Enabling 3d sound reproduction using a 2d speaker arrangement
AssigneeSTMicroelectronics Asia Pacific Pte Ltd
InventorsAnnamalai Swaminathan, Sapna George
Life of this patent
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Abstract
The perception of 3D sound positioning can be achieved using a 2D arrangement of speakers positioned around the listener. The disclosed techniques can enable listeners to perceive sounds as coming from above and/or below them, without the need for positioning speakers above and/or below the listener. In some embodiments, elevation information can be included in the X and Y horizontal components of the 2D ambisonics encoding. The X and Y components can be decoded using 2D ambisonics decoding. Suitable filtering may be performed on the decoded sound information to enhance the listener's perception of the elevation information encoded in the X and Y components.
Claims25
A method of processing sound information representing a position of a sound relative to an x-axis, a y-axis perpendicular to the x-axis, and a z-axis perpendicular to the x-axis and the y-axis, the method comprising:
- receiving X encoding information representing a position component of the sound along the x-axis, wherein the X encoding information includes information related to a position of the sound along the z-axis;
- receiving Y encoding information representing a position component of the sound along the y-axis, wherein the Y encoding information includes information related to a position of the sound along the z-axis;
- performing first filtering of the sound information when the position of the sound is above a first position along the z-axis;
- and
- performing second filtering of the sound information when the position of the sound is below the first position along the z-axis.
A system for processing sound information representing a position of a sound relative to an x-axis, a y-axis perpendicular to the x-axis, and a z-axis perpendicular to the x-axis and the y-axis, wherein the system is configured to:
- receive X encoding information representing a position component of the sound along the x-axis, wherein the X encoding information includes information related to a position of the sound along the z-axis;
- receive Y encoding information representing a position component of the sound along the y-axis, wherein the Y encoding information includes information related to a position of the sound along the z-axis;
- perform first filtering of the sound information when the position of the sound is above a first position along the z-axis;
- and
- perform second filtering of the sound information when the position of the sound is below the first position along the z-axis.
A method of processing sound information representing a position of a sound, the method comprising:
- receiving ambisonics X and Y components comprising elevation information;
- and
- decoding the ambisonics X and Y components into signals suitable for reproducing 3D sound using a 2D arrangement of speakers.
Dependencies are inferred from the claim text.