WO2013107307A1 - Noise reduction method and device - Google Patents
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- WO2013107307A1 WO2013107307A1 PCT/CN2013/070096 CN2013070096W WO2013107307A1 WO 2013107307 A1 WO2013107307 A1 WO 2013107307A1 CN 2013070096 W CN2013070096 W CN 2013070096W WO 2013107307 A1 WO2013107307 A1 WO 2013107307A1
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
- G10L21/0216—Noise filtering characterised by the method used for estimating noise
- G10L2021/02161—Number of inputs available containing the signal or the noise to be suppressed
- G10L2021/02166—Microphone arrays; Beamforming
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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
- H04R2410/00—Microphones
- H04R2410/05—Noise reduction with a separate noise microphone
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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
- H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
- H04R2499/10—General applications
- H04R2499/11—Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's
Definitions
- the present invention relates to noise processing technologies, and in particular, to a noise reduction method and apparatus.
- the current noise reduction technology mainly uses two microphones to actively reduce noise. Through a certain algorithm, the audio data (ie, voice signal and noise) received by two microphones are calculated to determine which are voice signals and which are noises, and then The speech signal is separated from the noise, ie the noise is suppressed.
- the speech signal may be determined to be noise, so that the speech signal is also suppressed to the same degree as the noise signal. , seriously affecting the sound quality after noise reduction, resulting in a reduction in the reliability of noise reduction.
- the present invention provides a noise reduction method and apparatus for improving sound quality and noise reduction reliability after noise reduction.
- One aspect provides a method of noise reduction, including:
- Another aspect provides a noise reduction device, including:
- an obtaining unit configured to obtain a first sound pressure of the audio data received by the first audio input device and a second sound pressure of the audio data received by the second audio input device;
- a processing unit configured to perform noise reduction processing on the audio data according to a difference between the first sound pressure and the second sound pressure and a preset sound pressure threshold.
- the first sound pressure of the audio data received by the first audio input device and the second sound pressure of the audio data received by the second audio input device are obtained by the embodiment of the present invention.
- the noise data can be denoised according to the difference between the first sound pressure and the second sound pressure and the preset sound pressure threshold, so that the signal source corresponding to the sound signal and the two in the prior art can be avoided.
- the problem that the speech signal is suppressed to the same degree as the noise signal caused by the change of the distance between the microphones improves the sound quality and the reliability of noise reduction after noise reduction.
- FIG. 1 is a schematic flowchart of a noise reduction method according to an embodiment of the present invention.
- FIG. 2 is a schematic diagram showing the setting of a double microphone on a terminal device for collecting sound signals by two microphones in the embodiment corresponding to FIG. 1;
- FIG. 3 is a schematic structural diagram of a noise reduction device according to another embodiment of the present invention.
- FIG. 1 is a schematic flowchart of a noise reduction method according to an embodiment of the present invention. As shown in FIG. 1 , the noise reduction method of this embodiment may include:
- the audio data may be audio data in a preset frequency range, thereby further improving the reliability of the noise reduction.
- the preset frequency range can be set to the human voice range, 300 Hz -3400 Hz, which can be achieved by a bandpass filter.
- the difference between the first sound pressure and the second sound pressure is greater than or equal to the preset sound pressure threshold, Using the first noise reduction parameter, performing noise reduction processing on the audio data; if the difference between the first sound pressure and the second sound pressure is less than a preset sound pressure threshold, using the second noise reduction parameter, the audio data is used And performing noise reduction processing; wherein, the noise reduction amount corresponding to the first noise reduction parameter is greater than the noise reduction amount corresponding to the second noise reduction parameter.
- the prompt may further be prompted to adjust the signal corresponding to the signal in the audio data.
- the above audio data is subjected to noise reduction processing.
- the signal source corresponding to the sound signal should be close to the main Audio input device.
- the difference between the second sound pressure and the preset sound pressure threshold, and the noise reduction processing on the audio data can avoid the pair of voices caused by the change of the distance between the signal source corresponding to the sound signal and the two microphones in the prior art.
- the signal performs the same degree of suppression as the noise signal, thereby improving the sound quality and noise reduction reliability after noise reduction.
- the technical solution provided by the embodiment of the present invention can be applied to noise reduction of a mobile phone that collects sound signals through two or more microphones.
- the following is an example of performing noise reduction on a terminal device that performs sound signal collection through a dual microphone.
- S1 is the distance from the mouth to the auxiliary microphone
- S2 is the distance from the mouth to the main microphone.
- S1 is several times larger than S2.
- the sound signal will have a certain attenuation in the air (especially when the auxiliary microphone is on the back of the phone, the sound signal needs to bypass the phone), so the sound pressure of the sound signals received by the two microphones
- the sizes are not equal, usually the main microphone is much larger than the auxiliary microphone.
- the noise source corresponding to the noise is far from the two microphones. Therefore, the distance from the noise source to the main microphone is approximately equal to the distance from the noise source to the auxiliary microphone, that is, the noise received by the two microphones.
- the sound pressure levels are essentially equal.
- the normal noise reduction method in the prior art can be utilized (ie Standard noise reduction parameters), noise reduction processing of audio data.
- the difference between the sound pressure of the sound signal received by the main microphone and the sound pressure of the sound signal received by the auxiliary microphone becomes smaller and smaller, and the phase is getting closer and closer.
- a certain value for example, 10 decibels
- Noise reduction method (ie standard noise reduction parameter) Different noise reduction methods, the noise reduction processing of the audio data, the noise reduction amount of the noise reduction parameter used by the noise reduction method is smaller than the noise reduction amount of the standard noise reduction parameter, so that timely The speech signal is determined to be noise, but the amount of noise reduction is automatically reduced to ensure the quality of the call, thereby improving the reliability of the noise reduction.
- FIG. 3 is a schematic structural diagram of a noise reduction device according to another embodiment of the present invention.
- the noise reduction device of this embodiment may include an obtaining unit 31 and a processing unit 32.
- the obtaining unit 31 is configured to obtain a first sound pressure of the audio data received by the first audio input device and a second sound pressure of the audio data received by the second audio input device; and the processing unit 32 is configured to obtain, according to the obtaining unit 31, And obtaining the difference between the first sound pressure and the second sound pressure and the preset sound pressure threshold, and performing noise reduction processing on the audio data.
- the audio data may be audio data in a preset frequency range, thereby further improving the reliability of the noise reduction.
- the preset frequency range can be set to the human voice range, 300 Hz -3400 Hz, which can be achieved by a bandpass filter.
- the processing unit 32 in this embodiment may be specifically configured to: when the difference between the first sound pressure and the second sound pressure is greater than or equal to a preset sound pressure threshold, using the first noise reduction parameter, the audio Data Performing noise reduction processing; or may be further configured to perform noise reduction processing on the audio data by using a second noise reduction parameter when a difference between the first sound pressure and the second sound pressure is less than a preset sound pressure threshold; The noise reduction amount corresponding to the first noise reduction parameter is greater than the noise reduction amount corresponding to the second noise reduction parameter.
- processing unit 32 in this embodiment may be further configured to: when the difference between the first sound pressure and the second sound pressure is less than a preset sound pressure threshold, prompting to adjust the audio data The distance between the signal source corresponding to the signal and the first audio input device or the second audio input device.
- the first sound pressure of the audio data received by the first audio input device and the second sound pressure of the audio data received by the second audio input device are obtained by the obtaining unit, so that the processing unit can be obtained according to the obtaining unit.
- the difference between the first sound pressure and the second sound pressure and the preset sound pressure threshold are used to perform noise reduction processing on the audio data, thereby avoiding the signal source corresponding to the sound signal and the two microphones in the prior art.
- the problem of the speech signal being suppressed to the same degree as the noise signal caused by the change of the distance between the two, thereby improving the sound quality and the reliability of noise reduction after noise reduction.
- the disclosed systems, devices, and methods may be implemented in other ways.
- 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 for example, 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 shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical, mechanical or otherwise.
- the components displayed by the unit may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives 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 exist physically separately, or two or more units may be integrated into one unit.
- the above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.
- the above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium.
- the software functional unit described above is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform portions of the steps of the methods described in various embodiments of the present invention.
- the foregoing storage medium includes: a U disk, a mobile hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a disk or an optical disk, and the like, and the program code can be stored. Medium.
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Abstract
The present invention provides a noise reduction method and device. In the present invention, a first sound pressure of audio data received by a first audio input device and a second sound pressure of the audio data received by a second audio input device are obtained, so that noise reduction processing can be performed on the audio data according to a difference value between the first sound pressure and the second sound pressure and a preset sound pressure threshold value, and therefore the problem in the prior art of inhibiting speech signals at the same level as noise signals because the distances between a signal source corresponding to a sound signal and two microphones change, thereby enhancing the sound quality after noise reduction and the reliability of noise reduction.
Description
降噪方法及设备 技术领域 本发明涉及噪声处理技术, 尤其涉及一种降噪方法及设备。 TECHNICAL FIELD The present invention relates to noise processing technologies, and in particular, to a noise reduction method and apparatus.
背景技术 随着声音处理技术发展越来越快, 终端设备对需要处理的声音质量的要求 也越来越高, 降噪技术应运而生。 目前的降噪技术主要是釆用双麦克风主动降 噪, 通过一定算法, 对两个麦克风接收到的音频数据(即语音信号和噪声)进 行运算, 确定哪些是语音信号, 哪些是噪声, 然后将语音信号和噪声分离开来, 即对噪声进行抑制。 BACKGROUND OF THE INVENTION As sound processing technology develops faster and faster, terminal equipment demands higher and higher sound quality that needs to be processed, and noise reduction technology emerges as the times require. The current noise reduction technology mainly uses two microphones to actively reduce noise. Through a certain algorithm, the audio data (ie, voice signal and noise) received by two microphones are calculated to determine which are voice signals and which are noises, and then The speech signal is separated from the noise, ie the noise is suppressed.
然而, 如果声音信号对应的信号源 (例如: 人的嘴巴) 与两个麦克风之间 的距离发生变化, 可能导致语音信号被确定为噪声, 使得对语音信号也进行了 与噪声信号同等程度的抑制, 严重影响了降噪之后的声音质量, 导致了降噪的 可靠性的降低。 However, if the distance between the signal source corresponding to the sound signal (for example, the human mouth) and the two microphones changes, the speech signal may be determined to be noise, so that the speech signal is also suppressed to the same degree as the noise signal. , seriously affecting the sound quality after noise reduction, resulting in a reduction in the reliability of noise reduction.
发明内容 本发明提供一种降噪方法及设备, 用以提高降噪之后的声音质量和降噪的 可靠性。 SUMMARY OF THE INVENTION The present invention provides a noise reduction method and apparatus for improving sound quality and noise reduction reliability after noise reduction.
一方面提供了一种降噪方法, 包括: One aspect provides a method of noise reduction, including:
获得第一音频输入设备接收到的音频数据的第一声压和第二音频输入设备 接收到的所述音频数据的第二声压; Obtaining a first sound pressure of the audio data received by the first audio input device and a second sound pressure of the audio data received by the second audio input device;
根据所述第一声压与所述第二声压的差值和预设声压阔值, 对所述音频数 据进行降噪处理。 And denoising the audio data according to a difference between the first sound pressure and the second sound pressure and a preset sound pressure threshold.
另一方面提供了一种降噪设备, 包括: Another aspect provides a noise reduction device, including:
获得单元, 用于获得第一音频输入设备接收到的音频数据的第一声压和第 二音频输入设备接收到的所述音频数据的第二声压; And an obtaining unit, configured to obtain a first sound pressure of the audio data received by the first audio input device and a second sound pressure of the audio data received by the second audio input device;
处理单元, 用于根据所述第一声压与所述第二声压的差值和预设声压阔值, 对所述音频数据进行降噪处理。 And a processing unit, configured to perform noise reduction processing on the audio data according to a difference between the first sound pressure and the second sound pressure and a preset sound pressure threshold.
由上述技术方案可知, 本发明实施例通过获得第一音频输入设备接收到的 音频数据的第一声压和第二音频输入设备接收到的上述音频数据的第二声压,
使得能够根据上述第一声压与上述第二声压的差值和预设声压阔值, 对上述音 频数据进行降噪处理, 能够避免现有技术中由于声音信号对应的信号源与两个 麦克风之间的距离发生变化导致的对语音信号进行与噪声信号同等程度的抑制 的问题, 从而提高了降噪之后的声音质量和降噪的可靠性。 According to the foregoing technical solution, the first sound pressure of the audio data received by the first audio input device and the second sound pressure of the audio data received by the second audio input device are obtained by the embodiment of the present invention. The noise data can be denoised according to the difference between the first sound pressure and the second sound pressure and the preset sound pressure threshold, so that the signal source corresponding to the sound signal and the two in the prior art can be avoided. The problem that the speech signal is suppressed to the same degree as the noise signal caused by the change of the distance between the microphones improves the sound quality and the reliability of noise reduction after noise reduction.
附图说明 为了更清楚地说明本发明实施例或现有技术中的技术方案, 下面将对实施 例或现有技术描述中所需要使用的附图作一简单地介绍, 显而易见地, 下面描 述中的附图是本发明的一些实施例, 对于本领域普通技术人员来讲, 在不付出 创造性劳动性的前提下, 还可以根据这些附图获得其他的附图。 BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below. The drawings are some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive labor.
图 1为本发明一实施例提供的降噪方法的流程示意图; 1 is a schematic flowchart of a noise reduction method according to an embodiment of the present invention;
图 2为图 1对应的实施例中双麦克风进行声音信号釆集的终端设备上双麦 克风的设置示意图; 2 is a schematic diagram showing the setting of a double microphone on a terminal device for collecting sound signals by two microphones in the embodiment corresponding to FIG. 1;
图 3为本发明另一实施例提供的降噪设备的结构示意图。 FIG. 3 is a schematic structural diagram of a noise reduction device according to another embodiment of the present invention.
具体实施方式 为使本发明实施例的目的、 技术方案和优点更加清楚, 下面将结合本发明 实施例中的附图, 对本发明实施例中的技术方案进行清楚、 完整地描述, 显然, 所描述的实施例是本发明一部分实施例, 而不是全部的实施例。 基于本发明中 的实施例, 本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其 他实施例, 都属于本发明保护的范围。 The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. The embodiments are a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.
图 1 为本发明一实施例提供的降噪方法的流程示意图, 如图 1 所示, 本实 施例的降噪方法可以包括: FIG. 1 is a schematic flowchart of a noise reduction method according to an embodiment of the present invention. As shown in FIG. 1 , the noise reduction method of this embodiment may include:
101、获得第一音频输入设备接收到的音频数据的第一声压和第二音频输入 设备接收到的上述音频数据的第二声压; 101. Obtain a first sound pressure of the audio data received by the first audio input device and a second sound pressure of the audio data received by the second audio input device.
可选地, 由于音频输入设备的频率响应范围很宽, 为了避免非语音数据产 生的对算法的干扰, 上述音频数据可以为预设频率范围内的音频数据, 进一步 提高了降噪的可靠性, 例如: 预设频率范围可以设定为为人的语音范围, 300 赫兹(Hz ) -3400Hz, 具体可以通过带通滤波器来实现。 Optionally, since the frequency response range of the audio input device is wide, in order to avoid interference with the algorithm generated by the non-speech data, the audio data may be audio data in a preset frequency range, thereby further improving the reliability of the noise reduction. For example: The preset frequency range can be set to the human voice range, 300 Hz -3400 Hz, which can be achieved by a bandpass filter.
102、 根据上述第一声压与上述第二声压的差值和预设声压阔值, 对上述音 频数据进行降噪处理。 102. Perform noise reduction processing on the audio data according to a difference between the first sound pressure and the second sound pressure and a preset sound pressure threshold.
例如: 如果上述第一声压与上述第二声压的差值大于或等于预设声压阔值,
利用第一降噪参数, 对上述音频数据进行降噪处理; 如果上述第一声压与上述 第二声压的差值小于预设声压阔值, 利用第二降噪参数, 对上述音频数据进行 降噪处理; 其中, 上述第一降噪参数对应的降噪量大于上述第二降噪参数对应 的降噪量。 For example: if the difference between the first sound pressure and the second sound pressure is greater than or equal to the preset sound pressure threshold, Using the first noise reduction parameter, performing noise reduction processing on the audio data; if the difference between the first sound pressure and the second sound pressure is less than a preset sound pressure threshold, using the second noise reduction parameter, the audio data is used And performing noise reduction processing; wherein, the noise reduction amount corresponding to the first noise reduction parameter is greater than the noise reduction amount corresponding to the second noise reduction parameter.
进一步地, 本实施例中, 如果上述第一声压与上述第二声压的差值小于预 设声压阔值, 还可以进一步进行提示, 用以提示调整上述音频数据中的信号对 应的信号源与上述第一音频输入设备或上述第二音频输入设备之间的距离。 如 果没有在规定时间内进行调整, 那么上述第一声压与上述第二声压的差值还是 小于预设声压阔值, 此时, 则不再进行提示, 直接利用第二降噪参数, 对上述 音频数据进行降噪处理。 Further, in this embodiment, if the difference between the first sound pressure and the second sound pressure is less than the preset sound pressure threshold, the prompt may further be prompted to adjust the signal corresponding to the signal in the audio data. The distance between the source and the first audio input device or the second audio input device described above. If the adjustment is not performed within a predetermined time, the difference between the first sound pressure and the second sound pressure is still less than the preset sound pressure threshold. At this time, the prompt is not performed, and the second noise reduction parameter is directly used. The above audio data is subjected to noise reduction processing.
需要说明的是: 本实施例中, 根据声音信号对应的信号源与两个麦克风之 间的距离, 可以确定上述第一音频输入设备和上述第二音频输入设备两个音频 输入设备哪一个作为主音频输入设备, 哪一个作为辅助音频输入设备。 在正常 使用时, 声音信号对应的信号源应该靠近主音频输入设备。 It should be noted that, in this embodiment, according to the distance between the signal source corresponding to the sound signal and the two microphones, which of the two audio input devices of the first audio input device and the second audio input device is used as the main Audio input device, which is used as an auxiliary audio input device. In normal use, the signal source corresponding to the sound signal should be close to the main audio input device.
本实施例中, 通过获得第一音频输入设备接收到的音频数据的第一声压和 第二音频输入设备接收到的上述音频数据的第二声压, 使得能够根据上述第一 声压与上述第二声压的差值和预设声压阈值, 对上述音频数据进行降噪处理, 能够避免现有技术中由于声音信号对应的信号源与两个麦克风之间的距离发生 变化导致的对语音信号进行与噪声信号同等程度的抑制的问题, 从而提高了降 噪之后的声音质量和降噪的可靠性。 In this embodiment, by obtaining the first sound pressure of the audio data received by the first audio input device and the second sound pressure of the audio data received by the second audio input device, enabling the first sound pressure according to the above The difference between the second sound pressure and the preset sound pressure threshold, and the noise reduction processing on the audio data can avoid the pair of voices caused by the change of the distance between the signal source corresponding to the sound signal and the two microphones in the prior art. The signal performs the same degree of suppression as the noise signal, thereby improving the sound quality and noise reduction reliability after noise reduction.
本发明实施例提供的技术方案可以适用于对通过两个以上麦克风进行声音 信号釆集的手机进行降噪。 为使得本发明实施例提供的方法更加清楚, 下面将 以对通过双麦克风进行声音信号釆集的终端设备进行降噪作为举例。 如图 2所 示, S1为嘴巴到辅助麦克风的距离, S2为嘴巴到主麦克风的距离。 通常来说, S1比 S2大好几倍。 对于声音信号(声波), 由于声音信号在空气中会有一定的 衰减(尤其是当辅助麦克风在手机的背面时, 声音信号需要绕过手机), 因此两 个麦克风接收到的声音信号的声压大小是不相等的, 通常主麦克风比辅助麦克 风大很多。 对于环境噪声, 噪声对应的噪声源离两个麦克风都很远, 因此, 噪 声源到主麦克风的距离与噪声源到辅助麦克风的距离是近似相等的, 也就是说 , 两个麦克风接收到的噪声的声压大小是基本相等的。 The technical solution provided by the embodiment of the present invention can be applied to noise reduction of a mobile phone that collects sound signals through two or more microphones. In order to make the method provided by the embodiment of the present invention more clear, the following is an example of performing noise reduction on a terminal device that performs sound signal collection through a dual microphone. As shown in Fig. 2, S1 is the distance from the mouth to the auxiliary microphone, and S2 is the distance from the mouth to the main microphone. In general, S1 is several times larger than S2. For sound signals (sound waves), the sound signal will have a certain attenuation in the air (especially when the auxiliary microphone is on the back of the phone, the sound signal needs to bypass the phone), so the sound pressure of the sound signals received by the two microphones The sizes are not equal, usually the main microphone is much larger than the auxiliary microphone. For ambient noise, the noise source corresponding to the noise is far from the two microphones. Therefore, the distance from the noise source to the main microphone is approximately equal to the distance from the noise source to the auxiliary microphone, that is, the noise received by the two microphones. The sound pressure levels are essentially equal.
当嘴巴离主麦克风很近的时候, 可以利用现有技术中的正常降噪方法 (即
标准降噪参数), 对音频数据进行降噪处理。 When the mouth is very close to the main microphone, the normal noise reduction method in the prior art can be utilized (ie Standard noise reduction parameters), noise reduction processing of audio data.
当嘴巴离主麦克风越来越远的时候, 主麦克风接收到的声音信号的声压与 辅助麦克风接收到的声音信号的声压的差值就变得越来越小, 相位也越来越接 近, 上述差值小于一定数值(例如: 10分贝)的时候, 则可以进行提示, 例如: 在通过听筒播放提示音, 提示用户将嘴巴靠近主麦克风进行讲话。 如果用户没 有进行调整, 下次如果主麦克风接收到的声音信号与辅助麦克风接收到的声音 信号的差值继续小于一定数值(例如: 10分贝 ) 的时候, 则可以利用与现有技 术中的正常降噪方法 (即标准降噪参数) 不同的降噪方法, 对音频数据进行降 噪处理, 该降噪方法所使用的降噪参数的降噪量小于标准降噪参数的降噪量, 使得及时将语音信号确定为噪声, 但是自动降低降噪量, 来保证通话质量, 从 而提高了降噪的可靠性。 When the mouth is getting farther and farther away from the main microphone, the difference between the sound pressure of the sound signal received by the main microphone and the sound pressure of the sound signal received by the auxiliary microphone becomes smaller and smaller, and the phase is getting closer and closer. When the difference is less than a certain value (for example, 10 decibels), you can make a prompt. For example: When the prompt is played through the handset, the user is prompted to speak the mouth close to the main microphone. If the user does not make adjustments, the next time if the difference between the sound signal received by the primary microphone and the sound signal received by the auxiliary microphone continues to be less than a certain value (for example, 10 dB), then it can be utilized with the normal in the prior art. Noise reduction method (ie standard noise reduction parameter) Different noise reduction methods, the noise reduction processing of the audio data, the noise reduction amount of the noise reduction parameter used by the noise reduction method is smaller than the noise reduction amount of the standard noise reduction parameter, so that timely The speech signal is determined to be noise, but the amount of noise reduction is automatically reduced to ensure the quality of the call, thereby improving the reliability of the noise reduction.
需要说明的是: 对于前述的各方法实施例, 为了简单描述, 故将其都表述 为一系列的动作组合, 但是本领域技术人员应该知悉, 本发明并不受所描述的 动作顺序的限制, 因为依据本发明, 某些步骤可以釆用其他顺序或者同时进行。 其次, 本领域技术人员也应该知悉, 说明书中所描述的实施例均属于优选实施 例, 所涉及的动作和模块并不一定是本发明所必须的。 It should be noted that, for the foregoing method embodiments, for the sake of simple description, they are all expressed as a series of action combinations, but those skilled in the art should understand that the present invention is not limited by the described action sequence. Because in accordance with the present invention, certain steps may be performed in other sequences or concurrently. In addition, those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.
在上述实施例中, 对各个实施例的描述都各有侧重, 某个实施例中没有详 述的部分, 可以参见其他实施例的相关描述。 In the above embodiments, the descriptions of the various embodiments are different, and the details are not described in the specific embodiments. For details, refer to related descriptions of other embodiments.
图 3为本发明另一实施例提供的降噪设备的结构示意图, 如图 3所示, 本 实施例的降噪设备可以包括获得单元 31和处理单元 32。 其中, 获得单元 31用 于获得第一音频输入设备接收到的音频数据的第一声压和第二音频输入设备接 收到的上述音频数据的第二声压; 处理单元 32用于根据获得单元 31获得的上 述第一声压与上述第二声压的差值和预设声压阈值, 对上述音频数据进行降噪 处理。 可选地, 由于音频输入设备的频率响应范围很宽, 为了避免非语音数据产 生的对算法的干扰, 上述音频数据可以为预设频率范围内的音频数据, 进一步 提高了降噪的可靠性, 例如: 预设频率范围可以设定为为人的语音范围, 300 赫兹(Hz ) -3400Hz, 具体可以通过带通滤波器来实现。 FIG. 3 is a schematic structural diagram of a noise reduction device according to another embodiment of the present invention. As shown in FIG. 3, the noise reduction device of this embodiment may include an obtaining unit 31 and a processing unit 32. The obtaining unit 31 is configured to obtain a first sound pressure of the audio data received by the first audio input device and a second sound pressure of the audio data received by the second audio input device; and the processing unit 32 is configured to obtain, according to the obtaining unit 31, And obtaining the difference between the first sound pressure and the second sound pressure and the preset sound pressure threshold, and performing noise reduction processing on the audio data. Optionally, since the frequency response range of the audio input device is wide, in order to avoid interference with the algorithm generated by the non-speech data, the audio data may be audio data in a preset frequency range, thereby further improving the reliability of the noise reduction. For example: The preset frequency range can be set to the human voice range, 300 Hz -3400 Hz, which can be achieved by a bandpass filter.
例如: 本实施例中的处理单元 32具体可以用于当上述第一声压与上述第二 声压的差值大于或等于预设声压阔值时, 利用第一降噪参数, 对上述音频数据
进行降噪处理; 或者还可以用于当上述第一声压与上述第二声压的差值小于预 设声压阔值时, 利用第二降噪参数, 对上述音频数据进行降噪处理; 其中, 上 述第一降噪参数对应的降噪量大于上述第二降噪参数对应的降噪量。 For example, the processing unit 32 in this embodiment may be specifically configured to: when the difference between the first sound pressure and the second sound pressure is greater than or equal to a preset sound pressure threshold, using the first noise reduction parameter, the audio Data Performing noise reduction processing; or may be further configured to perform noise reduction processing on the audio data by using a second noise reduction parameter when a difference between the first sound pressure and the second sound pressure is less than a preset sound pressure threshold; The noise reduction amount corresponding to the first noise reduction parameter is greater than the noise reduction amount corresponding to the second noise reduction parameter.
进一步地, 本实施例中的处理单元 32还可以进一步用于当上述第一声压与 上述第二声压的差值小于预设声压阔值时, 进行提示, 用以提示调整上述音频 数据中的信号对应的信号源与上述第一音频输入设备或上述第二音频输入设备 之间的距离。 Further, the processing unit 32 in this embodiment may be further configured to: when the difference between the first sound pressure and the second sound pressure is less than a preset sound pressure threshold, prompting to adjust the audio data The distance between the signal source corresponding to the signal and the first audio input device or the second audio input device.
本实施例中, 通过获得单元获得第一音频输入设备接收到的音频数据的第 一声压和第二音频输入设备接收到的上述音频数据的第二声压, 使得处理单元 能够根据获得单元获得的上述第一声压与上述第二声压的差值和预设声压阔 值, 对上述音频数据进行降噪处理, 能够避免现有技术中由于声音信号对应的 信号源与两个麦克风之间的距离发生变化导致的对语音信号进行与噪声信号同 等程度的抑制的问题, 从而提高了降噪之后的声音质量和降噪的可靠性。 In this embodiment, the first sound pressure of the audio data received by the first audio input device and the second sound pressure of the audio data received by the second audio input device are obtained by the obtaining unit, so that the processing unit can be obtained according to the obtaining unit. The difference between the first sound pressure and the second sound pressure and the preset sound pressure threshold are used to perform noise reduction processing on the audio data, thereby avoiding the signal source corresponding to the sound signal and the two microphones in the prior art. The problem of the speech signal being suppressed to the same degree as the noise signal caused by the change of the distance between the two, thereby improving the sound quality and the reliability of noise reduction after noise reduction.
所属领域的技术人员可以清楚地了解到, 为描述的方便和简洁, 上述描述 的系统, 装置和单元的具体工作过程, 可以参考前述方法实施例中的对应过程, 在此不再赘述。 A person skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and details are not described herein again.
在本申请所提供的几个实施例中, 应该理解到, 所揭露的系统, 装置和方 法, 可以通过其它的方式实现。 例如, 以上所描述的装置实施例仅仅是示意性 的, 例如, 所述单元的划分, 仅仅为一种逻辑功能划分, 实际实现时可以有另 外的划分方式, 例如多个单元或组件可以结合或者可以集成到另一个系统, 或 一些特征可以忽略, 或不执行。 另一点, 所显示或讨论的相互之间的耦合或直 接耦合或通信连接可以是通过一些接口, 装置或单元的间接耦合或通信连接, 可以是电性, 机械或其它的形式。 单元显示的部件可以是或者也可以不是物理单元, 即可以位于一个地方, 或者 也可以分布到多个网络单元上。 可以根据实际的需要选择其中的部分或者全部 单元来实现本实施例方案的目的。 In the several embodiments provided herein, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed. In addition, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical, mechanical or otherwise. The components displayed by the unit may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solution of the embodiment.
另外, 在本发明各个实施例中的各功能单元可以集成在一个处理单元中, 也可以是各个单元单独物理存在, 也可以两个或两个以上单元集成在一个单元 中。 上述集成的单元既可以釆用硬件的形式实现, 也可以釆用硬件加软件功能 单元的形式实现。
上述以软件功能单元的形式实现的集成的单元, 可以存储在一个计算机可 读取存储介质中。 上述软件功能单元存储在一个存储介质中, 包括若干指令用 以使得一台计算机设备(可以是个人计算机, 服务器, 或者网络设备等)执行 本发明各个实施例所述方法的部分步骤。 而前述的存储介质包括: U 盘、 移动 硬盘、只读存储器( Read-Only Memory,简称 ROM )、随机存取存储器( Random Access Memory, 简称 RAM )、 磁碟或者光盘等各种可以存储程序代码的介质。 In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units. The above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium. The software functional unit described above is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform portions of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a U disk, a mobile hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a disk or an optical disk, and the like, and the program code can be stored. Medium.
最后应说明的是: 以上实施例仅用以说明本发明的技术方案, 而非对其限 制; 尽管参照前述实施例对本发明进行了详细的说明, 本领域的普通技术人员 应当理解: 其依然可以对前述各实施例所记载的技术方案进行修改, 或者对其 中部分技术特征进行等同替换; 而这些修改或者替换, 并不使相应技术方案的 本质脱离本发明各实施例技术方案的精神和范围。
It should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: The technical solutions described in the foregoing embodiments are modified, or some of the technical features are equivalently replaced. The modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1、 一种降噪方法, 其特征在于, 包括: A noise reduction method, comprising:
获得第一音频输入设备接收到的音频数据的第一声压和第二音频输入设备 接收到的所述音频数据的第二声压; Obtaining a first sound pressure of the audio data received by the first audio input device and a second sound pressure of the audio data received by the second audio input device;
根据所述第一声压与所述第二声压的差值和预设声压阔值, 对所述音频数 据进行降噪处理。 And denoising the audio data according to a difference between the first sound pressure and the second sound pressure and a preset sound pressure threshold.
2、 根据权利要求 1所述的方法, 其特征在于, 所述音频数据为预设频率范 围内的音频数据。 2. The method according to claim 1, wherein the audio data is audio data within a preset frequency range.
3、 根据权利要求 1或 2所述的方法, 其特征在于, 所述根据所述第一声压 与所述第二声压的差值和预设声压阔值, 对所述音频数据进行降噪处理, 包括: 如果所述第一声压与所述第二声压的差值大于或等于预设声压阔值, 利用 第一降噪参数, 对所述音频数据进行降噪处理; The method according to claim 1 or 2, wherein the audio data is performed according to a difference between the first sound pressure and the second sound pressure and a preset sound pressure threshold The noise reduction process includes: if the difference between the first sound pressure and the second sound pressure is greater than or equal to a preset sound pressure threshold, using the first noise reduction parameter to perform noise reduction processing on the audio data;
如果所述第一声压与所述第二声压的差值小于预设声压阔值, 利用第二降 噪参数, 对所述音频数据进行降噪处理; 其中, If the difference between the first sound pressure and the second sound pressure is less than a preset sound pressure threshold, the audio data is subjected to noise reduction processing by using a second noise reduction parameter;
所述第一降噪参数对应的降噪量大于所述第二降噪参数对应的降噪量。 The noise reduction amount corresponding to the first noise reduction parameter is greater than the noise reduction amount corresponding to the second noise reduction parameter.
4、 根据权利要求 3所述的方法, 其特征在于, 所述根据所述第一声压与所 述第二声压的差值和预设声压阔值, 对所述音频数据进行降噪处理, 还包括: 如果所述第一声压与所述第二声压的差值小于预设声压阔值, 进行提示, 用以提示调整所述音频数据中的信号对应的信号源与所述第一音频输入设备或 所述第二音频输入设备之间的距离。 The method according to claim 3, wherein the noise reduction is performed on the audio data according to a difference between the first sound pressure and the second sound pressure and a preset sound pressure threshold The processing further includes: if the difference between the first sound pressure and the second sound pressure is less than a preset sound pressure threshold, prompting to prompt to adjust a signal source and a signal corresponding to the signal in the audio data The distance between the first audio input device or the second audio input device.
5、 一种降噪设备, 其特征在于, 包括: 5. A noise reduction device, comprising:
获得单元, 用于获得第一音频输入设备接收到的音频数据的第一声压和第 二音频输入设备接收到的所述音频数据的第二声压; And an obtaining unit, configured to obtain a first sound pressure of the audio data received by the first audio input device and a second sound pressure of the audio data received by the second audio input device;
处理单元, 用于根据所述第一声压与所述第二声压的差值和预设声压阔值, 对所述音频数据进行降噪处理。 And a processing unit, configured to perform noise reduction processing on the audio data according to a difference between the first sound pressure and the second sound pressure and a preset sound pressure threshold.
6、 根据权利要求 5所述的设备, 其特征在于, 所述音频数据为预设频率范 围内的音频数据。 6. The device according to claim 5, wherein the audio data is audio data within a preset frequency range.
7、 根据权利要求 5或 6所述的设备, 其特征在于, 所述处理单元具体用于 当所述第一声压与所述第二声压的差值大于或等于预设声压阔值时, 利用 第一降噪参数, 对所述音频数据进行降噪处理; The device according to claim 5 or 6, wherein the processing unit is specifically configured to: when a difference between the first sound pressure and the second sound pressure is greater than or equal to a preset sound pressure threshold Use a first noise reduction parameter, performing noise reduction processing on the audio data;
当所述第一声压与所述第二声压的差值小于预设声压阔值时, 利用第二降 噪参数, 对所述音频数据进行降噪处理; 其中, When the difference between the first sound pressure and the second sound pressure is less than the preset sound pressure threshold, the audio data is subjected to noise reduction processing by using the second noise reduction parameter;
所述第一降噪参数对应的降噪量大于所述第二降噪参数对应的降噪量。 The noise reduction amount corresponding to the first noise reduction parameter is greater than the noise reduction amount corresponding to the second noise reduction parameter.
8、 根据权利要求 7所述的设备, 其特征在于, 所述处理单元还用于 当所述第一声压与所述第二声压的差值小于预设声压阔值时, 进行提示, 用以提示调整所述音频数据中的信号对应的信号源与所述第一音频输入设备或 所述第二音频输入设备之间的距离。 The device according to claim 7, wherein the processing unit is further configured to: when the difference between the first sound pressure and the second sound pressure is less than a preset sound pressure threshold And prompting to adjust a distance between a signal source corresponding to the signal in the audio data and the first audio input device or the second audio input device.
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CN110544486A (en) * | 2019-09-02 | 2019-12-06 | 上海其高电子科技有限公司 | Speech enhancement method and system based on microphone array |
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CN110544486B (en) * | 2019-09-02 | 2021-11-02 | 上海其高电子科技有限公司 | Speech enhancement method and system based on microphone array |
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