阅读说明：本技术 一种基于心理声学的声学辅助降噪方法及装置 (Acoustic auxiliary noise reduction method and device based on psychoacoustics ) 是由 陈刚 于 2019-09-29 设计创作，主要内容包括：本发明适用于声学领域,提供了一种基于心理声学的声学辅助降噪方法及装置,包括：首先获取谐波参数和时延参数；然后实时根据谐波参数和原始音频信号重建第一基频信号和与多个所述第一基频信号对应的多个第一基频谐波信号；再进行增益参数控制以获取第二基频信号和多个第二谐波信号；再进行时延调整以获取第三基频信号和多个第三基频谐波信号；最后根据所述第一基频信号、多个第一基频谐波信号、第二基频信号、多个第二基频谐波信号、第三基频信号和/或多个第三基频谐波信号获取合成信号；从而达到听觉感受的降噪,弥补空间降噪只能采取物理隔音和消噪的短板。(The invention is suitable for the field of acoustics, and provides an acoustics auxiliary noise reduction method and device based on psychoacoustics, which comprises the following steps: firstly, acquiring harmonic parameters and time delay parameters; then reconstructing a first fundamental frequency signal and a plurality of first fundamental frequency harmonic signals corresponding to the first fundamental frequency signals according to the harmonic parameters and the original audio signals in real time; then gain parameter control is carried out to obtain a second fundamental frequency signal and a plurality of second harmonic signals; then, time delay adjustment is carried out to obtain a third fundamental frequency signal and a plurality of third fundamental frequency harmonic signals; finally, obtaining a synthetic signal according to the first fundamental frequency signal, the plurality of first fundamental frequency harmonic signals, the second fundamental frequency signal, the plurality of second fundamental frequency harmonic signals, the third fundamental frequency signal and/or the plurality of third fundamental frequency harmonic signals; therefore, the noise reduction of auditory perception is achieved, and the space noise reduction is compensated by adopting a short plate which only can be used for physical sound insulation and noise elimination.)

1. A psychoacoustic-based acoustically-assisted noise reduction method, the method comprising:

acquiring harmonic parameters and time delay parameters;

reconstructing a first fundamental frequency signal and a plurality of first fundamental frequency harmonic signals corresponding to the first fundamental frequency signals according to the harmonic parameters and the original audio signal in real time;

controlling the intensity of the first fundamental frequency signal and the intensities of a plurality of first fundamental frequency harmonic signals according to a gain parameter to obtain a second fundamental frequency signal and a plurality of second harmonic signals;

adjusting the second fundamental frequency signal and the plurality of second fundamental frequency harmonic signals according to the time delay parameter to obtain a third fundamental frequency signal and a plurality of third fundamental frequency harmonic signals;

synthesizing the first fundamental frequency signal, the plurality of first fundamental frequency harmonic signals, the second fundamental frequency signal, the plurality of second fundamental frequency harmonic signals, the third fundamental frequency signal and/or the plurality of third fundamental frequency harmonic signals to obtain a synthesized signal.

2. The psychoacoustic-based acoustically-assisted noise reduction method of claim 1, wherein the reconstructing, in real-time, a first fundamental frequency signal and a plurality of first fundamental frequency harmonic signals corresponding to a plurality of the first fundamental frequency signals from the harmonic parameters and an original audio signal comprises:

carrying out transformation and FIR filtering on an original audio signal in real time to obtain a first digital signal to be processed;

decomposing the first digital signal to obtain a plurality of corresponding frequency spectrums and frequency signal amplitudes corresponding to the frequency spectrums in a one-to-one mode, and detecting the fundamental frequency of the first digital signal;

and regenerating a first fundamental frequency signal corresponding to the fundamental frequency and a plurality of first fundamental frequency harmonic signals corresponding to the first fundamental frequency signal by a signal generator according to the fundamental frequency, the harmonic parameters and the frequency signal amplitudes.

3. The psychoacoustic-based acoustically-assisted noise reduction method of claim 1, wherein the controlling the intensity of the first fundamental frequency signal and the intensity of the plurality of first fundamental frequency harmonic signals according to the gain parameter to obtain the second fundamental frequency signal and the plurality of second harmonic signals further comprises:

and carrying out amplitude detection on the original audio signal to obtain the gain parameter.

4. The psychoacoustic-based acoustically-assisted noise reduction method of claim 1, wherein the reconstructing a first fundamental frequency signal and a plurality of first fundamental frequency harmonic signals corresponding to a plurality of the first fundamental frequency signals from the harmonic parameters and an original audio signal in real-time further comprises, before:

performing envelope detection on the original audio signal in real time to generate an envelope signal;

judging whether a synthetic signal is acquired or not according to the envelope signal;

and if a synthetic signal is judged to be acquired according to the envelope signal, executing the step of reconstructing a first fundamental frequency signal and a plurality of first fundamental frequency harmonic signals corresponding to the plurality of first fundamental frequency signals according to the harmonic parameters and the original audio signal in real time.

And if the composite signal is judged not to be acquired according to the envelope signal, ending the flow step.

5. The psychoacoustic-based acoustic assisted noise reduction method of claim 1, wherein the synthesizing the first fundamental frequency signal, the plurality of first fundamental frequency harmonic signals, the second fundamental frequency signal, the plurality of second fundamental frequency harmonic signals, the third fundamental frequency signal, and/or the plurality of third fundamental frequency harmonic signals to obtain a synthesized signal further comprises:

convolving the psychomasking signal and the synthesized signal to generate a target audio signal.

6. A psychoacoustic-based acoustically-assisted noise reduction apparatus, comprising:

the harmonic parameter acquisition module is used for acquiring a harmonic parameter and a time delay parameter;

the first fundamental frequency signal acquisition module is used for reconstructing a first fundamental frequency signal and a plurality of first fundamental frequency harmonic signals corresponding to the first fundamental frequency signals according to the harmonic parameters and the original audio signal in real time;

the second fundamental frequency signal acquisition module is used for controlling the intensity of the first fundamental frequency signal and the intensities of the first fundamental frequency harmonic signals according to a gain parameter so as to acquire a second fundamental frequency signal and a plurality of second harmonic signals;

a third fundamental frequency signal obtaining module, configured to adjust the second fundamental frequency signal and the plurality of second fundamental frequency harmonic signals according to the time delay parameter to obtain a third fundamental frequency signal and a plurality of third fundamental frequency harmonic signals;

a synthesis module, configured to synthesize the first fundamental frequency signal, the plurality of first fundamental frequency harmonic signals, the second fundamental frequency signal, the plurality of second fundamental frequency harmonic signals, the third fundamental frequency signal, and/or the plurality of third fundamental frequency harmonic signals to obtain a synthesized signal.

7. The psychoacoustic-based acoustically-assisted noise reduction device according to claim 6, wherein the first fundamental frequency signal obtaining module comprises:

the first digital signal acquisition module is used for carrying out transformation and FIR filtering on an original audio signal in real time so as to acquire a first digital signal to be processed;

a fundamental frequency detection module, configured to decompose the first digital signal to obtain a plurality of frequency spectrums and frequency signal amplitudes corresponding to the frequency spectrums, and detect a fundamental frequency of the first digital signal;

and the first fundamental frequency signal generating module is used for regenerating a first fundamental frequency signal corresponding to the fundamental frequency and a plurality of first fundamental frequency harmonic signals corresponding to the first fundamental frequency signal by the signal generator according to the fundamental frequency, the harmonic parameters and the frequency signal amplitudes.

8. The psychoacoustic-based acoustically assisted noise reduction device of claim 6, further comprising:

and the gain parameter acquisition module is used for carrying out amplitude detection on the original audio signal so as to acquire the gain parameter.

9. The psychoacoustic-based acoustically assisted noise reduction device of claim 6, further comprising:

the envelope detection module is used for carrying out envelope detection on the original audio signal in real time to generate an envelope signal;

the judging module is used for judging whether to acquire a synthesized signal according to the envelope signal;

and if the judging module judges to acquire the synthetic signal according to the envelope signal, triggering a first fundamental frequency signal acquiring module.

And if the judging module judges that the synthetic signal is not acquired according to the envelope signal, ending the flow step.

10. The psychoacoustic-based acoustically assisted noise reduction device of claim 9, further comprising:

a convolution module to convolve the psychomasking signal with the synthesized signal to generate a target audio signal.

11. A psycho-acoustic based acoustically assisted noise reduction apparatus comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor realizes the steps of the psycho-acoustic based acoustically assisted noise reduction method according to any one of claims 1 to 5 when executing the computer program.

12. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the psycho-acoustic based acoustically assisted noise reduction method according to any one of claims 1 to 5.

Technical Field

The invention belongs to the field of acoustics, and particularly relates to an acoustics auxiliary noise reduction method and device based on psychoacoustics.

Background

The noise problem is important pollution in modern society, seriously harms the health of people and influences normal life, study and work. Sound insulation and noise reduction are important links in construction. The current solution is to use an enclosure to limit the sound emitted from the sound source to a range or to use a special isolation structure in the way of sound wave propagation, increasing the propagation loss of sound energy, thereby achieving the purpose of reducing noise.

At present, noise control in the industry mainly adopts a sound insulation means of shielding treatment aiming at a noise source, a sound insulation member is manufactured by using physical sound insulation materials according to different structural forms, and the sound insulation member mainly utilizes the transmission coefficient difference of incident sound in materials with different densities to enable sound energy to generate sharp attenuation in the transmission process so as to play a role in cutting off noise propagation. However, different materials have large structural differences, different requirements on the environment of a space are limited, and each sound insulation member has large sound insulation quantity difference of each frequency of sound, and usually has large middle-high frequency sound insulation quantity and low frequency sound insulation quantity. Sound insulation at low frequencies is a difficult problem for traditional environmental sound insulation.

There are Active Noise reduction techniques currently used in the industry, and for applications with a constant listening position, such as earphone applications, sound generating units using Active Noise Control (Active Noise reduction) Noise reduction techniques use a phase cancellation technique to cancel out the external Noise by generating reverse spectral energy, thereby reducing the interference effect of the Noise on the listening from the perspective of the individual listener. The limitation of this technique is that it is only effective for the individual and requires the corresponding equipment to be worn, temporarily without effective application in the environment.

The traditional psychoacoustic-based acoustic auxiliary noise reduction method needs to adopt physical sound insulation and noise reduction, so a new psychoacoustic-based acoustic auxiliary noise reduction method which is effectively applied in the environment is needed.

Disclosure of Invention

In view of this, embodiments of the present invention provide a method and an apparatus for acoustic assisted noise reduction based on psychoacoustics, which aim to solve the problem that physical sound insulation and noise cancellation are required in the prior art.

The first aspect of the embodiments of the present invention provides a method for acoustic auxiliary noise reduction based on psychoacoustics, including:

acquiring harmonic parameters and time delay parameters;

reconstructing a first fundamental frequency signal and a plurality of first fundamental frequency harmonic signals corresponding to the first fundamental frequency signals according to the harmonic parameters and the original audio signal in real time;

controlling the intensity of the first fundamental frequency signal and the intensities of a plurality of first fundamental frequency harmonic signals according to a gain parameter to obtain a second fundamental frequency signal and a plurality of second harmonic signals;

adjusting the second fundamental frequency signal and the plurality of second fundamental frequency harmonic signals according to the time delay parameter to obtain a third fundamental frequency signal and a plurality of third fundamental frequency harmonic signals;

synthesizing the first fundamental frequency signal, the plurality of first fundamental frequency harmonic signals, the second fundamental frequency signal, the plurality of second fundamental frequency harmonic signals, the third fundamental frequency signal and/or the plurality of third fundamental frequency harmonic signals to obtain a synthesized signal.

A second aspect of an embodiment of the present invention provides a psychoacoustics-based acoustic auxiliary noise reduction apparatus, including:

the harmonic parameter acquisition module is used for acquiring a harmonic parameter and a time delay parameter;

the first fundamental frequency signal acquisition module is used for reconstructing a first fundamental frequency signal and a plurality of first fundamental frequency harmonic signals corresponding to the first fundamental frequency signals according to the harmonic parameters and the original audio signal in real time;

the second fundamental frequency signal acquisition module is used for controlling the intensity of the first fundamental frequency signal and the intensities of the first fundamental frequency harmonic signals according to a gain parameter so as to acquire a second fundamental frequency signal and a plurality of second harmonic signals;

a third fundamental frequency signal obtaining module, configured to adjust the second fundamental frequency signal and the plurality of second fundamental frequency harmonic signals according to the time delay parameter to obtain a third fundamental frequency signal and a plurality of third fundamental frequency harmonic signals;

a synthesis module, configured to synthesize the first fundamental frequency signal, the plurality of first fundamental frequency harmonic signals, the second fundamental frequency signal, the plurality of second fundamental frequency harmonic signals, the third fundamental frequency signal, and/or the plurality of third fundamental frequency harmonic signals to obtain a synthesized signal.

A third aspect of the embodiments of the present invention provides a psycho-acoustic-based acoustically-assisted noise reduction apparatus, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the steps of the psycho-acoustic-based acoustically-assisted noise reduction method when executing the computer program.

A fourth aspect of embodiments of the present invention provides a computer-readable storage medium, which stores a computer program, which when executed by a processor, implements the steps of the psychoacoustic-based acoustically-assisted noise reduction method described above.

Compared with the prior art, the embodiment of the invention has the following beneficial effects: the digital audio processing technology is matched with human spatial auditory psychology, the digital audio processing technology is integrated into the existing sound amplification system, the existing sound amplification system is used for generating sound source signals, the purpose of noise reduction of human psychological auditory perception of spatial auditory sense is achieved, and the defect that the spatial noise reduction can only adopt short plates for physical sound insulation and noise reduction is overcome.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic flow chart of an implementation of a psychoacoustic-based acoustic auxiliary noise reduction method according to an embodiment of the present invention;

fig. 2 is a schematic flow chart of another implementation of a psychoacoustic-based acoustic auxiliary noise reduction method according to an embodiment of the present invention;

fig. 3 is a schematic flow chart of another implementation of a psychoacoustic-based acoustic auxiliary noise reduction method according to an embodiment of the present invention;

fig. 4 is a schematic flow chart of another implementation of a psychoacoustic-based acoustic auxiliary noise reduction method according to an embodiment of the present invention;

fig. 5 is a schematic diagram of a psycho-acoustic-based acoustically-assisted noise reduction apparatus according to an embodiment of the present invention;

fig. 6 is another schematic diagram of a psycho-acoustic-based acoustically-assisted noise reduction apparatus according to an embodiment of the present invention;

fig. 7 is another schematic diagram of a psycho-acoustic-based acoustically-assisted noise reduction apparatus according to an embodiment of the present invention;

fig. 8 is another schematic diagram of a psycho-acoustic-based acoustically-assisted noise reduction apparatus according to an embodiment of the present invention;

fig. 9 is a schematic diagram of a first baseband signal obtaining module of the psychoacoustic-based acoustic auxiliary noise reduction apparatus according to the embodiment of the present invention;

fig. 10 is another schematic diagram of an acoustic auxiliary noise reduction apparatus based on psychoacoustics according to an embodiment of the present invention.

Detailed Description

In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

In order to explain the technical means of the present invention, the following description will be given by way of specific examples.

Fig. 1 shows an implementation flow of a psychoacoustic-based acoustic auxiliary noise reduction method provided by an embodiment of the present invention, and for convenience of description, only parts related to the embodiment of the present invention are shown, which are detailed as follows:

in step 101, a harmonic parameter and a time delay parameter are acquired.

Step 101 may specifically be: and acquiring the harmonic parameters and the time delay parameters input by the user.

The time delay parameter is set according to the wavelengths of the fundamental frequency signal and the fundamental frequency harmonic signal and the number of reflection times in space, and the smaller the wavelength is, the smaller the time delay is.

In step 102, a first fundamental frequency signal and a plurality of first fundamental frequency harmonic signals corresponding to the plurality of first fundamental frequency signals are reconstructed in real time from the harmonic parameters and the original audio signal.