CN116232258A - Dual-power amplifier switching method and system - Google Patents
Dual-power amplifier switching method and system Download PDFInfo
- Publication number
- CN116232258A CN116232258A CN202310168618.8A CN202310168618A CN116232258A CN 116232258 A CN116232258 A CN 116232258A CN 202310168618 A CN202310168618 A CN 202310168618A CN 116232258 A CN116232258 A CN 116232258A
- Authority
- CN
- China
- Prior art keywords
- audio
- power amplifier
- input
- information
- broadcasting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000009977 dual effect Effects 0.000 claims description 37
- 230000015654 memory Effects 0.000 claims description 9
- 238000005070 sampling Methods 0.000 claims description 6
- 238000010801 machine learning Methods 0.000 claims description 4
- 239000000306 component Substances 0.000 description 8
- 238000013527 convolutional neural network Methods 0.000 description 8
- 238000012986 modification Methods 0.000 description 8
- 230000004048 modification Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 238000012545 processing Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000001755 vocal effect Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 239000010752 BS 2869 Class D Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000000873 masking effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000005236 sound signal Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 238000013528 artificial neural network Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000000306 recurrent effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 230000006403 short-term memory Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
- H03F3/217—Class D power amplifiers; Switching amplifiers
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/60—Information retrieval; Database structures therefor; File system structures therefor of audio data
- G06F16/65—Clustering; Classification
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/60—Information retrieval; Database structures therefor; File system structures therefor of audio data
- G06F16/68—Retrieval characterised by using metadata, e.g. metadata not derived from the content or metadata generated manually
- G06F16/683—Retrieval characterised by using metadata, e.g. metadata not derived from the content or metadata generated manually using metadata automatically derived from the content
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06N—COMPUTING ARRANGEMENTS BASED ON SPECIFIC COMPUTATIONAL MODELS
- G06N3/00—Computing arrangements based on biological models
- G06N3/02—Neural networks
- G06N3/08—Learning methods
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/03—Indexing scheme relating to amplifiers the amplifier being designed for audio applications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- Data Mining & Analysis (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Library & Information Science (AREA)
- Multimedia (AREA)
- Databases & Information Systems (AREA)
- Health & Medical Sciences (AREA)
- Evolutionary Computation (AREA)
- Life Sciences & Earth Sciences (AREA)
- Artificial Intelligence (AREA)
- Biomedical Technology (AREA)
- Biophysics (AREA)
- Computational Linguistics (AREA)
- Power Engineering (AREA)
- General Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Computing Systems (AREA)
- Mathematical Physics (AREA)
- Software Systems (AREA)
- Amplifiers (AREA)
Abstract
The embodiment of the specification provides a dual-power amplifier operation switching method and a system, wherein the method comprises the following steps: acquiring audio information of audio input by an input source; identifying characteristics of a target audience within the broadcast range of the loudspeaker; switching the type of the working power amplifier in the broadcasting system based on the audio information of the input audio and the characteristics of the target audience in the broadcasting range, comprising: when the characteristics of a target audience in the broadcasting range meet a first preset condition and the type of the input audio meets a second preset condition, the broadcasting system switches the working power amplifier to a first type of power amplifier; and when the characteristics of the target audience in the broadcasting range meet a third preset condition and the type of the input audio meet a fourth preset condition, the broadcasting system switches the working power amplifier to the second type power amplifier.
Description
Technical Field
The present disclosure relates to the field of audio technologies, and in particular, to a method and system for switching between dual power amplifiers.
Background
The power amplifier is called a power amplifier or an amplifier for short, and generally refers to a most basic device in a sound system, commonly called a loudspeaker, and the power amplifier can be used for amplifying weak electric signals emitted from a signal source or a sound console in a professional sound system to drive a loudspeaker, namely a loudspeaker to emit sound. Power amplifier may also refer to other devices that perform power amplification.
The power amplifier can amplify weaker signals input by the sound source equipment and then generate enough current to push the loudspeaker to replay sound. Different power amplifiers are also different in internal signal processing, line design and production process due to consideration of power, impedance, distortion, dynamics and different use ranges and control and regulation functions. According to the principle of amplifying analog signals, the power amplifier can be divided into A class, B class, AB class and D class.
Two or more output tubes in the output stage of the class a power amplifier are always in a conductive state, and remain conductive current regardless of whether signals are input or not, and make the two currents equal to the peak value of alternating current. The working mode of the A-type power amplifier has optimal linearity, and each output tube amplifies the signal full wave and has no crossover distortion. The greatest disadvantage of class a power amplifiers is their low efficiency, since full current still flows when no signal is present, and the electrical energy is converted to high heat. As the signal level increases, some power may enter the load, but much is still converted to heat. The class A power amplifier has the advantages of ideal selection of replayed music, smooth tone quality, mellow and warm tone color and transparent high-pitch.
The working principle of the class B power amplifier is completely different from that of a pure class A power amplifier. When in an operational state, the positive and negative channels of the transistor are normally in an off state unless a signal is input. When the positive phase signal passes, only the positive phase channel works, while the negative phase channel is closed, and the two channels can not work at the same time. So there is no power loss at all in the portion where there is no signal. Crossover distortion is often generated when the positive and negative channels are open and closed, especially at low levels. In a strict sense, the class B power amplifier does not belong to a high-fidelity power amplifier. The class B power amplifier has about 75 percent of efficiency, lower heat generation amount than the class A power amplifier, and smaller heat radiator is generally used.
The class AB power amplifier is compatible with the advantages of class A and class B power amplifiers, balances the performance of the class A and class B power amplifiers, and is a mainstream power amplifier product at present. Class AB power amplifiers usually have two bias voltages, and a small amount of current can pass through an output tube when no signal exists; and when the signal is smaller, the class A power amplifier working mode is used to acquire the optimal linearity. When the signal reaches a certain level, the signal is automatically switched to a class B power amplifier working mode, and better efficiency is obtained. The class AB power amplifier has the advantages of obtaining good tone quality fidelity, improving efficiency and reducing heat. There is a disadvantage in that crossover distortion occurs.
The class D power amplifier is a digital power amplifier. The class D power amplifier directly connects a load with a power supply, and the output tube of the current flowing point has no voltage, so that no power is consumed. When the output pipe is closed, the whole power supply voltage is generated on the transistor. And no current is needed, power is not consumed, and the working efficiency of the class D power amplifier is theoretically 100%. The class D power amplifier has the advantages that the efficiency is highest, the power supply can be reduced, almost no heat is generated, the heat generated by a large radiator is not needed, so that the class D amplifier does not need a large radiator, the size and weight of the power amplifier are obviously reduced, and the relative cost is lower. However, the D-type power amplifier is complex in operation, the added circuit is inevitably free from deviation, the distortion is serious, the EMI index is poor, and the radiation is relatively high.
In an audio system, a power amplifier is used as a core component to influence whether the whole audio system can work normally. Generally, in an audio playing system with high availability, two power amplifiers are often required to be prepared to prevent one of the power amplifiers from malfunctioning, so that the whole audio system cannot work. The two power amplifiers are typically an AB-type power amplifier and a D-type power amplifier. However, in general, the class-D power amplifier is used as a backup of the class-AB power amplifier in the audio playing system, and the audio playing system is switched to the class-D power amplifier when the class-AB power amplifier fails. Therefore, under the normal condition, the efficiency of the playing system is lower, the energy consumption is high, the working time of the AB class power amplifier with higher cost is longer, and the AB class power amplifier is more prone to faults.
Therefore, it is of great importance to those skilled in the art to research a dual-power amplifier switching method and system capable of switching the working power amplifier according to the playing scene and the audience characteristics.
Disclosure of Invention
One or more embodiments of the present disclosure provide a dual power amplifier operation switching method, which is characterized in that the method includes: acquiring information of audio input by an input source; identifying characteristics of a target audience within the broadcast range of the loudspeaker; switching the type of the working power amplifier in the broadcasting system based on the audio information of the input audio and the characteristics of the target audience in the broadcasting range, comprising: when the characteristics of a target audience in the broadcasting range meet a first preset condition and the type of the input audio meets a second preset condition, the broadcasting system switches the working power amplifier to a first type of power amplifier; and when the characteristics of the target audience in the broadcasting range meet a third preset condition and the type of the input audio meet a fourth preset condition, the broadcasting system switches the working power amplifier to the second type power amplifier.
One or more embodiments of the present specification provide a dual power amplifier operation switching system, which includes: the audio information acquisition module is used for acquiring information of audio input by the input source; the broadcasting range audience information acquisition module is used for identifying the characteristics of a target audience in the broadcasting range of the loudspeaker; and the dual-power amplifier operation switching module is used for switching the type of the operation power amplifier in the broadcasting system based on the audio information of the input audio and the characteristics of the target audience in the broadcasting range.
One or more embodiments of the present specification provide a dual power amplifier operation switching device including at least one processor and at least one memory; the at least one memory is configured to store computer instructions; the at least one processor is configured to execute at least some of the computer instructions to implement the method of dual amplifier operation switching of any of the above embodiments.
One or more embodiments of the present disclosure provide a computer-readable storage medium storing computer instructions that, when read by a computer, perform a method of dual amplifier operation switching as in any of the above embodiments.
Drawings
The present specification will be further elucidated by way of example embodiments, which will be described in detail by means of the accompanying drawings. The embodiments are not limiting, in which like numerals represent like structures, wherein:
fig. 1 is a schematic diagram of an application scenario of a dual-power amplifier operation switching system according to some embodiments of the present disclosure;
FIG. 2 is an exemplary block diagram of a dual amplifier operation switching system according to some embodiments of the present disclosure;
fig. 3 is an exemplary flow chart of a method of dual power amplifier operation switching shown in accordance with some embodiments of the present description;
fig. 4 is a schematic diagram of an audio content determination model according to some embodiments of the present description.
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present specification, the drawings that are required to be used in the description of the embodiments will be briefly described below. It is apparent that the drawings in the following description are only some examples or embodiments of the present specification, and it is possible for those of ordinary skill in the art to apply the present specification to other similar situations according to the drawings without inventive effort. Unless otherwise apparent from the context of the language or otherwise specified, like reference numerals in the figures refer to like structures or operations.
It will be appreciated that "system," "apparatus," "unit" and/or "module" as used herein is one method for distinguishing between different components, elements, parts, portions or assemblies at different levels. However, if other words can achieve the same purpose, the words can be replaced by other expressions.
As used in this specification and the claims, the terms "a," "an," "the," and/or "the" are not specific to a singular, but may include a plurality, unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that the steps and elements are explicitly identified, and they do not constitute an exclusive list, as other steps or elements may be included in a method or apparatus.
A flowchart is used in this specification to describe the operations performed by the system according to embodiments of the present specification. It should be appreciated that the preceding or following operations are not necessarily performed in order precisely. Rather, the steps may be processed in reverse order or simultaneously. Also, other operations may be added to or removed from these processes.
Fig. 1 is a schematic diagram of an application scenario of a dual-power amplifier operation switching system according to some embodiments of the present disclosure. As shown in fig. 1, an application scenario 100 of the dual amplifier operation switching system includes a dual amplifier operation switching system 110, a network 120, a storage device 130, a processor 140, and a terminal device 150. The dual-power amplifier operation switching system 110 comprises a play scene recognition device, an AB class power amplifier and a D class power amplifier.
The dual power amplifier operation switching system 110 may be used to switch the operation power amplifier to an AB class power amplifier or a D class power amplifier based on different play scenarios. For example, the dual amplifier operation switching system 110 may be used to determine a switched operation power amplifier based on audio playback environment information. For example, the working power amplifier may be switched based on the audio content being played.
The network 120 may connect components of the system and/or connect the system with external resource components. Network 120 enables communication between components and other parts of the system to facilitate the exchange of data and/or information. For example, the processor 140 may obtain audio playback environment related data from the storage device 130 via the network 120. For another example, the processor 140 may determine whether to switch the operational power amplifier from the system 110 via the network 120. For another example, the terminal device 150 may send an instruction to switch the operational power amplifier to the dual-power amplifier operation switching system 110 through the network 120. For another example, the terminal device 150 may obtain the operation state of the dual amplifier operation switching system 110 through the network 120.
In some embodiments, network 120 may be any one or more of a wired network or a wireless network. For example, the network 120 may include a cable network, a fiber optic network, a telecommunications network, the internet, a Local Area Network (LAN), a Wide Area Network (WAN), a Wireless Local Area Network (WLAN), a Metropolitan Area Network (MAN), a Public Switched Telephone Network (PSTN), a bluetooth network, a ZigBee network, a Near Field Communication (NFC), an intra-device bus, an intra-device line, a cable connection, and the like, or any combination thereof. The network connection between the parts can be in one of the above-mentioned ways or in a plurality of ways. In some embodiments, the network may be a point-to-point, shared, centralized, etc. variety of topologies or a combination of topologies.
The storage device 130 may be used to store data and/or instructions related to the application scenario 100 of the dual amplifier operation switching system. In some embodiments, the storage device 130 may store data and/or information obtained from the dual amplifier operation switching system 110, the processor 140, the terminal device 150, etc. For example, the storage device 130 may store audio playback scene information, a preset power amplifier operation mode, and the like.
In some embodiments, processor 140 may include one or more processing engines (e.g., a single chip processing engine or a multi-chip processing engine). By way of example only, the processor 140 may include a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), an Application Specific Instruction Processor (ASIP), a Graphics Processor (GPU), a Physical Processor (PPU), a Digital Signal Processor (DSP), a Field Programmable Gate Array (FPGA), an editable logic circuit (PLD), a controller, a microcontroller unit, a Reduced Instruction Set Computer (RISC), a microprocessor, or the like, or any combination thereof.
In some embodiments, terminal device 150 may be stationary and/or mobile. For example, the terminal device 150 may be integrated directly on the dual amplifier operation switching system 110 as part of the processor 110 and/or the dual amplifier operation switching system 110. For another example, the terminal device 150 may be a mobile device, and the user may carry the terminal device 150 at a remote location with respect to the processor 140, the dual amplifier operation switching system 110, and the terminal device 150 may be connected to and/or communicate with the processor 140 and/or the dual amplifier operation switching system 110 through the network 120. In some embodiments, the processor 140 may be included in the terminal device 150.
In some embodiments, terminal device 150 may receive the user request and send information related to the request to processor 140 via network 120. For example, terminal device 150 may receive a request from a user to send relevant information and send information related to the request to processor 140 via, for example, network 120. Terminal device 150 may also receive information from processor 140 via network 120. For example, the terminal device 150 may receive the related information of the dual amplifier operation switching system 110 from the processor 140, and the determined one or more related information may be displayed on the terminal device 150. For another example, the processor 140 may send the result of the determination of the related information of the dual power amplifier operation switching system 110 (e.g., the operation state of the operation power amplifier, etc.) or the related data of the operation power amplifier to the terminal device 150.
It should be noted that the application scenario 100 based on the dual amplifier operation switching system is provided for illustrative purposes only and is not intended to limit the scope of the present description. Many modifications and variations will be apparent to those of ordinary skill in the art in light of the present description. For example, the application scenario may also include a database. As another example, the application scenario 100 may be implemented on other devices to implement similar or different functionality. However, variations and modifications do not depart from the scope of the present description.
Fig. 2 is an exemplary block diagram of a dual amplifier operation switching system according to some embodiments of the present description. In some embodiments, the dual amplifier operation switching system 110 may include an audio information acquisition module 210, a broadcast range listener information acquisition module 220, and a dual amplifier operation switching module 230.
In some embodiments, the audio information acquisition module 210 is configured to acquire audio information of input audio of an input source. In some embodiments, the audio information acquisition module 210 may include an audio file information acquisition unit 211 and an audio content information determination unit 212. The relevant description for the audio information may refer to the description of the part of fig. 3;
in some embodiments, the broadcast range audience information acquisition module 220 may be used to identify characteristics of a target audience within the speaker broadcast range.
In some embodiments, the dual amplifier operation switching module 230 may be configured to switch the type of operation amplifier in the playback system based on the audio information of the input audio and the characteristics of the target audience within the playback range. For a relevant description of the switching of the operational power amplifier, reference may be made to the description of the part of fig. 3;
it should be noted that the above description of the dual-power amplifier operation switching system and the modules thereof is for convenience only and is not intended to limit the present disclosure to the scope of the illustrated embodiments. It will be appreciated by those skilled in the art that, given the principles of the system, various modules may be combined arbitrarily or a subsystem may be constructed in connection with other modules without departing from such principles. In some embodiments, the audio information acquisition module 210, the broadcast range audience information acquisition module 220, and the dual amplifier operation switching module 230 disclosed in fig. 2 may be different modules in one system, or may be one module to implement the functions of two or more modules. For example, each module may share one memory module, or each module may have a respective memory module. Such variations are within the scope of the present description.
Fig. 3 is an exemplary flow chart of a dual power amplifier operation power amplifier switching method according to some embodiments of the present description. In some embodiments, the process 300 may be performed by a processor. As shown in fig. 3, the process 300 includes the steps of:
in step 310, audio information of input audio of an input source is acquired. Step 310 may be performed by the audio information acquisition module 210.
Input source input audio refers to an audio signal that the playback system needs to amplify through a power amplifier and play through a speaker. In some embodiments, the input source input audio includes digital signals and analog signals. The audio information refers to information related to input audio. In some embodiments, the audio information includes audio file information. In some embodiments, the audio information further comprises audio content information.
In some embodiments, the audio file information may be obtained by a decoder of the playback system. In some embodiments, the audio file information includes audio format information and audio file meta information of the audio file. In some embodiments, the audio file formats include Lossless compression formats (e.g., FLAC format, APE format, apple Lossless format, etc.) and lossy compression formats (e.g., MP3 format, AAC format, opus format, etc.). In some embodiments, the audio file meta information includes the sample rate, bit rate, audio bandwidth, audio file name, etc. of the audio file. In some embodiments, the audio file meta information may also include ancillary information of the audio file, such as information of audio file drawings and audio file text.
The audio content information refers to information related to the content and type of the input audio of the input source, such as a vocal song, pure music, a vocal sound, an environmental sound, and the like. In some embodiments, the audio content information may be determined using a machine learning method.
In some embodiments, the audio content information may be determined by an audio content determination model. In some embodiments, the audio content determination model may be a traditional algorithm model (e.g., hidden Markov Model (HMM) and Dynamic Time Warping (DTW) model) or a machine learning model (e.g., recurrent Neural Network (RNN), long short-term memory module (LSTM), convolutional Neural Network (CNN), etc.). In some embodiments, the audio content determination model is a CNN model. In some embodiments, the audio content determination model may convert the audio file into a spectrogram and input the spectrogram into a CNN plus linear classifier, producing predictions about the sound content categories.
Fig. 4 is a schematic diagram of an audio content determination model according to some embodiments of the present description.
In some embodiments, the audio content determination model may determine a classification of the audio content.
In some embodiments, the audio content determination model may convert audio data in the audio file into a Spectrogram, e.g., mel-Spectrogram (Mel-Spectrogram) and/or Mel-cepstra (MFCCs). In some embodiments, converting the audio file to a spectrogram conversion includes channel conversion of the audio, e.g., converting mono of the audio to binaural stereo. In some embodiments, converting the audio file to a spectrogram conversion includes normalizing the sampling rate for the sound file, i.e., normalizing and converting all audio to the same sampling rate (e.g., 48 kHz), so that all arrays have the same size. In some embodiments, converting the audio file to a spectrogram includes resizing all audio samples to have the same length. In some embodiments, the audio duration may be adjusted by filling or truncating its length with silence. In some embodiments, converting the audio file to a spectrogram transform includes applying a time offset to shift the audio left or right by a random amount to data augment the original audio signal. In some embodiments, the spectrogram may also be frequency masked, for example, by adding a horizontal bar over the spectrogram to randomly mask a series of consecutive frequencies. In some embodiments, the spectrogram may also be time-masked, for example, using vertical lines to randomly block the time range from the spectrogram. In some embodiments, the mask portion may be replaced with an average value. Frequency masking and time masking of the spectrograms can prevent overfitting and help better generalize the audio content information model.
In some embodiments, the audio content determination model may be trained based on sample audio data. In some embodiments, the sample audio data includes sample audio and corresponding audio content tags (e.g., vocal songs, pure music, vocal, ambient sounds, etc.).
In some embodiments, the audio content determination model includes a plurality of CNN layers and a linear layer, the input of the CNN layers in the audio content determination model includes a processed spectral image, and the output of the CNN layers is a feature map. In some embodiments, the output of the CNN may be the input to the linear layer. In some embodiments, the output of the linear layer may be the classification of the audio correspondence and its probability. In some embodiments, the audio content determination model may determine the class with the highest probability value as the audio class.
The speaker broadcasting range refers to an area range that needs to be covered by the audio content. In some embodiments, the speaker broadcast range includes a space of a particular venue, such as a particular room or open-air space. The characteristics of the target audience refer to the relevant characteristics of the range of areas that the audio content needs to cover. In some embodiments, the characteristics of the target audience may include the number of listeners, the density of listeners, or the like. In some embodiments, the characteristics of the target audience may also include identity information of the target audience.
In some embodiments, the characteristics of the target audience may be obtained through a machine learning model. In some embodiments, the number of listeners and the density of listeners may be determined by a high-precision head-shoulder detection algorithm. In some embodiments, the face information of the listener may also be determined by a face recognition algorithm, thereby determining the identity information of the listener.
In some embodiments, the playback system switches the operational power amplifier to the first type of power amplifier when the characteristics of the target audience within the playback range meet a first preset condition and when the audio characteristics of the input audio meet a second preset condition. In some embodiments, the first class of power amplifiers is class AB power amplifiers. In some embodiments, the feature of the target audience within the public address range satisfying the first preset condition includes the number or density of target listeners within the public address range exceeding a preset threshold (e.g., the number of people is greater than 20 or the density of people is greater than 1 person per square meter). In some embodiments, the type of input audio satisfies the second preset condition that the type of audio input is music and the sampling rate and bit rate of the audio exceeds a preset threshold (e.g., the audio sampling rate exceeds 44.1kHz and the bit rate exceeds 192 kbps).
In some embodiments, the playback system switches the operational power amplifier to the second type of power amplifier when the characteristics of the target audience within the playback range meet a third preset condition or the type of input audio meets a fourth preset condition. In some embodiments, the second class of power amplifiers is class D power amplifiers. In some embodiments, the third preset condition includes the number or density of target listeners within the public address range exceeding a preset threshold (e.g., the number of people is less than 5 or the density of people is less than 0.1 people per square meter). In some embodiments, the type of input audio satisfies the fourth preset condition that the type of audio input is a human voice or an ambient sound.
In some embodiments, the default operational amplifier in the playback system is a class AB operational amplifier. In some embodiments, the type of working power amplifier in the broadcast system may be switched based on preset conditions.
In some embodiments, if the identity information of the listeners in the broadcast range does not match the stored listener list, representing that there is no listener with a special listening requirement in the broadcast range, the working power amplifier may be switched to a class D power amplifier. In some embodiments, the operational power amplifier may be switched when the input audio information satisfies a preset condition. For example, when the played audio content is pure voice, the working power amplifier may be switched to a class D power amplifier. For another example, when the sampling rate and the bit rate of the played audio content are both lower than the preset threshold, the working power amplifier may be switched to the class D power amplifier.
In some embodiments of the present disclosure, by combining audio content information and audience information of a broadcasting environment, under the condition that a preset condition is satisfied, a working power amplifier in a dual-power-amplifier broadcasting system is switched to a class D power amplifier, so that a working load of a class AB power amplifier in the broadcasting system can be reduced, energy consumption of the broadcasting system is saved, and maintenance and overhaul costs of power amplifier faults in the broadcasting system are reduced.
While the basic concepts have been described above, it will be apparent to those skilled in the art that the foregoing detailed disclosure is by way of example only and is not intended to be limiting. Although not explicitly described herein, various modifications, improvements, and adaptations to the present disclosure may occur to one skilled in the art. Such modifications, improvements, and modifications are intended to be suggested within this specification, and therefore, such modifications, improvements, and modifications are intended to be included within the spirit and scope of the exemplary embodiments of the present invention.
Meanwhile, the specification uses specific words to describe the embodiments of the specification. Reference to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic is associated with at least one embodiment of the present description. Thus, it should be emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various positions in this specification are not necessarily referring to the same embodiment. Furthermore, certain features, structures, or characteristics of one or more embodiments of the present description may be combined as suitable.
Furthermore, the order in which the elements and sequences are processed, the use of numerical letters, or other designations in the description are not intended to limit the order in which the processes and methods of the description are performed unless explicitly recited in the claims. While certain presently useful inventive embodiments have been discussed in the foregoing disclosure, by way of various examples, it is to be understood that such details are merely illustrative and that the appended claims are not limited to the disclosed embodiments, but, on the contrary, are intended to cover all modifications and equivalent arrangements included within the spirit and scope of the embodiments of the present disclosure. For example, while the system components described above may be implemented by hardware devices, they may also be implemented solely by software solutions, such as installing the described system on an existing server or mobile device.
Likewise, it should be noted that in order to simplify the presentation disclosed in this specification and thereby aid in understanding one or more inventive embodiments, various features are sometimes grouped together in a single embodiment, figure, or description thereof. This method of disclosure, however, is not intended to imply that more features than are presented in the claims are required for the present description. Indeed, less than all of the features of a single embodiment disclosed above.
In some embodiments, numbers describing the components, number of attributes are used, it being understood that such numbers being used in the description of embodiments are modified in some examples by the modifier "about," approximately, "or" substantially. Unless otherwise indicated, "about," "approximately," or "substantially" indicate that the number allows for a 20% variation. Accordingly, in some embodiments, numerical parameters set forth in the specification and claims are approximations that may vary depending upon the desired properties sought to be obtained by the individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and employ a method for preserving the general number of digits. Although the numerical ranges and parameters set forth herein are approximations that may be employed in some embodiments to confirm the breadth of the range, in particular embodiments, the setting of such numerical values is as precise as possible.
Each patent, patent application publication, and other material, such as articles, books, specifications, publications, documents, etc., referred to in this specification is incorporated herein by reference in its entirety. Except for application history documents that are inconsistent or conflicting with the content of this specification, documents that are currently or later attached to this specification in which the broadest scope of the claims to this specification is limited are also. It is noted that, if the description, definition, and/or use of a term in an attached material in this specification does not conform to or conflict with what is described in this specification, the description, definition, and/or use of the term in this specification controls.
Finally, it should be understood that the embodiments described in this specification are merely illustrative of the principles of the embodiments of this specification. Other variations are possible within the scope of this description. Thus, by way of example, and not limitation, alternative configurations of embodiments of the present specification may be considered as consistent with the teachings of the present specification. Accordingly, the embodiments of the present specification are not limited to only the embodiments explicitly described and depicted in the present specification.
Claims (10)
1. The double-power amplifier operation switching method is characterized by comprising the following steps of:
acquiring audio information of audio input by an input source;
identifying characteristics of a target audience within the broadcast range of the loudspeaker;
switching the type of the working power amplifier in the broadcasting system based on the audio information of the input audio and the characteristics of the target audience in the broadcasting range, comprising:
when the characteristics of a target audience in the broadcasting range meet a first preset condition and the audio characteristics of the input audio meet a second preset condition, the broadcasting system switches the working power amplifier into a first type power amplifier;
when the characteristics of a target audience in the broadcasting range meet a third preset condition or the audio characteristics of the input audio meet a fourth preset condition, the broadcasting system switches the working power amplifier to the second type power amplifier.
2. The method of claim 1, wherein the obtaining audio information of the input source input audio comprises:
acquiring meta information of the input audio, wherein the meta information at least comprises a sampling rate and a bit rate of the input audio;
an audio classification and probability of the input audio is determined based on a machine learning model.
3. The method of claim 1, wherein identifying characteristics of a target audience within a range of speaker announcements comprises:
determining the number of listeners in the broadcasting range;
it is determined whether a specific listening demand listener is present within the public address range.
4. The method of claim 1, wherein the first class of power amplifiers is class AB power amplifiers and the second class of power amplifiers is class D power amplifiers.
5. A dual amplifier operation switching system, the system comprising:
the audio information acquisition module is used for acquiring information of audio input by the input source;
the broadcasting range audience information acquisition module is used for identifying the characteristics of a target audience in the broadcasting range of the loudspeaker; and
and the dual-power amplifier operation switching module is used for switching the type of the operation power amplifier in the broadcasting system based on the audio information of the input audio and the characteristics of the target audience in the broadcasting range.
6. The system of claim 5, wherein the audio information acquisition module comprises an audio file information acquisition unit and an audio content information determination unit.
7. The system of claim 5, wherein the audio content information determination unit comprises an audio content determination model.
8. The system of claim 5, wherein the audio content determination comprises a plurality of CNN layers and a linear layer. Wherein the output of the CNN layer may be the input of the linear layer.
9. A dual amplifier operation switching device, the device comprising at least one processor and at least one memory;
the at least one memory is configured to store computer instructions;
the at least one processor is configured to execute at least some of the computer instructions to implement the method of dual amplifier operation switching as claimed in any one of claims 1-4.
10. A computer readable storage medium storing computer instructions which, when read by a computer in the storage medium, perform the method of dual amplifier operation switching of any one of claims 1-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310168618.8A CN116232258A (en) | 2023-02-27 | 2023-02-27 | Dual-power amplifier switching method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310168618.8A CN116232258A (en) | 2023-02-27 | 2023-02-27 | Dual-power amplifier switching method and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116232258A true CN116232258A (en) | 2023-06-06 |
Family
ID=86580186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310168618.8A Pending CN116232258A (en) | 2023-02-27 | 2023-02-27 | Dual-power amplifier switching method and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116232258A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080253584A1 (en) * | 2007-04-12 | 2008-10-16 | Princeton Technology Corporation | Audio playing systems |
| CN202135293U (en) * | 2011-07-15 | 2012-02-01 | 深圳市奥尼电子工业有限公司 | Frequency conversion sound box |
| CN102355204A (en) * | 2011-05-20 | 2012-02-15 | 深圳市纳芯威科技有限公司 | Automatic audio power amplifier switching circuit and power amplifier chip |
| CN203675057U (en) * | 2013-09-02 | 2014-06-25 | 上海智浦欣微电子有限公司 | Audio power amplifier of integrated boosted circuit |
| US20220231650A1 (en) * | 2021-01-21 | 2022-07-21 | Biamp Systems, LLC | Audio equalization of audio environment |
| CN115658002A (en) * | 2022-12-26 | 2023-01-31 | 南京芯驰半导体科技有限公司 | Audio playing method and device of vehicle system, electronic equipment and storage medium |
-
2023
- 2023-02-27 CN CN202310168618.8A patent/CN116232258A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080253584A1 (en) * | 2007-04-12 | 2008-10-16 | Princeton Technology Corporation | Audio playing systems |
| CN102355204A (en) * | 2011-05-20 | 2012-02-15 | 深圳市纳芯威科技有限公司 | Automatic audio power amplifier switching circuit and power amplifier chip |
| CN202135293U (en) * | 2011-07-15 | 2012-02-01 | 深圳市奥尼电子工业有限公司 | Frequency conversion sound box |
| CN203675057U (en) * | 2013-09-02 | 2014-06-25 | 上海智浦欣微电子有限公司 | Audio power amplifier of integrated boosted circuit |
| US20220231650A1 (en) * | 2021-01-21 | 2022-07-21 | Biamp Systems, LLC | Audio equalization of audio environment |
| CN115658002A (en) * | 2022-12-26 | 2023-01-31 | 南京芯驰半导体科技有限公司 | Audio playing method and device of vehicle system, electronic equipment and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105531759B (en) | Loudness for lower mixed audio content adjusts | |
| US9984703B2 (en) | Sound verification | |
| CN105556837B (en) | Dynamic range control for various playback environments | |
| CN110970014B (en) | Voice conversion, file generation, broadcasting and voice processing method, equipment and medium | |
| US20100324894A1 (en) | Voice to Text to Voice Processing | |
| CN107851440A (en) | The dynamic range control based on metadata of coded audio extension | |
| CN202189551U (en) | Speech rapid translation equipment | |
| JP2020003774A (en) | Method and apparatus for processing speech | |
| CN102547523A (en) | Volume adjusting method and device | |
| JP2017163555A (en) | Channel number converting device | |
| CN112702023B (en) | Power supply device and method of audio power amplifier circuit, related circuit and electronic equipment | |
| CN116232258A (en) | Dual-power amplifier switching method and system | |
| JP2017511905A (en) | Signal classification method and apparatus, and audio encoding method and apparatus using the same | |
| CN102571011A (en) | Method and device for adjusting sound volume | |
| Mores | Music studio technology | |
| CN212909995U (en) | Audio gain adjusting device of sound card | |
| CN110580906B (en) | Far-field audio amplification method and system based on cloud data | |
| CN108235185A (en) | Source of sound input client device, remote controler and the system for playing music | |
| Leembruggen | Equalizing the Effects of Perforated Cinema Screens | |
| JP2021524938A (en) | Calculation method and equipment for downmixed signals | |
| US12010495B2 (en) | Techniques for audio track analysis to support audio personalization | |
| US10348880B2 (en) | System and method for generating audio data | |
| CN106375053A (en) | Intelligent public broadcasting system | |
| EP3920049A1 (en) | Techniques for audio track analysis to support audio personalization | |
| JP4297433B2 (en) | Speech synthesis method and apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |