Coordinate definition method of sound field space

Abstract

The invention discloses a coordinate definition method of a sound field space. A position with the same altitude as an ear of a mixer being carrying out monitoring at the center of a horizontal tangent plane of the sound field space is defined as an original point of a coordinate; an number axis that passes through the original point of the coordinate and is perpendicular to the horizontal tangent plane is defined as a Z axis, wherein the forward direction of the Z axis is arranged upwardly; two number axes that are perpendicular to each other and pass through the original point of the coordinate on the horizontal tangent plane are defined as an X axis and a Y axis respectively; a position coordinate of a sound object in the sound field space is defined as (x, y, z); an action region of the sound object is defined as (phi, theta, gamma), wherein the phi expresses an included angle between a projection of a connecting line between the sound object and the original line on an xoy plane and the x axis and the range is [0,2pi), the theta expresses an included angle between the connecting line between the sound object and the original line and the z axis, and the gamma is defined as an included angle between a conical surface generatrix and a central axis and describes the opening size of the conical surface and the range is [0, pi / 2]. With the provided method, the high-efficiency space expression and good sound field effect are realized.

Description

technical field [0001] The invention relates to the technical field of sound coding, in particular to a method for defining coordinates of a sound field space. Background technique [0002] With the rapid development of computing power and networks, audio recording, downmix editing, encoding, decoding, rendering and playback technologies that can represent real three-dimensional sound fields in film, television, music, games, virtual reality and network video applications, It has important application value. "Atmospheric sound" is a vivid description of the three-dimensional sound field. [0003] At present, MPEG has launched the three-dimensional sound coding technology of MPEG H, and Dolby has introduced the Atmos panoramic sound coding technology, both of which put forward the concept of sound object coding on the basis of traditional multi-channel signal coding. Among them, Dolby Atmos adopts the method of directly recording the three-dimensional movement trajectory of...

AI Technical Summary

Problems solved by technology

In this way, the positioning of the sound object is inflexible, and there are fewer options, so that the sound performance is not flexible enough.

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