CN117395568B - Noise reduction method, device, equipment and storage medium for audio playback device - Google Patents

Abstract

The present invention relates to the field of audio processing technology, and provides a noise reduction method, device, equipment and storage medium for an audio playback device, including: in the debugging stage of the audio playback device, collecting preset audio information played by each playback source; wherein each playback source is different, and the audio information played by each playback source is the same; generating a corresponding reverse noise reduction signal for the preset audio information collected from each playback source; synthesizing each reverse noise reduction signal to obtain a synthesized reverse noise reduction signal; analyzing the synthesized reverse noise reduction signal to obtain a signal generation method corresponding to the synthesized reverse noise reduction signal; based on the signal generation method, generating a corresponding noise reduction method as the noise reduction method of the audio playback device. In the present invention, by adopting a unified noise reduction method for each different playback source, it is avoided to adjust the noise reduction algorithm according to different playback sources.

Description

Noise reduction method, device, equipment and storage medium for audio playback equipment

Technical Field

The present invention relates to the technical field of audio processing, and in particular to a noise reduction method, device, equipment and storage medium for an audio playback device.

Background technique

In audio playback equipment, due to various reasons (such as interference during the transmission process, noise from the equipment itself, etc.), there will be noise interference in the audio signal, thus affecting the audio playback quality. In order to provide a better audio experience, noise reduction technology is often used in the existing technology to reduce noise interference.

Currently common noise reduction technologies include active noise reduction and passive noise reduction. Active noise reduction technology uses noise reduction devices or algorithms to actively send out signals that are opposite to the noise to offset the noise. Passive noise reduction technology adds a noise reduction module to the audio playback device to suppress noise based on the preset noise reduction signal.

However, existing noise reduction technologies have the following problems in practical applications:

In order to meet the requirements of different playback sources and audio information, the noise reduction effect needs to be accurately processed for specific noises. The design and optimization of noise reduction algorithms or modules need to be adjusted according to different playback sources, resulting in the need to use different noise reduction methods when receiving audio from different playback sources, large data processing volume, algorithm redundancy, and increased costs.

Contents of the invention

The main purpose of the present invention is to provide a noise reduction method, device, equipment and storage medium for audio playback equipment, aiming to avoid separately adjusting the noise reduction algorithm according to different playback sources.

In order to achieve the above object, the present invention provides a noise reduction method for audio playback equipment, which is applied to the audio playback equipment. The method includes the following steps:

During the debugging phase of the audio playback device, the preset audio information played by each playback source is collected; each playback source is different, and the audio information played by each playback source is the same;

Generate corresponding reverse noise reduction signals for the collected preset audio information of each playback source;

Synthesize each reverse noise reduction signal to obtain a synthetic reverse noise reduction signal;

The synthetic reverse noise reduction signal is analyzed to obtain the signal generation method corresponding to the synthetic reverse noise reduction signal; based on the signal generation method, the corresponding noise reduction method is generated as the noise reduction method of the audio playback device.

Further, the step of collecting preset audio information played by each play source includes:

Control the rotating device to drive the audio playback equipment to rotate and move toward each playback source in turn; wherein, each playback source forms a circle, and the rotation device and the audio playback equipment are in the center;

When it is detected that the audio playback device is facing one of the playback sources, control the corresponding playback source to play the preset audio information;

After the corresponding play source completes playing the preset audio information, the rotating device is controlled to drive the audio playback device to rotate and move toward the next play source.

Further, the step of generating corresponding reverse noise reduction signals for the collected preset audio information of each playback source includes:

Extract the noise signal carried in the collected preset audio information of each playback source;

A signal completely opposite to the waveform of the noise signal is generated as the corresponding inverse noise reduction signal.

Further, the synthetic reverse noise reduction signal is analyzed to obtain a signal generation method corresponding to the synthetic reverse noise reduction signal; based on the signal generation method, a corresponding noise reduction method is generated as the audio playback device The steps for noise reduction include:

Extracting the frequency spectrum characteristics of the synthesized inverse noise reduction signal, and analyzing the changing trend of the frequency spectrum characteristics;

Based on the changing trend of the spectrum characteristics, detect the type of noise and the position of the noise frequency band existing in the synthetic inverse noise reduction signal;

According to the noise type and the position of the noise frequency band, the basic principle and algorithm of noise reduction signal generation are determined; wherein the algorithm includes frequency control and phase control;

Based on the basic principle and algorithm of generating the noise reduction signal, a corresponding noise reduction method is matched in a database and used as the noise reduction method of the audio playback device.

Further, after the step of generating a corresponding noise reduction method based on the signal generation method as the noise reduction method of the audio playback device, the method further comprises:

During the use phase, each of the playback sources is controlled to play audio information simultaneously;

The audio playback device collects audio information played by each playback source and combines it into combined audio information; the combined audio information is subjected to noise reduction processing by the noise reduction method to obtain target audio information after noise reduction;

The target audio information is encrypted and stored in the management terminal.

Further, the step of encrypting and storing the target audio information to the management terminal includes:

When obtaining the debugging stage, each playback source plays the playback sequence of the preset audio information; wherein each playback source plays the preset audio information in sequence, and the playback order includes the names of the playback sources arranged in sequence;

Obtain a preset play source square matrix; wherein, the play source square matrix includes four rows and four columns, and each position has a name of a play source, and the name of each play source in the play source square matrix has a corresponding Square matrix serial number; the serial number consists of row number-column number;

Select the names of the three designated play sources in the play sequence, and determine the order numbers of the names of the three designated play sources in the play sequence;

In the square matrix of play sources, determine the square matrix serial numbers corresponding to the names of the three designated play sources;

Substituting the order numbers of the names of the three specified play sources in the playback sorting and the square matrix serial numbers corresponding to the names of the three specified play sources into the preset formula for calculation, and obtaining the corresponding calculation results; The calculation results are encoded and the corresponding encoded value is obtained as the encryption password;

The target audio information is encrypted based on the encryption password and stored in the management terminal.

Further, the step of encrypting and storing the target audio information to the management terminal includes:

When obtaining the debugging stage, each playback source plays the playback sequence of the preset audio information; wherein each playback source plays the preset audio information in sequence, and the playback order includes the names of the playback sources arranged in sequence;

Obtain a preset play source square matrix; wherein, the play source square matrix includes four rows and four columns, and each position has a name of a play source, and the name of each play source in the play source square matrix has a corresponding Square matrix serial number; the serial number consists of row number-column number;

Select the names of the top three playback sources in the playback order as the names of the first target playback sources;

In the square matrix of play sources, the names of all play sources except the name of the first target play source are eliminated as the names of the second target play sources; according to the name of the second target play source, the preset Sorting in the playback source matrix;

In the default play source matrix, add the names of the first target play sources to the first row in order; add the names of the second target play sources according to their names in the default play source matrix. The original sequence is inserted into the default play source square matrix to obtain the changed play source square matrix;

Determine the array serial numbers corresponding to the names of the four specified play sources in the change play source array;

The square matrix numbers corresponding to the names of the four specified playback sources are multiplied in sequence to obtain corresponding calculation results; the calculation results are encoded to obtain corresponding encoding values as encryption passwords;

The target audio information is encrypted based on the encryption password and stored in the management end.

The present invention also provides a noise reduction device for an audio playback device, which is applied to the audio playback device and includes:

The collection unit is used to collect preset audio information played by each playback source during the debugging stage of the audio playback device; wherein, each playback source is different, and the audio information played by each playback source is the same;

A generating unit, configured to generate a corresponding inverse noise reduction signal according to preset audio information of each playback source collected;

The synthesis unit is used to synthesize each reverse noise reduction signal to obtain a synthetic reverse noise reduction signal;

An analysis unit, configured to analyze the synthetic reverse noise reduction signal and obtain a signal generation method corresponding to the synthetic reverse noise reduction signal; based on the signal generation method, generate a corresponding noise reduction method as the audio playback device noise reduction method.

The present invention also provides a computer device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of any one of the above methods when executing the computer program.

The present invention also provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps of any of the above methods are implemented.

The noise reduction method, device, equipment and storage medium of audio playback equipment provided by the present invention include: during the debugging stage of the audio playback equipment, collecting preset audio information played by each playback source; wherein each playback source is different, and The audio information played by each playback source is the same; corresponding reverse noise reduction signals are generated for the collected preset audio information of each playback source; each reverse noise reduction signal is synthesized to obtain a synthetic reverse noise reduction signal; the synthesized The reverse noise reduction signal is analyzed to obtain the signal generation method corresponding to the synthetic reverse noise reduction signal; based on the signal generation method, the corresponding noise reduction method is generated as the noise reduction method of the audio playback device. In the present invention, by adopting a unified noise reduction method for different playback sources, it is avoided to adjust the noise reduction algorithm according to different playback sources.

Description of drawings

Figure 1 is a schematic diagram of the steps of a noise reduction method for audio playback equipment in an embodiment of the present invention;

FIG2 is a structural block diagram of a noise reduction device for an audio playback device according to an embodiment of the present invention;

FIG. 3 is a schematic block diagram of the structure of a computer device according to an embodiment of the present invention.

The realization of the purpose, functional features and advantages of the present invention will be further described with reference to the embodiments and the accompanying drawings.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention and are not intended to limit the present invention.

Referring to Figure 1, an embodiment of the present invention provides a noise reduction method for audio playback equipment, which is applied to the audio playback equipment. The method includes the following steps:

Step S1, in the debugging stage of the audio playback device, collecting preset audio information played by each playback source; wherein each playback source is different, and the audio information played by each playback source is the same;

Step S2: Generate corresponding reverse noise reduction signals for the collected preset audio information of each playback source;

Step S3, synthesize each reverse noise reduction signal to obtain a synthetic reverse noise reduction signal;

Step S4: Analyze the synthesized reverse noise reduction signal to obtain the signal generation method corresponding to the synthetic reverse noise reduction signal; based on the signal generation method, generate the corresponding noise reduction method as the reduction method of the audio playback device. Noise mode.

In this embodiment, as described in step S1 above, during the debugging phase of the audio playback device, it is necessary to collect each playback source and obtain the preset audio information played by them. The above playback sources can be different audio devices or different audio input channels. The audio information requirements between various playback sources are the same, that is, they must play the same audio content. But each playback source is a different audio device or a different audio input channel. By collecting the preset audio information of these playback sources, we prepare for subsequent reverse noise reduction signal generation.

As described in step S2 above, after collecting the preset audio information of each playback source, the corresponding reverse noise reduction signal is generated based on the audio information. An inverse noise reduction signal is a signal that is the opposite of the preset audio information, and its purpose is to combat or cancel the noise present in the playback source. The principle of inverse noise reduction is to eliminate or reduce the noise by synthesizing a signal that is opposite to the noise and mixing it with the audio signal of the playback source. The method of generating inverse noise reduction signals can select an appropriate noise reduction algorithm or model according to the actual situation, such as frequency domain filtering, adaptive filtering, etc. The resulting inverse denoised signal will be used for synthesis and analysis in subsequent steps.

As described in step S3 above, after the reverse noise reduction signals of each play source are generated, these reverse noise reduction signals are then synthesized. The purpose of synthesizing the reverse noise reduction signal is to combine the reverse noise reduction effects of each playback source and apply it to the noise reduction process in the playback equipment. The synthesis method can use weighted averaging, superposition, etc. to superimpose the various reverse noise reduction signals together to form a synthetic reverse noise reduction signal. The synthesized reverse noise reduction signal will include the noise reduction effect of the reverse noise reduction signals from each playback source.

As described in step S4 above, analysis needs to be performed after obtaining the synthetic inverse noise reduction signal. The purpose of the analysis is to determine how the synthetic inverse denoising signal is generated, that is, by analyzing the characteristics, spectrum, time domain and other information of the synthetic inverse denoising signal, infer how it is synthesized from each inverse denoising signal. After obtaining the signal generation method, the corresponding noise reduction method can be generated based on this method. The noise reduction method is a processing method or algorithm for a specific synthetic inverse noise reduction signal, used to reduce or eliminate noise. The generated noise reduction method will be used as the noise reduction method of the audio playback device to suppress noise when playing audio in real time. Generating corresponding noise reduction methods based on the generation method of synthetic inverse noise reduction signals can better adapt to audio playback needs under different noise conditions and provide better noise reduction effects.

In this embodiment, an inverse noise reduction signal is generated according to preset audio information of different playback sources, and a noise reduction method of a corresponding signal generation mode is obtained by analyzing and synthesizing the inverse noise reduction signal to meet the noise reduction requirements of audio playback devices under different noise conditions and improve audio quality.

In one embodiment, the step of collecting preset audio information played by each play source includes:

Control the rotating device to drive the audio playback equipment to rotate and move toward each playback source in turn; wherein, each playback source forms a circle, and the rotation device and the audio playback equipment are in the center;

When it is detected that the audio playback device is facing one of the playback sources, control the corresponding playback source to play the preset audio information;

After the corresponding playback source finishes playing the preset audio information, the rotating device is controlled to drive the audio playback device to rotate and face the next playback source.

In this embodiment, the rotating device is controlled to drive the audio playback device to rotate and move toward each playback source in turn: the audio playback device rotates through the rotation device, and the rotation device is located in the center of a circle surrounded by the playback sources. By controlling the rotating device, the audio playback device can be oriented toward different playback sources in sequence.

When the audio playback device faces a specific playback source, the corresponding playback source is controlled to play preset audio information. The playback process can be controlled by triggering the playback button of the playback source and starting the corresponding command of the playback device.

After the specific playback source finishes playing the preset audio information, the rotating device is controlled to cause the audio playback device to continue to rotate and move toward the next playback source. This step is performed in a loop until the audio playback device completes the acquisition of all playback sources.

Through the above technical solution, the preset audio information of each playback source can be collected. The control of the rotating device allows the audio playback device to easily adjust its orientation, thereby collecting audio information from different playback sources. At the same time, by gradually rotating and playing the audio, it can be ensured that the preset audio information of each playback source can be accurately and completely collected. The obtained preset audio information will be used in subsequent steps such as reverse noise reduction signal generation and noise reduction method generation.

In one embodiment, the step of generating a corresponding reverse noise reduction signal for the preset audio information of each playback source collected includes:

Extract the noise signal carried in the collected preset audio information of each playback source;

A signal completely opposite to the waveform of the noise signal is generated as the corresponding inverse noise reduction signal.

In this embodiment, first, the noise signal carried in the collected preset audio information of each play source is extracted. It can be realized by analyzing and filtering the collected audio signals. The noise signal is an interference signal mixed in the preset audio signal of the playback source, and it is the target that needs to be removed.

Then, by analyzing the extracted noise signal, the waveform characteristics of the noise signal can be obtained. Then, based on the extracted noise signal waveform characteristics, a signal completely opposite to the noise signal waveform is generated as the corresponding reverse noise reduction signal. It can be achieved through some signal processing algorithms such as waveform inversion, etc. The purpose of generating the inverse noise reduction signal is to cancel each other out with the noise signal, thereby reducing or eliminating the noise.

Through the above technical solution, the carried noise signal can be extracted based on the collected preset audio information of each playback source, and the corresponding reverse noise reduction signal can be generated. The obtained inverse noise reduction signal will have completely opposite waveform characteristics to the noise, and can be used in subsequent steps such as synthesizing the inverse noise reduction signal and generating the noise reduction method to suppress and eliminate noise in the audio.

In one embodiment, the synthetic reverse noise reduction signal is analyzed to obtain a signal generation method corresponding to the synthetic reverse noise reduction signal; based on the signal generation method, a corresponding noise reduction method is generated as the The steps for noise reduction methods for audio playback devices include:

Extract the spectral characteristics of the synthetic inverse noise reduction signal, and analyze the changing trend of the spectral characteristics;

Based on the changing trend of the frequency spectrum feature, detecting the noise type and the position of the noise frequency band present in the synthetic inverse noise reduction signal;

According to the noise type and the position of the noise frequency band, the basic principle and algorithm of noise reduction signal generation are determined; wherein the algorithm includes frequency control and phase control;

Based on the basic principles and algorithms of noise reduction signal generation, the corresponding noise reduction method is obtained by matching in the database, which is used as the noise reduction method of the audio playback device.

In this embodiment, first, spectral features, such as energy distribution, frequency band distribution, phase information, etc., are extracted from the synthesized inverse noise reduction signal. Then, these spectral features are analyzed and their changing trends are explored. The purpose of the above process is to understand the relationship between the spectral characteristics of the synthesized inverse noise reduction signal and the noise signal to determine how to reduce noise.

Then, the noise type and the position of the noise band are detected based on the changing trend of the spectrum characteristics. Spectral characteristics refer to the performance of the audio signal in the frequency domain, which can be represented by Fourier transform of the audio signal. Noise has specific characteristics in the frequency domain. For example, high-frequency noise will generate greater energy in the high-frequency band. By analyzing the changing trend of the spectral characteristics of the synthesized inverse noise reduction signal, the noise type and the location of the noise frequency band can be determined.

Then, according to the obtained noise type and the position of the noise frequency band, the basic principle and algorithm of noise reduction signal generation are determined. The basic principle of noise reduction signal generation is to use synthetic inverse noise reduction technology to generate a signal that is opposite to the noise but has the same spectral characteristics by analyzing the characteristics of the noise signal to offset the noise component in the original signal. The specific algorithm includes frequency control and phase control. Frequency control mainly adjusts the spectral distribution of the noise reduction signal to be opposite to the noise signal, and phase control adjusts the phase of the noise reduction signal according to the phase information of the noise signal to make it destructively interfere with the original signal.

Finally, the corresponding noise reduction method is obtained by matching in the database. The basic principles and algorithms of various noise reduction methods are stored in the database. According to the basic principles and algorithms of noise reduction signal generation, the most similar noise reduction method can be obtained through calculation and matching as the noise reduction method for audio playback equipment.

To sum up, the above technical solution detects the noise type and the location of the noise frequency band by analyzing the changing trend of the spectrum characteristics, and then determines the basic principles and algorithms for noise reduction signal generation based on the noise type and the location of the noise frequency band, and finally matches it with the database Obtaining the corresponding noise reduction method can achieve noise reduction effects for different noise types and frequency bands, and improve the noise reduction performance and interoperability of audio playback equipment.

In one embodiment, after the step of generating a corresponding noise reduction method based on the signal generation method as the noise reduction method of the audio playback device, the method includes:

In the use stage, control each of the playback sources to play audio information at the same time;

The audio playback device collects audio information played by each playback source and combines it into combined audio information; uses the noise reduction method to perform noise reduction processing on the combined audio information to obtain denoised target audio information;

The target audio information is encrypted and stored in the management terminal.

In this embodiment, during the use phase, the audio playback device can be connected to multiple playback sources at the same time according to needs, such as TV, radio, mobile phone, etc. Control each playback source to output audio information at the same time to ensure that audio signals from all sources can be collected.

The audio playback device collects the audio information played by each playback source and combines it into combined audio information: The audio playback device collects the audio signals output by each playback source. This can be achieved by connecting the playback source and the audio playback device through an interface, such as a microphone, HDMI, optical fiber, or other audio interface. The audio playback device combines the audio signals collected from each playback source to form combined audio information.

According to the noise reduction method obtained by the previous matching, the noise reduction method is applied to the combined audio information. The noise reduction method can be implemented according to the basic principle and algorithm of the synthetic inverse noise reduction technology. According to the algorithm of the noise reduction method, the combined audio information is processed to remove the noise component and obtain the target audio information after noise reduction.

In order to ensure the security of audio information, the target audio information is encrypted after noise reduction. Encryption can be achieved using various encryption algorithms, such as AES, RSA, etc. The encrypted target audio information can be stored in the storage medium inside the audio playback device, such as a hard disk, flash memory, etc., or transmitted to the management end for storage.

The purpose of the above steps is to perform noise reduction processing on the audio information output by the audio playback device during the use phase, and to store the noise-reduced target audio information to the management end. This provides a clearer, purer audio experience and ensures the security of audio information.

In one embodiment, the step of encrypting and storing the target audio information to the management terminal includes:

When obtaining the debugging stage, each playback source plays the playback sequence of the preset audio information; wherein each playback source plays the preset audio information in sequence, and the playback order includes the names of the playback sources arranged in sequence;

Obtain a preset play source square matrix; wherein, the play source square matrix includes four rows and four columns, and each position has a name of a play source, and the name of each play source in the play source square matrix has a corresponding Square matrix serial number; the serial number consists of row number-column number;

Select the names of the three designated play sources in the play sequence, and determine the order numbers of the names of the three designated play sources in the play sequence;

In the square matrix of play sources, determine the square matrix serial numbers corresponding to the names of the three designated play sources;

Substituting the arrangement numbers of the names of the three specified playback sources in the playback order and the square matrix numbers corresponding to the names of the three specified playback sources into a preset formula for calculation to obtain a corresponding calculation result; encoding the calculation result to obtain a corresponding encoding value as an encryption password;

The target audio information is encrypted based on the encryption password and stored in the management end.

In this embodiment, during the debugging stage, it is necessary to obtain the playback order of each playback source playing the preset audio information. The playback order refers to the order in which each playback source plays the preset audio information in sequence. For example, assuming there are three playback sources A, B, and C, the playback order may be A-B-C or C-B-A, etc. The playback order may be set during the debugging stage by setting the playback source parameters or programming scripts.

The play source square matrix is a matrix with four rows and four columns, and each position has a play source name. The purpose of the playback source matrix is to provide convenient management and control of playback sources. The rows and columns of the square matrix respectively represent the positions in the square matrix of playback sources. The name of each playback source in the square matrix of playback sources has a corresponding square matrix serial number.

The name of the above playback source will be used to calculate the encryption password. First, determine the order numbers of the names of the three specified play sources in the play sequence. For example, if the playback sequence is A-B-C, it is necessary to determine that the order numbers of A, B, and C in the sorting are 1, 2, and 3. Then, determine the array serial numbers corresponding to the three play source names in the play source array. The square matrix serial number is based on the row number and column number. For example, the square matrix serial number of A may be (2,1), the square matrix serial number of B may be (3,2), and the square matrix serial number of C may be (2,3) . By obtaining the arrangement sequence number and the square matrix sequence number, the subsequent required encryption password can be further calculated.

Then, the arrangement numbers of the names of the three specified play sources in the playback sorting and the square matrix serial numbers corresponding to the names of the three specified play sources are substituted into the preset formula for calculation, and the corresponding calculation results are obtained; for example , it can be to combine the square array serial numbers of the three play source names into numbers, multiply them by their corresponding arrangement serial numbers, and then add them together. It may also be possible to combine the square array serial numbers of the three play source names into numbers, multiply them respectively, and then multiply the multiplied results and their corresponding arrangement serial numbers in sequence.

Finally, the calculation result is encoded to obtain the corresponding encoding value as the encryption password; the encoding table used for the above encoding can be a standard encoding table, or can be obtained by transformation based on the standard encoding table; the above transformation process includes: The standard coding table includes multiple coding serial numbers and the coding characters mapped one by one for each serial number; obtain the target coding serial number corresponding to the arrangement serial number of the names of the three playback sources specified above in the standard coding table, and obtain the target coding serial number Corresponding target coded character, extract the target coded character to the specified coded character position, and translate other coded characters in sequence so that all coded character positions have corresponding coded characters, thereby obtaining the transformed coding table; the above transformation The encoding table can be used to encode the above calculation results to have strong security and uniqueness.

Finally, the target audio information is encrypted based on the encryption password and stored in the management end.

In one embodiment, the step of encrypting and storing the target audio information in a management terminal includes:

When obtaining the debugging stage, each playback source plays the playback sequence of the preset audio information; wherein each playback source plays the preset audio information in sequence, and the playback order includes the names of the playback sources arranged in sequence;

Obtain a preset play source square matrix; wherein, the play source square matrix includes four rows and four columns, and each position has a name of a play source, and the name of each play source in the play source square matrix has a corresponding Square matrix serial number; the serial number consists of row number-column number;

Select the names of the top three playback sources in the playback order as the names of the first target playback sources;

In the square matrix of play sources, the names of all play sources except the name of the first target play source are eliminated as the names of the second target play sources; according to the name of the second target play source, the names of the play sources are preset. Sorting in the playback source matrix;

In the default play source matrix, add the names of the first target play sources to the first row in order; add the names of the second target play sources according to their names in the default play source matrix. The original sequence is inserted into the default play source square matrix to obtain the changed play source square matrix;

Determine the array serial numbers corresponding to the names of the four specified play sources in the change play source matrix;

Multiply the square matrix serial numbers corresponding to the names of the four designated play sources in sequence to obtain the corresponding calculation results; encode the calculation results to obtain the corresponding coded values as encryption passwords;

The target audio information is encrypted based on the encryption password and stored in the management terminal.

In this embodiment, during the debugging phase, it is necessary to determine the playback sequence of the preset audio information played by each playback source. This means determining the position of each playback source in the playback sequence. The playback sources are played in sequence according to the preset audio information order, and the playback order consists of the playback source names arranged in sequence.

Get the source matrix: The source matrix is a 4x4 matrix with a source name at each position. Each source name in the matrix has a corresponding matrix number. The matrix number consists of a row number and a column number. For example, (1,1) represents the source in the first row and the first column.

Determine the target play source: First, select the names of the top three play sources from the play sequence as the name of the first target play source. Next, the names of all play sources except the first target play source are eliminated from the play source matrix as the second target play source. The name of the second target play source is selected according to its sorting order in the preset play source matrix. Finally, in the default play source matrix, add the name of the first target play source to the first row of the play source matrix in sequence, and add the name of the second target play source according to the name of the second target play source in the default play source matrix. The original sorting in the matrix is inserted into the changed play source square matrix to obtain a new play source square matrix, that is, the changed play source square matrix.

Determine the matrix serial numbers corresponding to the names of the four designated play sources in the changed play source matrix: Based on the changed play source matrix, determine the matrix serial numbers corresponding to the names of the four specified play sources. These square numbers will be used in the next step to calculate the encryption password.

Multiply the square matrix serial numbers corresponding to the names of the four designated play sources in sequence to obtain the corresponding calculation results: Multiply the square matrix serial numbers of the four determined play sources in sequence, and the calculation results will be used to generate encryption password.

Encode the calculation result in the previous step and convert it into the corresponding encoded value as the encryption password. Encoding is the process of converting raw data into a new form or format that protects the data.

Finally, the target audio information is encrypted using the generated encryption password. Encryption is the conversion of raw data through a specific algorithm so that it is difficult to understand or decipher by unauthorized people or systems. The encrypted audio information is stored at the management end to ensure its security and confidentiality.

Through the above steps, the security and confidentiality of the target audio information during storage and transmission are ensured. The generation and use of encryption passwords, and the application of encryption algorithms to convert the target audio information into encrypted form, so that only authorized users with the correct password can decrypt and access the target audio information; at the same time, the generation process of the above encryption password needs to be combined with the playback sequence , and the playback source square matrix is transformed into a square matrix to obtain a changed playback source square matrix, and finally the encryption password is calculated based on the changed playback source square matrix; furthermore, the calculation results need to be converted through encoding. The above process is very unique. safety and security, and improve the security of subsequent target audio information.

The coding table used for the above encoding can be a standard coding table, or can be obtained by transformation based on the standard coding table; the above transformation process includes: the standard coding table includes multiple coding serial numbers and coded characters mapped one by one for each serial number; in Obtain the target encoding sequence number corresponding to the sequence number of the names of the four specified playback sources in the standard encoding table, obtain the target encoding character corresponding to the target encoding sequence number, extract the target encoding character to the specified encoding character position, and add other The coded characters are translated sequentially so that all coded character positions have corresponding coded characters, thereby obtaining a transformed coding table; the above transformed coding table can be used to code the above calculation results to achieve strong security and unique.

Referring to Figure 2, an embodiment of the present invention also provides a noise reduction device for audio playback equipment, which is applied to the audio playback equipment and includes:

The collecting unit is used to collect preset audio information played by each playback source during the debugging stage of the audio playback device; wherein each playback source is different and the audio information played by each playback source is the same;

A generating unit, used for generating a corresponding inverse noise reduction signal according to the preset audio information of each playback source collected;

A synthesis unit, used for synthesizing the inverse noise reduction signals to obtain a synthesized inverse noise reduction signal;

An analysis unit, configured to analyze the synthetic reverse noise reduction signal and obtain a signal generation method corresponding to the synthetic reverse noise reduction signal; based on the signal generation method, generate a corresponding noise reduction method as the audio playback device noise reduction method.

In this embodiment, for the specific implementation of each unit in the above device embodiment, please refer to the above method embodiment, and will not be described again here.

Referring to FIG. 3 , an embodiment of the present invention also provides a computer device. The computer device may be a server, and its internal structure may be as shown in FIG. 3 . The computer equipment includes a processor, memory, display screen, input device, network interface and database connected through a system bus. Among them, the processor designed by the computer is used to provide computing and control capabilities. The memory of the computer device includes non-volatile storage media and internal memory. The non-volatile storage medium stores operating systems, computer programs and databases. This internal memory provides an environment for the execution of operating systems and computer programs in non-volatile storage media. The database of the computer device is used to store corresponding data in this embodiment. The network interface of the computer device is used to communicate with external terminals through a network connection. The computer program implements the above method when executed by the processor.

Those skilled in the art can understand that the structure shown in Figure 3 is only a block diagram of a partial structure related to the solution of the present invention, and does not constitute a limitation on the computer equipment to which the solution of the present invention is applied.

An embodiment of the present invention also provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the above method is implemented. It can be understood that the computer-readable storage medium in this embodiment may be a volatile readable storage medium or a non-volatile readable storage medium.

To sum up, the noise reduction method, device, equipment and storage medium for audio playback equipment provided in the embodiment of the present invention include: during the debugging stage of the audio playback equipment, collecting preset audio information played by each playback source; wherein , each playback source is different, and the audio information played by each playback source is the same; for the preset audio information of each playback source collected, the corresponding reverse noise reduction signal is generated; each reverse noise reduction signal is synthesized to obtain the synthesis Reverse noise reduction signal; analyze the synthetic reverse noise reduction signal to obtain the signal generation method corresponding to the synthetic reverse noise reduction signal; based on the signal generation method, generate the corresponding noise reduction method as the audio playback device noise reduction method. In the present invention, by adopting a unified noise reduction method for different playback sources, it is avoided to adjust the noise reduction algorithm according to different playback sources.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage. In the media, when executed, the computer program may include the processes of the above method embodiments. Any reference to memory, storage, database or other media provided and used in the embodiments of the present invention may include non-volatile and/or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual-speed data rate SDRAM (SSRSDRAM), enhanced SDRAM (ESDRAM), synchronous Link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM, etc.

It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, device, article or method including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, device, article or method. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the presence of other identical elements in the process, device, article or method including the element.

The above are only preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the description and drawings of the present invention, or directly or indirectly applied to other related The technical fields are all equally included in the scope of patent protection of the present invention.

Claims (9)

1. A noise reduction method for audio playback equipment, characterized in that it is applied to audio playback equipment, and the method includes the following steps: During the debugging phase of the audio playback device, the preset audio information played by each playback source is collected; each playback source is different, and the audio information played by each playback source is the same; Generate corresponding reverse noise reduction signals for the collected preset audio information of each playback source; Synthesize each reverse noise reduction signal to obtain a synthetic reverse noise reduction signal; The synthetic reverse noise reduction signal is analyzed to obtain the signal generation method corresponding to the synthetic reverse noise reduction signal; based on the signal generation method, the corresponding noise reduction method is generated as the noise reduction method of the audio playback device. 2. The noise reduction method for an audio playback device according to claim 1, wherein the step of collecting preset audio information played by each playback source comprises: Control the rotating device to drive the audio playback device to rotate and face each playback source in turn; wherein each playback source forms a circle, and the rotating device and the audio playback device are at the center; When it is detected that the audio playback device is facing one of the playback sources, control the corresponding playback source to play the preset audio information; After the corresponding playback source finishes playing the preset audio information, the rotating device is controlled to drive the audio playback device to rotate and face the next playback source. 3. The noise reduction method of audio playback equipment according to claim 1, characterized in that the step of generating corresponding reverse noise reduction signals for the collected preset audio information of each playback source includes: Extract the noise signal carried in the collected preset audio information of each playback source; A signal having a waveform completely opposite to that of the noise signal is generated as a corresponding reverse noise reduction signal. 4. The noise reduction method of audio playback equipment according to claim 1, characterized in that: analyzing the synthetic reverse noise reduction signal to obtain a signal generation method corresponding to the synthetic reverse noise reduction signal; based on the Describe the signal generation method and generate the corresponding noise reduction method as the steps of the noise reduction method of the audio playback device, including: Extract the spectral characteristics of the synthetic inverse noise reduction signal, and analyze the changing trend of the spectral characteristics; Based on the changing trend of the spectrum characteristics, detect the type of noise and the position of the noise frequency band existing in the synthetic inverse noise reduction signal; According to the noise type and the position of the noise frequency band, the basic principle and algorithm of noise reduction signal generation are determined; wherein the algorithm includes frequency control and phase control; Based on the basic principles and algorithms of noise reduction signal generation, the corresponding noise reduction method is obtained by matching in the database, which is used as the noise reduction method of the audio playback device. 5. The noise reduction method of audio playback equipment according to claim 1, characterized in that, after the step of generating a corresponding noise reduction method based on the signal generation method as the noise reduction method of the audio playback equipment ,include: In the use stage, control each of the playback sources to play audio information at the same time; The audio playback device collects audio information played by each playback source and combines it into combined audio information; uses the noise reduction method to perform noise reduction processing on the combined audio information to obtain denoised target audio information; The target audio information is encrypted and stored in the management terminal. 6. The noise reduction method of audio playback equipment according to claim 5, characterized in that the step of encrypting and storing the target audio information to the management terminal includes: When obtaining the debugging stage, each playback source plays the playback sequence of the preset audio information; wherein each playback source plays the preset audio information in sequence, and the playback order includes the names of the playback sources arranged in sequence; Obtain a preset play source square matrix; wherein, the play source square matrix includes four rows and four columns, and each position has a name of a play source, and the name of each play source in the play source square matrix has a corresponding Square matrix serial number; the serial number consists of row number-column number; Select the names of the three designated play sources in the play sequence, and determine the order numbers of the names of the three designated play sources in the play sequence; In the playback source matrix, determining matrix numbers corresponding to the names of the three specified playback sources; Substituting the arrangement numbers of the names of the three specified playback sources in the playback order and the square matrix numbers corresponding to the names of the three specified playback sources into a preset formula for calculation to obtain a corresponding calculation result; encoding the calculation result to obtain a corresponding encoding value as an encryption password; The target audio information is encrypted based on the encryption password and stored in the management terminal. 7. A noise reduction device for an audio player, characterized in that it is applied to the audio player, comprising: The collection unit is used to collect the preset audio information played by each playback source during the debugging stage of the audio playback device; wherein, each playback source is different, and the audio information played by each playback source is the same; A generating unit, used for generating a corresponding inverse noise reduction signal according to the preset audio information of each playback source collected; The synthesis unit is used to synthesize each reverse noise reduction signal to obtain a synthetic reverse noise reduction signal; An analysis unit, configured to analyze the synthetic reverse noise reduction signal and obtain a signal generation method corresponding to the synthetic reverse noise reduction signal; based on the signal generation method, generate a corresponding noise reduction method as the audio playback device noise reduction method. 8. A computer device, comprising a memory and a processor, and a computer program is stored in the memory, characterized in that when the processor executes the computer program, the method of any one of claims 1 to 6 is implemented. step. 9. A computer-readable storage medium with a computer program stored thereon, characterized in that when the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.