Apparatus and method for screen related audio object remapping

A decoder device comprising:

• a USAC decoder for decoding a bitstream to acquire one or more audio input channels, to acquire one or more input audio objects, to acquire compressed object metadata and to acquire one or more SAOC transport channels,
• an SAOC decoder for decoding the one or more SAOC transport channels to acquire a first group of one or more rendered audio objects,
• an apparatus for generating loudspeaker signals, comprising:
• an object metadata processor, and
• an object renderer,
• wherein the object renderer is configured to receive an audio object,
• wherein the object metadata processor is configured to receive metadata, comprising an indication on whether the audio object is screen-related, and further comprising a first position of the audio object,
• wherein the object metadata processor is configured to calculate a second position of the audio object depending on the first position of the audio object and depending on a size of a screen if the audio object is indicated in the metadata as being screen-related,
• wherein the object renderer is configured to generate the loudspeaker signals depending on the audio object and depending on position information,
• wherein the object metadata processor is configured to feed the first position of the audio object as the position information into the object renderer if the audio object is indicated in the metadata as being not screen-related, and
• wherein the object metadata processor is configured to feed the second position of the audio object as the position information into the object renderer if the audio object is indicated in the metadata as being screen-related,
• wherein said apparatus comprises
• an object metadata decoder, being the object metadata processor of said apparatus, and being implemented for decoding the compressed object metadata to acquire uncompressed metadata, and
• the object renderer of said apparatus, for rendering the one or more input audio objects depending on the uncompressed metadata to acquire a second group of one or more rendered audio objects,
• a format converter for converting the one or more audio input channels to acquire one or more converted channels, and
• a mixer for mixing the one or more audio objects of the first group of one or more rendered audio objects, the one or more audio objects of the second group of one or more rendered audio objects and the one or more converted channels to acquire one or more decoded audio channels.

A method for generating loudspeaker signals, comprising:

• receiving an audio object,
• receiving metadata, comprising an indication on whether the audio object is screen-related, and further comprising a first position of the audio object,
• calculating a second position of the audio object depending on the first position of the audio object and depending on a size of a screen if the audio object is indicated in the metadata as being screen-related,
• generating the loudspeaker signals depending on the audio object and depending on position information,
• wherein the position information is the first position of the audio object if the audio object is indicated in the metadata as being not screen-related, and
• wherein the position information is the second position of the audio object if the audio object is indicated in the metadata as being screen-related.

A non-transitory digital storage medium having a computer program stored thereon to perform the method for generating loudspeaker signals, said method comprising:

• receiving an audio object,
• receiving metadata, comprising an indication on whether the audio object is screen-related, and further comprising a first position of the audio object,
• calculating a second position of the audio object depending on the first position of the audio object and depending on a size of a screen if the audio object is indicated in the metadata as being screen-related,
• generating the loudspeaker signals depending on the audio object and depending on position information,
• wherein the position information is the first position of the audio object if the audio object is indicated in the metadata as being not screen-related, and
• wherein the position information is the second position of the audio object if the audio object is indicated in the metadata as being screen-related,
• when said computer program is run by a computer.