A sound playback method and system based on wave field synthesis and wave field analysis

Abstract

The invention provides a sound reproduction method and a system based on wave field synthesis and wave field analysis. The method comprises steps of using wave field analysis to respectively record a first sound field of a recording room and a second sound field of a listening room, adopting a wave domain transformation formula to carry out spatial domain decomposition on the measured first sound filed and the second sound field to obtain signals after first wave domain decomposition and signals after second wave domain decomposition, transmitting signals after first wave domain decomposition to one reconstruction end of the sound field and adopting wave field synthesis to initially reconstruct the sound field recorded by the recording room, adopting single channel inverse filtering to remedy influences of listening room reflection signals on sound fields recorded by the initial recording room to obtain the sound field recorded in the recording room reconstructed finally. According to the system and the method, a broad listening area is provided and the area is not limited to certain multiple listening places, a multi-input multi-output system is decoupled into a plurality of single-input single-output systems via wave domain transformation, and computation complexity is thus reduced.

Description

technical field [0001] The invention relates to the field of sound field playback, in particular to methods for recording, playback and room compensation, in particular to a sound playback method and system based on wave field synthesis and wave field analysis. Background technique [0002] The main purpose of the multi-channel sound reproduction system is to give the audience an optimal auditory experience. Therefore, when designing these systems, the reproduced sound is required to be as realistic as possible, so that the audience does not know that the sound is reproduced by the speaker array. To achieve this goal, it is obviously not enough to only know the time domain information of the audio signal, and the spatial domain information is also particularly important. Furthermore, since the invention of stereophonic technology, it has been known that at least two speakers are required in order to reconstruct the spatial position of the sound image. However, the stereo te...

AI Technical Summary

Problems solved by technology

Due to the extremely high number of input / output channels, the computational complexity is so high that it becomes infeasible to directly implement these algorithms in WFS / WFA systems

Images