TW202143747A - System and method for generating a 3d spatial sound field - Google Patents

Abstract

A system for generating a 3d spatial sound field includes a space/environmental sound wave input unit for receiving and converting sound waves into separated digital signals, a binaural signal processing unit comparing the converted digital sound signals and separating them again using binaural signal processing technology, a digital operation analysis unit receiving the converted digital signals and performing 3d calculation, analysis, real-time calculation, distribution, processing, DA conversion, and AD conversion, and a three-dimensional signal calculation and comparison unit for calculating and optimizing the signals output by the digital operation analysis unit, and then distributing the processed signal to a sound signal playing system for generating reconstructed sound field.

Description

Three-dimensional sound field generation system and method

The present invention relates to the technical field of three-dimensional sound field generation, more specifically, it relates to a system and method for three-dimensional sound field generation.

With the development and application of technology, the demand and application of sound products in the market nowadays has increased year by year. In order to respond to the ever-changing consumer demand in the market, it is necessary for the consumer market to introduce new application technologies and add different technical conditions to increase new listening experience. To achieve the above conditions, the coupling of electro-acoustic sound and space is an important topic for discussion. In the design, the focus is not only on the system characteristics and capabilities of the sound product, but more importantly, considering the impact of the interaction between the system in the sound product and the actual environmental acoustics. , In order to design the characteristic performance of the actual listening experience between different positions and angles of the two ears in the environment that is closer to the human.

In addition to improving the sound field environment and sound dynamic performance, 3D spatial sound field technologies (3D spatial sound field technologies) can approach the actual spatial sound field in the context of actual listening. In recent years, due to the vigorous development of 360-degree videos and VR/AR/MR, everyone has turned their heads back to seek help in field reception, format analysis/quantization, processing, reconstruction, etc. of the immersive sound field, in order to be able to To achieve natural sound on headphones or various speaker layouts, one of the keys is to calculate the direct sound and the primary, secondary, and tertiary reflected sound that the sound source should hear in a wide-area 3D space, corresponding to The distance and azimuth between the listener's ears and the sound source changes, and the front-end calculation results are presented on the back-end listening system in real time.

The three-dimensional sound field is essentially a more scientific expression of the immersive sound field. Generally speaking (in some definitions), these two names can be used interchangeably, but the three-dimensional sound field is one A relatively more accurate term. In three-dimensional sound/ambient stereo, the sound can be positioned at any position in the sphere with the listener as the center of the sphere, by encoding on four channels-three channels for front/rear, left/right, and There is also an "omnidirectional" channel for up/down direction information. In the stereo playback environment, it must be decoded before it can be played on a specific playback system. This system can be a DTS:X home theater system, or a traditional 5.1-channel surround device, or even a regular headset or multiple Array speaker system. In addition, the realization of immersive audio technology has nothing to do with the speakers, which means that people only need to make simple adjustments to the mix to play back on different audio systems. For the immersive sound field technology, we can not only use it in the sound system of the movie theater, but also play back the same mix on a smart speaker network, or even ordinary headphones, while retaining spatial information at the same time.

In view of the high price of high-end audio products on the market at present, there is still much room for reasonable prices on high-quality products. The present invention proposes an innovative three-dimensional sound field generation system and method that can be applied to miniaturized audio products. The technology of adjusting the optimal listening range, regardless of the sound field environment conditions, the design proposed by the present invention can form a sound field with multiple speakers to establish a complete sound localization. By automatically adjusting and processing the environmental sound field, it can simulate the creation of the original sound field. The auditory experience allows the audience to have a near-optimal listening effect in different environments.

The present invention provides a three-dimensional sound field generation system, including: a space/ambient sound wave input unit for receiving sound waves in space and environment and converting them into digital format signals; a binaural signal processing unit for receiving the sound waves Convert the separated digital signal and compare and separate the signal according to the binaural signal processing technology; a digital arithmetic analysis unit includes a digital audio signal processor and a digital signal processor, where the digital audio signal processor is used In order to receive the converted and separated digital signal and perform three-dimensional calculation and analysis on it, the digital signal processor is used to receive the signal input by the binaural signal processing unit and the digital audio signal processor for real-time calculation, distribution, processing, Digital-to-analog conversion and analog-to-digital conversion; and a three-dimensional signal calculation and comparison unit, used to calculate and optimize the signal comparison and automatic adjustment of the signal output by the digital calculation analysis unit, and then compare the processed signal after the comparison Assigned to a sound signal playback system to generate reconstruction Sound field.

The above-mentioned three-dimensional sound field generation system further includes a live audio source recording calculation and comparison unit for recording the live performance audio source or signal through a live three-dimensional recording device, and the recorded signal and the above-mentioned calculation optimization signal Signals are compared and automatically adjusted, and then the compared processing signals are distributed to the above-mentioned sound signal playback system to generate a reconstructed sound field.

The above-mentioned binaural signal processing unit is based on binaural signal processing technologies such as interaural level difference (IDT), interaural time difference (ILD), head related transform function (HRTF), etc. , To compare the input signal in digital form, and separate again to convert the complicated spatial mixing into left and right sound channels.

The above-mentioned sound signal playback system includes a three-dimensional speaker array.

The present invention provides a method for generating a three-dimensional sound field, which includes: receiving sound waves in space and environment through a sound wave input unit and converting them into digital signals; using a binaural signal processing unit to process the digital signals in binaural signals; The arithmetic analysis unit performs three-dimensional calculation; and uses the three-dimensional signal calculation and comparison unit to perform optimized signal comparison of the digital signal, and then distributes the digital signal to a sound signal playback system to generate a reconstructed sound field.

100: System architecture for generating three-dimensional sound field

10: Sound waves

101: Space/Ambient Sound Wave Input Unit

101a: Array microphone

101b:WXYZ

101c: Decoder

102: Binaural signal processing unit

103: Digital Operation Analysis Unit

103a: Digital Audio Signal Processor (DAFX)

103b: Digital Signal Processor (DSP)

104: 3D signal calculation and comparison unit

105: On-site audio source recording calculation and comparison unit

105a: On-site 3D recording device

105b: 3D processor (3D processor)

106: Distributor

107: Playback system (3D array speaker)

109: 3D headset

111: E-sports system

113: 3D personal consumer products

115: 3D Home Theater

117: Live Performance

Figure 1 shows the characteristics of the three-dimensional sound field generation system of the present invention, and a schematic diagram of the remote playback technology.

Figure 2 shows a schematic diagram of the three-dimensional sound field generation system of the present invention using the AI data analysis function to assist in achieving the sound field restoration technology.

Figure 3 shows how the three-dimensional sound field generating system of the present invention increases the sound field range of the sound field and its direction control.

Figure 4 shows a schematic diagram of the three-dimensional sound field generation system of the present invention using multiple or multiple sets of acoustic units or arrays of speakers to increase the sound field range and direction of the sound field.

Figure 5 shows a functional block diagram of the system architecture for generating a three-dimensional sound field of the present invention.

This specification only describes the essential elements of the present invention, and is only used to illustrate the possible embodiments of the present invention. However, the description in the specification should not limit the scope of rights of the technical essence claimed by the present invention.

It should also be understood that the current descriptions are only possible embodiments of the present invention. In the implementation or testing of the present invention, any method, process, function, or method similar or equivalent to the device or system described in this specification can be used. means. Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those familiar with the technical field to which the present invention belongs. The current descriptions in this manual are only examples of methods, processes and related materials. However, in actual use of the present invention, any methods and means similar or equivalent to the methods and materials described in this specification can be used.

Furthermore, the number of one mentioned in this specification above or below includes the number itself. And it should be understood that this specification discloses certain methods and processes for performing the disclosed functions, and there are multiple structures related to the disclosed structure that can perform the same function, and the above-mentioned structures can usually achieve the same result.

Hereinafter, preferred embodiments of the present invention will be described in detail to fully illustrate the characteristics, spirit, and advantages of the present invention.

Regarding the establishment and application of 3D spatial sound technologies (3D spatial sound technologies), the principle is to use the mathematical operation analysis provided by the Finite Element Method (FEM) method to divide the space into finite under certain boundary conditions. The number of tiny elements (tiny volume), using the wave equation

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Helmholtz equation ▽ ² f =- k ² f (2) is a basic calculation to find the characteristics of the sound field and its sound field diffusion behavior in space, and add boundary conditions (Boundary element method (BEM)) to calculate the Helmholtz equation Converted into boundary integral equation for further characteristic analysis, and the pressure and velocity of the sound wave can be solved on the boundary, and then the pressure and the pressure of the sound field of the sound wave can be calculated at any point in the space hypothesis or prediction and evaluation in the formula. Frequency domain, phase. Then, based on the space, each frequency domain will produce different sound phenomena, such as standing waves, in different spatial geometries, volumes, and shapes. The position of the listener at different points will change with the position of the listener, resulting in a change in the sound experience. Therefore, it is necessary to consider the spatial geometric conditions for calculation analysis. And because in 3D space, the sound will change due to various behaviors (for example, standing wave attenuation, various wave reverberation times due to standing waves in the diffuse sound field), and this change affects the perception of listening and forms time residuals. Reverberation Time. This type of influence must also be considered in the three-dimensional sound field algorithm.

When the above-mentioned field is picked up and calculated by software (considering the spatial geometry and analyzing the reverberation time of various waves), it includes analysis/quantization, processing, and then conversion and separation into digital formats, and then the need for wave field synthesis technology (Wave Field Synthesis) To complete the synthesis of sound waves at the listening position, it should be considered that they should have the same phase, energy, and sound pressure, which is important for the establishment of a 3D sound field. From the perspective of the technology of the present invention, the consideration elements include: increasing the sound field range of the sound field and the control of its direction, positioning and calculation between the positioning calculation through the scene playback and the number of software and speakers, and considering the binaural effect (Binaural effect) Affects and controls the virtual and actual sound source positions heard by the listener.

For the analysis of 3D spatial sound technologies (3D spatial sound technologies), a site description, such as a concert hall, where sound is sent through a speaker system, the sound waves produce diffusion, reflection, refraction, diffraction, etc. in this space. These sound wave behaviors Will change the auditory perception of sound in this space. The basis of this technology is the use of sound receiving systems, such as microphones, sensors, and signal receivers, to receive sound, and some processing equipment to convert the sound into electrical signals. We then use software or computational formulas to transmit electrical signals to the sound. Perform analysis.

The signal analyzed by software or calculation formula is preliminarily processed by this technology, that is, automatic detection, which can quickly separate and determine the information of the sound in this space (such as a concert hall), such as: Loudness, sound pressure level With frequency (Level and Frequency), spatial impulse response, reflected energy direction, critical distance, time reverberation (Reverberation Time), sound energy ratio, echo (Echo), early decay time (Early Decay Time, EDT), D50 (50ms) The ratio of the early sound energy to the total sound energy reached within), TS (gravity time of impulse response squared), C80 (sound field clarity), ITDG (initial delay gap)...etc. Using the information obtained, we can store it in a digital signal calculation format, such as C language code or any other software program that can process sound signals. In addition, we can go to various space venues (such as concert halls, national theaters, large outdoor concert venues, etc.) to obtain more information about the spaces listed above. The collected space information of different performance venues can be stored as digital signals. Established as a database as artificial intelligence (AI) data storage information.

In application, the above-mentioned automatic detection is processed by a digital signal processor (DSP) and applied to the developed product. It has an automatic sound field detection and analysis function, and we can use this automatic detection function to analyze the currently detected venue in real time. After the venue information has been obtained, automatic adjustments can be made to the sound field, which we call the off-site (off-site) playback technology: First, please refer to Figure 1, which shows an embodiment of the off-site playback technology. The concept is as follows The sound signal playback device or product with automatic detection technology developed by the present invention can restore the sound field of space A to space B or restore the sound field of space B to space A, depending on which sound The field is determined by personal preference. For example, restore the sound field of a concert hall to the living room at home, or restore the sound field of a home theater to the internal space of a self-driving car. In a preferred embodiment, the sound field restoration technology can also use the AI data analysis function. Referring to Figure 2, the original sound field conditions stored elsewhere (for example, concert halls, outdoor concert venues, national theaters, etc.) , Such as the loudness (Loudness), sound pressure level and frequency (Level and Frequency), spatial impulse response, reflected energy direction, critical distance, time reverberation (Reverberation Time), sound energy ratio, echo (Echo), early Decay Time (Early Decay Time, EDT), D50 (the ratio of early sound energy to total sound energy reached within 50ms), TS (gravity time of impulse response squared), C80 (sound field clarity), ITDG (initial delay gap) )... and other parameters are restored to the current space (for example, home theater at home, in a self-driving car, etc.).

For how to increase the sound field range of the sound field and the control of its direction, refer to Figure 3, where Figure 3(a) shows that when there is only a single sound source, sound waves do not interfere in space. When there are two or more sound sources (such as speakers), as shown in Figure 3(b)-(c), these The sound waves generated by the sound sources will interfere with each other in space due to the distance and frequency between them (Figure 3(b) shows that there are 6 low-frequency sound sources; Figure 3(c) shows that there are 6 high-frequency sound sources), In turn, sound columns (such as petal-shaped sound columns in Figure 3(b)-(c)) and sound field directivity are produced. Therefore, the use of multiple or multiple sets of audio units (including high and low frequencies) or speaker array (combination), such as the speaker array combination shown in Figure 4 (a)-(c), can increase the sound field Control of the sound field range and its direction (Figure 4(d)-(e)). Because the voice coil of the speaker has a low range of displacement and distortion when the sound pressure is high, the structure is different from most smart speakers today. In addition to the "array" arrangement in the bass part, the present invention designs Rely on "structural shape conditions" to enhance bass and diffusion performance.

As for how to realize the technology of automatically adjusting the best listening range, regardless of the sound field environment conditions, this design can form a sound field with multiple speakers to establish a complete sound localization, and can automatically adjust and process the environmental sound field to simulate the creation of the original sound The auditory experience of the field allows the audience to have a near-optimal listening effect in different environments. Based on the analysis of the above-mentioned 3D spatial sound technologies, the present invention proposes a system architecture 100 for generating a three-dimensional sound field. As shown in FIG. 5, the system architecture includes a spatial/ambient sound wave input unit 101 and binaural signal processing. The unit 102, the digital operation analysis unit 103, the three-dimensional signal calculation and comparison unit 104, and the live sound source recording calculation and comparison unit 105, wherein the space/ambient sound wave input unit 101 includes an array microphone 101a for recording or receiving space and environment The sonic wave 10 is converted and separated into digital form, and the format is processed by the digital audio signal processor (DAFX) 103a in the digital arithmetic analysis unit 103 for 3D calculation and analysis, and the analyzed signals are respectively fed to the binaural signal processing unit 102 and a digital signal processor (DSP) 103b in the digital arithmetic analysis unit 103. The source of the signal fed into the binaural signal processing unit 102 is to pass through the WXYZ 101b processing technology of the sound waves 10 in the received or received space and the environment, and then separate and convert them into a signal (B-format signal) similar to the perception of human binaural ears. , Processed by the decoder (Decoder) 101c into two loops (L+R) channel signals, and then the signal (X(n)) is transmitted to another processing organization through the interface (ALL PASS1, 2). This organization’s The processing is to include the processed signal, and then according to the interaural level difference (IDT), interaural time difference (ILD), head related transform function (HRTF) Theoretical and technical processing. This processing is aimed at the analysis and processing of human hearing recognition and positioning of the sound of space and environment, mainly using the sound pressure difference, energy intensity, frequency domain (spectrum), and time perception recognition analysis of human ears . This part of the 3D landscape sound field is an important part of restoring the sound field or establishing a 3D sound system, based on the interaural level difference (IDT) and interaural time difference (ILD) , Head related transform function (HRTF) and other binaural signal processing technology, compare and separate the digital form of acoustic signals (X(n), cos(ω _m n)), and separate the complex space The mixed sound is converted into the left and right channel sound signals (y _L (n), y _R (n)). The digital signal processor (DSP) 103b pairs the received signal, including the binaural signal processing unit 102 and the DAFX The signal input by 103a will be calculated, distributed, processed, converted by ADC (Analog-Digital conversion), DAC (Digital-Analog conversion) in time, and then input by the digital signal processor (DSP) 103b by the three-dimensional signal calculation and comparison unit 104 The signal uses the 3D processor 105b to perform signal and calculation optimization signal comparison and automatic adjustment, and then use the distributor 106 to distribute the compared processing signal to the 3D array speaker 107 for playback or output to other Use the destination device (for example, output to 3D headphones 109, e-sports system 111, 3D personal consumer products 113, 3D home theater 115, or live performance 117). The live audio source recording calculation and comparison unit 105 converts live performance, spatial audio or The signal is recorded by the live three-dimensional recording device 105a, and through the 3D location The processor (3D processor) 105b compares the recorded signal with the signal of the algorithm optimization signal and makes automatic adjustments, and then distributes the compared processing signal to the playback system (3D array speaker) 107 for playback or output To other use purpose devices.

In summary, the three-dimensional sound field generation system developed by the present invention has the following characteristics:

a). Sound field self-adjustment, automatic detection and real-time digital calculation, after the calculation is completed, automatically provide and provide information to the user to optimize the adjustment data and instructions, such as: (1) the distance between the speaker and the speaker , "Xyz" axis spacing, speaker and speaker layout range in space and other optimization parameters; (2) automatic adjustment of sound quality, including the adjustment of "EQ, Delay, Phase"; (3) automatic adjustment of volume , Automatically adjust the volume according to the automatic detection of the distance between the speaker and the speaker and the listener; (4) The adjustment of the sound field condition parameters, for several concert halls, theaters, etc., with good sound effects at home and abroad. , The working group digitizes its sound field condition parameters and provides users as an effect adjustment to make the sound field close to the sound field perception of their concert halls and theaters.

b). Speaker (speaker box) structure for personal use: including (1) high, medium, and woofer units are arrayed; (2) The loudspeaker and the loudspeaker can be combined and used separately; (3) There can be a woofer on the main unit as a lower frequency effect; (4) The separate loudspeakers include parts for power amplification, which are active speakers; (5) ) The structure of the main unit and separate speakers is designed to enhance the diversion function, and the sound can flow smoothly and the mid-bass enhancement function through this structure.

c). Speaker (speaker) function: including (1) the speaker and speaker signal are distributed by wireless or Bluetooth; (2) the distributed signal can be resolved into L+R+SUB, L+R+C+SUB and immersive (Immersive) function; (3) After the signal is processed, it can be distributed to each speaker, up to 100 speakers; (4) For speakers with more than 2 or more speakers, another function is pointing Sexual control can direct the sound to the desired direction according to the environment, user location, etc.

Based on the above technical features of the present invention, a personal audio playback device can be developed. In addition to the power, effect, and micro-volume design, it also measures the sound field adjustment function. Consumers place the micro-speaker according to their preferences. Within the conditional range (listening range), the micro-speaker will have the best reference effect and add sound field factors. , It can automate the calculation of sound field evaluation, so that the listener can place it at will and get a high-quality sense of sound. In the past, audio equipment playback will vary depending on environmental factors. For example, if a set of audio equipment is set up in a fixed environment, users may try to use related equipment to adjust their personal listening experience and sound field. Move its equipment to other rooms and spaces, and the perception will definitely change. This is because the sound conditions in the space change and the effect of the sound reaching the human ears also changes. The design purpose of personal audio playback equipment (micro speakers) is to make home theater-quality miniature products that consumers can carry around like earphones, so that they have remote (ex situ) playback performance. Therefore, the development direction of the product focuses on the research of spatial factors and micro-speaker sound field adjustment, using DSP to quickly calculate and adjust in time, to achieve sound pressure compensation, sound quality (EQ) adjustment compensation, time processing of related spacing, etc., to obtain close to home theater quality Feeling degree.

In view of the different hearing experience in different environments, we have added a sound field adjustment function that automatically adjusts the optimal listening range to personal audio playback equipment (micro speakers), so that different environments can be close to optimal Listen to the effect. In addition, the use of Wi-Fi, Bluetooth and expansion combination technology can also separate the host and speakers. Consumers can also selectively process the signal separately and multi-track to expand the audio. In the sound field adjustment of the host and speakers, consumption The user can also use the automatic sound field adjustment function, which may automatically adjust the sound changes due to different positions. The number of expansions can be from 1 to 100 speakers.

With the rapid development of DSP (digital signal processor) calculation technology, related products are more convenient to use. Spatial adjustment, reverberation, overall sound image, sound quality equalization processing, etc., can all increase the performance of optimization.

The sound field adjustment function of "automatically adjust and optimize the listening range" is designed exclusively for the unique function of this personal audio playback device (micro audio) product, so that in different environments, you can have near-optimal listening efficiency. In addition, due to various environmental factors, the sound may change due to different positions. The auditory perception is different. The sound texture is emphasized. The automatic adjustment function will assist the optimization. It also adds a Transfer Function to lock the sound direction and participate in it In addition to adjusting the sound quality, the sound field adjustment function also has the characteristic of beam control direction (Beam).

Through the detailed description of the above specific embodiments, it is hoped that the characteristics and spirit of the present invention can be described more clearly, and the scope of the present invention is not limited by the preferred specific embodiments disclosed above. On the contrary, its purpose is to cover various changes and equivalent arrangements within the scope of the patent for which the present invention is intended. Therefore, the scope of the patent application for the present invention should be interpreted in the broadest way based on the above description, so that it covers all possible changes and equivalent arrangements.

100: System architecture for generating three-dimensional sound field

10: Sound waves

101: Space/Ambient Sound Wave Input Unit

101a: Array microphone

101b:WXYZ

101c: Decoder

102: Binaural signal processing unit

103: Digital Operation Analysis Unit

103a: Digital Audio Signal Processor (DAFX)

103b: Digital Signal Processor (DSP)

104: 3D signal calculation and comparison unit

105: On-site audio source recording calculation and comparison unit

105a: On-site 3D recording device

105b: 3D processor (3D processor)

106: Distributor

107: Playback system (3D array speaker)

109: 3D headset

111: E-sports system

113: 3D personal consumer products

115: 3D Home Theater

117: Live Performance

Claims (11)

A three-dimensional sound field generation system, including: A space/ambient sound wave input unit for receiving sound waves in space and environment and converting them into digital format signals; A binaural signal processing unit, coupled to the spatial/ambient sound wave input unit, to receive the converted and separated digital signal and compare and separate the signal again according to the binaural signal processing technology; A digital arithmetic analysis unit includes a digital audio signal processor and a digital signal processor, coupled to the spatial/ambient sound wave input unit and the binaural signal processing unit, wherein the digital audio signal processor is used to receive the converted and separated The digital signal is subjected to three-dimensional calculation and analysis, and is fed into the binaural signal processing unit and the digital signal processor, wherein the digital signal processor is used to receive the binaural signal processing unit and the digital audio signal processor The input signal undergoes real-time calculation, distribution, processing, digital-to-analog conversion, and analog-to-digital conversion; and A three-dimensional signal calculation and comparison unit, coupled to the digital operation analysis unit for performing calculation optimization, signal comparison and automatic adjustment of the signal output by the digital operation analysis unit, and then compare the processed signal after the comparison Assigned to a sound signal playback system to generate a reconstructed sound field. For example, the three-dimensional sound field generation system described in the first item of the scope of patent application, which further includes a live audio source recording calculation and comparison unit for recording the audio source or signal of the live performance through a live three-dimensional recording device, and the recorded signal Compare with the signal of the above-mentioned algorithm optimization signal and perform automatic adjustment, and then distribute the compared processing signal to the above-mentioned sound signal playback system to generate a reconstructed sound field. The three-dimensional sound field generation system described in item 1 of the scope of patent application, wherein the above-mentioned binaural signal processing unit Based on binaural level difference (IDT), binaural time difference (ILD), head related transform function (HRTF) and other binaural signal processing technologies, the input The digital signal is compared and separated again to convert the complicated spatial mixing into the left and right channels of sound signals. The three-dimensional sound field generation system described in the first item of the scope of patent application, wherein the above-mentioned sound signal playback system includes a three-dimensional speaker array. A three-dimensional sound field generation system, including: A space/ambient sound wave input unit for receiving sound waves in space and environment and converting them into digital format signals; A binaural signal processing unit, coupled to the spatial/ambient sound wave input unit, and perform binaural signal processing on the converted and separated digital format signal; A digital arithmetic analysis unit coupled to the spatial/ambient sound wave input unit and the binaural signal processing unit to perform three-dimensional calculations and digital/analog conversion; and A three-dimensional signal calculation and comparison unit is coupled with the digital operation analysis unit to perform optimized signal comparison, and then is distributed to a sound signal playback system to generate a reconstructed sound field. For example, the 3D sound field generation system described in item 5 of the scope of patent application further includes a live sound source recording calculation and comparison unit, which is used to record, compare and adjust the sound source or signal of the live performance through a live 3D recording device . As described in item 5 of the scope of patent application, the three-dimensional sound field generation system, wherein the binaural signal processing unit is based on the binaural level difference (IDT) and binaural time difference (interaural level difference). Time difference (ILD), head related transform function (HRTF) processing. The three-dimensional sound field generating system described in item 5 of the scope of patent application, wherein the above-mentioned sound signal playback system includes a three-dimensional speaker array. A method for generating a three-dimensional sound field, including: Receive sound waves in space and environment through the sound wave input unit and convert them into digital signals; Binaural signal processing is performed on the digital signal with a binaural signal processing unit; Perform three-dimensional calculations with digital operation analysis unit; and Using the three-dimensional signal calculation and comparison unit, the digital signal is optimized for signal comparison, and then distributed to a sound signal playback system to generate a reconstructed sound field. For example, the 3D sound field generation method described in item 9 of the scope of patent application further includes a live sound source recording calculation and comparison unit, which is used to record, compare and adjust the sound source or signal of the live performance through a live 3D recording device . The three-dimensional sound field generation method described in item 9 of the scope of patent application, wherein the above-mentioned binaural signal processing includes binaural level difference (IDT), binaural time difference (ILD), head related Transfer function (head related transform function, HRTF) processing.

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