Apparatus for merging spatial audio streams

A method for merging a first spatial audio stream with a second spatial audio stream to acquire a merged audio stream, comprising:

• estimating a first wave representation comprising a first wave direction measure being a directional quantity of a first wave and a first wave field measure being related to a magnitude of the first wave for the first spatial audio stream, the first spatial audio stream comprising a first audio representation comprising a measure for a pressure or a magnitude of a first audio signal and a first direction of arrival;
• estimating a second wave representation comprising a second wave direction measure being a directional quantity of a second wave and a second wave field measure being related to a magnitude of the second wave for the second spatial audio stream, the second spatial audio stream comprising a second audio representation comprising a measure for a pressure or a magnitude of a second audio signal and a second direction of arrival;
• processing the first wave representation and the second wave representation to acquire a merged wave representation comprising a merged wave field measure, a merged direction of arrival measure and a merged diffuseness parameter, wherein the merged diffuseness parameter is based on the merged wave field measure, the first audio representation and the second audio representation, and wherein the merged wave field measure is based on the first wave filed measure, the second wave field measure, the first wave direction measure, and the second wave direction measure;
• processing the first audio representation and the second audio representation to acquire a merged audio representation;
• and
• providing the merged audio stream comprising the merged audio representation, a merged direction of arrival measure and the merged diffuseness parameter.

Non-transitory storage medium having stored thereon a computer program comprising a program code for performing the method, when the program code runs on a computer or a processor, for merging a first spatial audio stream with a second spatial audio stream to acquire a merged audio stream, the method comprising:

• estimating a first wave representation comprising a first wave direction measure being a directional quantity of a first wave and a first wave field measure being related to a magnitude of the first wave for the first spatial audio stream, the first spatial audio stream comprising a first audio representation comprising a measure for a pressure or a magnitude of a first audio signal and a first direction of arrival;
• estimating a second wave representation comprising a second wave direction measure being a directional quantity of a second wave and a second wave field measure being related to a magnitude of the second wave for the second spatial audio stream, the second spatial audio stream comprising a second audio representation comprising a measure for a pressure or a magnitude of a second audio signal and a second direction of arrival;
• processing the first wave representation and the second wave representation to acquire a merged wave representation comprising a merged wave field measure, a merged direction of arrival measure and a merged diffuseness parameter, wherein the merged diffuseness parameter is based on the merged wave field measure, the first audio representation and the second audio representation, and wherein the merged wave field measure is based on the first wave filed measure, the second wave field measure, the first wave direction measure, and the second wave direction measure;
• processing the first audio representation and the second audio representation to acquire a merged audio representation;
• and
• providing the merged audio stream comprising the merged audio representation, a merged direction of arrival measure and the merged diffuseness parameter.