CN116033315A - Broadcast volume control method and system - Google Patents
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- CN116033315A CN116033315A CN202310323324.8A CN202310323324A CN116033315A CN 116033315 A CN116033315 A CN 116033315A CN 202310323324 A CN202310323324 A CN 202310323324A CN 116033315 A CN116033315 A CN 116033315A
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Abstract
The invention provides a broadcast volume control method and a system, wherein the method comprises the following steps: when a broadcasting instruction is received, acquiring a noise value in the current broadcasting environment, and calculating a first volume gain coefficient based on the noise value; measuring distance parameters of a loudspeaker and a crowd in the current playing environment, calculating corresponding distance gain parameters based on the distance parameters, and adjusting the first volume gain coefficient based on the distance gain parameters to obtain a second volume gain coefficient; and adjusting the volume of the loudspeaker based on the second volume gain coefficient, and broadcasting based on the adjusted volume. The initial volume value is adjusted in real time according to the external environment through the initial volume value when broadcasting is needed each time, so that the information is broadcast at a proper volume, and the information is broadcast at a proper volume on the basis of ensuring effective transmission.
Description
Technical Field
The present invention relates to the field of broadcasting technologies, and in particular, to a method and a system for controlling broadcast volume.
Background
In the current society, it is difficult to avoid contacting various types of sounds in daily life, including mall broadcasting, subway broadcasting, public place warning broadcasting, etc. However, the volume of these broadcasts is often affected by environmental noise, transmission range, and other factors, resulting in insufficient or excessive volume of the broadcast, which is not effective in conveying information.
For example, in a mall, when environmental noise is too loud or people are far away from the broadcast, if the broadcast sound is insufficient, people have difficulty in acquiring relevant information quickly and effectively; if in order to guarantee effective transmission of information, make the volume of broadcasting keep maximum value to report, when people are nearer to broadcast speaker, just current broadcast environment's noise is lower, people only need the report of appropriate volume can effectively acquire relevant information, and great volume can cause the influence to people's hearing, arouses the discomfort.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a broadcast volume control method and a system, and aims to solve the technical problems that in the prior art, the broadcast volume is often influenced by factors such as environmental noise, transmission range and the like, so that information transmission is not smooth or hearing of people is influenced.
In order to achieve the above object, the present invention is achieved by the following technical scheme: a broadcast volume control method is applied to mall broadcast reports and comprises the following steps:
when a broadcasting instruction is received, acquiring a noise value in the current broadcasting environment, and calculating a first volume gain coefficient based on the noise value; measuring distance parameters of a loudspeaker and a crowd in the current playing environment, calculating corresponding distance gain parameters based on the distance parameters, and adjusting the first volume gain coefficient based on the distance gain parameters to obtain a second volume gain coefficient; and adjusting the volume of the loudspeaker based on the second volume gain coefficient, and broadcasting based on the adjusted volume.
Compared with the prior art, the invention has the beneficial effects that: the method comprises the steps of obtaining a noise value under a current playing environment when a broadcasting instruction is received, calculating to obtain a first volume gain coefficient based on the noise value, measuring distance parameters of a loudspeaker and a crowd under the current playing environment, calculating to obtain a corresponding distance gain parameter based on the distance parameters, adjusting the first volume gain coefficient based on the distance parameters to obtain a second volume gain coefficient, and finally adjusting the volume of the loudspeaker based on the second gain coefficient to broadcast based on the adjusted volume.
According to an aspect of the foregoing technical solution, the step of obtaining the second volume gain coefficient specifically includes:
dividing the current playing area into a plurality of subareas, and setting a plurality of preset distance parameters based on the distance relation between each subarea and a loudspeaker;
and setting an infrared sensor in the subarea, screening out a plurality of effective distance parameters based on the sensing result of the infrared sensor, and calculating the distance gain parameters based on the effective distance parameters.
According to an aspect of the foregoing solution, before the step of obtaining the distance gain parameter, the method further includes:
adjusting each effective distance parameter based on crowd density coefficients in each subarea to obtain a plurality of adjustment distance parameters;
and calculating the distance gain parameter based on a plurality of the adjustment distance parameters.
According to an aspect of the above technical solution, effective sub-areas are screened out from the plurality of sub-areas based on the sensing result of the infrared sensor;
and acquiring an image picture of the effective subarea in the current environment, and obtaining the crowd density coefficient based on the image picture.
According to an aspect of the foregoing technical solution, the first volume gain coefficient is obtained by the following formula:
wherein K is the first volume gain coefficient, dBA is the equivalent A sound level value of noise.
According to an aspect of the foregoing technical solution, the step of adjusting the first volume gain coefficient based on the distance gain parameter to obtain the second volume gain coefficient specifically includes:
the second volume gain factor is obtained by the following formula:
in the method, in the process of the invention,
and K is the first volume gain coefficient, D is the distance gain parameter, M is the distance attenuation index, and P is the crowd density coefficient.
According to an aspect of the foregoing technical solution, the step of adjusting the volume of the speaker based on the second volume gain coefficient specifically includes:
in the method, in the process of the invention,
for the output level value of said loudspeaker, +.>
For the second volume gain factor, +.>
Is the input level value of the loudspeaker.
On the other hand, the invention also provides a broadcast volume control system, which comprises:
the noise module is used for acquiring a noise value in the current playing environment when receiving the broadcasting instruction, and calculating a first volume gain coefficient based on the noise value;
the distance module is used for measuring distance parameters of the loudspeaker and the crowd in the current playing environment, calculating corresponding distance gain parameters based on the distance parameters, and adjusting the first volume gain coefficient based on the distance gain parameters to obtain a second volume gain coefficient;
and the volume module is used for adjusting the volume of the loudspeaker based on the second volume gain coefficient and broadcasting based on the adjusted volume.
According to an aspect of the foregoing technical solution, the distance module specifically includes:
the partition unit is used for dividing the current playing area into a plurality of subareas and setting a plurality of preset distance parameters based on the distance relation between each subarea and the loudspeaker;
the measuring unit is used for setting infrared sensors in the subareas, screening out a plurality of effective distance parameters based on sensing results of the infrared sensors, and calculating the distance gain parameters based on the effective distance parameters.
According to an aspect of the foregoing technical solution, the measurement unit specifically includes:
the density subunit is used for adjusting each effective distance parameter based on the crowd density coefficient in each subarea to obtain a plurality of adjustment distance parameters;
and the measuring subunit is used for calculating the distance gain parameter based on a plurality of the adjustment distance parameters.
According to an aspect of the foregoing technical solution, the distance module further includes:
the screening unit is used for screening effective subareas from a plurality of subareas based on the sensing result of the infrared sensor;
and the density unit is used for acquiring the image picture of the effective subarea in the current environment and obtaining the crowd density coefficient based on the image picture.
According to an aspect of the foregoing technical solution, the noise module is specifically configured to:
the first volume gain factor is obtained by the following formula:
wherein K is the first volume gain coefficient, dBA is the equivalent A sound level value of noise.
According to an aspect of the foregoing technical solution, the distance module is specifically configured to:
the second volume gain factor is obtained by the following formula:
in the method, in the process of the invention,
and K is the first volume gain coefficient, D is the distance gain parameter, M is the distance attenuation index, and P is the crowd density coefficient.
According to an aspect of the foregoing technical solution, the volume module is specifically configured to:
adjusting the output level value of the speaker by the following formula:
in the method, in the process of the invention,
for the output level value of said loudspeaker, +.>
For the second volume gain factor, +.>
Is the input level value of the loudspeaker.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
fig. 1 is a flowchart of a broadcast volume control method according to a first embodiment of the present invention;
fig. 2 is a block diagram illustrating a broadcast volume control system according to a second embodiment of the present invention;
description of main reference numerals:
a noise module 100, a distance module 200, and a volume module 300.
The invention will be further described in the following detailed description in conjunction with the above-described figures.
Detailed Description
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. A number of embodiments of the invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "mounted" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 to 2, a broadcast volume control method according to a first embodiment of the present invention includes the following steps:
step S100, when a broadcasting instruction is received, a noise value in the current broadcasting environment is obtained, and a first volume gain coefficient is calculated based on the noise value.
Specifically, in this embodiment, the calculation formula of the first volume gain coefficient is as follows:
wherein K is the first volume gain coefficient, dBA is the equivalent A sound level value of noise. Specifically, the above-described noise value may be acquired by a noise sensor.
Preferably, in this embodiment, in the calculation process of the first volume gain coefficient, the calculation of the dBA value sets a wake-up threshold, and when the noise value is smaller than the threshold, the magnitude of dBA is not considered in the calculation of the volume gain, that is, the first volume gain coefficient K defaults to 1.
Specifically, in this embodiment, the step S200 specifically includes:
step S210, dividing the current playing area into a plurality of subareas, and setting a plurality of preset distance parameters based on the distance relation between each subarea and the loudspeaker; the preset distance parameter is set according to the size and shape of the playing area, the position and direction of the speaker, and the characteristics of sound transmission. Generally, the dividing manner of the playing area and the size of each sub-area can be determined according to the actual situation, and then the corresponding preset distance parameter is set based on the distance relation between each sub-area and the speaker. For example, the playing area may be divided into a plurality of rectangular or circular sub-areas, and corresponding preset distance parameters may be set for reference in calculating the distance gain parameters.
Step S220, setting infrared sensors in the subareas, screening out a plurality of effective distance parameters based on sensing results of the infrared sensors, and calculating the distance gain parameters based on the effective distance parameters. In some application scenarios of this embodiment, the infrared sensor is set to determine whether a person exists in the sub-area, so as to determine whether a preset distance parameter corresponding to the sub-area has a reference value, that is, whether the preset distance parameter is valid, and the effective distance parameter is selected through screening, and the required distance gain parameter can be obtained through a weighted average algorithm.
Step S230, adjusting each of the effective distance parameters based on the crowd density coefficient in each of the sub-regions, to obtain a plurality of adjusted distance parameters. In the area with higher crowd density, since more people are present, noise will increase, and accordingly, the broadcast volume needs to be increased to ensure the audibility of the broadcast, although the noise value has been measured in step S100 and the noise value itself is related to factors such as crowd density and speaker distance, the hearing experience situation in the current environment cannot be reflected completely accurately by only relying on the measured noise value, for example, even in the market area with the same two noise values, the difference in crowd density will affect the hearing experience. If the population density in an area is high, the communication sound and other noise between people increases, which further affects the audibility of the broadcast. Therefore, the broadcast volume needs to be adjusted timely according to the change of crowd density so as to ensure the hearing effect of the broadcast. In this embodiment, the process of adjusting the effective distance parameter based on the crowd density coefficient may be understood as adding based on the weighted average algorithm, where the difference is that the size and shape of the playing area, the position and direction of the speaker, and other related parameters are set in advance, and the crowd density value is dynamically changed. It can be appreciated that, because the volume control method is performed based on the reception of the broadcast command, the efficiency of data processing can be improved by setting the preset distance parameter, and in addition, the environment can be acquired and processed in advance according to the timed broadcast command, so that the timely transmission of information is ensured.
Preferably, in this embodiment, the step S230 specifically includes:
step S231, screening effective subareas from a plurality of subareas based on the sensing result of the infrared sensor;
step S232, obtaining an image picture of the effective subarea in the current environment, and obtaining the crowd density coefficient based on the image picture. In this step, the above-mentioned crowd density coefficient may be implemented by calculating the pixel density in the image, specifically by separating the background from the foreground through a background modeling algorithm, and then obtaining the crowd density coefficient by calculating the pixel density in the foreground image, or by identifying and counting the crowd, so as to obtain the crowd density coefficient, where the crowd density coefficient represents the influence degree of crowd density on volume.
The calculation formula of the crowd density coefficient P is as follows:
where P' is an original population density coefficient, W is a current population number (the number may be an estimated value), W is a reference population number (may be a preset fixed value), and k is a preset adjustment parameter. As will be appreciated, in the present embodiment, the range of values of k may be determined taking into account the following factors:
1. degree of attenuation of sound: the attenuation degree of sound may be different in different environments, so that the value range of k needs to be determined through experiments to adapt to the attenuation degree of sound in different environments.
2. Volume and sound quality of speaker: the volume and quality of the speaker also have an effect on the degree of sound attenuation, so the range of k values needs to be determined according to specific speaker parameters.
3. Crowd density and distribution: the crowd density and distribution also influence the sound attenuation degree, so that the value range of k needs to be determined through experiments to adapt to the sound attenuation degree under different density and distribution conditions.
It is easy to understand that a relative adjustment value can be obtained through practical testing and observation, for example, the crowd density coefficient is adjusted to be 1.2 or 1.5 in a region with higher crowd density, and the crowd density coefficient is adjusted to be 0.8 or 0.5 in a region with lower crowd density.
Step S240, calculating the distance gain parameter based on a plurality of the adjustment distance parameters.
In addition, in this embodiment, the step of adjusting the first volume gain coefficient based on the distance gain parameter to obtain the second volume gain coefficient specifically includes:
the second volume gain factor is obtained by the following formula:
wherein K' is the second volume gain coefficient, K is the first volume gain coefficient, D is the distance gain parameter, M is the distance decay index, and p is the crowd density coefficient. The distance attenuation index is used for describing the attenuation rule of the sound and can be used for calculating the attenuation amount of the sound in transmission.
And step S300, adjusting the volume of the loudspeaker based on the second volume gain coefficient, and broadcasting based on the adjusted volume.
Specifically, in this step, the step of adjusting the volume of the speaker based on the second volume gain coefficient specifically includes:
adjusting the output level value of the speaker by the following formula:
in the method, in the process of the invention,
for the output level value of said loudspeaker, +.>
For the second volume gain factor, +.>
Is the input level value of the loudspeaker. Specifically, the output level value of the above speaker may be specifically adjusted by setting an audio amplifier and based on the gain of the audio amplifier.
In summary, according to the broadcast volume control method in the above embodiment of the present invention, when a broadcast command is received, a noise value in a current playing environment is obtained, and a first volume gain coefficient is calculated based on the noise value, then a distance parameter between a speaker and a crowd in the current playing environment is measured, and a corresponding distance gain parameter is calculated based on the distance parameter, and meanwhile, the first volume gain coefficient is adjusted based on the distance parameter to obtain a second volume gain coefficient, and finally, the volume of the speaker is adjusted based on the second gain coefficient, so as to broadcast based on the adjusted volume.
A second embodiment of the present invention provides a broadcast volume control system, including a noise module 100, a distance module 200, and a volume module 300; the noise module 100 is configured to obtain a noise value in a current playing environment when receiving a broadcasting instruction, and calculate a first volume gain coefficient based on the noise value; the distance module 200 is configured to measure distance parameters of a speaker and a crowd in the current playing environment, calculate a corresponding distance gain parameter based on the distance parameters, and adjust the first volume gain coefficient based on the distance gain parameter to obtain a second volume gain coefficient; the volume module 300 is configured to adjust the volume of the speaker based on the second volume gain coefficient, and broadcast based on the adjusted volume.
Specifically, in the present embodiment, the noise module 100 is specifically configured to: the first volume gain factor is obtained by the following formula:
the method comprises the steps of carrying out a first treatment on the surface of the Wherein K is the first volume gain coefficient, dBA is the equivalent A sound level value of noise.
Preferably, in the present embodiment, the distance module 200 specifically includes a partition unit and a measurement unit; the partition unit is used for dividing the current playing area into a plurality of subareas and setting a plurality of preset distance parameters based on the distance relation between each subarea and the loudspeaker; the measuring unit is used for setting infrared sensors in the subareas, screening out a plurality of effective distance parameters based on sensing results of the infrared sensors, and calculating the distance gain parameters based on the effective distance parameters.
Specifically, in this embodiment, the measurement unit specifically includes a density subunit and a measurement subunit; the density subunit is used for adjusting each effective distance parameter based on the crowd density coefficient in each subarea to obtain a plurality of adjustment distance parameters; the measurement subunit is used for calculating the distance gain parameter based on a plurality of the adjustment distance parameters.
Specifically, in this embodiment, the distance module 200 further includes a screening unit and a density unit; the screening unit is used for screening effective subareas from a plurality of subareas based on the sensing result of the infrared sensor; the density unit is used for acquiring the image picture of the effective subarea in the current environment and obtaining the crowd density coefficient based on the image picture.
The distance module 200 is specifically configured to: the second volume gain factor is obtained by the following formula:
the method comprises the steps of carrying out a first treatment on the surface of the In (1) the->
And K is the first volume gain coefficient, D is the distance gain parameter, M is the distance attenuation index, and P is the crowd density coefficient.
Further, in this embodiment, the volume module 300 is specifically configured to: adjusting the output level value of the speaker by the following formula:
the method comprises the steps of carrying out a first treatment on the surface of the In (1) the->
For the output level value of said loudspeaker, +.>
For the second volume gain factor, +.>
Is the input level value of the loudspeaker.
In summary, in the broadcast volume control system in this embodiment, when a broadcast command is received, a noise value in a current playing environment is obtained, a first volume gain coefficient is calculated based on the noise value, then a distance parameter between a speaker and a crowd in the current playing environment is measured, a corresponding distance gain parameter is calculated based on the distance parameter, meanwhile, the first volume gain coefficient is adjusted based on the distance parameter to obtain a second volume gain coefficient, finally, the volume of the speaker is adjusted based on the second gain coefficient, so as to broadcast based on the adjusted volume, and it is understood that the initial volume value of the speaker can be set based on the calculation mode of the volume gain coefficient, the noise size and the distance attenuation degree of the crowd can be increased based on the minimum volume value, the noise size and the distance attenuation degree of the crowd can be reduced based on the maximum volume value, the initial volume value is adjusted in real time according to the external environment when broadcasting is required, so that the volume is properly broadcast, and the volume is properly transmitted on the basis of guaranteeing that information is effectively transmitted.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that various modifications and improvements can be made by those skilled in the art without departing from the spirit of the invention, which falls within the scope of the present invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. The broadcast volume control method is applied to market broadcast broadcasting and is characterized by comprising the following steps:
when a broadcasting instruction is received, acquiring a noise value in the current broadcasting environment, and calculating a first volume gain coefficient based on the noise value;
measuring distance parameters of a loudspeaker and a crowd in the current playing environment, calculating corresponding distance gain parameters based on the distance parameters, and adjusting the first volume gain coefficient based on the distance gain parameters to obtain a second volume gain coefficient;
and adjusting the volume of the loudspeaker based on the second volume gain coefficient, and broadcasting based on the adjusted volume.
2. The broadcast volume control method of claim 1, wherein the step of obtaining the second volume gain factor comprises:
dividing the current playing area into a plurality of subareas, and setting a plurality of preset distance parameters based on the distance relation between each subarea and a loudspeaker;
and setting an infrared sensor in the subarea, screening out a plurality of effective distance parameters based on the sensing result of the infrared sensor, and calculating the distance gain parameters based on the effective distance parameters.
3. The broadcast volume control method of claim 2, wherein prior to the step of obtaining the distance gain parameter, the method further comprises:
adjusting each effective distance parameter based on crowd density coefficients in each subarea to obtain a plurality of adjustment distance parameters;
and calculating the distance gain parameter based on a plurality of the adjustment distance parameters.
4. A broadcast volume control method as claimed in claim 3, wherein the method further comprises:
screening effective subareas from a plurality of subareas based on the sensing result of the infrared sensor;
and acquiring an image picture of the effective subarea in the current environment, and obtaining the crowd density coefficient based on the image picture.
5. The broadcast volume control method of claim 1, wherein the step of calculating a first volume gain factor based on the noise value comprises:
the first volume gain factor is obtained by the following formula:
wherein K is the first volume gain coefficient, dBA is the equivalent A sound level value of noise.
6. The broadcast volume control method of claim 3, wherein the step of adjusting the first volume gain factor based on the distance gain parameter to obtain a second volume gain factor comprises:
the second volume gain factor is obtained by the following formula:
in the method, in the process of the invention,
and K is the first volume gain coefficient, D is the distance gain parameter, M is the distance attenuation index, and P is the crowd density coefficient.
7. The broadcast volume control method according to claim 1, wherein the step of adjusting the volume of the speaker based on the second volume gain factor specifically comprises:
adjusting the output level value of the speaker by the following formula:
in the method, in the process of the invention,
for the output level value of said loudspeaker, +.>
For the second volume gain factor, +.>
Is the input level value of the loudspeaker.
8. A broadcast volume control system, comprising:
the noise module is used for acquiring a noise value in the current playing environment when receiving the broadcasting instruction, and calculating a first volume gain coefficient based on the noise value;
the distance module is used for measuring distance parameters of the loudspeaker and the crowd in the current playing environment, calculating corresponding distance gain parameters based on the distance parameters, and adjusting the first volume gain coefficient based on the distance gain parameters to obtain a second volume gain coefficient;
and the volume module is used for adjusting the volume of the loudspeaker based on the second volume gain coefficient and broadcasting based on the adjusted volume.
9. The broadcast volume control system of claim 8, wherein the distance module specifically comprises:
the partition unit is used for dividing the current playing area into a plurality of subareas and setting a plurality of preset distance parameters based on the distance relation between each subarea and the loudspeaker;
the measuring unit is used for setting infrared sensors in the subareas, screening out a plurality of effective distance parameters based on sensing results of the infrared sensors, and calculating the distance gain parameters based on the effective distance parameters.
10. The broadcast volume control system of claim 9, wherein the measurement unit specifically comprises:
the density subunit is used for adjusting each effective distance parameter based on the crowd density coefficient in each subarea to obtain a plurality of adjustment distance parameters;
and the measuring subunit is used for calculating the distance gain parameter based on a plurality of the adjustment distance parameters.
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| CHRISTOPH BOEHM: "Effective metric-based speaker segmentation in the frequency domain", 2009 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH AND SIGNAL PROCESSING * |
| 王仲园;金荣洪;耿军平;: "城市移动数字电视地面广播的信道噪声模型", 电子学报, no. 05 * |
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