WO2020047932A1 - Système de reproduction sonore de cinéma numérique et son procédé de commande - Google Patents

Système de reproduction sonore de cinéma numérique et son procédé de commande Download PDF

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Publication number
WO2020047932A1
WO2020047932A1 PCT/CN2018/109217 CN2018109217W WO2020047932A1 WO 2020047932 A1 WO2020047932 A1 WO 2020047932A1 CN 2018109217 W CN2018109217 W CN 2018109217W WO 2020047932 A1 WO2020047932 A1 WO 2020047932A1
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sound
speaker array
surround
reproduction system
screen
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PCT/CN2018/109217
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English (en)
Chinese (zh)
Inventor
赵茜
郑建国
唐海生
熊齐军
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音王电声股份有限公司
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Publication of WO2020047932A1 publication Critical patent/WO2020047932A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
    • H04R1/403—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers loud-speakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/26—Spatial arrangements of separate transducers responsive to two or more frequency ranges

Definitions

  • the invention relates to a digital cinema sound reproduction system, in particular to a digital cinema sound reproduction system suitable for non-transparent material screens and a control method thereof.
  • the current digital cinema sound system is composed of: a horn-type main sound reinforcement speaker system, a subwoofer, surround speakers, a professional amplifier, a digital cinema processor, and a digital audio processor.
  • the matching video projection system is a professional digital high-resolution Projector and dedicated sound-transmitting curtain.
  • the major projector manufacturers are monopolized by foreign technology.
  • the resolution is generally 2K (2048x1080).
  • the development trend of projectors is that the resolution gradually increases from 2K to 4K (4096x2160).
  • the horn-type main sound reinforcement speaker system + subwoofer is generally placed behind a sound-transmitting curtain.
  • the materials used in the screens of traditional movie theaters are sound-transmitting materials.
  • the horn-type main sound reinforcement speaker system and ultra-low-frequency speakers are usually placed behind the sound-transmitting curtain.
  • the traditional main channel sound reinforcement system cannot be used.
  • the speaker array can solve the problem of sound reinforcement of the main channel, and it also has many features that are difficult to achieve with traditional main channel sound reinforcement systems. It is difficult to change the directivity of the traditional sound reinforcement system after installation.
  • the speaker's directivity can be adjusted through the software control platform without changing the position of the speaker, and a virtual sound source linked with the movie image can be generated, so that the sound image position in the entire viewing area is correct Cancellation of the best listening point, and at the same time, it can also make acoustic compensation for movie theaters with unsatisfactory projection environment. These are all unattainable with traditional ring sound systems.
  • the invention designs a digital cinema sound reproduction system and a control method thereof, which solve the following technical problems: (1) the problem of sound reinforcement of the main channel of a movie screen which is a non-transparent material. (2) Once the traditional speaker system is installed, the sound field distribution cannot be changed, and the sound field distribution in the audience area is uneven, and some audience areas have poor hearing.
  • the present invention adopts the following solutions:
  • a digital cinema sound reproduction system includes a sound reproduction system processor, a main channel DSP processor, a surround channel DSP processor, a software control platform, a power amplifier, a ring screen speaker array (2), and a subwoofer (3)
  • the surround speaker group (4, 5, 6) is characterized in that: the sound reproduction system processor analyzes the movie sound signal, so that the sound signal enters the main channel DSP processor and the surround channel DSP processor through different channels;
  • the software control platform controls the overall sound field environment, compensates the original movie theater sound field, and generates a variety of different virtual sound field environments.
  • the ring screen speaker array (2) is composed of a center upper speaker array, a center lower speaker array, a left speaker array, and a right speaker array, and the center upper speaker array is a speaker array above the screen; the center lower speaker The array is the speaker array below the screen; the left speaker array is the speaker array on the left side of the screen; the right speaker array is the speaker array on the right side of the screen.
  • These four groups of speaker arrays are composed of multiple speaker sub-arrays in a linear form Arrange around the screen.
  • the software control platform is jointly controlled by the main channel DSP processor and the surround sound DSP processor, and the original cinema sound field is compensated by the ring screen speaker array (2) to generate a variety of different virtual sound field environments;
  • the main channel DSP processor can control the sound field of the main channel, so that the sound signal of the main channel is distributed in different audience areas, and at the same time, the beam directivity of multiple sound fields is formed;
  • the sound field of the channel is controlled so that the sound signal of the surround channel passes through the processor to form a specific sense of space and surrounding.
  • the main channel DSP processor performs specific algorithm processing on the sound signal.
  • the processing algorithms include, but are not limited to, algorithms such as weighting, filtering, and delaying, which can form different directivity in the vertical and horizontal planes;
  • the main channel The DSP processor has multiple inputs and multiple outputs, and the number of output channels is the same as the number of units in the ring screen speaker array (2);
  • the sound signal of the center channel is processed and distributed into multiple channel sounds.
  • the signals are fed to the upper center speaker array and the lower center speaker array; the sound signals of the left and right channels are processed to be distributed into the sound signals of multiple channels and fed to the left speaker array and the right speaker array, respectively.
  • the surround channel DSP processor performs digital signal processing on the sound signal, and the processing algorithms include, but are not limited to, algorithms such as weighting, filtering, and delaying.
  • the algorithm is used to compensate the overall original sound field environment and simultaneously generate multiple Different types of virtual sound fields; the surround channel DSP processor has multiple inputs and multiple outputs, and the number of output channels is the same as the number of surround speakers.
  • the power amplifier is responsible for power amplifying the sound signals of all speakers in the sound reproduction system, and the total power of the power amplifier is the sum of the power required by all speakers plus a power margin of 3 dB.
  • each of the speaker sub-arrays (2) is composed of single-layer or multi-layer transducers with different arrangement shapes.
  • the transducer in the present invention refers to a device that can convert any other form of energy into sound energy, including, but not limited to, existing speakers.
  • the surround speaker group includes right surround speakers (4), left surround speakers (5), and surround back speakers (6), right surround speakers (4), left surround speakers (5), and surround back speakers (6). In front of the screen of the non-transmissive material.
  • non-transparent material screen is an LED screen (1) or an OLED screen and other non-transmissive material screens.
  • a control method for a digital cinema sound reproduction system includes the following steps: after passing the sound signals of the ring screen speaker array through a signal processing algorithm, using the principle of sound wave superposition, the sound waves emitted by a plurality of speaker sub-arrays (2) are formed by interference; Different directivity points to a specific audience area and changes the coverage angle of the speaker array to adapt to different movie projection environments.
  • a control method of a digital cinema sound reproduction system includes the following steps: an algorithm is used to change the sound signal of the loudspeaker sub-array (2) to make it equal to the sound field intensity produced by the original sound source at the position to form a virtual sound source and reproduce the original sound The temporal and spatial characteristics of the field.
  • the virtual sound source is realized at different depths and positions of the screen of the non-transparent material, or the virtual sound source is realized at different depths and positions outside the screen of the non-transparent material.
  • the ring screen speaker array is easy to better adapt to the LED screen, facilitates the installation of the device, and can be placed outdoors without being restricted by the venue.
  • the speaker array of the present invention can form an adjustable directivity, which increases the coverage angle of the sound field. Without changing the position of the device, only the software adjustment can make the sound field evenly distributed in different audience areas and adapt to different Movie screening environment, such as when the audience area is above and below or other clearly zoned environments.
  • the speaker array of the present invention can realize virtual sound sources at different depths and positions in the screen direction. Not limited by the best listening position, no matter where the audience is, the sound image position is always correct and will not change with the change of the audience position.
  • the position of the virtual sound source is not limited to the screen area, but is adjusted in time according to the movie content. When the LED screen is naked-eye 3D, it can achieve the effect of audio-visual integration and increase the audience's immersion in watching movies.
  • Fig. 1 Schematic diagram of the sound reproduction system of a digital cinema in the present invention.
  • FIG. 2 is a schematic plan view showing the location of the digital cinema sound reproduction system in the present invention.
  • FIG. 3 is a 3D schematic diagram of the position of the digital cinema sound reproduction system in the present invention.
  • FIG. 4 is a combined schematic diagram of a speaker sub-array in the present invention.
  • Figure 5 Schematic diagram of the ring screen speaker array installation in the present invention
  • FIG. 6 is a schematic diagram of a speaker sub-array in the present invention.
  • Figure 7 Schematic diagram of the first layer transducer group of the loudspeaker sub-array in the present invention.
  • Figure 8 Schematic diagram of the distribution of the second-layer transducer groups of the loudspeaker sub-array in the present invention
  • Figure 9 Schematic diagram of the third-layer transducer group distribution of the loudspeaker sub-array in the present invention.
  • FIG. 10 is a schematic side view of a multi-layer transducer group combination of a speaker sub-array in the present invention.
  • FIG. 11 is a schematic diagram of directivity of different frequency bands of a ring screen speaker array in the present invention.
  • FIG. 12 is a schematic diagram of directivity of different signals of a ring screen speaker array in the present invention.
  • FIG. 13 is a schematic diagram of a virtual moving sound source of a ring screen speaker array in the present invention.
  • a digital cinema sound reproduction system includes a ring screen speaker array 2, an ultra-low frequency speaker 3, surround speakers 4, 5, 6, a power amplifier, a digital cinema processor, a main channel DSP processor, and surround sound.
  • Channel DSP processor and software control platform The ring screen loudspeaker array 2 is composed of multiple loudspeaker sub-arrays 2, and the multiple loudspeaker sub-arrays 2 are tightly and uniformly distributed around the screen of the non-transparent material.
  • the sound reproduction system processor analyzes the sound signal of the movie, so that the sound signal enters the main channel DSP processor and the surround channel DSP processor through different channels.
  • the software control platform controls the overall sound field environment, compensates the original movie theater sound field, and generates a variety of different virtual sound field environments.
  • the software control platform is jointly controlled by the main channel DSP processor and the surround sound DSP processor to compensate the original movie theater sound field and generate a variety of different virtual sound field environments.
  • the main channel DSP processor can control the sound field of the main channel, so that the sound signals of the main channel are distributed in different audience areas, and beam directivity of multiple sound fields is formed at the same time.
  • the surround channel DSP processor Through the surround channel DSP processor, the sound field of the surround channel can be controlled, so that the sound signals of the surround channel pass through the processor to form a specific sense of space and surround.
  • the main channel DSP processor performs specific algorithm processing on the sound signals.
  • the processing algorithms include, but are not limited to, algorithms such as weighting, filtering, and delaying, and can form different directivity in the vertical and horizontal planes.
  • the main channel DSP processor has multiple inputs and multiple outputs, and the number of output channels is the same as the number of units in the ring screen speaker array.
  • the sound signal of the center channel is processed and distributed into sound signals of a plurality of channels, which are fed to the speaker array of the center speaker array 1 and the center speaker array 2.
  • the sound signals of the left and right channels are processed and distributed into sound signals of multiple channels, which are respectively fed to the left speaker array and the right speaker array.
  • the surround channel DSP processor mainly performs digital signal processing on sound signals. Processing algorithms include, but are not limited to, algorithms such as weighting, filtering, and delaying. These algorithms are used to compensate the overall original sound field environment and generate multiple different types of signals at the same time. Virtual sound field.
  • the surround channel DSP processor has multiple inputs and multiple outputs. The number of output channels is the same as the number of surround speakers.
  • the power amplifier is responsible for power amplification of the sound signals of all speakers in the voice-back system.
  • the total power of the power amplifier is the sum of the power required by all speakers plus a power margin of 3dB.
  • the surround speakers include right surround speakers 4, left surround speakers 5, and surround back speakers 6.
  • the right surround speakers 4, left surround speakers 5, and back surround speakers 6 are disposed in front of the screen of the non-transparent material.
  • the ring screen speaker array 2 shown in the figure is composed of a center speaker array 1 and a center speaker array 2, a left speaker array and a right speaker array, and the center speaker array 1 is a speaker array above the screen;
  • the speaker array 2 is the speaker array below the screen;
  • the left speaker array is the speaker array on the left side of the screen;
  • the right speaker array is the speaker array on the right side of the screen.
  • These four groups of speaker arrays are composed of multiple speaker sub-arrays, arranged in a linear fashion around the screen.
  • the sound image of the center channel in the main channel of a traditional movie theater audio system cannot be changed.
  • the sound energy ratio of the upper speaker array and the lower speaker array and the directivity of the array can be used to change the center sound.
  • the audiovisual position of the road For example, when the acoustic environment inside a movie theater is ideal, when the directivity of the upper speaker array and the lower speaker array are in the same area, when the acoustic energy ratio is 1: 1, the sound image position is in the middle area, and the upper speaker is added. Array, pan position can be moved up. Therefore, the sound image position can be moved to an ideal position by adjusting the sound energy ratio and directivity.
  • a ring screen speaker array includes a plurality of speaker sub-arrays 2, and the plurality of speaker sub-arrays 2 are closely and uniformly distributed around the screen of the non-transparent material.
  • the screen of non-transparent material is LED screen 1 or OLED screen.
  • Each loudspeaker sub-array 2 is composed of a plurality of transducers with different arrangement shapes.
  • Each loudspeaker sub-array 2 is composed of three layers of transducers with different arrangement shapes, and adopts a three-frequency sound signal processing method.
  • Each layer corresponds to a different frequency band of the sound signal.
  • the first transducer group 21 in the lower layer which Responsible for processing the low frequency band of the sound signal
  • the second transducer group 22 of the middle layer is responsible for processing the mid frequency band of the sound signal
  • the third transducer group 23 of the upper layer is responsible for processing the high frequency band of the sound signal.
  • the first transducer group 21 uses one transducer
  • the second transducer group 22 uses four transducers
  • the third transducer group 23 uses nine transducers arranged in a cross shape.
  • the first transducer group 21 adopts a transducer diameter d
  • the transducer diameter in the second transducer group 22 is d / 2
  • the third transducer group The diameter of the transducer in 23 is d / 5;
  • each speaker sub-array 2 is composed of a single-layer transducer, a full-frequency sound signal processing method is used, and the first transducer group 21 is responsible for the full frequency band of the sound signal;
  • each speaker sub-array 2 is composed of two layers of transducers
  • a two-frequency sound signal processing method is used.
  • the first transducer group 21 in the lower layer is responsible for the low frequency band of the sound signal
  • the second transducer group 23 in the upper layer is used.
  • the crossover point f1 between the low frequency band and the high frequency band should meet the following conditions:
  • each speaker sub-array 2 is composed of three-layer transducers, three layers of transducers with different arrangement shapes are used, and a three-frequency sound signal processing method is adopted, and each layer corresponds to a different frequency band of the sound signal;
  • the first transducer group 21 in the lower layer is responsible for processing the low frequency band of the sound signal;
  • the second transducer group 22 in the middle layer is responsible for processing the middle frequency band of the sound signal;
  • the third transducer group 23 in the upper layer is responsible for responsible for processing high-frequency bands of sound signals.
  • the crossover point f2 of the low frequency band and the middle frequency band should satisfy the following conditions:
  • the crossover point f3 of the middle frequency band and the high frequency band should meet the following conditions:
  • the phases of the transducers in the same transducer group are the same, and the sensitivity, size and rated power are the same.
  • the control method of the digital cinema sound reproduction system of the present invention works as follows: Based on the DSP processing technology, after the sound signals of the ring screen speaker array pass a weighting, delay, or filtering algorithm, using the principle of sound wave superposition, multiple speaker sub-arrays 2 After the emitted sound waves are superimposed, different directivity is formed in different frequency bands or different signals, and the coverage angle of the speaker array can be increased. The sound field in the audience area is evenly distributed, which is suitable for different movie projection environments. Through the adjustment of the algorithm, the directivity and sound field distribution of the multiple speaker sub-arrays 2 are adjusted.
  • the speaker array can form different directivity in different frequency bands. As shown in Figure 7, by controlling the high-frequency unit, the speaker array can form a specific directivity in the high frequency band. At this time, the array can be in four directions: up, down, left, and right. All achieve sub-band directivity.
  • the adjustment angle of low-band directivity is ⁇ 1
  • the adjustment angle of mid-band directivity is ⁇ 2
  • the adjustment angle of high-band directivity is ⁇ 3. It is responsible for the delay of each transducer in the first transducer group 21 in the low-frequency band.
  • the time unit is t 1
  • the delay unit of the transducer in the second transducer group 22 of the middle frequency band is t 2
  • the delay unit of the transducer in the third transducer group 22 of the high frequency band is t 3
  • v is the speed of sound:
  • the low frequency of the speaker array on the left side of the screen needs to be adjusted downward to ⁇ 1 , then from bottom to top, the delay of the first unit is 0, the delay of the second unit is t 1 , and the delay of the third unit The time bit is 2t 1 , and the delay of the Nth unit is (N-1) t 1 .
  • the speaker array can make different signals have different directivity, as shown in Figure 8, because the speaker array processes three frequency signals, different signals are first filtered into low frequency signals, intermediate frequency signals, and high frequency signals. After the above-mentioned delay algorithm is processed for different frequency bands of different signals, different signals are superimposed on the same frequency band, and then fed to each transducer unit in the speaker array. For example, the two signals are signal 1 and signal 2. After filtering the signals 1 and 2 respectively, the signals are divided into signal 1 low frequency band, signal 1 medium frequency band, signal 1 high frequency band, signal 2 low frequency band, and signal 2 Mid-band, signal 2 high-band, and then delay processing these six groups of signals according to the above-mentioned directivity adjustment algorithm.
  • Each signal forms as many channels as the total number of transducers, forming a total of twice the total number of transducers. Number of channels. Each two channels correspond to the same transducer. Finally, the two channels corresponding to the same transducer are superimposed and fed to the transducer.
  • the control method of the ring screen speaker array and the screen image according to the present invention works as follows: the sound signal of the speaker sub-array 2 is changed by an algorithm to make it equal to the sound field intensity generated by the original sound source at that position to form a virtual sound source and reproduce The temporal and spatial characteristics of the acoustic field.
  • the virtual sound source is realized at different depths and positions of the screen of the non-transparent material, or the virtual sound source is realized at different depths and positions outside the screen of the non-transparent material.
  • the signal is first filtered to obtain the three frequency band signals S 1 (w) as the low frequency band and S 2 (w) as In the middle frequency band, S 3 (w) is the high frequency band.
  • the driving signal of the first layer transducer is D 1 (a)
  • the driving signal of the second layer transducer is D 2 (a)
  • the driving signal of the third layer transducer is D 3 (a).
  • a represents different positions of the transducer.
  • the distance between the first layer transducer and the second layer transducer is L 1
  • the distance between the first layer transducer and the third layer transducer is L 2.
  • the virtual sound source is behind the speaker array and away from the speaker array.
  • the normal distance of the first layer transducer in the middle is y 1
  • the listener is in front of the speaker array
  • the normal distance of the first layer transducer in the speaker array from the listener is y 2
  • the virtual sound source distance is changed.
  • the straight line distance of the energy device is r 1
  • j represents the imaginary number
  • w is the angular frequency
  • e is the natural logarithm
  • v represents the speed of sound:
  • the speaker array can not only form a virtual sound source behind the array, but also a focused sound source in front of the array, so that the virtual sound source can achieve different depths.
  • the specific method is as follows: the virtual sound source is in front of the speaker array and the distance from the normal of the speaker array is y 3 , the listener is in front of the speaker array, the normal distance of the speaker array from the listener is y 4 , and the virtual sound source The straight line distance from the transducer is r 2 .
  • the speaker array can not only form a virtual sound source behind the array, but also a focused sound source in front of the array, so that the virtual sound source can achieve different depths.
  • the specific method is as follows: the driving signal of the first layer transducer is Q 1 (a), the driving signal of the second layer transducer is Q 2 (a), and the driving signal of the third layer transducer is Q 3 (a ). Where a represents different positions of the transducer.
  • the distance between the first layer transducer and the second layer transducer is L 1
  • the distance between the first layer transducer and the third layer transducer is L 2.
  • the virtual sound source is in front of the speaker array and away from the speaker array.
  • the normal distance of the first layer transducer in the middle is y 3
  • the listener is in front of the speaker array
  • the normal distance of the first layer transducer in the speaker array from the listener is y 4
  • the straight line distance from the virtual sound source to the transducer is r 2 .
  • v represents the speed of sound:
  • the position of the virtual sound source can be changed in real time, and a virtual moving sound source can be formed as shown in FIG. 13.
  • the virtual sound source 1 and the virtual sound source 2 move in real time at different positions of the screen, up, down, left and right, and back and forth.
  • the movement position of the virtual sound source should be consistent with the motion state in the movie image. Realistic cinematic feel.
  • the speaker array can not only realize a single virtual sound source, but also realize the reflected sound of the virtual sound source at the same time. It is only necessary to form virtual sound sources with the same signal as the virtual sound source at different positions. At this time, the signal amplitude is attenuated by ⁇ times.
  • the relationship between the drive signal J (a) of the transducer and the original virtual sound source is:
  • ⁇ (w) is a function related to the frequency and reflection coefficient of the reflected sound.
  • This method is not limited by the optimal listening position. No matter which position the audience is in, the sound image position is always correct and will not change with the change of the audience position. And combined with the movie screen content, increase the audience's sense of presence and immersion. At the same time, acoustic compensation can be made for movie theaters with poor acoustic environments, which are all effects that cannot be achieved when the original movie is played back.

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  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Stereophonic System (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)

Abstract

Système de reproduction sonore de cinéma numérique et son procédé de commande. Le système de reproduction sonore de cinéma numérique comprend un processeur de système de reproduction sonore, un processeur de signal numérique (DSP) de canal sonore principal, un DSP de canal sonore environnant, une plate-forme de commande logicielle, un amplificateur de puissance, un réseau de haut-parleurs entourant l'écran (2), un haut-parleur à fréquence ultra-basse (3) et des groupes de haut-parleurs environnants (4, 5, 6). Le système de reproduction sonore de cinéma numérique est caractérisé en ce que : le processeur de système de reproduction sonore analyse et traite un signal sonore de film, et la plate-forme de commande logicielle permet au signal sonore d'entrer dans le DSP de canal sonore principal et le DSP de canal sonore environnant au moyen de différents canaux sonores. La plate-forme de commande logicielle commande un environnement de champ sonore global de telle sorte que différentes bandes de fréquence ou différents signaux forment des directivités différentes; une source sonore virtuelle peut également être générée et un point de réception sonore optimal est supprimé; une pluralité de types de différents environnements de champ sonore virtuel sont générés de manière à s'adapter à des environnements différents de projection d'image de film.
PCT/CN2018/109217 2018-09-04 2018-09-30 Système de reproduction sonore de cinéma numérique et son procédé de commande WO2020047932A1 (fr)

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CN201811027562.XA CN109151660B (zh) 2018-09-04 2018-09-04 一种数字影院还音系统

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CN110493702B (zh) * 2019-08-13 2021-06-04 广州飞达音响股份有限公司 六面声影院还音系统
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CN111708509A (zh) * 2020-06-09 2020-09-25 上海幕革科技有限公司 一种提升音响系统播放效果的方法及系统
CN113329320B (zh) * 2021-05-27 2023-03-24 音王电声股份有限公司 一种基于对象的环屏扬声器阵列的声像合成方法及其应用
CN116347320B (zh) * 2022-09-07 2024-05-07 荣耀终端有限公司 音频播放方法及电子设备

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