阅读说明：本技术 一种数字辅助隔音处理的方法及装置 (Method and device for digital auxiliary sound insulation treatment ) 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,提供了一种数字辅助隔音处理的方法及装置,包括：首先获取声源相位参数、心理声学参数；然后根据心理声学参数对与多个通道一一对应的多个原始音频信号进行心理声学处理以获取多个第一目标音频信号；最后根据声源相位参数对多个第一目标音频信号进行相位调整以确定多个第二目标音频信号；故通过使用数字音频处理技术和人类空间听觉心理相配合,集成到现有的扩声系统中,利用现有扩声系统生成声源信号,达到空间听觉的人类心理听觉感受的降噪目的,弥补了空间降噪只能采取物理隔音、消噪的短板。(The invention is suitable for the field of acoustics, and provides a method and a device for digital auxiliary sound insulation treatment, wherein the method comprises the following steps: firstly, acquiring a sound source phase parameter and a psychoacoustic parameter; then performing psychoacoustic processing on a plurality of original audio signals corresponding to the plurality of channels one by one according to the psychoacoustic parameters to obtain a plurality of first target audio signals; finally, carrying out phase adjustment on the plurality of first target audio signals according to the sound source phase parameters to determine a plurality of second target audio signals; therefore, the digital audio processing technology is matched with human spatial auditory psychology and is integrated into the existing sound amplifying system, the existing sound amplifying system is utilized to generate sound source signals, the purpose of noise reduction of human psychological auditory perception of spatial auditory perception is achieved, and the defect that the spatial noise reduction can only adopt a short plate for physical sound insulation and noise reduction is overcome.)

1. A method of digitally assisting sound insulation, the method comprising:

acquiring sound source phase parameters and psychoacoustic parameters;

performing psychoacoustic processing on a plurality of original audio signals corresponding to a plurality of channels one by one according to the psychoacoustic parameters to obtain a plurality of first target audio signals;

and performing phase adjustment on the plurality of first target audio signals according to the sound source phase parameters to determine a plurality of second target audio signals.

2. A method of digitally assisted sound insulation processing according to claim 1, wherein said psychoacoustically processing a plurality of original audio signals in one-to-one correspondence with a plurality of channels according to the psychoacoustic parameters to obtain a plurality of first target audio signals comprises:

converting the original audio signal into a plurality of original sub-frequency domain signals through a plurality of filters;

determining a plurality of first sub-frequency domain signals according to a plurality of the original sub-frequency domain signals and a plurality of sub-frequency domain audible noise thresholds;

obtaining a plurality of sub-frequency domain difference signals according to the plurality of original sub-frequency domain signals and the plurality of first sub-frequency domain signals;

obtaining a plurality of sub-frequency domain compensation signals according to the psychoacoustic parameters, the plurality of sub-frequency domain difference signals and a psychoacoustic model;

acquiring a plurality of sub-frequency domain mixed signals according to the plurality of sub-frequency domain compensation signals and the plurality of first sub-frequency domain signals;

and performing convolution synthesis on the plurality of sub-frequency domain mixed signals to obtain a first target audio signal.

3. A method of digitally assisted sound insulation processing according to claim 2, wherein said deriving a plurality of sub-frequency domain compensation signals from said psychoacoustic parameters, a plurality of said sub-frequency domain difference signals and a psychoacoustic model comprises:

performing envelope detection on a plurality of the sub-frequency domain difference signals to generate a plurality of envelope signals;

determining a plurality of the sub-frequency domain compensation signals according to the psychoacoustic model, the plurality of envelope signals, the psychoacoustic parameters, and the plurality of sub-frequency domain difference signals.

4. A method of digitally assisting sound insulation processing according to claim 2, wherein said determining a first plurality of sub-frequency domain signals from a plurality of said original sub-frequency domain signals and a plurality of sub-frequency domain audible noise thresholds comprises:

judging whether the original sub-frequency domain signal is larger than the sub-frequency domain audible noise threshold value or not;

if the original sub-frequency domain signal is larger than the sub-frequency domain audible noise threshold, setting the sub-frequency domain audible noise threshold as the first sub-frequency domain signal;

and if the original sub-frequency domain signal is not larger than the sub-frequency domain audible noise threshold, setting the original sub-frequency domain signal as the first sub-frequency domain signal.

5. A method of digitally assisting sound insulation processing according to claim 2 wherein said phase adjusting a plurality of said first target audio signals to determine a plurality of second target audio signals according to a sound source phase parameter comprises:

detecting spatial acoustic features through a fully directional sound source; the space acoustic characteristics are the relation among space coordinates, space reverberation time, space frequency response characteristics, distribution of sound field and frequency of sound energy;

and adjusting the phase of the sound source according to the spatial acoustic characteristics to acquire a plurality of second target audio signals so as to enable the distribution of the sound energy of the target listening area to be in a preset range.

6. An apparatus for digitally assisting sound insulation processing, comprising:

the sound source phase parameter acquisition module is used for acquiring sound source phase parameters and psychoacoustic parameters;

the first target audio signal acquisition module is used for performing psychoacoustic processing on a plurality of original audio signals corresponding to a plurality of channels one by one according to the psychoacoustic parameters to acquire a plurality of first target audio signals;

and the second target audio signal determining module is used for carrying out phase adjustment on the plurality of first target audio signals according to the sound source phase parameter so as to determine a plurality of second target audio signals.

7. The digitally assisted sound insulation treatment apparatus according to claim 6, wherein the first target audio signal acquisition module comprises:

an original sub-frequency domain signal conversion module for converting an original audio signal into a plurality of original sub-frequency domain signals through a plurality of filters;

a first sub-frequency domain signal determining module for determining a plurality of first sub-frequency domain signals according to a plurality of the original sub-frequency domain signals and a plurality of sub-frequency domain audible noise thresholds;

a sub-frequency domain difference signal obtaining module, configured to obtain a plurality of sub-frequency domain difference signals according to the plurality of original sub-frequency domain signals and the plurality of first sub-frequency domain signals;

the sub-frequency domain compensation signal acquisition module is used for acquiring a plurality of sub-frequency domain compensation signals according to the psychoacoustic parameters, the plurality of sub-frequency domain difference signals and a psychoacoustic model;

a sub-frequency domain mixed signal obtaining module, configured to obtain a plurality of sub-frequency domain mixed signals according to the plurality of sub-frequency domain compensation signals and the plurality of first sub-frequency domain signals;

and the convolution module is used for performing convolution synthesis on the plurality of sub-frequency domain mixed signals to obtain a first target audio signal.

8. The digitally assisted sound insulation treatment apparatus of claim 7, wherein the sub-frequency domain compensation signal acquisition module comprises:

an envelope detection module for performing envelope detection on a plurality of said sub-frequency domain difference signals to generate a plurality of envelope signals;

and the sub-frequency domain compensation signal determining module is used for determining a plurality of sub-frequency domain compensation signals according to the psychoacoustic model, the plurality of envelope signals, the psychoacoustic parameters and the plurality of sub-frequency domain difference signals.

9. The digitally assisted sound insulation treatment apparatus of claim 7, wherein the first sub-frequency domain signal determining module comprises:

the judging module is used for judging whether the original sub-frequency domain signal is larger than the sub-frequency domain audible noise threshold value or not;

the first setting module is used for setting the sub-frequency domain audible noise threshold as the first sub-frequency domain signal if the judging module judges that the original sub-frequency domain signal is larger than the sub-frequency domain audible noise threshold;

and the second setting module is used for setting the original sub-frequency domain signal as the first sub-frequency domain signal if the judging module judges that the original sub-frequency domain signal is not larger than the sub-frequency domain audible noise threshold value.

10. The digitally assisted sound insulation treatment apparatus according to claim 6, wherein the second target audio signal determination module comprises:

the space acoustic feature detection module is used for detecting space acoustic features through a full-directional sound source; the space acoustic characteristics are the relation among space coordinates, space reverberation time, space frequency response characteristics, distribution of sound field and frequency of sound energy;

and the phase adjusting module is used for adjusting the phase of the sound source according to the space acoustic characteristics to acquire a plurality of second target audio signals so as to enable the distribution of the sound energy of the target listening area to be in a preset range.

11. An apparatus for digitally assisting sound insulation treatment, comprising a memory, a processor and a computer program stored in said memory and executable on said processor, characterized in that said processor, when executing said computer program, carries out the steps of a method for digitally assisting sound insulation treatment according to any one of claims 1 to 5.

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 method of digitally assisted acoustic treatment according to any one of claims 1 to 5.

Technical Field

The invention belongs to the field of acoustics, and particularly relates to a method and a device for digital auxiliary sound insulation treatment.

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 method of digital auxiliary sound insulation processing can only adopt physical sound insulation and noise elimination to reduce the noise in space, so a new method of digital auxiliary sound insulation processing which is effectively applied in the environment is urgently needed.

Disclosure of Invention

In view of this, the embodiment of the present invention provides a method and an apparatus for digitally assisted sound insulation processing, which aim to solve the problem that in the prior art, spatial noise reduction can only adopt physical sound insulation and noise elimination.

A first aspect of an embodiment of the present invention provides a method of digitally assisted sound insulation treatment, comprising:

acquiring sound source phase parameters and psychoacoustic parameters;

performing psychoacoustic processing on a plurality of original audio signals corresponding to a plurality of channels one by one according to the psychoacoustic parameters to obtain a plurality of first target audio signals;

and performing phase adjustment on the plurality of first target audio signals according to the sound source phase parameters to determine a plurality of second target audio signals.

A second aspect of an embodiment of the present invention provides an apparatus for digitally assisting sound insulation treatment, comprising:

the sound source phase parameter acquisition module is used for acquiring sound source phase parameters and psychoacoustic parameters;

the first target audio signal acquisition module is used for performing psychoacoustic processing on a plurality of original audio signals corresponding to a plurality of channels one by one according to the psychoacoustic parameters to acquire a plurality of first target audio signals;

and the second target audio signal determining module is used for carrying out phase adjustment on the plurality of first target audio signals according to the sound source phase parameter so as to determine a plurality of second target audio signals.

A third aspect of an embodiment of the present invention provides an apparatus for digitally assisting sound insulation treatment, comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the steps of the method for digitally assisting sound insulation treatment described above when executing the computer program.

A fourth aspect of embodiments of the present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, carries out the steps of the method of digitally assisted acoustic treatment 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 one implementation of a method of digitally assisted sound insulation treatment provided by an embodiment of the present invention;

FIG. 2 is a schematic flow chart of another implementation of a method of digitally assisted sound insulation treatment provided by an embodiment of the present invention;

FIG. 3 is a schematic view of a digitally assisted sound damping treatment apparatus provided by an embodiment of the present invention;

FIG. 4 is another schematic view of a digitally assisted sound damping treatment apparatus provided by an embodiment of the present invention;

FIG. 5 is a schematic diagram of a first target audio signal acquisition module of the apparatus for digitally assisted acoustic treatment according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a sub-frequency domain compensation signal acquisition module of the digitally assisted sound insulation processing apparatus according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a first sub-frequency domain signal determining module of the digitally assisted sound insulation processing apparatus according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of a second target audio signal determination module of the apparatus for digitally assisted sound insulation processing provided by an embodiment of the present invention;

fig. 9 is another schematic view of a digitally assisted sound damping treatment apparatus 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 a flow of implementing the method of digitally assisted sound insulation processing provided by the embodiment of the present invention, and for convenience of description, only the parts related to the embodiment of the present invention are shown, and the following details are described below:

in step 101, sound source phase parameters and psychoacoustic parameters are acquired.

Step 101 specifically comprises: and acquiring a sound source phase parameter and a psychoacoustic parameter input by a user.

The sound source phase parameters comprise a relative phase difference parameter table of a room sound source and a relative interference and elimination relation table of early sound wave and reflected wave phases within 35 ms. The psychoacoustic parameters include harmonic parameters and spatial reflection delay parameters.

In step 102, a plurality of original audio signals corresponding to a plurality of channels one to one are psychoacoustically processed according to psychoacoustic parameters to obtain a plurality of first target audio signals. A channel refers to a digital sound source signal channel.