WO2018076540A1 - Volume control method, device and system for on-board speakers - Google Patents

Abstract

A volume control method, device and system for on-board speakers. By acquiring a sound signal picked up by each on-board microphone, and according to the different influencing weight of each on-board microphone with respect to each on-board speaker, the influencing weight being determined by the distance between that on-board microphone and that on-board speaker, the method adjusts the output volume of on-board speakers which are distributed in different positions within the car, to different extents. The invention can adjust, according to the positions of the sound sources corresponding to the sound signals collected by the microphones, the output volume of on-board speakers distributed in different positions within the car to different extents, effectively improving user experience.

Description

Volume control method, device and system for vehicle speaker Technical field

The present invention relates to the field of electronic technologies, and in particular, to a volume control method, apparatus, and system for a car speaker.

Background technique

With the steady development of the automotive industry, the types of in-vehicle electronic devices deployed in automobiles are becoming more and more abundant, such as car navigation devices, vehicle warning devices, and in-vehicle multimedia entertainment devices. The above devices emit navigation warning sounds and driving warning sounds through the car speakers. And multimedia entertainment sounds, which make people more convenient, safe and comfortable driving. However, in some cases, the output volume of the car speaker is too large, which brings a lot of inconvenience. In the conventional method, the manual adjustment of the output volume of the speaker is required, the operation is troublesome, and the driver's attention is easily dispersed, and the driving is increased. The danger.

The appearance of the volume control device of the car speaker solves the above problem to some extent, and can automatically adjust the output volume of the car speaker according to the change of the sound signal collected by the microphone in the car. However, the prior art adopts a one-size-fits-all control method, that is, the output volume of all the speakers in the car is adjusted by the same amplitude according to the collected sound signal, and cannot be adjusted according to the position of the sound source of the collected sound signal. The output volume of the speakers distributed throughout the compartment has a poor user experience.

Summary of the invention

The technical problem to be solved by the present invention is to provide a method, a device and a system for controlling the volume of a vehicle-mounted speaker, which can adjust the output volume of a speaker distributed throughout the vehicle according to the sound source position of the sound signal collected by the microphone. Effectively improve the user experience.

In order to solve the above technical problem, an aspect of an embodiment of the present invention provides a volume control method for a car speaker, the method comprising:

S11. Acquire sound signals picked up by N car microphones respectively;

S12. Set a volume influence value of each of the N car microphones according to the sound signal.

S13. Calculate, according to a volume influence value of each of the N car microphones and an influence weight value of each of the car microphones on the mth car speakers of the M car speakers, calculate the mth car speaker Weighting the volume adjustment value to obtain a weighted volume adjustment value for each of the M car speakers; wherein The influence weight value is determined according to a distance between each of the in-vehicle microphones and the mth in-vehicle speaker; m is a positive integer less than or equal to M;

S14. Adjust an output volume of the corresponding car speaker according to the weighted volume adjustment value of each of the car speakers.

Preferably, the step S12 includes:

When vocal detection is required, and at least one of the sound signals is detected to have the vocal signal, the volume influence value of the onboard microphone picked up to the vocal signal is set to a first preset value, and The volume influence value of the in-vehicle microphone that has not picked up the vocal signal is set to a second preset value.

Preferably, the step S12 further includes:

When it is required to perform vocal detection, and detecting that the vocal signal is not included in the sound signal, calculating, according to the noise signal in the sound signal picked up by each of the vehicle microphones, each of the vehicle microphones The volume affects the value.

Preferably, the step S12 includes:

When the vocal detection is not required, the volume influence value of each of the on-vehicle microphones is separately calculated according to the noise signal in the sound signal picked up by each of the on-vehicle microphones.

Preferably, the calculating, according to the noise signal in the sound signal of each of the in-vehicle microphones, the volume influence value of each of the in-vehicle microphones, specifically:

Obtaining, respectively, a noise signal strength in the sound signal picked up by each of the vehicle microphones;

Each noise signal strength is multiplied by an influence coefficient to obtain a volume influence value of each of the in-vehicle microphones; wherein the influence coefficient is determined by the intensity of the influence of the noise on the volume.

Preferably, after the step S11, before the step S12, the method further includes:

Detecting a type of the audio signal currently output by the M car speakers; wherein each type of the audio signal is pre-configured with vocal detection information corresponding thereto; the vocal detection information is used to determine whether vocal detection is required; The vocal detection information configured according to the type of the currently outputted audio signal determines whether vocal detection is required.

Specifically, the step S14 specifically includes:

Calculating, respectively, a sum of the weighted volume adjustment value of each of the onboard speakers and a set volume value thereof to obtain a target volume value of each of the onboard speakers;

The output volume of each of the onboard speakers is adjusted to a corresponding target volume value.

Preferably, the adjusting the output volume of each car speaker to the corresponding target volume value is specifically:

The output volume of each of the onboard speakers is gradually adjusted to a corresponding target volume value.

Further, the gradually adjusting the output volume of each car speaker to the corresponding target volume value includes:

Obtaining a current output volume of each of the onboard speakers;

Calculating, respectively, a difference between a current output volume of each of the onboard speakers and a target volume value thereof;

Determining, respectively, whether an absolute value of a difference between a current output volume of each of the onboard speakers and a target volume value thereof satisfies a preset condition; wherein the preset condition is an absolute value of a difference between a current output volume of the onboard speaker and a target volume value thereof Less than a preset threshold;

For the onboard speaker that does not satisfy the preset condition, the current transition volume value is respectively calculated according to the preset time interval, and the calculation formula of the current transition volume value is: V0=V3+[V2-(V3-V1)] · K; where V0 is; V1 is the set volume value of the car speaker, V2 is the weighted volume adjustment value of the car speaker, K is the preset coefficient of variation; V3 is the current output volume of each car speaker; K is less than or Equal to 1;

The output volume of each of the car speakers is adjusted to a corresponding current transition volume value.

Preferably, the method further includes:

For the on-board speaker that satisfies the preset condition, its current transition volume value is set to its target volume value, respectively.

Correspondingly, an aspect of an embodiment of the present invention further provides a volume control device for a car speaker, the device comprising:

a sound signal acquiring module, configured to respectively acquire sound signals picked up by the N car microphones;

a volume influence value setting module, configured to respectively set a volume influence value of each of the N car microphones according to the sound signal;

a weighted volume adjustment value calculation module, configured to calculate, according to a volume influence value of each of the N car microphones and an influence weight value of each of the car microphones on the mth car speaker of the M car speakers a weighted volume adjustment value of the mth car speaker to obtain a weighted volume adjustment value of each of the M car speakers; wherein the influence weight value is according to each of the car microphones and the first m is determined by the distance between the car speakers; m is a positive integer less than or equal to M; and,

And an output volume adjustment module, configured to adjust an output volume of the corresponding car speaker according to the weighted volume adjustment value of each of the car speakers.

Preferably, the volume influence value setting module comprises:

a first volume influence value setting unit, configured to: when a vocal sound detection is required, and when at least one of the sound signals is detected to have the vocal signal, a volume effect of a car microphone that picks up the vocal signal The value is set to a first preset value, and a volume influence value of the in-vehicle microphone that has not been picked up to the vocal signal is set to a second preset value.

Preferably, the volume influence value setting module further includes:

a second volume influence value setting unit, configured to detect noise in the sound signal picked up by each of the vehicle-mounted microphones when vocal sound detection is required, and when the vocal signal is not detected in the sound signal The signals respectively calculate the volume influence value of each of the in-vehicle microphones.

Preferably, the volume influence value setting module comprises:

And a third volume influence value setting unit configured to calculate, respectively, a volume influence value of each of the in-vehicle microphones according to a noise signal in the sound signal picked up by each of the in-vehicle microphones when the human voice detection is not required.

Preferably, the device further comprises:

An audio type detecting module, configured to detect a type of an audio signal currently output by the M car speakers; wherein each type of the audio signal is pre-configured with a corresponding voice detection information; the voice detection information is used for determining Whether vocal testing is required; and,

The vocal detection requirement determination module is configured to determine whether vocal detection is required according to the vocal detection information configured by the type of the currently output audio signal.

Specifically, the output volume adjustment module specifically includes:

a target volume value obtaining unit, configured to separately calculate a sum of a weighted volume adjustment value of each of the onboard speakers and a set volume value thereof to obtain a target volume value of each of the onboard speakers, respectively;

And an output volume adjusting unit, configured to adjust an output volume of each of the car speakers to a corresponding target volume value.

Preferably, the output volume adjustment unit is specifically configured to:

The output volume of each of the onboard speakers is gradually adjusted to a corresponding target volume value.

Further, the output volume adjustment unit includes:

a current output volume acquisition subunit, configured to acquire a current output volume of each of the onboard speakers; a difference calculation subunit, configured to separately calculate a difference between a current output volume of each of the onboard speakers and a target volume value thereof;

a preset condition determining subunit, configured to respectively determine whether an absolute value of a difference between a current output volume of each of the onboard speakers and a target volume value thereof satisfies a preset condition; wherein the preset condition is a current output volume of the onboard speaker The absolute value of the difference from the target volume value is less than a preset threshold;

The transition volume value calculation subunit is configured to calculate, for a car speaker that does not satisfy the preset condition, a current transition volume value according to a preset time interval, and the current transition volume value is calculated as: V0=V3+ [V2-(V3-V1)]·K; wherein, V0 is a current transition volume value of the car speaker; V1 is a set volume value of the car speaker, and V2 is a weighted volume adjustment value of the car speaker, V3 is the current output volume of the car speaker; K is a preset coefficient of variation, and K is a positive number less than 1;

And an output volume adjustment subunit, configured to respectively adjust an output volume of each of the onboard speakers to a corresponding current transition volume value.

Preferably, the device further comprises:

The transition volume value setting subunit, for the onboard speaker that satisfies the preset condition, respectively sets its current transition volume value to its target volume value.

Correspondingly, an aspect of an embodiment of the present invention further provides a volume control system for an in-vehicle speaker, the system comprising: N car speakers, M car microphones, and volume control devices of the car speakers provided in the above embodiments.

The implementation of the present invention has the following beneficial effects:

The method, device and system for controlling the volume of the vehicle-mounted speaker provided by the embodiment of the present invention acquire the sound signals picked up by each of the vehicle-mounted microphones respectively, and adjust the distribution weights according to the different influence weights of each of the vehicle-mounted microphones on the respective vehicle-mounted speakers. The output volume of the vehicle-mounted speaker in the vehicle compartment, wherein the influence weight is determined by the distance between the vehicle-mounted microphone and the vehicle-mounted speaker. It can be seen that the embodiment of the present invention can adjust the distribution according to the sound source position of the sound signal collected by the microphone. The output volume of the speakers throughout the compartment effectively improves the user experience.

DRAWINGS

1 is a schematic flow chart of an embodiment of a volume control method of a vehicle-mounted speaker provided by the present invention;

2 is a schematic structural diagram of an embodiment of a volume control device for a vehicle-mounted speaker provided by the present invention;

3 is a flow chart showing an embodiment of a volume control system for a vehicle-mounted speaker provided by the present invention.

detailed description

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. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all 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.

An aspect of an embodiment of the present invention provides a volume control method for a car speaker.

Please refer to FIG. 1 , which is a schematic flowchart diagram of an embodiment of a volume control method for a vehicle-mounted speaker provided by the present invention, where the method includes the following steps:

S11. Acquire sound signals picked up by N car microphones respectively;

The car microphone is an audio input device disposed in the car body for picking up the sound signal and converting it into an electric signal. Therefore, the sound signal acquired at this time is actually an electric signal converted by the microphone.

It should be noted that, according to the pickup ability of the microphone for sounds from various directions, that is, the sensitivity to sounds in different directions, the existing microphones are mainly classified into three types: omnidirectionality, bidirectionality, and unidirectionality.

In the embodiment of the present invention, a unidirectional microphone is preferably used, and the optimal sound receiving angle is a small-range tapered area, so that the target sound signal can be picked up more accurately. For example, when it is desired to flexibly control the output volume of the speakers distributed throughout the vehicle according to the situation of the person in the cabin, the tapered area can be used to cover only one seat of the microphone, and in order to achieve better vocal pickup. The effect is that the microphone can be placed in a position in the compartment that is closer to the human mouth. In the implementation The microphone can be placed directly above each seat in the compartment, so that the best sound angle of the microphone is a cone area directly below it, and just covers the seat directly below it, so when someone in the compartment When speaking, the microphone directly above the seat can pick up the vocal signal from the person, and the microphone installed at other positions is less likely to pick up the vocal signal, so that the vocal source can be more accurately determined. .

S12. Set a volume influence value of each of the N car microphones according to the sound signal.

It should be noted that the volume influence value of the car microphone indicates the influence of the car microphone on the output volume of all the car speakers in the car, and affects the adjustment direction and the adjustment range of the output volume of a car speaker. The factor is the volume influence value of each car microphone in the car. The value range of the volume influence value is [-100, +100]. When the volume influence value is positive, it indicates that the output volume of the car speaker increases, and the negative value indicates The output volume is attenuated. A value of zero indicates that the output volume is constant, and the absolute value of the volume influence value is larger, and the corresponding increase or attenuation is larger, and vice versa.

S13. Calculate, according to a volume influence value of each of the N car microphones and an influence weight value of each of the car microphones on the mth car speakers of the M car speakers, calculate the mth car speaker Weighting the volume adjustment value to obtain a weighted volume adjustment value of each of the M car speakers; wherein the influence weight value is based on between each of the car microphones and the mth car speaker Distance determined; m is a positive integer less than or equal to M;

It should be noted that, in combination with the above, for one of the M car speakers, one aspect factor affecting the adjustment direction and the adjustment range of the output volume is the volume influence of each car microphone in the car. The value, however, is another factor that affects the direction and extent of adjustment of its output volume, which is the weight of each car microphone that affects the car speaker. For example, when vocal detection is required, for any one of the M car speakers, each car microphone that picks up a vocal signal in the car has an influence on the output volume of the car speaker, and, according to The horizontal distance of each microphone to the car speaker is different, and the weight of each microphone affects the output volume of the car speaker is different. The closer the car microphone is to the car speaker, the greater the weight of the car speaker's output volume. Big. Therefore, for any one of the M car speakers, a weighted volume adjustment value can be obtained by combining the above two factors, and the weighted volume adjustment value is based on the currently picked up sound of each car microphone in the car. In the case of a signal, the output volume of the car speaker needs to be adjusted by the amount of volume change. For example, in the current environment, the current volume setting of a certain car speaker is 50 scales, according to the current sound of each car microphone in the car. In the case of the signal, it is calculated that the weighted volume adjustment value of the on-board speaker is -20 scale, which means that the output volume of the on-board speaker needs to be attenuated by 20 scales, that is, the output volume needs to be adjusted to 30 scales.

Specifically, for the mth car speaker of the M car speakers, the weighted volume adjustment value is calculated as

Where V _mt is the weighted volume adjustment value of the mth car speaker, V _n is the volume influence value of the nth car microphone among the N car microphones, n is a positive integer less than or equal to N; P _nm is the nth The influence weight of the car microphone on the mth car speaker; K ₁ is the unit coefficient. For the determined m, the size of K ₁ is the sum of the n influence weight values in formula (1), for example, when m=1 , then K ₁ = P ₁₁ + P ₂₁ + P ₃₁ + ... + P _n1 .

It should be noted that when N car microphones and M car speakers in the car are installed, that is, after their relative positions are determined, respectively, the level of each of the N car microphones to the M car speakers is acquired. Distance, thereby, N·M horizontal distances can be measured, and then the influence weight value of the nth car microphone to M speakers is calculated according to the horizontal distance between the nth car microphone and the M speakers, n The positive integers in the interval [1, N] are sequentially taken to obtain an N × M weight matrix P. The P _nm described above is its matrix element, and P _nm represents N in the car microphone. The influence weight value of the nth car microphone on the mth car speaker among the M car speakers. In addition, the influence weight values of the nth car microphone on the M car speakers are inversely proportional to the horizontal distance between them, that is, the farther the horizontal distance between the two, the smaller the influence weight of the car microphone on the car speaker is. ,on the contrary.

Specifically, the calculation process of the weight matrix P is exemplified by the case where the total number of the in-vehicle microphones N=3 and the total number of the in-vehicle speakers M=6. First, the value of n is 1, and the first vehicle is acquired. The horizontal distances d ₁ , d ₂ , d ₃ , d ₄ , d ₅ and d ₆ from the microphone to the six car speakers, and the intermediate variable A is set.

Matrix element

m takes the values in the positive integers in the interval [1, M] in order to obtain the matrix elements of the first column of the weight matrix P: P ₁₁ , P ₁₂ , P ₁₃ , P ₁₄ , P ₁₅ , P ₁₆ , The matrix elements in the first column are the weights of the influence of the first microphone on the first, second, third, and sixth sixth car speakers. Similarly, the value of n is 2, which can be calculated. Obtaining matrix elements of the second column of the weight matrix P: P ₂₁ , P ₂₂ , P ₂₃ , P ₂₄ , P ₂₅ , P ₂₆ , and the matrix elements of the second column are respectively the first microphone pair The influence weight values of the 2nd, 3rd, 6th car speakers, and n are 3, and the matrix elements of the third column of the weight matrix P can be calculated: P ₃₁ , P ₃₂ , P ₃₃ , P ₃₄ , P ₃₅ , P ₃₆ , the matrix elements of the third column are respectively the weights of influence of the third microphone pair on the first, second, third ... sixth car speaker, thereby , the weight matrix P is:

S14. Adjust an output volume of the corresponding car speaker according to the weighted volume adjustment value of each of the car speakers.

In the embodiment of the present invention, the weighted volume adjustment value indicates the amount of change of the volume. For example, the weighted volume adjustment value of a certain car speaker is calculated to be -20 scale, and the current volume setting value of the car speaker is 50 scale. , means that the output volume of the car speaker needs to be attenuated by 20 scales, that is, the output volume of the car speaker needs to be adjusted to 30 scales.

Preferably, the step S12 includes:

When vocal detection is required, and at least one of the sound signals is detected to have the vocal signal, the volume influence value of the onboard microphone picked up to the vocal signal is set to a first preset value, and The volume influence value of the in-vehicle microphone that has not picked up the vocal signal is set to a second preset value.

Wherein, the vocal signal refers to an external vocal signal, that is, a sound signal emitted by a person in the vehicle, and if a person in the cabin speaks, the voice signal of the voice is detected as the vocal signal. However, if the vocal played in the car speaker does not belong to the vocal signal, for example, the car speaker is playing the radio, the car microphone records the radio signal of the radio, and when the vocal detection is performed, the radio person picked up by the car microphone The sound is not detected as the vocal signal.

In the embodiment of the present invention, the vocal detection can be implemented by the prior art. For example, when the vehicle microphone picks up the external vocal signal and also records the vocal played by the car speaker, the car speaker can be cancelled by an algorithm such as echo cancellation. The vocal being played is eliminated, leaving only external vocal signals for vocal detection.

In the embodiment of the present invention, when vocal detection is required, and it is detected that at least one in-vehicle microphone in the vehicle body picks up a vocal signal, whether the PDA signal is picked up by the car microphone will affect the volume influence value of the car microphone, and further Affecting the output volume of all the car speakers in the car. Specifically, the effect of the microphone that picks up the vocal signal on all the car speakers in the car is that the output volume of all the car speakers in the car is attenuated, while the microphone pair that does not pick up the vocal signal The output volume of all speakers in the compartment has no effect. In a specific implementation, the first preset value is -U, the second preset value is 0, U is a positive constant that is preset according to user requirements, and -U indicates that the output volume of the car speaker is attenuated by U units, and the volume is Use "scale" as the unit.

However, it should be noted that the volume influence value of the car microphone picked up to the vocal signal is -U, and for any one of the M car speakers, only one middle of the process of calculating the weighted volume adjustment value is performed. The parameter does not mean that the output volume of the car speaker is thus attenuated - U units, how much the output volume of the car speaker needs to be adjusted The units are determined by the volume influence value of each car microphone in the car and the weight of each car microphone affecting the car speaker.

Preferably, the step S12 further includes:

When it is required to perform vocal detection, and detecting that the vocal signal is not included in the sound signal, calculating, according to the noise signal in the sound signal picked up by each of the vehicle microphones, each of the vehicle microphones The volume affects the value.

It should be noted that when the microphone picks up the sound signal, one or a combination of any of a vocal signal, a noise signal, or other sound signal (such as a sound signal currently being played by the speaker) may be picked up. Wherein, the noise signal refers to characteristic background noise when the vehicle is running, such as tire noise, wind noise, and air conditioning noise.

In this embodiment, when the vocal detection is required, and it is detected that all the car microphones in the car do not pick up the vocal signal, the noise signal picked up by the car microphone will affect the volume influence value of the car microphone, thereby affecting the interior of the car. The output volume of all car speakers.

Further, the calculating, according to the noise signal in the sound signal of each of the vehicle-mounted microphones, the volume influence value of each of the vehicle-mounted microphones, specifically:

Obtaining, respectively, a noise signal strength in the sound signal picked up by each of the vehicle microphones;

Each noise signal strength is multiplied by an influence coefficient to obtain a volume influence value of each of the in-vehicle microphones; wherein the influence coefficient is determined by the intensity of the influence of the noise on the volume.

Specifically, when it is detected that none of the sound signals have the vocal signal, the calculation formula of the volume influence value of the nth car microphone of the N car microphones is:

V _n =Y _n *K ₂

Wherein, V _n is the n th volume affects the value of vehicle microphone, Y _n is the intensity of the noise signal n-th sound signal picked up by a microphone in the vehicle is, Y _n of the value interval [0,100]; K ₂ For the influence coefficient, the influence coefficient is a constant set by the user according to actual demand, indicating the degree of influence of noise on the output volume of the car speaker. The larger the influence coefficient is, the greater the influence of noise on the volume is, and the smaller the influence coefficient is. The smaller the influence of noise on the volume; since K ₂ is a constant, in actual cases, the larger the noise intensity Y _n is, the larger V _n is. specifically,

Where K ₃ is a unit coefficient, which has the same meaning as K ₁ described above, and the value is also the same as K ₁ ; U is a positive constant that is preset according to user requirements, and U represents a car speaker as described above. The output volume is increased by U units, and the volume is measured in "scale".

It should also be noted that, in the present embodiment, when it is required to perform vocal detection, and it is detected that all the car microphones in the vehicle do not pick up the vocal signal, for any one of the M car speakers, How many units of output volume need to be adjusted is determined by the volume influence value of each car microphone in the car and the weight of each car microphone affecting the car speaker.

Preferably, the step S12 includes:

When the vocal detection is not required, the volume influence value of each of the on-vehicle microphones is separately calculated according to the noise signal in the sound signal picked up by each of the on-vehicle microphones.

In the present embodiment, it is possible to set a situation in which vocal detection is not required according to user requirements, for example, the current vehicle speaker is playing a driving warning sound. In this case, the vocal detection is not performed, but the volume influence value of each car microphone is calculated according to the noise signal in the sound signal picked up by the microphone, that is, even if a phono signal is picked up by a certain car microphone, the person The sound signal also does not affect the volume influence value of the car microphone, and the noise signal picked up by the car microphone affects the volume influence value of the car microphone, thereby affecting the output volume of all the car speakers in the car.

Further, the calculating, according to the noise signal in the sound signal of each of the vehicle-mounted microphones, the volume influence value of each of the vehicle-mounted microphones, specifically:

Obtaining, respectively, a noise signal strength in the sound signal picked up by each of the vehicle microphones;

Each noise signal strength is multiplied by an influence coefficient to obtain a volume influence value of each of the in-vehicle microphones; wherein the influence coefficient is determined by the intensity of the influence of the noise on the volume.

Specifically, in the present embodiment, the method for calculating the volume influence value of the nth car microphone among the N car microphones and the above “when all the car microphones in the car have not picked up the vocal signal” The calculation method of the volume influence value of the n car microphones is the same, and will not be described here.

Preferably, after the step S11, before the step S12, the method further includes:

Detecting a type of the audio signal currently output by the M car speakers; wherein each type of the audio signal is pre-configured with vocal detection information corresponding thereto; the vocal detection information is used to determine whether vocal detection is required;

The vocal detection information configured according to the type of the currently outputted audio signal determines whether vocal detection is required.

Among them, in practical applications, various types of audio signals, such as multimedia sounds, driving warning sounds, and navigation sounds, can be played in the car speaker. Among them, multimedia sound refers to sounds such as music, radio and radio. The traffic warning sound refers to the sounds such as tire pressure alarm, water temperature alarm and door alarm. The navigation sound refers to the sound of the navigation broadcast of the car navigation system.

It should be noted that, in the present embodiment, the vocal detection information corresponding thereto is pre-configured for each type of audio signal, indicating whether vocal detection is performed when the car speaker currently plays this type of sound, for example, preset The vocal detection information of the fixed multimedia sound indicates that vocal detection is required, and when it is detected that the type of sound currently played by the on-board speaker is a multimedia sound, it is determined that vocal detection is required; and the vocal detection information indicating the driving warning sound is preset When the vocal detection is not required, when it is detected that the type of sound currently being played by the on-board speaker is a driving warning sound, it is determined that vocal detection is not required.

In this embodiment, when it is detected that the type of sound currently being played by the on-board speaker is a driving warning sound, It is determined that vocal detection is not required, and even if the car microphone detects the vocal signal in the car, the output volume of the car speaker is not lowered according to the vocal signal, so that the person in the car can hear the clear warning sound to make the car The inside person can take timely measures according to the driving warning sound to ensure the safety of driving.

Specifically, the step S14 specifically includes:

Calculating, respectively, a sum of the weighted volume adjustment value of each of the onboard speakers and a set volume value thereof to obtain a target volume value of each of the onboard speakers;

The output volume of each of the onboard speakers is adjusted to a corresponding target volume value.

It should be noted that for each car speaker, there is a set volume value, which is input by the user according to actual needs through a physical knob or a physical button in the in-vehicle device, which is only based on the user's Enter to change.

In the present embodiment, for a certain car speaker, the set volume value is 50 scales. If at some time, the vehicle microphone in the vehicle body picks up the vocal signal, and the vocal detection is required, and according to the interior of the vehicle. In the case of the sound signal picked up by the car microphone, it is calculated that the weighted volume adjustment value of the car speaker is -20 scale, and then the 50 scale and the -20 scale are added, and the target volume value of the car speaker is obtained as 30. Scale, the output volume of the car speaker can be adjusted from 50 to 30 scales. Then, if the situation of the sound signal picked up by the car microphone in the car is changed, the corresponding weighted volume adjustment value of the car speaker is changed. When it is -40 scale, the 50 scale and -40 scale are added, and the target volume value of the car speaker is 10 scales, and the output volume of the car speaker can be adjusted from 30 scales to 10 scales.

Preferably, the adjusting the output volume of each car speaker to the corresponding target volume value is specifically:

The output volume of each of the onboard speakers is gradually adjusted to a corresponding target volume value.

It should be noted that, for any one of the M car speakers, after obtaining the weighted volume adjustment value, the weighted volume adjustment value can be directly added to the set volume value, and the output volume is outputted at one time. Adjust to the target volume value, but in the case of a large weighted volume value, such adjustment method will be relatively blunt, so that the listener sounds very differently, and the human ear does not have a process of adaptation, which is easy for the human ear and Human psychology causes harm and the user experience is not good.

In the embodiment, after the weighted volume adjustment value of each car speaker is obtained, the output volume is subjected to numerical gradation processing, and a plurality of numerical gradation processing methods can be selected, for example, the volume setting value and weight of a certain car speaker. The volume adjustment values are 50 scale and -20 scale respectively, then you can set a gradient amount to 5 scales. According to this gradient amount, the output volume of the car speaker is adjusted from 50 to 45, and then adjusted to 45 by 45. The scale is adjusted from 40 to 35, until the output volume of the car speaker is adjusted to the target volume value of 30, and the adjustment task is completed.

In the embodiment, the output volume of the car speaker gradually changes to the target volume value, and the buffer adjustment is implemented by using the sound gradation method, and the control of the sound hopping is better realized, and the occurrence of the blasting sound can be suppressed, so that the sound sounds more. Natural, more pleasing to the ear, it is good for the health of the listener and improves the user experience.

Further, the gradually adjusting the output volume of each car speaker to the corresponding target volume value includes:

Obtaining a current output volume of each of the onboard speakers;

Calculating, respectively, a difference between a current output volume of each of the onboard speakers and a target volume value thereof;

Determining, respectively, whether an absolute value of a difference between a current output volume of each of the onboard speakers and a target volume value thereof satisfies a preset condition; wherein the preset condition is an absolute value of a difference between a current output volume of the onboard speaker and a target volume value thereof Less than a preset threshold;

For the onboard speaker that does not satisfy the preset condition, the current transition volume value is respectively calculated according to the preset time interval, and the calculation formula of the current transition volume value is: V0=V3+[V2-(V3-V1)] K; wherein V0 is the current transition volume value of the car speaker; V1 is the set volume value of the car speaker, V2 is the weighted volume adjustment value of the car speaker, and V3 is the current output of the car speaker Volume; K is the preset coefficient of variation, and K is a positive number less than one;

The output volume of each of the car speakers is adjusted to a corresponding current transition volume value.

Wherein, the magnitude of the coefficient of variation K affects the time required for the output volume of the car speaker to reach the target volume value. For any car speaker, the smaller the K value, the volume of the output is adjusted from the volume setting value to the target volume value. The longer it takes, the opposite.

In this embodiment, a preferred numerical gradation processing method is provided. The gradual manner provided in the embodiment is exemplified. For a certain car speaker, the set volume value and the weighted volume adjustment value are respectively 50 scales. And -20 scale, and the preset threshold is 0.1, the preset time interval is 50ms, and the preset variation coefficient is 1/10. The adjustment process of the output volume is as follows:

The first transition volume value is V0=50+[-20-(50-50)]*(1/10)=48, which is the first adjustment to adjust the output volume of the car speaker from 50 to 48. ;

After 50ms, calculate the second transition volume value as V0=48+[-20-(48-50)]*(1/10)=46.2 scale, which is the first time to adjust the output volume of the car speaker from 48 The scale is adjusted to 46.2 scale;

After another 50ms, calculate the third transition volume value as V0=46.2+[-20-(46.2-50)]*(1/10)=44.58, which is the first time to adjust the output volume of the car speaker. Adjusted from 46.2 scale to 44.58 scale;

And so on, until the absolute value of the difference between the current output volume of the on-board speaker and its target volume value is less than the preset threshold value of 0.1, the calculation of the transition volume value is stopped, and the task of adjusting the output volume is completed.

Preferably, the method further includes:

For the on-board speaker that satisfies the preset condition, its current transition volume value is set to its target volume value, respectively.

It should be noted that, in the foregoing embodiment, the last transition volume value calculated during the adjustment process may not be exactly equal to the target volume value, but is equal to a value that is very close to the target volume value, so that the adjustment error is brought. Therefore, in the embodiment, the method further includes a step of setting the transition volume value directly to the target volume value for the car speaker whose absolute difference between the current output volume and the target volume value is less than a preset threshold. In this case, you can ensure that the output volume is adjusted to the target volume value every time, which improves the accuracy of the adjustment.

Correspondingly, an aspect of the embodiment of the present invention further provides a volume control device for a vehicle-mounted speaker, which can implement all the processes in the volume control method of the vehicle-mounted speaker provided by one aspect of the embodiments of the present invention.

2 is a schematic structural diagram of an embodiment of a volume control device 10 for a vehicle-mounted speaker provided by the present invention. The volume control device 10 of the vehicle-mounted speaker includes:

The sound signal acquiring module 11 is configured to respectively acquire sound signals picked up by the N car microphones;

The volume influence value setting module 12 is configured to separately set a volume influence value of each of the N car microphones according to the sound signal;

The weighted volume adjustment value calculation module 13 is configured to calculate, according to a volume influence value of each of the N car microphones and an influence weight value of each of the car microphones on the mth car speaker in the M car speakers a weighted volume adjustment value of the mth car speaker to obtain a weighted volume adjustment value of each of the M car speakers; wherein the influence weight value is according to each of the car microphones and the The distance between the mth car speakers is determined; m is a positive integer less than or equal to M; and,

The output volume adjustment module 14 is configured to adjust an output volume of the corresponding car speaker according to the weighted volume adjustment value of each of the car speakers.

Preferably, the volume influence value setting module 12 includes:

a first volume influence value setting unit, configured to: when a vocal sound detection is required, and when at least one of the sound signals is detected to have the vocal signal, a volume effect of a car microphone that picks up the vocal signal The value is set to a first preset value, and a volume influence value of the in-vehicle microphone that has not been picked up to the vocal signal is set to a second preset value.

Preferably, the volume influence value setting module 12 further includes:

a second volume influence value setting unit, configured to detect noise in the sound signal picked up by each of the vehicle-mounted microphones when vocal sound detection is required, and when the vocal signal is not detected in the sound signal The signals respectively calculate the volume influence value of each of the in-vehicle microphones.

Further, the second volume influence value setting unit specifically includes:

a first noise intensity acquisition subunit, configured to acquire, in the sound signal picked up by each of the vehicle microphones, when the voice signal is detected and the voice signal is detected Noise signal strength;

a first volume influence value calculation subunit, configured to respectively multiply each noise signal strength by an influence coefficient to obtain a volume influence value of each of the onboard microphones; wherein the influence coefficient is an influence intensity of the noise on the volume To determine.

Preferably, the volume influence value setting module 12 includes:

And a third volume influence value setting unit configured to calculate, respectively, a volume influence value of each of the in-vehicle microphones according to a noise signal in the sound signal picked up by each of the in-vehicle microphones when the human voice detection is not required.

Further, the third volume influence value setting unit specifically includes:

a second noise intensity acquisition subunit, configured to respectively acquire a noise signal strength in the sound signal picked up by each of the vehicle microphones;

a second volume influence value calculation subunit, configured to respectively multiply each noise signal strength by an influence coefficient to obtain a volume influence value of each of the onboard microphones; wherein the influence coefficient is an influence intensity of the noise on the volume To determine.

Preferably, the volume control device 10 of the vehicle-mounted speaker further includes:

An audio type detecting module, configured to detect a type of an audio signal currently output by the M car speakers; wherein each type of the audio signal is pre-configured with a corresponding voice detection information; the voice detection information is used for determining Whether vocal testing is required; and,

The vocal detection requirement determination module is configured to determine whether vocal detection is required according to the vocal detection information configured by the type of the currently output audio signal.

Specifically, the output volume adjustment module 14 includes:

a target volume value obtaining unit, configured to separately calculate a sum of a weighted volume adjustment value of each of the onboard speakers and a set volume value thereof to obtain a target volume value of each of the onboard speakers, respectively;

And an output volume adjusting unit, configured to adjust an output volume of each of the car speakers to a corresponding target volume value.

Preferably, the output volume adjustment unit is specifically configured to:

The output volume of each of the onboard speakers is gradually adjusted to a corresponding target volume value.

Further, the output volume adjustment unit includes:

a current output volume acquisition subunit, configured to acquire a current output volume of each of the onboard speakers;

a difference calculation subunit, configured to separately calculate a difference between a current output volume of each of the onboard speakers and a target volume value thereof;

a preset condition determining subunit, configured to respectively determine whether an absolute value of a difference between a current output volume of each of the onboard speakers and a target volume value thereof satisfies a preset condition; wherein the preset condition is a current output volume of the onboard speaker The absolute value of the difference from the target volume value is less than a preset threshold;

The transition volume value calculation subunit is configured to calculate, for a car speaker that does not satisfy the preset condition, a current transition volume value according to a preset time interval, and the current transition volume value is calculated as: V0=V3+ [V2- (V3-V1)]·K; wherein, V0 is the current transition volume value of the car speaker; V1 is the set volume value of the car speaker, and V2 is the weighted volume adjustment value of the car speaker, and V3 is The current output volume of the car speaker; K is the preset coefficient of variation, K is a positive number less than 1;

And an output volume adjustment subunit, configured to respectively adjust an output volume of each of the onboard speakers to a corresponding current transition volume value.

Preferably, the device further comprises:

The transition volume value setting subunit, for the onboard speaker that satisfies the preset condition, respectively sets its current transition volume value to its target volume value.

Accordingly, the present invention also provides an embodiment of a volume control system for a car speaker.

Please refer to FIG. 3 , which is a schematic structural diagram of an embodiment of a volume control system for a vehicle-mounted speaker provided by the present invention. The volume control system of the vehicle-mounted speaker includes:

N car speakers 30, M car microphones 20, and a volume control device 10 for the car speakers provided in the above embodiments.

The method, device and system for controlling the volume of the vehicle-mounted speaker provided by the embodiment of the present invention acquire the sound signals picked up by each of the vehicle-mounted microphones respectively, and adjust the distribution weights according to the different influence weights of each of the vehicle-mounted microphones on the respective vehicle-mounted speakers. The output volume of the vehicle-mounted speaker in the vehicle compartment, wherein the influence weight is determined by the distance between the vehicle-mounted microphone and the vehicle-mounted speaker. It can be seen that the embodiment of the present invention can adjust the distribution according to the sound source position of the sound signal collected by the microphone. The output volume of the speakers throughout the compartment effectively improves the user experience.

One of ordinary skill in the art can understand that all or part of the process of implementing the foregoing embodiments can be completed by a computer program to instruct related hardware, and the program can be stored in a computer readable storage medium. When executed, the flow of an embodiment of the methods as described above may be included. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

The above is a preferred embodiment of the present invention, and it should be noted that those skilled in the art can also make several improvements and modifications without departing from the principles of the present invention. It is the scope of protection of the present invention.

Claims (15)

1. A volume control method for a vehicle-mounted speaker, characterized in that the method comprises:

   S11. Acquire sound signals picked up by N car microphones respectively;

   S12. Set a volume influence value of each of the N car microphones according to the sound signal.

   S13. Calculate, according to a volume influence value of each of the N car microphones and an influence weight value of each of the car microphones on the mth car speakers of the M car speakers, calculate the mth car speaker Weighting the volume adjustment value to obtain a weighted volume adjustment value of each of the M car speakers; wherein the influence weight value is based on between each of the car microphones and the mth car speaker Distance determined; m is a positive integer less than or equal to M;

   S14. Adjust an output volume of the corresponding car speaker according to the weighted volume adjustment value of each of the car speakers.
2. The volume control method of the vehicle-mounted speaker according to claim 1, wherein the step S12 comprises:

   When vocal detection is required, and at least one of the sound signals is detected to have the vocal signal, the volume influence value of the onboard microphone picked up to the vocal signal is set to a first preset value, and The volume influence value of the in-vehicle microphone that has not picked up the vocal signal is set to a second preset value.
3. The method of controlling the volume of the vehicle-mounted speaker according to claim 2, wherein the step S12 further comprises:

   When it is required to perform vocal detection, and detecting that the vocal signal is not included in the sound signal, calculating, according to the noise signal in the sound signal picked up by each of the vehicle microphones, each of the vehicle microphones The volume affects the value.
4. The volume control method of the vehicle-mounted speaker according to claim 1, wherein the step S12 comprises:

   When the vocal detection is not required, the volume influence value of each of the on-vehicle microphones is separately calculated according to the noise signal in the sound signal picked up by each of the on-vehicle microphones.
5. The volume control method for a vehicle-mounted speaker according to claim 3 or 4, wherein the sound volume influence value of each of the vehicle-mounted microphones is separately calculated according to a noise signal in the sound signal picked up by each of the vehicle-mounted microphones Specifically, including:

   Obtaining, respectively, a noise signal strength in the sound signal picked up by each of the vehicle microphones;

   Each noise signal strength is multiplied by an influence coefficient to obtain a volume influence value of each of the in-vehicle microphones; wherein the influence coefficient is determined by the intensity of the influence of the noise on the volume.
6. The method of controlling the volume of the vehicle-mounted speaker according to any one of claims 2 to 4, wherein after the step S11, before the step S12, the method further comprises:

   Detecting a type of the audio signal currently output by the M car speakers; wherein each type of the audio signal is pre-configured with vocal detection information corresponding thereto; the vocal detection information is used to determine whether vocal detection is required;

   The vocal detection information configured according to the type of the currently outputted audio signal determines whether vocal detection is required.
7. The method of controlling the volume of the vehicle-mounted speaker according to claim 1, wherein the step S14 specifically comprises:

   Calculating, respectively, a sum of the weighted volume adjustment value of each of the onboard speakers and a set volume value thereof to obtain a target volume value of each of the onboard speakers;

   The output volume of each of the onboard speakers is adjusted to a corresponding target volume value.
8. The volume control method for a vehicle-mounted speaker according to claim 7, wherein the adjusting the output volume of each of the vehicle-mounted speakers to a corresponding target volume value is specifically:

   The output volume of each of the onboard speakers is gradually adjusted to a corresponding target volume value.
9. The volume control method of the vehicle-mounted speaker according to claim 8, wherein the gradually adjusting the output volume of each of the on-board speakers to the corresponding target volume value comprises:

   Obtaining a current output volume of each of the onboard speakers;

   Calculating, respectively, a difference between a current output volume of each of the onboard speakers and a target volume value thereof;

   Determining, respectively, whether an absolute value of a difference between a current output volume of each of the onboard speakers and a target volume value thereof satisfies a preset condition; wherein the preset condition is an absolute value of a difference between a current output volume of the onboard speaker and a target volume value thereof Less than a preset threshold;

   For the onboard speaker that does not satisfy the preset condition, the current transition volume value is respectively calculated according to the preset time interval, and the calculation formula of the current transition volume value is: V0=V3+[V2-(V3-V1)] K; wherein V0 is the current transition volume value of the car speaker; V1 is the set volume value of the car speaker, V2 is the weighted volume adjustment value of the car speaker, and V3 is the current output of the car speaker Volume; K is the preset coefficient of variation, and K is a positive number less than one;

   The output volume of each of the car speakers is adjusted to a corresponding current transition volume value.
10. The method of controlling the volume of a vehicle-mounted speaker according to claim 9, wherein the method further comprises:

    For the on-board speaker that satisfies the preset condition, its current transition volume value is set to its target volume value, respectively.
11. A volume control device for a vehicle-mounted speaker, characterized in that the device comprises:

    a sound signal acquiring module, configured to respectively acquire sound signals picked up by the N car microphones;

    a volume influence value setting module, configured to respectively set a volume influence value of each of the N car microphones according to the sound signal;

    a weighted volume adjustment value calculation module, configured to calculate, according to a volume influence value of each of the N car microphones and an influence weight value of each of the car microphones on the mth car speaker of the M car speakers a weighted volume adjustment value of the mth car speaker to obtain a weighted volume adjustment value of each of the M car speakers; wherein the influence weight value is according to each of the car microphones and the first m is determined by the distance between the car speakers; m is a positive integer less than or equal to M; and,

    And an output volume adjustment module, configured to adjust an output volume of the corresponding car speaker according to the weighted volume adjustment value of each of the car speakers.
12. The volume control device for a vehicle-mounted speaker according to claim 11, wherein the volume influence value setting module comprises:

    a first volume influence value setting unit, configured to: when a vocal sound detection is required, and when at least one of the sound signals is detected to have the vocal signal, a volume effect of a car microphone that picks up the vocal signal The value is set to a first preset value, and a volume influence value of the in-vehicle microphone that has not been picked up to the vocal signal is set to a second preset value.
13. The volume control device for a vehicle-mounted speaker according to claim 12, wherein the volume influence value setting module further comprises:

    a second volume influence value setting unit, configured to detect noise in the sound signal picked up by each of the vehicle-mounted microphones when vocal sound detection is required, and when the vocal signal is not detected in the sound signal The signals respectively calculate the volume influence value of each of the in-vehicle microphones.
14. The volume control device for a vehicle-mounted speaker according to claim 11, wherein the volume influence value setting module comprises:

    And a third volume influence value setting unit configured to calculate, respectively, a volume influence value of each of the in-vehicle microphones according to a noise signal in the sound signal picked up by each of the in-vehicle microphones when the human voice detection is not required.
15. The volume control device for a vehicle-mounted speaker according to claim 11, wherein the output volume adjustment module comprises:

    a target volume value obtaining unit, configured to separately calculate a sum of a weighted volume adjustment value of each of the onboard speakers and a set volume value thereof to obtain a target volume value of each of the onboard speakers, respectively;

    And an output volume adjusting unit, configured to adjust an output volume of each of the car speakers to a corresponding target volume value.

Images