Method and system for enhancing effect of multichannel system

A multi-channel, sound source technology, applied in the field of acoustics, can solve the problems of fewer speakers, large errors, troublesome speaker placement, etc.

Active Publication Date: 2015-12-02
WUHAN UNIV
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AI Technical Summary

Problems solved by technology

The higher the order, the better the effect of reconstructing the sound field, but more speakers are needed, which will make speaker placement more troublesome, which is not conducive to practical use
For example, when 8 speakers are arranged in a regular hexah

Method used

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  • Method and system for enhancing effect of multichannel system
  • Method and system for enhancing effect of multichannel system
  • Method and system for enhancing effect of multichannel system

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Embodiment Construction

[0090] Aiming at multi-channel systems placed on the same spherical surface, the present invention proposes a multi-channel system effect enhancement method. The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0091]Embodiment The process of enhancing the reconstruction effect of the regular hexahedron reconstruction system composed of 8 speakers Spo1, Spo2, ..., Spo8, see figure 1 , with the following steps:

[0092] Step 1. Suppose P speakers Spo1, Spo2, ..., SpoP are placed on the same spherical surface in a positive Q-hedron structure, the original sound source is a plane wave, and the original sound source signal is denoted as S O , the incident direction of the original sound source is , Indicates the angle between the incident direction of the plane wave and the Z axis, θ 0 Indicates the angle between the projection of the incident direction of the plane wave on ...

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Abstract

The invention discloses a method and a system for enhancing an effect of a multichannel system. The method comprises the following steps of obtaining coordinates of speakers at vertexes of a regular polyhedron when a speaker array is put in a regular polyhedron structure manner, constructing new speaker putting points, obtaining position information of the new speaker putting points and computing initial allocation signals of all speakers; allocating speaker signals at the new speaker putting points to the speakers at the vertexes of the regular polyhedron; and obtaining a final allocation signal of each speaker at the vertex of the regular polyhedron through a summation method and deleting the speakers at the new speaker putting points. According to the technical scheme of the invention, the decomposition components of spatial information can be increased, the physical properties of the sound at the original point, the left ear and the right ear are more fully kept, and the method and the system are beneficial to enhancement of a reconstruction effect of the multichannel system.

Description

technical field [0001] The invention belongs to the field of acoustics, in particular to a multi-channel system effect enhancement method and system. Background technique [0002] With the development of 3D TV and 3D movie technology, 3D audio technology has become a research hotspot in the field of multimedia. In three-dimensional audio technology, Ambisonics (high-fidelity stereophonic reproduction) is an important physical sound field reconstruction technology. In the 1870s, Michael Gerzon of Oxford University first proposed the Ambisonics technology, which uses spherical harmonics to represent and reconstruct the sound field. Compared with other 3D sound field reconstruction methods such as Wave Field Synthesis (WFS), Vector Based Amplitude Panning (VBAP), and Head-Related Transfer Function (HRTF), Ambisonics technology is a more practical And gradually approaching the method of acoustic holography. [0003] In the ambisonics system, the sound field reconstruction eff...

Claims

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Application Information

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IPC IPC(8): H04S3/00
Inventor 胡瑞敏王松王晓晨方博伟杨乘武庭照张灵鲲柯善发杨玉红涂卫平
Owner WUHAN UNIV
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