CN-122018394-A - Partition control method, equipment, medium and product of sound field

CN122018394ACN 122018394 ACN122018394 ACN 122018394ACN-122018394-A

Abstract

The application provides a partition control method, equipment, medium and product of a sound field, which are applied to target equipment provided with a loudspeaker array, wherein the loudspeaker array is used for forming a sound field capable of being controlled in a partition in a specific physical space, any control point in a bright area region, a dark area region and a listening area in the bright area region in the sound field is determined as a target control point, constraint conditions are built according to a first target sound field corresponding to the target control point, an objective function of the sound field is solved, a control filter vector for driving the loudspeaker array is obtained, and driving signals for driving the loudspeaker array are generated according to the control filter vector, so that the sound field is controlled in a partition mode. The application can improve the partition control effect of the sound field.

Inventors

ZHU DONGHUI
MA FENG
GAO JIANQING
ZHU ZHIPENG

Assignees

科大讯飞(苏州)科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260122

Claims (10)

1. A zone control method of a sound field, applied to a target device configured with a speaker array for forming a zone controllable sound field in a specific physical space, the method comprising: Determining an open area region, a dark area region and a target control point in the open area region in the sound field, wherein the target control point is any control point in a listening area in the open area region; determining a first target sound field corresponding to the target control point, and constructing constraint conditions for carrying out partition control on the sound field according to the first target sound field; under the constraint condition, solving an objective function corresponding to the sound field to obtain a control filter vector for driving the loudspeaker array; And generating driving signals according to the control filter vector, and driving the loudspeaker array by using the driving signals so as to carry out partition control on the sound field.
2. The method of claim 1, wherein the determining the target control point in the bright field area comprises: acquiring the head position of a user in the open area; And determining any preset control point in the head position of the user as a target control point in the bright area.
3. The method of claim 1, wherein the particular physical space comprises a vehicle space, and wherein the determining the first target sound field corresponding to the target control point comprises: Determining a current scene type of the vehicle-mounted space, wherein the current scene type represents whether each seat of the vehicle-mounted space is occupied by a user or not, and the riding gesture of the user when the user is ridden; And determining a first target sound field corresponding to the target control point under the current scene type according to the current scene type and the mapping relation between the preset scene type and the target sound field corresponding to the control point.
4. The method of claim 1, wherein constructing constraints for zone control of the sound field from the first target sound field comprises: Determining a sound transfer function of the speaker array to the target control point; determining an actual sound pressure vector of the target control point according to the sound transfer function and the control filter vector; and constructing constraint conditions for carrying out partition control on the sound field based on the condition that the actual sound pressure vector of the target control point is equal to the first target sound field.
5. The method of any one of claims 1-4, wherein the constraint comprises an actual sound pressure vector of the target control point being equal to the first target sound field.
6. The method according to any of claims 1-4, wherein the objective function is used to solve for a control filter vector that minimizes a weighted sum of the reconstruction error of the bright field region and the acoustic energy of the dark field region, the objective function being constructed by: Determining a second target sound field corresponding to the open area region; determining an actual sound field of the open area according to the sound transfer function matrix of the open area and the control filter vector; constructing a reconstruction error of the open area region according to the difference between the actual sound field of the open area region and the second target sound field; Constructing sound energy of the dark area according to the sound transfer function matrix of the dark area and the control filter vector; and constructing and obtaining the objective function according to the reconstruction error of the bright area, the acoustic energy of the dark area and the weight parameters corresponding to the dark area.
7. The method of claim 6, wherein the particular physical space comprises a vehicle space, and wherein the determining the second target sound field corresponding to the open area region comprises: Determining a current scene type of the vehicle-mounted space, wherein the current scene type represents whether each seat of the vehicle-mounted space is occupied by a user or not, and the riding gesture of the user when the user is ridden; and determining a second target sound field corresponding to the bright region under the current scene type according to the current scene type and the mapping relation between the preset scene type and the target sound field corresponding to the bright region.
8. An electronic device comprising a memory and a processor; the memory is connected with the processor and used for storing programs; the processor is configured to implement the method according to any one of claims 1 to 7 by running a program in the memory.
9. A storage medium having stored thereon a computer program which, when executed by a processor, implements the method of any of claims 1 to 7.
10. A computer program product comprising computer program instructions which, when executed by a processor, cause the processor to implement the method of any one of claims 1 to 7.

Description

Partition control method, equipment, medium and product of sound field Technical Field The present application relates to the field of audio processing, and in particular, to a method, apparatus, medium, and product for controlling a sound field in a partition. Background Realizing high-quality sound field partition control in a specific acoustic space has become one of key technologies for improving the audiovisual experience of users. For example, the high-quality sound field partition control is realized in a vehicle (such as an intelligent automobile), so that the driving experience of a user can be improved. At present, the mainstream sound field partition control method generally takes the maximization of the sound energy ratio between the bright area and the dark area and the minimization of the sound field reconstruction error of the bright area as optimization targets, and introduces weight parameters to balance the two, so as to improve the acoustic isolation between the bright area and the dark area and reduce the tone quality distortion of the bright area. However, this method is highly dependent on manual adjustment of weight parameters, and requires a lot of time for repeated testing and tuning. In order to reduce the complexity of parameter adjustment, a scheme is provided for converting the reconstruction error of the bright field sound field into a strong constraint target, namely forcing the bright field sound field to be strictly equal to the target sound field, and taking the 'maximum sound energy ratio between the bright field and the dark field' as an optimization target. But this strategy would significantly compress the feasible solution space, resulting in poor acoustic isolation performance. In addition, when the target sound field changes along with the use scene, obvious audio splitting feeling can be generated, so that the control effect of sound field partition is poor. Disclosure of Invention Based on the state of the art, the application provides a method, equipment, medium and product for controlling the sound field partition, which can improve the control effect of the sound field partition. In order to achieve the technical purpose, the application specifically provides the following technical scheme: according to a first aspect of an embodiment of the present application, a partition control method of a sound field is provided, and the partition control method is applied to a target device configured with a speaker array, where the speaker array is used for forming a sound field capable of being controlled in a partition in a specific physical space, and the method includes determining an bright area region, a dark area region and a target control point in the bright area region in the sound field, where the target control point characterizes a key listening position in the bright area region, determining a first target sound field corresponding to the target control point, and constructing a constraint condition for performing partition control on the sound field according to the first target sound field, under the constraint condition, solving an objective function corresponding to the sound field to obtain a control filter vector for driving the speaker array, and driving the speaker array according to the control filter vector by using the driving signal to perform partition control on the sound field. In some implementations, the determining the target control point in the bright area includes acquiring a head position of a user in the bright area, and determining any one of the head positions of the user as the target control point in the bright area. In some implementations, the specific physical space includes a vehicle-mounted space, the determining a first target sound field corresponding to the target control point includes determining a current scene type of the vehicle-mounted space, wherein the current scene type represents whether each seat of the vehicle-mounted space takes a user or not and a taking gesture of the user when the seat takes the user, and determining the first target sound field corresponding to the target control point under the current scene type according to the current scene type and a mapping relation between a preset scene type and the target sound field corresponding to the control point. In some implementations, the constraint condition for carrying out partition control on the sound field according to the first target sound field construction comprises the steps of determining a sound transfer function from the loudspeaker array to the target control point, determining an actual sound pressure vector of the target control point according to the sound transfer function and the control filter vector, and constructing the constraint condition for carrying out partition control on the sound field based on the condition that the actual sound pressure vector of the target control point is equal to the first target sound field. In some imp