Apparatus, method and computer program for encoding, decoding, scene processing and other procedures related to dirac based spatial audio coding

A method for generating a description of a combined audio scene, comprising:

• receiving a first description of a first scene in a first format and receiving a second description of a second scene in a second format, wherein the second format is different from the first format;
• converting the first description into a common format and converting the second description into the common format, when the second format is different from the common format;
• and
• combining the first description in the common format and the second description in the common format to acquire the combined audio scene.

A non-transitory digital storage medium having a computer program stored thereon to perform the method for generating a description of a combined audio scene, comprising:

• receiving a first description of a first scene in a first format and receiving a second description of a second scene in a second format, wherein the second format is different from the first format;
• converting the first description into a common format and converting the second description into the common format, when the second format is different from the common format;
• and
• combining the first description in the common format and the second description in the common format to acquire the combined audio scene,
• when said computer program is run by a computer.

An apparatus for performing a synthesis of a plurality of audio scenes, comprising:

• an input interface for receiving a first DirAC description of a first scene and for receiving a second DirAC description of a second scene and one or more transport channels;
• and
• a DirAC synthesizer for synthesizing the plurality of audio scenes in a spectral domain to acquire a spectral domain audio signal representing the plurality of audio scenes;
• and
• a spectrum-time converter for converting the spectral domain audio signal into a time-domain.

A method for performing a synthesis of a plurality of audio scenes, comprising:

• receiving a first DirAC description of a first scene and receiving a second DirAC description of a second scene and one or more transport channels;
• and
• synthesizing the plurality of audio scenes in a spectral domain to acquire a spectral domain audio signal representing the plurality of audio scenes;
• and
• spectral-time converting the spectral domain audio signal into a time-domain.

A non-transitory digital storage medium having a computer program stored thereon to perform the method for performing a synthesis of a plurality of audio scenes, comprising:

• receiving a first DirAC description of a first scene and receiving a second DirAC description of a second scene and one or more transport channels;
• and
• synthesizing the plurality of audio scenes in a spectral domain to acquire a spectral domain audio signal representing the plurality of audio scenes;
• and
• spectral-time converting the spectral domain audio signal into a time-domain,
• when said computer program is run by a computer..

An audio data converter, comprising:

• an input interface for receiving an object description of an audio object comprising audio object metadata;
• a metadata converter for converting the audio object metadata into DirAC metadata;
• and
• an output interface for transmitting or storing the DirAC metadata.

A method for performing an audio data conversion, comprising:

• receiving an object description of an audio object comprising audio object metadata;
• converting the audio object metadata into DirAC metadata;
• and
• transmitting or storing the DirAC metadata.

A non-transitory digital storage medium having a computer program stored thereon to perform the method for performing an audio data conversion, comprising:

• receiving an object description of an audio object comprising audio object metadata;
• converting the audio object metadata into DirAC metadata;
• and
• transmitting or storing the DirAC metadata,
• when said computer program is run by a computer.

A non-transitory digital storage medium having a computer program stored thereon to perform the method of encoding an audio scene, comprising:

• receiving a DirAC description of an audio scene comprising DirAC metadata and receiving an object signal comprising audio object metadata;
• and
• generating a combined metadata description comprising the DirAC metadata and the object metadata, wherein the DirAC metadata comprises a direction of arrival for individual time-frequency tiles and wherein the object metadata comprises a direction or, additionally, a distance or a diffuseness of an individual object,
• when said computer program is run by a computer.

An apparatus for performing a synthesis of audio data, comprising:

• an input interface for receiving a DirAC description of one or more audio objects or a multi-channel signal or a first order Ambisonics signal or a high order Ambisonics signal, wherein the DirAC description comprises position information of the one or more objects or side information for the first order Ambisonics signal or the high order Ambisonics signal or a position information for the multi-channel signal as side information or from a user interface;
• a manipulator for manipulating the DirAC description of the one or more audio objects, the multi-channel signal, the first order Ambisonics signal or the high order Ambisonics signal to acquire a manipulated DirAC description;
• and
• a DirAC synthesizer for synthesizing the manipulated DirAC description to acquire synthesized audio data.

A method for performing a synthesis of audio data, comprising:

• receiving a DirAC description of one or more audio objects or a multi-channel signal or a first order Ambisonics signal or a high order Ambisonics signal, wherein the DirAC description comprising position information of the one or more objects or of the multi-channel signal or additional information for the first order Ambisonics signal or the high order Ambisonics signal as side information or for a user interface;
• manipulating the DirAC description to acquire a manipulated DirAC description;
• and
• synthesizing the manipulated DirAC description to acquire synthesized audio data.

A non-transitory digital storage medium having a computer program stored thereon to perform the method for performing a synthesis of audio data, comprising:

• receiving a DirAC description of one or more audio objects or a multi-channel signal or a first order Ambisonics signal or a high order Ambisonics signal, wherein the DirAC description comprising position information of the one or more objects or of the multi-channel signal or additional information for the first order Ambisonics signal or the high order Ambisonics signal as side information or for a user interface;
• manipulating the DirAC description to acquire a manipulated DirAC description;
• and
• synthesizing the manipulated DirAC description to acquire synthesized audio data,
• when said computer program is run by a computer.