WO2013078677A1 - 一种自适应调节音效的方法和设备 - Google Patents
一种自适应调节音效的方法和设备 Download PDFInfo
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- WO2013078677A1 WO2013078677A1 PCT/CN2011/083373 CN2011083373W WO2013078677A1 WO 2013078677 A1 WO2013078677 A1 WO 2013078677A1 CN 2011083373 W CN2011083373 W CN 2011083373W WO 2013078677 A1 WO2013078677 A1 WO 2013078677A1
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- voice
- output volume
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- 238000000034 method Methods 0.000 title claims abstract description 70
- 230000000694 effects Effects 0.000 title claims abstract description 46
- 238000012545 processing Methods 0.000 claims abstract description 19
- 238000001514 detection method Methods 0.000 claims description 21
- 230000007613 environmental effect Effects 0.000 claims description 18
- 238000001228 spectrum Methods 0.000 claims description 17
- 230000008569 process Effects 0.000 claims description 13
- 238000012360 testing method Methods 0.000 claims description 2
- 230000004044 response Effects 0.000 abstract description 30
- 238000004422 calculation algorithm Methods 0.000 description 14
- 238000010586 diagram Methods 0.000 description 11
- 230000006870 function Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- NAWXUBYGYWOOIX-SFHVURJKSA-N (2s)-2-[[4-[2-(2,4-diaminoquinazolin-6-yl)ethyl]benzoyl]amino]-4-methylidenepentanedioic acid Chemical compound C1=CC2=NC(N)=NC(N)=C2C=C1CCC1=CC=C(C(=O)N[C@@H](CC(=C)C(O)=O)C(O)=O)C=C1 NAWXUBYGYWOOIX-SFHVURJKSA-N 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/32—Automatic control in amplifiers having semiconductor devices the control being dependent upon ambient noise level or sound level
-
- 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
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G5/00—Tone control or bandwidth control in amplifiers
- H03G5/16—Automatic control
- H03G5/165—Equalizers; Volume or gain control in limited frequency bands
-
- 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
- G10L2021/02087—Noise filtering the noise being separate speech, e.g. cocktail party
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
- H04M1/6016—Substation equipment, e.g. for use by subscribers including speech amplifiers in the receiver circuit
Definitions
- the present invention relates to the field of communication technologies, and in particular, to a method and apparatus for adaptively adjusting sound effects. Background technique
- wireless devices have been widely used, such as walkie-talkies, mobile phones, televisions, and the like.
- a wireless device When using a wireless device, it is often necessary to adjust the sound of the device based on changes in the environment. For example, when using a walkie-talkie, the environment in which the user is located is often constantly changing. When the user changes from a quiet place to a noisy place, in order to get better sound and improve the clarity of the voice, the user often needs to manually turn up the volume. This method of requiring the user to manually adjust the volume is cumbersome, so that the user cannot concentrate on his work and reduces the user experience.
- the method provided by the prior art adjusts the audio response by detecting the ambient noise level to improve the definition of the radio receiver in a high ambient noise region. This method can only adjust the resolution of the radio receiver, and does not automatically adjust the output volume of the radio receiver, so the adjusted sound is not ideal.
- the prior art does not have a method of adjusting the volume and adjusting the audio response when the environment changes.
- the method provided by the prior art adjusts the audio response by detecting the ambient noise level, and detecting the ambient noise level does not distinguish the true noise in the background environment from the speech interference well, and it is easy to voice the voice. Judging into noise, forming a false positive. The resulting ambient noise level does not truly reflect changes in ambient noise, and the resulting sound effects are not accurate. Summary of the invention
- an embodiment of the present invention provides a method and a device for adaptively adjusting a sound effect, which can adjust the volume according to the current ambient noise energy, and can adjust the frequency response, thereby obtaining a better Sound effect adjustment results are simple to implement.
- an embodiment of the present invention provides a method for adaptively adjusting a sound effect, the method being applied to a device having an audio output device, the method comprising:
- the treble enhancement processing is performed; when it is determined that the energy value of the current environmental noise is less than the second threshold, the bass enhancement processing is performed.
- the adjusting the current output volume according to the energy value of the current ambient noise comprises:
- the method further includes: determining whether the sum value is greater than a third threshold, and if yes, using the third threshold as a current output volume value;
- the method further includes:
- the current output volume value is used as a reference volume value; the current ambient noise energy value corresponding to the current output volume value is used as a reference noise energy value.
- the method before acquiring the energy value of the current ambient noise, the method further includes: Collecting sound data, performing voice activity detection on the sound data, and determining whether the sound data is voice;
- the performing voice activity detection on the sound data comprises:
- Obtaining a formant according to the LPC spectrum determining whether the formant meets a preset condition according to a characteristic of the formant; determining that the sound data is a voice when a preset condition is met; and when a preset condition is not met, It is judged that the sound data is not a voice.
- the preset condition is:
- the interval is obtained according to the LPC spectrum
- the amplitude of the formant is in a preset interval, it is determined that the sound data is a voice.
- the first triggering instruction is:
- the device detects that there is a call access or the device receives an automatic adjustment command.
- an embodiment of the present invention further provides an apparatus for adaptively adjusting a sound effect, the device having an audio output device, and the device includes:
- a noise acquisition module configured to obtain an energy value of current environmental noise
- a receiving module configured to receive a first trigger instruction
- a first adjustment module configured to adjust a current output volume according to an energy value of the current ambient noise
- a second adjustment module configured to perform a treble enhancement process when determining that the energy value of the current ambient noise is greater than a first threshold; and performing a bass enhancement process when determining that the energy value of the current ambient noise is less than a second threshold .
- the first adjustment module includes a difference acquisition unit, a value acquisition unit, and an output volume acquisition unit, where
- the difference obtaining unit is configured to obtain a difference between a current ambient noise energy value and a reference noise energy value
- the sum value obtaining unit is configured to obtain a sum of the difference value and a reference volume value; wherein, the parameter The test volume value is an output volume value set by the recorded user, and the reference noise energy value has a corresponding relationship with the reference volume value;
- the output volume acquisition unit is configured to adjust the volume of the device to the current output volume value by using the sum value as a current output volume value.
- the sum value obtaining unit and the output volume acquiring unit further comprise: a first determining unit, configured to determine whether the sum value is greater than a third threshold, and if yes, the third wide The value is used as the current output volume value;
- the second determining unit is configured to determine whether the sum value is less than a fourth threshold, and if so, the fourth threshold is used as a current output volume value.
- the device further includes:
- the voice detection module is configured to collect voice data, perform voice activity detection on the voice data, and determine whether the voice data is voice.
- the voice detection module includes:
- An LPC acquisition unit configured to acquire an LPC spectrum of the sound data
- a third determining unit configured to obtain a formant according to the LPC spectrum, and when the formant meets a preset condition, determine that the sound data is a voice; when the preset condition is not met, determine that the sound data is not a voice .
- the device is a walkie-talkie.
- the method provided by the embodiment of the present invention can adjust the current output volume according to the current ambient noise energy value, and can be enhanced by treble or bass. Adjust the frequency response.
- the method provided by the invention can automatically adjust the volume and audio response, and minimize the influence of environmental changes on the user's use for users who need to continuously move in different places, without the user's own adjustment. , to make users more focused on their work.
- the method provided by the invention adjusts the volume and frequency response according to the current ambient noise energy value, and the adjustment effect is more comprehensive, so that the sound is clearer and more realistic, and a better sound effect is obtained, thereby improving the user experience.
- FIG. 1 is a flowchart of a first embodiment of a method for adaptively adjusting sound effects according to an embodiment of the present invention
- FIG. 2 is a flowchart of a second embodiment of a method for adaptively adjusting sound effects according to an embodiment of the present invention
- FIG. 4 is a schematic diagram of a method for smoothly adjusting a volume according to an embodiment of the present invention.
- FIG. 5 is a schematic diagram of adjusting a high-pitched enhanced frequency response according to an embodiment of the present invention.
- FIG. 6 is a schematic diagram of adjustment of a bass enhanced frequency response according to an embodiment of the present invention.
- FIG. 7 is a schematic diagram of a first embodiment of an apparatus for adaptively adjusting sound effects according to an embodiment of the present invention
- FIG. 8 is a schematic diagram of a second embodiment of an apparatus for adaptively adjusting sound effects according to an embodiment of the present invention.
- the embodiment of the invention provides a method and a device for adaptively adjusting the sound effect, which can adjust the volume according to the current ambient noise energy, and can adjust the frequency response, thereby obtaining a better sound effect adjustment result and being simple to implement. .
- FIG. 1 is a flow chart of a first embodiment of a method for adaptively adjusting sound effects according to an embodiment of the present invention. The method is applied to a device having an audio output device, the method comprising:
- S102 Receive a first trigger instruction, and adjust a current output volume according to the energy value of the current ambient noise.
- the first threshold is a preset value used to represent the noise threshold.
- the second threshold is a pre-set value used to characterize the quiet threshold.
- the current output volume is adjusted according to the obtained energy value of the current ambient noise; when it is determined that the energy value of the current ambient noise is greater than the first threshold And performing a treble enhancement process; when it is determined that the energy value of the current ambient noise is less than a second threshold, performing a bass enhancement process.
- the method provided by the embodiment of the invention can adjust the current output volume, adjust the frequency response by high-pitched enhancement or bass enhancement, obtain better sound effect adjustment result, and realize simple implementation.
- the method provided by the embodiment of the present invention can be applied to a device having an audio output device, including but not limited to a walkie-talkie, a mobile phone, a television, a radio, etc., which is not limited by the present invention.
- a device having an audio output device including but not limited to a walkie-talkie, a mobile phone, a television, a radio, etc.
- the specific embodiment of the present invention will be described in detail below by taking a walkie-talkie as an example.
- FIG. 2 is a flow chart of a second embodiment of a method for adaptively adjusting sound effects according to an embodiment of the present invention.
- S202 Perform voice activity detection on the voice data, and determine whether the voice data is voice data.
- the voice activity detection algorithm used is based on the characteristics of the speech formant, and first acquires an LPC (Linear Pred ivet ive Coding) spectrum of the sound data, and then according to the The LPC spectrum acquires a formant, and when the formant satisfies a preset condition, it is determined that the sound data is a voice; when the preset condition is not satisfied, it is determined that the sound data is not a voice.
- LPC Linear Pred ivet ive Coding
- step S202 specifically includes:
- S202A Perform segmentation processing on the acquired sound data.
- the frame overlap processing is performed on the data of the set frame length to reduce the discontinuity in the inter-frame time domain.
- Place The frame length set may be a length of a data frame of 20 ms, and the overlap between frames is 10 ms.
- S202B Perform pre-emphasis processing on the sound data of each segment.
- the pre-emphasis processing is performed to compensate for the attenuation of the high frequency portion of the speech.
- the transfer function of the pre-emphasis filter used is as shown in the formula (1):
- window processing is performed here.
- the windowing process is performed by the following formula:
- Sw(n) is the windowed signal and S(n) is the pre-windowed signal
- W (n) is a window function
- N is the frame length.
- the windowing function uses a Hamming algorithm, and the amplitude of the Hamming window is:
- linear predictive analysis The basic idea of linear predictive analysis is that the present value of a speech sample can be approximated by a weighted linear combination of several speech samples of past values.
- the system function is:
- s (n) is the input speech signal and 1 is the serial number of the autocorrelation coefficient.
- i is the current order
- e(i) is the prediction variance under the current order
- k(i) is the reflection system (! ⁇ )
- the number, ' represents the jth prediction coefficient of the i-order predictor.
- the frequency range of 100 Hz to 2800 Hz is divided into a plurality of intervals, and specifically, it can be divided into 9 sections, each section having a width of 300 Hz, and each section is searched one by one, if within the section If a formant is found, the value in the interval of the frame is recorded as the amplitude of the formant. M. If the formant is not found, then M is 0. Table 1 shows an example of dividing the frequency range.
- S202G Determine, according to the obtained formant, whether the sound data is a voice.
- the current frame is a speech frame.
- the first formant frequency is less than 1000 Hz, that is, within the first three intervals
- the formant curve is obtained by linear prediction, and it is determined whether the sound data is voice or not, and other algorithms can be used for language activity detection. Specifically, the following algorithm can be used for voice activity detection:
- the energy-based algorithm makes a decision as to whether or not the speech is made by comparing the frame energy with a set threshold.
- the set threshold can be updated by certain rules.
- Pitch detection algorithm Depending on the principle that the periodicity of the speech signal is stronger than the noise signal, a verbal decision can be made. The advantage of this algorithm is that it can significantly reduce false triggering of shock and white noise.
- Short-term information entropy algorithm This algorithm is based on the probability summation of the frequency sub-components of the speech signal to make a speech-free decision. The advantage is that the detection is accurate under low signal-to-noise ratio and stationary noise.
- ⁇ ⁇ ⁇ _ ⁇ + ( ⁇ _ ⁇ ) ⁇ ⁇ ( 8 )
- ⁇ is the smoothing factor
- ⁇ ' is the sound sample data
- ⁇ is the number of points included in one frame.
- N 160 sample point data.
- the first triggering instruction may be that the device detects that there is a call access or the device receives an automatic adjustment command.
- the walkie-talkie detects that there is call access as the first trigger instruction.
- the volume adjustment can also be triggered when an auto adjustment command is received.
- S204A Obtain a difference between a current ambient noise energy value and a reference noise energy value.
- the ambient noise energy value En calculated at the previous standby is used as the current noise energy value, and the difference from the reference noise energy value is calculated.
- the reference volume value is an output volume value set by the recorded user, and the reference noise energy value has a corresponding relationship with the reference volume value. Specifically, when the user manually adjusts the output volume, the output volume set by the user can be used as the reference volume. The ambient noise energy calculated during standby before the user is manually set is used as the reference noise energy. The reference noise energy value is consistent with the current noise energy value calculation method. The reference noise energy value is changed only when the user manually adjusts the volume.
- S204B Acquire a sum of the difference value and a reference volume value.
- S204C using the sum value as a current output volume value, and adjusting a volume of the device to the current output volume value.
- the current output volume value Vn can be calculated according to the following formula:
- Vn Vr+ (En-Er) ( 9 ) where Vn is the current output volume value, Vr is the reference volume value, and En is the current noise energy value. Er is the reference noise energy value.
- the increment of the volume change is obtained in increments of ambient noise.
- the product of the sum value and the adjustment parameter may also be used as the current output volume value according to the specific situation, and the current output volume value may be obtained according to the following formula:
- Vn [ Vr+ (En-Er) ] * a ( 10 )
- Vn is the current output volume value
- Vr is the reference volume value
- En is the current noise energy value
- Er is the reference noise energy value
- a is the adjustment parameter.
- the adjustment parameter a can be specifically set.
- different adjustment parameters may be set according to different application scenarios, such as roads, factories, airports, sports venues, and the like, and the adjustment parameters are determined by an empirical value.
- the adjustment parameters can provide variations in different volume increments.
- the adjustment parameter can be set to 0.5.
- the adjustment parameter can be set to 2.
- the adjustment parameter can be set by the user or set by the system. When the adjustment parameter is 1, the current output volume value is equal to the sum of the reference volume value and the noise increase.
- the method may further include:
- the method before the sum value is used as the current output volume value, the method further includes determining whether the sum value is greater than a set third threshold value and determining whether the sum value is less than a set fourth value.
- the third threshold and the fourth threshold are preset values that characterize the range of volume gain adjustment.
- 3 is a schematic diagram of a volume adjustment curve according to an embodiment of the present invention. Among them, curve A is the maximum adjustable gain curve, curve C is the minimum adjustable gain curve, and curve B is the normal gain curve. When the range is exceeded, the volume adjustment is no longer performed, so that the user can obtain more Good hearing effect.
- the method further includes: determining whether the product of the sum value and the adjustment parameter is greater than the third threshold. If yes, the third threshold is used as the current output volume value; determining whether the product of the sum value and the adjustment parameter is less than a fourth threshold, and if so, using the fourth threshold as the current output volume value. In this way, the volume adjustment can be kept in an appropriate range to give the user a better hearing effect.
- the reference volume may specifically be a volume value when the user manually adjusts the volume.
- the reference volume value is updated each time the user manually adjusts the volume.
- the current ambient noise energy value corresponding to the current output volume value is used as the reference noise energy value.
- FIG. 4 is a schematic diagram of a method for smoothly adjusting volume according to an embodiment of the present invention.
- line 1 indicates a case where the volume is turned up
- line 2 indicates a case where the volume is turned down.
- the frequency response of the normal speech filter in the hearing range is flat.
- the human ear is relatively sensitive to high-frequency sound. If the ambient noise is high, it is easier to hear the speaker's content when the high frequency is raised. However, when the ambient is quiet, the high-frequency part of the voice is too much, which sounds harsh. .
- the present invention can also adaptively adjust the frequency response according to the surrounding environment, so that the user can obtain a better sense of hearing.
- the step S205 may specifically include:
- the first threshold value may be preset to be a noise threshold.
- the treble enhancement filter is used to adjust the frequency response. As shown in Figure 5, the treble enhances the frequency response adjustment diagram.
- the bass enhancement processing is performed.
- the second threshold may be preset to be a quiet threshold.
- the bass enhancement filter is used to adjust the frequency response.
- Figure 6 it is a schematic diagram of the bass boost frequency response adjustment. It can be seen from FIG. 5 and FIG. 6 that the method provided by the embodiment of the present invention improves the frequency response when the frequency response is adjusted, and a better sound effect can be obtained.
- voice activity detection is performed on the sound data, thereby determining whether the sound data is voice, and when it is determined that the sound data is not voice, it is used as current environmental noise.
- FIG. 7 is a schematic diagram of a first embodiment of an apparatus for adaptively adjusting sound effects according to an embodiment of the present invention.
- the device has an audio output device, and the device includes:
- the noise acquiring module 1 00 is configured to obtain an energy value of the current ambient noise
- the receiving module 200 is configured to receive a first trigger instruction
- the first adjustment module 300 is configured to adjust the current output volume according to the energy value of the current ambient noise
- the second adjustment module 400 is configured to perform a treble enhancement process when determining that the energy value of the current ambient noise is greater than the first threshold; and perform bass enhancement when determining that the energy value of the current ambient noise is less than the second threshold deal with.
- FIG. 8 is a schematic diagram of a second embodiment of an apparatus for adaptively adjusting sound effects according to an embodiment of the present invention.
- the first adjustment module includes a difference obtaining unit 31 0, a value acquiring unit 320, and an output volume acquiring module 350, where
- the difference obtaining unit 31 0 is configured to obtain a current ambient noise energy value and a reference noise energy value. Difference
- the sum value obtaining unit 320 is configured to obtain a sum of the difference value and the reference volume value, where the reference volume value is an output volume value set by the recorded user, the reference noise energy value and the reference volume Values have a corresponding relationship;
- the output volume acquisition unit 350 is configured to adjust the volume of the device to the current output volume value by using the sum value as a current output volume value.
- the sum value acquiring unit 320 and the output volume acquiring unit 350 further include:
- the first determining unit 330 is configured to determine whether the sum value is greater than a third threshold, and if yes, using the third threshold as a current output volume value;
- the second determining unit 340 is configured to determine whether the sum value is less than a fourth threshold, and if so, the fourth threshold is used as a current output volume value.
- the device further includes:
- the voice detection module 500 is configured to collect voice data, perform voice activity detection on the voice data, and determine whether the voice data is voice.
- the voice detection module includes:
- the LPC acquisition unit 51 0 is configured to acquire an LPC spectrum of the sound data.
- a third determining unit 520 configured to acquire a formant according to the LPC spectrum, and when the formant meets a preset condition, determine that the sound data is a voice; when the preset condition is not met, determine that the sound data is not voice.
- the device is a walkie-talkie.
- the device can also be any device having an audio output device, such as a cell phone, television, radio, and the like.
- the invention may be described in the general context of computer-executable instructions executed by a computer, such as a program module.
- program modules include routines, programs, objects, components, data structures, and the like that perform particular tasks or implement particular abstract data types.
- the invention may also be practiced in distributed computing environments where tasks are performed by remote processing devices that are connected through a communication network.
- program modules can be located in both local and remote computer storage media including storage devices.
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Abstract
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DE112011105908.6T DE112011105908B4 (de) | 2011-12-02 | 2011-12-02 | Verfahren und Gerät zur adaptiven Regelung des Toneffekts |
PCT/CN2011/083373 WO2013078677A1 (zh) | 2011-12-02 | 2011-12-02 | 一种自适应调节音效的方法和设备 |
US14/361,367 US9183846B2 (en) | 2011-12-02 | 2011-12-02 | Method and device for adaptively adjusting sound effect |
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US20140337018A1 (en) | 2014-11-13 |
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US9183846B2 (en) | 2015-11-10 |
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