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Dolby atmos sound coding method

An encoding method and panoramic technology, applied in the field of panoramic sound encoding, can solve the problems of lack of flexibility of sound objects, less choice, and inflexible sound performance, and achieve convenient sound production, good sound performance, and save code stream space. 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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  • Dolby atmos sound coding method

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Embodiment 1

[0028] 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).

[0029] 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:

[0030] (1, 1, 1)——Indicates the upper right corner in front of the area;

[0031] (-1, 1, 1)——indicates the upper left corner in front of the area;

...

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Abstract

The invention discloses a dolby atmos sound coding method. The method comprises: a sound object of sound field space is obtained; a three-dimensional coordinate system is established by using a position having the same altitude as a center of a horizontal tangent plane of the sound field space and a center of a two-ear connecting line of a mixer as an original point, and a three-dimensional coordinate value of the sound object is determined; the position track of the sound object uses a frame as a unit, each frame includes a plurality of blocks and a first block of each frame is a reference block and a subsequent block is a prediction block, and a position coordinate of an ith block of the sound object is determined to be (xi, yi, and zi); and three-dimensional coordinate values of the reference blocks are coded directly and differential coding is carried out on three-dimensional coordinate values of the prediction blocks. 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. 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 coding 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, encode...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L19/005G10L19/008G10L19/04
CPCG10L19/005G10L19/008G10L19/04
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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