Method for describing the composition of audio signals
AssigneeThomson Licensing
InventorsJens Spille, Jürgen Schmidt
Life of this patent
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Abstract
Method for describing the composition of audio signals, which are encoded as separate audio objects. The arrangement and the processing of the audio objects in a sound scene is described by nodes arranged hierarchically in a scene description. A node specified only for spatialization on a 2D screen using a 2D vector describes a 3D position of an audio object using said 2D vector and a 1D value describing the depth of said audio object. In a further embodiment a mapping of the coordinates is performed, which enables the movement of a graphical object in the screen plane to be mapped to a movement of an audio object in the depth perpendicular to said screen plane.
Claims8
A method using an audio processing apparatus for spatialization of a sound object, the sound object having associated a first parameter, 2D location information and depth information, wherein the first parameter defines whether or not the sound object is to be spatialized, the 2D location information comprises second and third parameters that define the 2D location of the sound object in terms of height and width respectively on a 2D plane, and the depth information comprises a fourth parameter, the method comprising steps of
- using an audio processing apparatus to determine from the first parameter that the sound object is to be spatialized;
- transforming the 2D location information and the depth information of the sound object to a 3D coordinate system, wherein said second parameter defining the height of the 2D location is mapped to audio depth information perpendicular to said 2D plane, said third parameter defining the width of the 2D location is mapped to the width information in the 3D coordinate system, and said fourth parameter is mapped to the height in the 3D coordinate system;
- and
- spatializing the sound according to the resulting 3D location information.
Dependencies are inferred from the claim text.