Dolby atmos processing method

A sound processing and panoramic technology, applied in the field of panoramic sound processing, can solve the problems of less choice, lack of elasticity of sound objects, and inflexible sound performance, and achieve high-efficiency spatial representation, perfect three-dimensional sound field, and convenient sound production. Effect

Active Publication Date: 2016-08-24
全景声(北京)智能科技有限公司
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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.

Method used

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Examples

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Embodiment 1

[0034] Embodiment 1: Taking a cube to describe the sound field space as an example, a typical application is that loudspeakers are arranged on the boundary surface of the cube. The spatial coordinate definition of the sound object: define the coordinate origin as the center of the horizontal section, the height is at the same level as the ear of the sound engineer when listening, and let the x-axis point to the right (wall), and the y-axis point to the front (usually the screen), The z-axis points vertically upwards (roof).

[0035] The sound field space is represented by normalized coordinates, the maximum absolute coordinate value of the x-axis, y-axis and z-axis is 1, the shorter side of the z-axis is the ground, and its normalized absolute coordinate value is a (a<1), Then the 8 coordinates of this sound field space are:

[0036] (1, 1, 1)——Indicates the upper right corner in front of the area;

[0037] (-1, 1, 1)——indicates the upper left corner in front of the area;

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Abstract

The invention discloses a dolby atmos processing method. The method comprises: a sound object of sound field space is obtained; a three-dimensional coordinate system is established by using a monitoring point as an original point and a three-dimensional coordinate value of the sound object is determined; the three-dimensional coordinate value of the sound object is divided into a reference block and a prediction block according to a time sequence; direct coding is carried out on the three-dimensional coordinate value of the reference block and differential coding is carried out on three-dimensional coordinate value of the prediction block; and according to the three-dimensional coordinate value before coding or after decoding, an effective acting area of the sound object is determined. According to the invention, coordination definition, moving track and acting area presentation methods during sound recording manufacturing, coding, decoding, and rendering playback processes are provided for the sound object in the three-dimensional sound field. The provided method has advantages of high coding efficiency, good sound performance, and convenient sound manufacturing.

Description

technical field [0001] The invention relates to the technical field of sound coding, in particular to a panoramic sound processing method. 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 the sound object, en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L19/008
CPCG10L19/008
Inventor 潘兴德吴超刚
Owner 全景声(北京)智能科技有限公司
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