Three-dimensional audio signal generation method and system for non-spherical speaker array

Abstract

The invention provides a three-dimensional audio signal generation method and system for a non-spherical speaker array. The method comprises the steps of creatively, for most environments such as a home or theater, that is a non-spherical environment, arranging a speaker array, inputting location information of a speaker arranged in the available environment, location information of a virtual sound source in need of simulation and a sound source signal, and converting the locations into coordinates relative to an origin; conducting analysis and selection based on the converted speaker coordinate and the virtual sound source coordinate, selecting one to three speaks, mapping the speakers to a spherical face with a coordinate origin as the centre of sphere and the minimum distance from the selected speakers to the coordinate origin as the radius to form a virtual speaker, calculating the gain of the virtual speaker, and then based on the attenuation law of sound transmission, deriving an original actual speaker from the gain of the virtual speaker so as to achieve the purpose of virtual sound source reconstruction by using a sound signal after gain.

Description

technical field [0001] The invention relates to the technical field of acoustics, in particular to a three-dimensional audio signal generation method and system for aspheric speaker arrays. Background technique [0002] The development of 3D technology has profoundly changed people's viewing experience. The existing 3D video technology has been able to provide audiences with a better on-the-spot experience, and a large number of devices supporting 3D visual effects have appeared on the market; however, the existing 3D Audio technology lags behind. [0003] 3D audio refers to a virtual sound source reconstructed by an audio system that can move freely in three dimensions: horizontal, vertical, and distance. According to the above definitions, most of the mainstream stereo or surround sound technologies on the market today belong to 2D audio. Although these technologies can bring users a certain degree of audio surround feeling by rendering a large number of various backgroun...

AI Technical Summary

Problems solved by technology

[0002] The development of 3D technology has profoundly changed people's viewing experience. The existing 3D video technology has been able to provide audiences with a better on-the-spot experience, and a large number of devices supporting 3D visual effects have appeared on the market; however, the existing 3D Audio technology lags behind

[0007] However, the direction of the sound image formed by using the sine law and the tangent law can only be between two speakers, and it is not applicable when the plane where the speaker is located is not on the same plane as the user's head; VBAP technology is mostly based on spherical speaker array 3D audio Generation technology, the operation of the vector can only restore the direction of the sound source within a certain range, and the ability to restore the distance of the sound image is very weak

Because spherical speaker arrays are difficult to realize in real life, this technology makes 3D audio equipment expensive, which is not conducive to market promotion; the current 3D audio technology faces the problem of being difficult to market, which restricts the development of the multimedia industry

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