , G"(UM专递 给增益模块 (1,1) ; T"(l,m/2)传递给延迟模块 (l,m/2), G"(l,m/2)传递给增益模块
(l,m/2) ; T"(2, m/2+l)传递给延迟模块 (2, m/2+1) , G"(2, m/2+l)传递给增益模块 (2, m/2+l); ...; T"(2,m)传递给延迟模块 (2,m), G"(2,m)传递给增益模块 (2,m) 。 并且将音 频信号传递给各个延迟模块时,左声道信号只传递给延迟模块 (1,1),延迟模块 (1,2), ... , 延迟模块 (l,m/2), 右声道信号只传递给延迟模块 (2, m/2+l), 延迟模块 (2, m/2+2), ... , 延迟模块 (2,m)。 这样, 本发明实施例同时实现了方位重现和声音聚焦功能。
在本发明实施例中, 可以由多个参数计算模块分别计算各个音频信号的延迟参数 和增益参数; 也可以由一个参数计算模块计算所有音频信号的延迟参数和增益参数, 达 到节省成本的效果。
本发明的一个实施例提供一种扬声器阵列的驱动方法,如图 6所示,包括如下步骤: 步骤 1 : 根据接收到的用户控制信息, 确定需要计算的延迟参数和增益参数类型; 所述参数类型包括: 第一延迟参数和第一增益参数; 或者, 第二延迟参数和第二增益参 数; 或者, 第一延迟参数、 第一增益参数、 第二延迟参数和第二增益参数, 所述第一延 迟参数和第一增益参数用于实现重现声源方位的功能,所述第二延迟参数和第二增益参 数用于实现扬声器的声音聚焦功能; 具体可以由扬声器阵列设备中的控制模块来确定需 要计算的延迟参数和增益参数类型。
步骤 2: 根据确定的需要计算的延迟参数和增益参数类型, 计算延迟参数和增益参 数; 具体可以由计算执行模块计算延迟参数和增益参数。
步骤 3 : 根据计算得到的延迟参数和增益参数, 对音频信号进行处理, 并输出处理 结果; 具体可以由延迟模块和增益模块对音频信号进行处理。
若步骤 1中的确定结果为需要计算第一延迟参数和第一增益参数, 则在步骤 2中,
可以由计算执行模块中的方位重现模块根据预先设置的扬声器位置信息, 以及预先设置 的或者接收到的音频信号方位信息, 计算出第一延迟参数和第一增益参数。
若步骤 1中的确定结果为需要计算第二延迟参数和第二增益参数, 则在步骤 2中, 可以由计算执行模块中的声音聚焦模块根据预先设置的扬声器位置信息, 以及预先设置 的或者接收到的聚焦位置信息, 计算出第二延迟参数和第二增益参数。
在本发明实施例中, 还可以将步骤 3输出的处理结果进行放大处理, 并输出处理后 的信息给对应的扬声器, 具体可以由放大模块进行放大处理。
本发明实施例能够实现单个音源的方位重现, 或者单个音源聚焦于一个或多个位 置的声音聚焦功能, 实现简单, 便于用户的操作, 并且成本低。 在需要实现多个音源的 方位重现, 或者形成多个声音聚焦位置的情况下, 仅需要对每个音源执行本发明实施例 所述的操作。
本发明又一实施例提供进行声音聚焦的方法, 流程图如图 7所示, 包括: 步骤 1 : 根据接收到的用户控制信息, 确定需要计算的延迟参数和增益参数类型为 第二延迟参数和第二增益参数; 具体可以由扬声器阵列设备中的控制模块确定参数类 型。
步骤 2: 根据需要计算第二延迟参数和第二增益参数的确定结果, 计算第二延迟参 数和第二增益参数, 具体可以由计算执行模块计算第二延迟参数和第二增益参数。
步骤 3 : 根据计算得到的第二延迟参数和第二增益参数, 对音频信号进行处理, 并 输出处理结果, 具体可以由延迟模块和增益模块对音频信号进行处理。 使得扬声器阵列 中的第一预定位置的扬声器生成左声道信号,扬声器阵列中的第二预定位置的扬声器生 成右声道信号, 并且使得生成的左、 右声道信号聚焦到相同的位置。 比如: 该生成左声 道信号的第一预定位置的扬声器可以为左半边的扬声器阵列, 即对观众来说, 为扬声器 阵列的左边二分之一的扬声器,该生成右声道信号的第二预定位置的扬声器可以为右半 边的扬声器阵列, 即对观众来说, 为扬声器阵列的右边二分之一的扬声器。 这样, 本发 明实施例同时实现了方位重现和声音聚焦功能, 实现简单, 便于用户的操作, 并且成本 低。
以上所述, 仅为本发明较佳的具体实施方式, 但本发明的保护范围并不局限于此, 任何熟悉本技术领域的技术人员在本发明揭露的技术范围内, 可轻易想到的变化或替 换, 都应涵盖在本发明的保护范围之内。 因此, 本发明的保护范围应该以权利要求书的 保护范围为准。
Claims
1、一种扬声器阵列设备, 其特征在于, 包括: 延迟模块、 增益模块和参数计算模 块;
所述参数计算模块包括:
控制模块, 用于根据接收到的用户控制信息, 确定需要计算的延迟参数的类型和 增益参数类型, 并输出确定结果; 所述参数类型包括: 第一延迟参数和第一增益参数; 或者, 第二延迟参数和第二增益参数; 或者, 第一延迟参数、 第一增益参数、 第二延迟 参数和第二增益参数; 所述第一延迟参数和第一增益参数用于实现重现声源方位的功 能, 所述第二延迟参数和第二增益参数用于实现声音聚焦功能;
计算执行模块, 用于根据控制模块的输出的确定结果, 计算延迟参数和增益参数, 并输出;
所述延迟模块, 用于根据接收到的延迟参数, 对音频信号进行处理后输出; 所述增益模块, 用于根据接收到的增益参数, 对音频信号进行处理后输出。
2、 如权利要求 1所述的设备, 其特征在于, 所述计算执行模块包括下列模块中至 少一个:
方位重现模块, 用于根据接收到的控制模块输出的确定结果, 根据预先设置的扬 声器位置信息, 以及预先设置的或者接收到的音频信号方位信息, 计算第一延迟参数和 第一增益参数, 并输出计算结果;
声音聚焦模块, 用于根据接收到的控制模块输出的确定结果, 根据预先设置的扬 声器位置信息, 以及预先设置的或者接收到的聚焦位置信息, 计算第二延迟参数和第二 增益参数, 并输出计算结果。
3、 如权利要求 1或 2所述的设备, 其特征在于, 所述设备还包括:
放大模块, 用于将所述延迟模块和所述增益模块输出的所述处理结果进行放大处 理后输出。
4、 一种扬声器阵列设备的驱动方法, 其特征在于, 所述方法包括:
根据接收到的用户控制信息, 确定需要计算的延迟参数和增益参数类型; 其中, 所述参数类型包括: 第一延迟参数和第一增益参数; 或者, 第二延迟参数和第二增益参 数; 或者, 第一延迟参数、 第一增益参数、 第二延迟参数和第二增益参数; 所述第一延 迟参数和第一增益参数用于实现重现声源方位的功能,所述第二延迟参数和第二增益参 数用于实现声音聚焦功能;
根据确定的需要计算的延迟参数和增益参数类型, 计算延迟参数和增益参数; 根据计算得到的延迟参数和增益参数, 对音频信号进行处理后输出。
5、 如权利要求 4所述的方法, 其特征在于, 所述计算延迟参数和增益参数的方法 具体包括:
根据预先设置的扬声器位置信息, 以及预先设置的或者接收到的音频信号方位信 息, 计算第一延迟参数和第一增益参数; 和 /或,
根据预先设置的扬声器位置信息, 以及预先设置的或者接收到的聚焦位置信息, 计算第二延迟参数和第二增益参数。
6、 如权利要求 4或 5所述的方法, 其特征在于, 所述方法还包括:
将根据接收到的延迟参数和增益参数, 对音频信号进行处理后输出的信息, 进行 放大处理, 并输出处理后的信息。
7、 如权利要求 4所述的方法, 其特征在于, 所述需要计算的延迟参数和增益参数 类型为第二延迟参数和第二增益参数;
计算得到的延迟参数和增益参数分别为第二延迟参数和第二增益参数; 所述根据计算得到的延迟参数和增益参数, 对音频信号进行处理包括: 根据所述 第二延迟参数和第二增益参数, 对音频信号进行处理, 使得扬声器阵列中的第一预定位 置的扬声器生成左声道信号, 扬声器阵列中的第二预定位置的扬声器生成右声道信号, 并且使得生成的左、 右声道信号聚焦到相同的位置。
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US10158958B2 (en) | 2010-03-23 | 2018-12-18 | Dolby Laboratories Licensing Corporation | Techniques for localized perceptual audio |
CN102823273B (zh) * | 2010-03-23 | 2015-12-16 | 杜比实验室特许公司 | 用于局域化感知音频的技术 |
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