Apparatus and method for reproducing a spatially extended sound source or apparatus and method for generating a bitstream from a spatially extended sound source

A method for reproducing a spatially extended sound source comprising a defined position and geometry in a space, the method comprising:

• receiving a listener position;
• calculating data on a hull associated with the spatially extended sound source and projecting the data on the hull in a direction towards the listener position to obtain a projection of the hull as output data, or projecting information on a geometry of the spatially extended sound source towards the listener position and computing data on a hull of a result of the projecting to obtain output data;
• calculating positions of at least two sound sources for the spatially extended sound source using the output data;
• and
• rendering the at least two sound sources at the positions of the at least two sound sources to acquire a reproduction of the spatially extended sound source comprising two or more output signals, wherein the rendering comprises using different sound signals for the positions of the at least two sound sources, wherein the different sound signals are associated with the spatially extended sound source.

A non-transitory digital storage medium having stored thereon a bitstream representing a compressed description for a spatially extended sound source, comprising:

• at least two different sound signals for the spatially extended sound source;
• information on a geometry for the spatially extended sound source,
• first location information (321) for a first sound signal (301) of the at least two different sound signals (301, 302) indicating a first location of the first sound signal (301) with respect to the information on the geometry (331, 341) of the spatially extended sound source;
• and
• second location information (321) for a second sound signal (302) of the at least two different sound signals (301, 302) indicating a second location of the second sound signal (302) with respect to the information on the geometry (331 341) of the spatially extended sound source, the second location information being different from the first location information.

Non-transitory digital storage medium having a computer program stored thereon to perform the method for reproducing a spatially extended sound source comprising a defined position and geometry in a space, the method comprising:

• receiving a listener position;
• calculating data on a hull associated with the spatially extended sound source and projecting the data on the hull in a direction towards the listener position to obtain a projection of the hull as output data, or projecting information on a geometry of the spatially extended sound source towards the listener position and computing data on a hull of a result of the projecting to obtain output data;
• calculating positions of at least two sound sources for the spatially extended sound source using the output data;
• and
• rendering the at least two sound sources at the positions of the at least two sound sources to acquire a reproduction of the spatially extended sound source comprising two or more output signals, wherein the rendering comprises using different sound signals for the positions of the at least two sound sources, wherein the different sound signals are associated with the spatially extended sound source,
• when said computer program is run by a computer.