CN111988721A - Sound amplification method, device, system, medium and equipment - Google Patents
Sound amplification method, device, system, medium and equipment Download PDFInfo
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Abstract
The invention relates to a sound amplifying method, device, system, medium and equipment. Wherein, can utilize bluetooth headset and interactive smart tablet to realize the public address. The interactive intelligent tablet can acquire digital audio signals corresponding to audio collected by the Bluetooth headset successfully paired through the built-in microphone, convert the digital audio signals into analog audio signals, amplify and output the analog audio signals, and accordingly amplification is achieved. That is, need not to dispose the microphone for everyone alone, consider bluetooth headset's popularity, can combine individual original bluetooth headset, realize that the built-in microphone function of bluetooth headset is multiplexing, when guaranteeing that bluetooth headset special messenger is dedicated, reduce the public address cost to reduce the equipment management degree of difficulty. Meanwhile, the public address can be realized based on the interactive intelligent panel, a power amplifier, a loudspeaker, various cables and the like do not need to be additionally arranged, the public address function multiplexing of the interactive intelligent panel is realized, and the complexity of the public address realization is reduced.
Description
Technical Field
The invention relates to the technical field of computer internet, in particular to a sound amplification method, a device, a system, a medium and equipment.
Background
This section is intended to provide a background or context to the embodiments of the invention that are recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.
By amplified is meant that the audio signal is amplified so that a clear sound can be heard by a live listener. In order to effectively protect the voice of a teacher, sound amplification is indispensable in the teaching process. Public address (can simply be write as teaching public address) in the teaching process is generally realized through handheld wired microphone, perhaps wears wireless microphone, and present teaching public address scheme mainly includes following four kinds:
according to the first scheme, a handheld fixed frequency point FM (frequency modulation) wireless microphone is used for sound amplification;
secondly, amplifying sound by using a frequency shift type sound amplifying system (mostly adopting a high-sensitivity interface microphone, belonging to wired microphone sound pickup and amplification);
thirdly, amplifying the sound by using an infrared microphone special for teaching;
and fourthly, amplifying by using a 2.4G wireless technology microphone.
The concept of "one microphone for one teacher" appears in schools and education circles for a long time to avoid cross infection caused by sharing of microphones and improve the convenience of microphone use. "teacher-microphone" is a mode in which each teacher has a microphone dedicated to him and each teacher uses its own microphone independently.
However, the idea of 'one teacher and one microphone' is created, which results in that the number of microphones required for teaching and sound amplification is greatly increased, the microphone management difficulty is increased, and the teaching and sound amplification cost is increased. In addition, when teaching public address is realized by holding a wired microphone in a hand or wearing a wireless microphone at present, a power amplifier, a loudspeaker, various cables and the like need to be deployed besides the microphone, and the realization is relatively complex.
Disclosure of Invention
The embodiment of the invention provides a public address method, a device, a system, a medium and equipment, which are used for solving the problems of complex realization and high cost of teaching public address.
In a first aspect, the present invention provides a sound amplifying method, which is applied to an interactive smart tablet, and includes:
acquiring a digital audio signal corresponding to audio collected by the Bluetooth headset successfully paired through the built-in microphone;
converting the digital audio signal to an analog audio signal;
and performing power amplification on the analog audio signal, and outputting the analog audio signal obtained after the power amplification.
Optionally, the method further includes:
determining attenuation information of the output analog audio signal obtained after power amplification;
determining the power corresponding to the analog audio signal subjected to power amplification according to the attenuation information;
at this time, power-amplifying the analog audio signal includes:
and amplifying the power of the analog audio signal in the analog audio signal.
Optionally, determining attenuation information of the output analog audio signal obtained after power amplification, and determining the power corresponding to the analog audio signal subjected to power amplification according to the attenuation information includes:
executing every set time length:
determining attenuation information of the output analog audio signal obtained after power amplification;
and determining the power corresponding to the analog audio signal subjected to power amplification according to the attenuation information.
Optionally, determining attenuation information of the output analog audio signal obtained after power amplification, and determining the power corresponding to the analog audio signal subjected to power amplification according to the attenuation information includes:
when the second audio intensity is greater than the first audio intensity, reducing the power corresponding to a second analog audio signal which is separated from the acquired analog audio signal and is subjected to power amplification until the second audio intensity is less than the first audio intensity;
wherein the first audio intensity is the audio intensity of a first analog audio signal that is tapped from an acquired analog audio signal, and the sum of the power of the first analog audio signal and the power of the second analog audio signal is the power of the acquired analog audio signal; the second audio intensity is an audio intensity of the output analog audio signal.
Optionally, after converting the digital audio signal into an analog audio signal and before performing power amplification on the analog audio signal, the method further includes:
synthesizing the analog audio signal with an analog audio signal corresponding to an audio and video file played in the interactive intelligent tablet;
power amplifying the analog audio signal, comprising:
and carrying out power amplification on the synthesized analog audio signal.
Optionally, performing power amplification on the analog audio signal includes:
determining a corresponding power amplification mode according to the required sound effect;
and performing power amplification on the analog audio signal according to the determined power amplification mode.
Optionally, acquiring a digital audio signal corresponding to an audio collected by the bluetooth headset successfully paired through the built-in microphone includes:
and acquiring a digital audio signal corresponding to the audio collected by the built-in microphone of the successfully paired Bluetooth headset by adopting a master mode Bluetooth protocol.
In a second aspect, the present invention further provides a public address system, where the system includes a bluetooth headset and an interactive smart tablet, where:
the Bluetooth headset is used for acquiring an analog audio signal through a built-in microphone, converting the analog audio signal into a digital audio signal and sending the digital audio signal;
the interactive intelligent tablet is used for acquiring the digital audio signal, converting the digital audio signal into an analog audio signal, performing power amplification on the analog audio signal, and outputting the analog audio signal obtained after the power amplification.
In a third aspect, the present invention further provides an interactive smart tablet, including:
the Bluetooth protocol processing module is used for acquiring a digital audio signal corresponding to the audio collected by the Bluetooth headset successfully paired through the built-in microphone and converting the digital audio signal into an analog audio signal;
the power amplification module is used for carrying out power amplification on the analog audio signal;
and the playing module is used for outputting the analog audio signal obtained after the power amplification is carried out by the power amplification module.
Optionally, the interactive smart tablet further includes a smart audio distribution module:
the intelligent audio distribution module is used for determining the attenuation information of the output analog audio signal obtained after power amplification; determining the power corresponding to the analog audio signal subjected to power amplification according to the attenuation information;
the power amplification module is specifically configured to perform power amplification on the analog audio signal with the power in the analog audio signal.
Optionally, the intelligent audio distribution module is specifically configured to execute at intervals of a set duration:
determining attenuation information of the output analog audio signal obtained after power amplification;
and determining the power corresponding to the analog audio signal subjected to power amplification according to the attenuation information.
Optionally, the intelligent audio distribution module is specifically configured to, when the second audio intensity is greater than the first audio intensity, reduce power corresponding to a second analog audio signal that is split from the acquired analog audio signal and performs power amplification until the second audio intensity is less than the first audio intensity;
wherein the first audio intensity is the audio intensity of a first analog audio signal that is tapped from an acquired analog audio signal, and the sum of the power of the first analog audio signal and the power of the second analog audio signal is the power of the acquired analog audio signal; the second audio intensity is an audio intensity of the output analog audio signal.
Optionally, the interactive smart tablet further includes an audio synthesis module:
the audio synthesis module is used for synthesizing the analog audio signal and an analog audio signal corresponding to an audio and video file played in the interactive intelligent tablet;
and the power amplification module is specifically used for carrying out power amplification on the synthesized analog audio signal.
Optionally, the interactive smart tablet further includes an audio mode switching module:
the audio mode switching module is used for determining a corresponding power amplification mode according to the required sound effect;
and the power amplification module is specifically used for carrying out power amplification on the analog audio signal according to the determined power amplification mode.
Optionally, the bluetooth protocol processing module is configured to obtain a digital audio signal corresponding to an audio collected by a built-in microphone of a successfully paired bluetooth headset, and includes:
and acquiring a digital audio signal corresponding to the audio collected by the built-in microphone of the successfully paired Bluetooth headset by adopting a master mode Bluetooth protocol.
In a fourth aspect, the present invention also provides a non-volatile computer storage medium storing an executable program for execution by a processor to implement the method as described above.
In a fifth aspect, the present invention further provides a block chain data processing device, including a processor, a communication interface, a memory, and a communication bus, where the processor, the communication interface, and the memory complete communication with each other through the communication bus;
the memory is used for storing a computer program;
the processor, when executing the program stored in the memory, is configured to implement the method steps as described above.
According to the scheme provided by the embodiment of the invention, the sound amplification can be realized by using the Bluetooth headset and the interactive intelligent panel. The interactive intelligent tablet can acquire digital audio signals corresponding to audio collected by the Bluetooth headset successfully paired through the built-in microphone, convert the digital audio signals into analog audio signals, amplify and output the analog audio signals, and accordingly amplification is achieved. That is, need not to dispose the microphone for everyone alone, consider bluetooth headset's popularity, can combine individual original bluetooth headset, realize that the built-in microphone function of bluetooth headset is multiplexing, when guaranteeing that bluetooth headset special messenger is dedicated, reduce the public address cost to reduce the equipment management degree of difficulty. Meanwhile, the public address can be realized based on the interactive intelligent panel, a power amplifier, a loudspeaker, various cables and the like do not need to be additionally arranged, the public address function multiplexing of the interactive intelligent panel is realized, and the complexity of the public address realization is reduced.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart of a sound amplifying method according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of power adjustment provided by an embodiment of the present invention;
fig. 3 is a schematic flow chart of a sound amplifying method according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an interactive smart tablet according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a bluetooth headset according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a sound amplifying system according to an embodiment of the present invention;
fig. 7 is a flowchart illustrating a sound amplifying method according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a sound amplifying apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, the "plurality" or "a plurality" mentioned herein means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
The terms "first," "second," and the like in the description and in the claims, and in the drawings described above, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein.
Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
An Interactive Intelligent Panel (IIP) is an integrated device that implements a human-computer Interactive operation by controlling contents displayed on a display Panel (e.g., a liquid crystal display Panel (LCD), a Light Emitting Diode (LED) display Panel, a Plasma Display Panel (PDP), etc.) through a touch technology. The interactive smart tablet can be widely applied to various fields, such as teaching, meeting, showing and the like.
The hardware part of the interactive intelligent tablet can comprise a touch positioning recognition system, a display system, a network system, an intelligent processing system and the like, which are combined together by an integral structural member and supported by a special software system. When a user touches a certain point on the display panel by a finger or a passive pen, the touch positioning identification system positions the coordinates of the point, controls the intelligent processing system to respond to the operation of the user, and realizes different functional applications through software built in the intelligent processing system.
It should be noted that the interactive smart tablet may generally include an Open Pluggable Specification (OPS) module to implement related functions under the Windows operating system. OPS is a standardized digital signage interface specification established by intel and display manufacturers. The OPS is composed of an X86 mini PC, an Intel core processor, a memory, a hard disk, various input/output interfaces and a Windows operation interface, and the size of the OPS is generally 200mm X119 mm X30 mm.
The scheme provided by each embodiment of the invention can be suitable for teaching scenes. The public address can be realized by utilizing the original interactive intelligent panel and the Bluetooth headset in the teaching scene. Of course, the sound amplification scheme provided by the embodiment of the invention is not only suitable for teaching scenes, but also suitable for other scenes with interactive intelligent tablets, such as meeting scenes.
Based on the above description, an embodiment of the present invention provides a sound amplifying method, where the method is applied to an interactive smart tablet, and a flow of steps of the method may be as shown in fig. 1, where the method includes:
step 101, the interactive intelligent tablet acquires a digital audio signal corresponding to an audio collected by the Bluetooth headset successfully paired through the built-in microphone.
In this embodiment, the audio directly acquired by the bluetooth headset through the built-in microphone is amplified, so in this step, the interactive smart tablet may obtain a digital audio signal corresponding to the audio acquired by the bluetooth headset successfully paired through the built-in microphone.
Step 102, the interactive intelligent tablet converts the digital audio signal into an analog audio signal.
In this step, in order to realize public address, the interactive smart tablet may convert a digital audio signal acquired from the bluetooth headset into an analog audio signal.
It should be noted that, because the bluetooth headset uses the slave mode bluetooth protocol, it can be understood that the bluetooth headset works in the slave device mode, and can only be searched by the bluetooth device working in the master device mode, and paired with the bluetooth device and establish a connection, in this embodiment, the interactive smart tablet uses the master mode bluetooth protocol and works in the master device mode.
In the master device mode, the interactive smart tablet can search peripheral Bluetooth devices, select Bluetooth devices which need to be connected and work in the slave device mode to be paired and connected, and then pair and establish connection with the Bluetooth headset.
That is to say, the interactive smart tablet can embed a bluetooth protocol, adopt the master mode in the mode, pair with a bluetooth headset embedded with a slave mode bluetooth protocol, directly extract a digital audio signal from a bluetooth protocol stack, and then can obtain a corresponding analog audio signal. Namely, the interactive smart tablet can acquire the digital audio signal corresponding to the audio collected by the built-in microphone through the successfully paired bluetooth headset by adopting a master mode bluetooth protocol.
It should be noted that, in this embodiment, the digital audio signal extracted from the bluetooth protocol stack does not need to be processed by the central processing unit, and the analog audio signal can be obtained only through digital-to-analog conversion, so that the delay for obtaining the analog audio signal corresponding to the bluetooth headset is effectively reduced, and the delay can reach several milliseconds, thereby effectively reducing the amplification delay and improving the user experience. That is to say, interactive intelligence is dull and stereotyped can acquire the analog audio signal that bluetooth headset corresponds fast, reduces the public address time delay, avoids appearing the phenomenon of sound asynchronization behind the primary sound and the public address.
And 103, performing power amplification on the analog audio signal by the interactive intelligent panel, and outputting the analog audio signal obtained after the power amplification.
In this step, the interactive intelligent tablet can utilize original public address function, carry out power amplification to the analog audio signal who acquires to the analog audio signal who obtains after the output carries out power amplification realizes the public address to the audio frequency that bluetooth headset gathered through built-in microphone.
It should be noted that, the inventor of the present invention further researches and discovers that, after the interactive smart tablet amplifies the audio collected by the microphone of the bluetooth headset, an acoustic echo may be generated in the microphone of the bluetooth headset, which may interfere with the audio collected by the microphone of the bluetooth headset, and an echo reverberation, or even a howling phenomenon, may be generated in the microphone of the bluetooth headset.
The acoustic echo is a phenomenon that after being collected by a microphone of the Bluetooth headset, the voice of a user is amplified by the interactive intelligent panel, and then is transmitted back to the microphone of the Bluetooth headset through air or other propagation media, so that echo is generated in the microphone of the Bluetooth headset. When the audio intensity of the amplified audio returned to the microphone of the bluetooth headset is relatively high, the acoustic echo is relatively obvious.
Therefore, in the process executed in step 103, the power of the analog audio signal subjected to power amplification may also be adjusted according to the attenuation condition of the analog audio signal obtained by amplifying the sound, so as to reduce the acoustic echo generated in the microphone of the bluetooth headset and reduce the interference of the analog audio signal obtained by amplifying the sound to the microphone of the bluetooth headset.
That is, in this embodiment, the severity of interference to the microphone of the bluetooth headset may be determined according to the attenuation condition of the analog audio signal obtained by amplifying the sound, and then the power of the analog audio signal subjected to power amplification may be adjusted.
In this step, attenuation information of the output analog audio signal obtained by performing power amplification may be further determined, and the power corresponding to the analog audio signal subjected to power amplification may be determined according to the attenuation information. In this case, the analog audio signal may be power-amplified according to the determined power, that is, the analog audio signal of the determined power among the analog audio signals may be power-amplified.
Considering that the position of the bluetooth headset may change greatly, the power of the power-amplified analog audio signal may be continuously dynamically adjusted, for example, the power of the power-amplified analog audio signal is dynamically adjusted at regular time, so that the power of the power-amplified analog audio signal is amplified according to the power of the dynamically-adjusted power-amplified analog audio signal, and the position change of the bluetooth headset may be better adapted.
At this time, it is understood that: determining attenuation information of the output analog audio signal obtained after power amplification, and determining the power corresponding to the analog audio signal subjected to power amplification according to the attenuation information. And after the power is determined each time, performing power amplification on the analog audio signal of the determined power in the analog audio signals.
The power amplification is performed on the analog audio signal with the determined power in the analog audio signal, which can be understood as selecting a part of the analog audio signal in the analog audio signal to perform power amplification, where the power of the part of the analog audio signal is the same as the determined power.
In this embodiment, the initial power value corresponding to the analog audio signal for power amplification may be set as needed.
Further, in a possible implementation manner, determining attenuation information of the output analog audio signal obtained after power amplification, and determining, according to the attenuation information, a power corresponding to the analog audio signal subjected to power amplification may include:
when the second audio intensity is greater than the first audio intensity, reducing the power corresponding to a second analog audio signal which is separated from the acquired analog audio signal and is subjected to power amplification until the second audio intensity is less than the first audio intensity;
wherein the first audio intensity is the audio intensity of a first analog audio signal that is tapped from an acquired analog audio signal, and the sum of the power of the first analog audio signal and the power of the second analog audio signal is the power of the acquired analog audio signal; the second audio intensity is an audio intensity of the output analog audio signal.
That is, as shown in fig. 2, the interactive smart tablet may split the analog audio signal obtained in step 102 into two analog audio signals. One of the paths is power amplified and output, and after output, the audio intensity of the output analog audio signal is determined, and the audio intensity (the second audio intensity, which may be denoted as W2) is compared with the audio intensity (the first audio intensity, which may be denoted as W1) of the other path of analog audio signal.
If the second audio intensity is greater than the first audio intensity, it is considered that the output analog audio signal is attenuated but the audio intensity is still greater, which may cause greater interference to the microphone of the bluetooth headset, and at this time, the power of the power amplified analog audio signal needs to be reduced.
If the second audio intensity is not greater than the first audio intensity, the output analog audio signal is considered to be attenuated, the audio intensity is low, large interference can not be generated on a microphone of the Bluetooth headset, and the power of the analog audio signal for power amplification does not need to be adjusted.
The power initial value of the two divided analog audio signals can be set at will. In a possible implementation manner, the power initial values of the two branched analog audio signals may be half of the power of the analog audio signal obtained in step 102, so as to ensure that a large sound amplification effect is generated as much as possible, and avoid echo, reverberation and howling phenomena.
In a possible implementation manner, voice recognition may be performed on the analog audio signal corresponding to the first audio intensity, and a corresponding operation is executed according to a voice recognition result, so as to realize intelligent recognition and response of the audio collected by the bluetooth headset.
In addition, in this step, the power amplifying the analog audio signal may include: determining a corresponding power amplification mode according to the required sound effect; and performing power amplification on the analog audio signal according to the determined power amplification mode. For example, when the required sound effect is a 2.0 sound effect, a corresponding power amplification mode may be determined, and the analog audio signal may be power-amplified according to the determined power amplification mode. For another example, when the required sound effect is 2.1 sound effect, the corresponding power amplification mode may be determined, and the analog audio signal may be power-amplified according to the determined power amplification mode.
In addition, it should be noted that the original public address function of the interactive smart tablet can be realized together with the public address function of the audio collected by the bluetooth headset, so that the synchronous output of two audio frequencies is realized.
In a possible implementation manner, after step 102 and before step 103, the analog audio signal obtained in step 102 and the analog audio signal corresponding to the audio/video file played in the interactive smart tablet may be synthesized. At this time, in step 103, power amplification may be performed on the synthesized analog audio signal, so as to synchronously implement power amplification on the analog audio signal corresponding to the bluetooth headset and the analog audio signal corresponding to the interactive smart tablet.
From the bluetooth headset side, the embodiment of the present invention further provides a method for amplifying sound, where the flow of the steps of the method may be as shown in fig. 3, and the method includes:
step 201, the bluetooth headset collects analog audio signals through a built-in microphone and converts the analog audio signals into digital audio signals.
Step 202, the bluetooth headset sends a digital audio signal so that the successfully paired interactive intelligent tablet can obtain the digital audio signal, convert the digital audio signal into an analog audio signal, perform power amplification on the analog audio signal, and output the analog audio signal obtained after the power amplification.
Corresponding to the provided method, the following apparatus is further provided.
The embodiment of the present invention provides an interactive smart tablet, which may have a structure as shown in fig. 4, and includes a bluetooth protocol processing module 11, a power amplifier module 12, and a playing module 13, where:
the bluetooth protocol processing module 11 is configured to obtain a digital audio signal corresponding to an audio collected by a built-in microphone of a successfully paired bluetooth headset, and convert the digital audio signal into an analog audio signal;
the power amplification module 12 is configured to perform power amplification on the analog audio signal;
the playing module 13 is configured to output an analog audio signal obtained by performing power amplification by the power amplification module.
In one possible implementation, the interactive smart tablet further includes a smart audio distribution module 14:
the intelligent audio distribution module 14 is configured to determine attenuation information of the output analog audio signal obtained after power amplification; determining the power corresponding to the analog audio signal subjected to power amplification according to the attenuation information;
the power amplifier module 12 is specifically configured to perform power amplification on the analog audio signal with the power in the analog audio signal.
Further, in a possible implementation manner, the intelligent audio allocation module 14 is specifically configured to execute, every set time interval:
determining attenuation information of the output analog audio signal obtained after power amplification;
and determining the power corresponding to the analog audio signal subjected to power amplification according to the attenuation information.
Further, in a possible implementation manner, the intelligent audio distribution module 14 is specifically configured to, when the second audio intensity is greater than the first audio intensity, reduce the power corresponding to the second analog audio signal that is split from the acquired analog audio signal and performs power amplification until the second audio intensity is less than the first audio intensity;
wherein the first audio intensity is the audio intensity of a first analog audio signal that is tapped from an acquired analog audio signal, and the sum of the power of the first analog audio signal and the power of the second analog audio signal is the power of the acquired analog audio signal; the second audio intensity is an audio intensity of the output analog audio signal.
In one possible implementation, the interactive smart tablet further includes an audio synthesis module 15:
the audio synthesis module 15 is configured to synthesize the analog audio signal with an analog audio signal corresponding to an audio/video file played in the interactive smart tablet;
the power amplifier module 12 is specifically configured to perform power amplification on the synthesized analog audio signal.
In one possible implementation, the interactive smart tablet further includes an audio mode switching module 16:
the audio mode switching module 16 is configured to determine a corresponding power amplification mode according to a required sound effect;
the power amplifier module 12 is specifically configured to perform power amplification on the analog audio signal according to the determined power amplification mode.
In a possible implementation manner, the bluetooth protocol processing module 11 is configured to obtain a digital audio signal corresponding to an audio collected by a microphone built in a bluetooth headset that is successfully paired, and includes:
and acquiring a digital audio signal corresponding to the audio collected by the built-in microphone of the successfully paired Bluetooth headset by adopting a master mode Bluetooth protocol.
An embodiment of the present invention provides a bluetooth headset, which may have a structure as shown in fig. 5, and includes a processing module 21 and a transmission module 22, where:
the processing module 21 is configured to acquire an analog audio signal through a built-in microphone, and convert the analog audio signal into a digital audio signal;
the transmission module 22 is configured to send the digital audio signal so that the successfully paired interactive smart tablet obtains the digital audio signal, converts the digital audio signal into an analog audio signal, performs power amplification on the analog audio signal, and outputs the analog audio signal obtained after the power amplification.
The functions of the functional units of the devices provided in the above embodiments of the present invention may be implemented by the steps of the corresponding methods, and therefore, detailed working processes and beneficial effects of the functional units in the devices provided in the embodiments of the present invention are not described herein again.
Further, the embodiment of the present invention further provides the following system.
The embodiment of the present invention provides a public address system, a schematic structural diagram of the system may be as shown in fig. 6, and the system may include a bluetooth headset 31 and an interactive smart tablet 32, where:
the bluetooth headset 31 is used for acquiring an analog audio signal through a built-in microphone, converting the analog audio signal into a digital audio signal and sending the digital audio signal;
the interactive smart tablet 32 is configured to obtain the digital audio signal, convert the digital audio signal into an analog audio signal, perform power amplification on the analog audio signal, and output the analog audio signal obtained after the power amplification.
In this embodiment, the interactive smart tablet 32 may include an open pluggable profile (OPS) module 3207, a Central Processing Unit (CPU) module 3208 and a display module 3209, in addition to the modules (the bluetooth protocol processing module 3201, the power amplifier module 3202 and the playing module 3203 (the playing module may be understood as a device for converting an analog audio signal into sound, for example, may be understood as a speaker), the smart audio distribution module 3204, the audio synthesis module 3205 and the audio mode switching module 3206) of the interactive smart tablet described in the above embodiments.
In one possible implementation, the CPU module 3208 in the interactive smart tablet may be android operating system based. The display module 3209 may include a display screen having a 4K resolution.
High-definition multimedia interface (HDMI) signals can be transmitted between the OPS module 3207 and the CPU module 3208, and the CPU module 3208 and the display module 3209 can be connected through a V-By-One interface.
It should be noted that, if the OPS module 3207 and the CPU module 3208 are included in the interactive smart tablet 32, the audio and video files played in the interactive smart tablet may be provided by the OPS module 3207 or may be provided by the CPU module 3208. The audio synthesizing module 3205 synthesizes an analog audio signal corresponding to the bluetooth headset with an analog audio signal corresponding to an audio/video file played in the interactive smart tablet, which may be understood as synthesizing the analog audio signal corresponding to the bluetooth headset with an analog audio signal provided by the OPS module 3207, or synthesizing the analog audio signal corresponding to the bluetooth headset with an analog audio signal provided by the CPU module 3208.
Of course, the audio/video file provided by the OPS module 3207 needs to receive the image and the audio therein through the CPU module 3208, and then the CPU module 3208 outputs the image to the display module 3209 for output, and outputs the audio to the power amplifier module 3202 and then the playback module outputs the audio.
In addition, it should be noted that, because the frequencies of the analog audio signal output by the bluetooth protocol processing module 3201 and the analog audio signal corresponding to the audio/video file played in the interactive smart tablet are different, the two paths of analog audio signals can be synthesized into one path of signal by the audio synthesizing module 3205, and the one path of signal is power-amplified by the power amplifier module 3202, and is played by the playing module 3203 after the power is amplified. Because the frequencies of the two analog audio signals are different, synchronous sound amplification of the two analog audio signals can be realized without mutual influence.
The two paths of analog audio signals are synthesized into one path of signal for power amplification, the power amplification of the two paths of analog audio signals can be realized by using one power amplification module, and the playing of the two paths of analog audio signals after power amplification can be realized by using one playing module.
Of course, in this embodiment, the two analog audio signals may not be synthesized, but each analog audio signal may be power-amplified separately.
If the two paths of analog audio signals are not synthesized, a power amplifier module is required to be arranged for power amplification aiming at the analog audio signals output by the bluetooth protocol processing module 3201, and a playing module is further arranged to realize playing of the analog audio signals after power amplification. Aiming at analog audio signals corresponding to audio and video files played in the interactive intelligent tablet, a power amplification module is also arranged for power amplification, and a playing module is further arranged for playing the analog audio signals after power amplification.
Therefore, the two paths of analog audio signals are combined into one path of signal by the audio combining module 3205, so that the number of power amplification modules and playing modules can be effectively saved, and the implementation complexity of the system is reduced.
In addition, if the intelligent audio distributing module 3204 is specifically configured to reduce the power corresponding to the second analog audio signal, which is split from the acquired analog audio signal and performs power amplification, when the second audio intensity is greater than the first audio intensity, until the second audio intensity is less than the first audio intensity, the interactive smart tablet may further include an intelligent voice recognition module 3210 and a volume sensor module 3211.
The volume sensor module 3211 is configured to determine a second audio intensity and notify the intelligent voice recognition module 3210;
the intelligent voice recognition module 3210 is configured to determine a first audio intensity, and notify the intelligent audio allocation module 3204 to perform power adjustment according to the determined first audio intensity and a size relationship between a second audio intensity reported by the volume sensor module 3211 until the second audio intensity is smaller than the first audio intensity.
In one possible implementation, the intelligent speech recognition module 3210 may be embedded in the CPU module 3208.
In a possible implementation manner, the intelligent voice recognition module 3210 may further perform voice recognition on the analog audio signal corresponding to the first audio intensity, so that the CPU module 3208 may perform a corresponding operation according to a voice recognition result. In addition, in this embodiment, the analog audio signals of the first audio intensity branched by the intelligent audio distribution module 3204 may be synchronized in a network manner, so as to implement remote video teaching.
In one possible implementation, the interactive smart tablet 32 may further include an audio processing module 3212. The audio processing module 3212 may be implemented based on Digital Signal Processing (DSP). And the audio processing module 3212 may be configured to perform sound quality anti-noise processing on the analog audio signal corresponding to the second audio intensity to optimize the sound amplification effect.
It should be noted that, when the power amplifier module 3202 performs audio amplification, the audio amplification may be performed according to the desired sound effect under the control of the audio mode switching module 3206.
Assuming that the required sound effects are 2.0 sound effects and 2.1 sound effects, the power amplifier module 3202 may be understood as including a 2.0 sound effect power amplifier sub-module and a 2.1 sound effect power amplifier sub-module. The CPU module 3208 may perform mode control on the audio mode switching module 3206 according to a required sound effect, and the power amplifier module 3202 may perform power amplification on an analog audio signal through the 2.0 sound effect power amplifier sub-module or the 2.1 sound effect power amplifier sub-module according to control of the audio mode switching module 3206 on an audio stream transmission path, and output the amplified analog audio signal through the play module 3203.
In the solution provided in this embodiment, the interactive smart tablet may also be replaced by other devices with a sound amplifying function, such as a personal computer, a television, and the like, which is not limited in this embodiment.
The following further explains the sound amplifying method provided by the present invention with reference to the system shown in fig. 6.
The embodiment of the present invention further provides a sound amplifying method, where the flow of the steps of the method may be as shown in fig. 7, and the method includes:
and step 301, the interactive intelligent tablet starts to operate.
Step 302, initializing the interactive intelligent tablet.
And step 303, the bluetooth protocol processing module in the interactive intelligent tablet searches for the bluetooth headset in a master mode and actively pairs with the bluetooth headset.
After the interactive smart tablet is successfully paired with the bluetooth headset, the interactive smart tablet establishes an audio streaming connection with the bluetooth headset and may continue to perform step 304. If the interactive smart tablet is not successfully paired with the Bluetooth headset, the Bluetooth headset may continue to be searched.
And step 304, the Bluetooth protocol processing module in the interactive intelligent tablet converts the received digital audio signals into analog audio signals, and the analog audio signals are divided into two paths of audio streams through the intelligent audio distribution module.
When a user speaks towards the Bluetooth headset, the Bluetooth headset can collect user audio and send the collected audio to the Bluetooth protocol processing module in the interactive intelligent tablet in the form of digital audio signals.
The Bluetooth protocol processing module in the interactive intelligent tablet converts the received digital audio signals into analog audio signals, and the analog audio signals are divided into two paths of audio streams through the intelligent audio distribution module.
One of the audio streams (marked as audio stream 3) is input into the intelligent voice recognition module, and the intelligent voice recognition module performs voice recognition. The voice recognition can be performed in a manner of matching with a pre-stored database language, if it is determined that the recognized voice corresponds to the pre-stored database language, an operation corresponding to the database language can be executed, and the process is ended, otherwise, no operation is executed, and the process is ended.
The other audio stream (marked as audio stream 4) can be subjected to sound quality anti-noise processing by the audio processing module, then input to the power amplification module for audio amplification, and then output by the playing module to complete local sound amplification and end the process.
It should be noted that, the audio stream obtained after the sound quality anti-noise processing is performed by the audio processing module may be synthesized with the audio stream (denoted as audio stream 1) provided by the OPS module (or the audio stream (denoted as audio stream 2) provided by the CPU module) by the audio synthesizing module, and the synthesized audio signals may be synchronously amplified by the power amplifier module, so that the interactive smart tablet may play the audio/video file and perform local audio amplification explanation while synchronously amplifying the audio/video file and the audio/video file without mutual influence.
When the audio stream provided by the OPS module (referred to as audio stream 1) is synthesized (or the audio stream provided by the CPU module (referred to as audio stream 2)), the audio stream provided by the OPS module or the audio stream provided by the CPU module can be selected by switching the audio streams and synthesized.
In the scheme provided by the embodiment of the invention, the universality and standard uniformity of the Bluetooth headset are considered, the interactive intelligent panel is used for realizing local sound amplification based on the Bluetooth headset, and the problems that the microphone of the existing sound amplification system is difficult to manage and the realization cost is high are solved. Meanwhile, the multiplexing of the sound amplifying function of the interactive intelligent panel is realized, and the problem that the current sound amplifying system is complex in configuration is also solved.
Based on the same inventive concept, embodiments of the present invention provide the following apparatus and medium.
The embodiment of the present invention provides a sound amplifying device, which may have a structure as shown in fig. 8, and includes a processor 41, a communication interface 42, a memory 43, and a communication bus 44, where the processor 41, the communication interface 42, and the memory 43 complete mutual communication through the communication bus 44;
the memory 43 is used for storing computer programs;
the processor 41 is configured to implement the steps of the above method embodiments of the present invention when executing the program stored in the memory.
Optionally, the processor 41 may specifically include a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), one or more Integrated circuits for controlling program execution, a hardware Circuit developed by using a Field Programmable Gate Array (FPGA), and a baseband processor.
Optionally, the processor 41 may include at least one processing core.
Alternatively, the Memory 43 may include a Read-Only Memory (ROM), a Random Access Memory (RAM), and a disk Memory. The memory 43 is used for storing data required by the at least one processor 41 during operation. The number of the memory 43 may be one or more.
An embodiment of the present invention further provides a non-volatile computer storage medium, where the computer storage medium stores an executable program, and when the executable program is executed by a processor, the method provided in the foregoing method embodiment of the present invention is implemented.
In particular implementations, computer storage media may include: various storage media capable of storing program codes, such as a Universal Serial Bus Flash Drive (USB), a mobile hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
In the embodiments of the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the described unit or division of units is only one division of logical functions, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical or other form.
The functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be an independent physical module.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, all or part of the technical solutions of the embodiments of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device, such as a personal computer, a server, or a network device, or a processor (processor) to execute all or part of the steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a Universal Serial Bus Flash Drive (usb Flash Drive), a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (11)
1. A method for amplifying sound, the method being applied to an interactive smart tablet, the method comprising:
acquiring a digital audio signal corresponding to audio collected by the Bluetooth headset successfully paired through the built-in microphone;
converting the digital audio signal to an analog audio signal;
and performing power amplification on the analog audio signal, and outputting the analog audio signal obtained after the power amplification.
2. The method of claim 1, wherein the method further comprises:
determining attenuation information of the output analog audio signal obtained after power amplification;
determining the power corresponding to the analog audio signal subjected to power amplification according to the attenuation information;
at this time, power-amplifying the analog audio signal includes:
and amplifying the power of the analog audio signal in the analog audio signal.
3. The method of claim 2, wherein determining attenuation information of the output analog audio signal obtained after power amplification, and determining the power corresponding to the power amplified analog audio signal according to the attenuation information comprises:
executing every set time length:
determining attenuation information of the output analog audio signal obtained after power amplification;
and determining the power corresponding to the analog audio signal subjected to power amplification according to the attenuation information.
4. The method of claim 2, wherein determining attenuation information of the output analog audio signal obtained after power amplification, and determining the power corresponding to the power amplified analog audio signal according to the attenuation information comprises:
when the second audio intensity is greater than the first audio intensity, reducing the power corresponding to a second analog audio signal which is separated from the acquired analog audio signal and is subjected to power amplification until the second audio intensity is less than the first audio intensity;
wherein the first audio intensity is the audio intensity of a first analog audio signal that is tapped from an acquired analog audio signal, and the sum of the power of the first analog audio signal and the power of the second analog audio signal is the power of the acquired analog audio signal; the second audio intensity is an audio intensity of the output analog audio signal.
5. The method of claim 1, wherein after converting the digital audio signal to an analog audio signal and before power amplifying the analog audio signal, the method further comprises:
synthesizing the analog audio signal with an analog audio signal corresponding to an audio and video file played in the interactive intelligent tablet;
power amplifying the analog audio signal, comprising:
and carrying out power amplification on the synthesized analog audio signal.
6. The method of claim 1, wherein power amplifying the analog audio signal comprises:
determining a corresponding power amplification mode according to the required sound effect;
and performing power amplification on the analog audio signal according to the determined power amplification mode.
7. The method of claim 1, wherein obtaining a digital audio signal corresponding to the audio collected by the paired successfully paired bluetooth headset through the built-in microphone comprises:
and acquiring a digital audio signal corresponding to the audio collected by the built-in microphone of the successfully paired Bluetooth headset by adopting a master mode Bluetooth protocol.
8. A public address system, characterized in that, the system includes pairing successful bluetooth headset and interactive intelligent tablet, wherein:
the Bluetooth headset is used for acquiring an analog audio signal through a built-in microphone, converting the analog audio signal into a digital audio signal and sending the digital audio signal;
the interactive intelligent tablet is used for acquiring the digital audio signal, converting the digital audio signal into an analog audio signal, performing power amplification on the analog audio signal, and outputting the analog audio signal obtained after the power amplification.
9. An interactive smart tablet, the interactive smart tablet comprising:
the Bluetooth protocol processing module is used for acquiring a digital audio signal corresponding to the audio collected by the Bluetooth headset successfully paired through the built-in microphone and converting the digital audio signal into an analog audio signal;
the power amplification module is used for carrying out power amplification on the analog audio signal;
and the playing module is used for outputting the analog audio signal obtained after the power amplification is carried out by the power amplification module.
10. A non-transitory computer storage medium storing an executable program for execution by a processor to perform the method of any one of claims 1 to 7.
11. A sound amplifying device, comprising a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus;
the memory is used for storing a computer program;
the processor, when executing the program stored in the memory, implementing the method steps of any of claims 1-7.
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