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CN-122018393-A - In-vehicle zone play control method, electronic device and storage medium

CN122018393ACN 122018393 ACN122018393 ACN 122018393ACN-122018393-A

Abstract

The invention discloses an in-vehicle regional play control method, electronic equipment and a storage medium. The in-vehicle regional play control method comprises the following steps of S110, obtaining time domain impulse responses of a loudspeaker to control points at a reference temperature, S120, obtaining optimal time domain control filter coefficient vectors according to the time domain impulse responses, S130, obtaining current temperature in real time operation, defining a compensation matrix according to the change relation of sound velocity and temperature based on the current temperature and the reference temperature, and S140, updating the optimal time domain control filter coefficient vectors by using the compensation matrix to obtain updated current time domain control filter coefficient vectors so as to adjust filter coefficients of the loudspeaker in each region and play sound in an open region. The in-vehicle zone play control method can effectively inhibit the influence of temperature fluctuation on the sound field zone performance, and avoid the sound field zone performance damage caused by the environmental temperature fluctuation.

Inventors

  • CAI YEFENG
  • YE CHAO
  • MA DENGYONG
  • MU YONGSHENG

Assignees

  • 苏州上声电子股份有限公司

Dates

Publication Date
20260512
Application Date
20260113

Claims (10)

  1. 1. A car interior zone play control method, the compartment space of the car is divided into a plurality of areas, one area is selected as the bright area, other areas are dark areas, there are loudspeakers in each said area separately and have a plurality of control points near corresponding human ears; The in-vehicle regional play control method is characterized by comprising the following steps of: s110, acquiring time domain impulse responses from the loudspeaker to each control point at a reference temperature; S120, obtaining an optimal time domain control filter coefficient vector according to the time domain impulse response; s130, when the system runs in real time, obtaining the current temperature, and defining a compensation matrix based on the current temperature and the reference temperature according to the change relation of sound velocity and temperature; And S140, updating the optimal time domain control filter coefficient vector by using the compensation matrix to obtain an updated current time domain control filter coefficient vector so as to adjust filter coefficients of speakers in each region and play sound in an open region.
  2. 2. The in-vehicle compartment playback control method according to claim 1, characterized in that in step S130, the compensation matrix P is defined as follows: ; Wherein, the C 0 is the reference temperature, and C m is the current temperature; Definition of the definition Where i=0, 1..n-1, N is the length of the time domain control filter response coefficients of the speaker; , wherein, 。
  3. 3. The in-vehicle compartment playback control method of claim 1, wherein the compensation matrix has a size of nxn, where N is a length of a time-domain control filter response coefficient of the speaker.
  4. 4. A vehicle interior space playback control method as set forth in any one of claims 1 to 3, characterized in that in step S140, the current time domain control filter coefficient vector is updated in accordance with the following expression : ; Wherein, P is a compensation matrix, And controlling a filter coefficient vector for the optimal time domain.
  5. 5. The in-vehicle compartment playback control method according to any one of claims 1 to 3, characterized in that in step S110, the optimal time-domain control filter coefficient vector is obtained by measurement or simulation; In step S130, the current temperature is obtained in real time through a vehicle-mounted temperature sensor, and in step S140, the current time domain control filter coefficient vector is updated in real time according to the current temperature.
  6. 6. The in-vehicle compartment playback control method according to any one of claims 1 to 3, characterized in that in step S120, the optimal time-domain control filter coefficient vector is obtained using an ACC or LS optimization frequency domain algorithm.
  7. 7. A method of controlling in-vehicle zone playback according to any one of claims 1 to 3, wherein each zone has L speakers, each zone has a plurality of control points, and time domain impulse responses of all speakers to all control points are acquired in step S110; Time domain control filter coefficient vector Wherein As a vector element of the vector, Is a time discrete subscript; Is the speaker channel, and T represents the transpose.
  8. 8. The in-vehicle zone play control method according to any one of claims 1 to 3, wherein a plurality of zones are divided according to seat positions in a vehicle cabin, the total number of the zones is 4 or more, and the number of the dark zones is 3 or more.
  9. 9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the in-vehicle zone play control method according to any one of claims 1 to 8 when executing the program.
  10. 10. A computer-readable storage medium, wherein the computer-readable storage medium has stored thereon a computer program which, when executed by a processor, implements the in-vehicle zone play control method according to any one of claims 1 to 8.

Description

In-vehicle zone play control method, electronic device and storage medium Technical Field The invention belongs to the technical field of intelligent cabins of vehicles, and particularly relates to an in-vehicle regional play control method, electronic equipment and a storage medium. Background Along with the acceleration of the intelligent process of the new energy automobile, the intelligent cabin technology supporting multi-region independent audio output has become a core competitiveness for improving user experience. The zoned playing system can provide customized audio content for passengers in different seat areas through an accurate sound field control technology, meanwhile, the sound fields in all the areas are ensured not to interfere with each other, and the pain point that the traditional vehicle-mounted sound system cannot meet personalized requirements is effectively solved. The partitioning algorithms of the current mainstream are all realized based on a transfer function matrix from a loudspeaker to a control point, and the measurement accuracy of the matrix directly influences the partitioning performance of a sound field. One of the great challenges faced by the existing research is that when the sound velocity fluctuation caused by the environmental temperature changes causes the dynamic drift of the transfer function, the transfer function matrix after the change is not matched with the transfer function matrix used for calculating the weight coefficient, so that the partition performance of the sound field is reduced, and no effective temperature compensation mechanism is established in the existing algorithm at present. Aiming at the problems, various researches are carried out in academia, namely, stability is solved by introducing a regularization constraint optimization matrix, an error probability model is constructed to quantitatively measure uncertainty, and although the method improves the anti-interference capability of an algorithm, the influence of temperature factors on acoustic characteristics is not considered specifically. Researches show that sound velocity and temperature are in positive correlation, and when the ambient temperature fluctuates, the sound velocity changes can directly cause the phase and amplitude distortion of the transfer function matrix, so that the partition performance of the sound field is damaged. The above information disclosed in the background section is only for enhancement of understanding of the background of the application and therefore it may contain information that does not form the prior art that is already known to a person of ordinary skill in the art. Disclosure of Invention The invention provides an in-vehicle regional play control method, electronic equipment and a storage medium, which can effectively inhibit the influence of temperature fluctuation on sound field partitioning performance and avoid the damage of the sound field partitioning performance caused by environmental temperature fluctuation. The first aspect of the present invention provides an in-vehicle zone play control method, wherein a cabin space of a vehicle is divided into a plurality of zones, one zone is selected as a bright zone, the other zone is a dark zone, and each zone is provided with a speaker and a plurality of control points corresponding to the vicinity of a human ear; The in-vehicle regional play control method comprises the following steps: s110, acquiring time domain impulse responses from the loudspeaker to each control point at a reference temperature; S120, obtaining an optimal time domain control filter coefficient vector according to the time domain impulse response; s130, when the system runs in real time, obtaining the current temperature, and defining a compensation matrix based on the current temperature and the reference temperature according to the change relation of sound velocity and temperature; And S140, updating the optimal time domain control filter coefficient vector by using the compensation matrix to obtain an updated current time domain control filter coefficient vector so as to adjust filter coefficients of speakers in each region and play sound in an open region. In a preferred embodiment, in step S130, the compensation matrix P is defined as follows: Wherein, the C 0 is the reference temperature, and C m is the current temperature; Definition of the definition Where i=0, 1..n-1, N is the length of the time domain control filter response coefficients of the speaker; , wherein, 。 In a preferred embodiment, the size of the compensation matrix is n×n, where N is the length of the time domain control filter response coefficient of the speaker. In a preferred embodiment, in step S140, the current time domain control filter coefficient vector is updated according to the following formula: Wherein, P is a compensation matrix,And controlling a filter coefficient vector for the optimal time domain. In a preferred embodiment, in step