Concept for combining multiple parametrically coded audio sources

Method of generating an audio output signal, the method comprising:

• receiving a first audio signal comprising a first down-mix channel having information on two or more first original channels, and comprising an original parameter associated with one of the first original channels describing a property of one of the first original channels with respect to a reference channel and a second audio signal comprising a second down-mix channel having information on at least one second original channel;
• deriving a combined down-mix channel by combining the first down-mix channel and the second down-mix channel;
• deriving a first combined parameter describing the property of one of the first original channels with respect to a common reference channel and a second combined parameter describing the property of another one of the first original channels or of the at least one second original channel with respect to a common reference channel;
• and
• outputting the audio output signal comprising the combined down-mix channel and the first and second combined parameters.

Conferencing System having an audio signal generator for generating an audio output signal, comprising:

• an audio signal receiver for receiving:
• a first audio signal comprising a first down-mix channel having information on two or more first original channels, and comprising an original parameter associated with one of the first original channels describing a property of one of the first original channels with respect to a reference channel;
• and
• a second audio signal comprising a second down-mix channel having information on at least one second original channel;
• a channel combiner for deriving a combined down-mix channel by combining the first down-mix channel and the second down-mix channel;
• a parameter calculator for deriving a first combined parameter describing the property of one of the first original channels with respect to a common reference channel, and a second combined parameter describing the property of another one of the first original channels or of the at least one second original channel with respect to the common reference channel;
• and
• an output interface for outputting the audio output signal comprising the combined down-mix channel, the first and second combined parameter.

A non-transitory storage medium having stored thereon a computer program for, when running on a computer, implementing a method for generating an audio output signal, the method comprising:

• receiving a first audio signal comprising a first down-mix channel having information on two or more first original channels, and comprising an original parameter associated with one of the first original channels describing a property of one of the first original channels with respect to a reference channel and a second audio signal comprising a second down-mix channel having information on at least one second original channel;
• deriving a combined down-mix channel by combining the first down-mix channel and the second down-mix channel;
• deriving a first combined parameter describing the property of one of the first original channels with respect to a common reference channel and a second combined parameter describing the property of another one of the first original channels or of the at least one second original channel with respect to a common reference channel;
• and
• outputting the audio output signal comprising the combined down-mix channel and the first and second combined parameters.

Method of generating an audio output signal, the method comprising:

• receiving a first audio signal comprising a first down-mix channel having information on two or more first original channels, and comprising an original parameter associated with one of the first original channels describing a property of one of the first original channels with respect to a reference channel and a second audio signal comprising a second down-mix channel having information on at least one second original channel;
• deriving a combined down-mix channel by combining the first down-mix channel and the second down-mix channel;
• deriving a first combined parameter describing the property of one of the first original channels with respect to a common reference channel and a second combined parameter describing the property of another one of the first original channels or of the at least one second original channel with respect to a common reference channel;
• outputting the audio output signal comprising the combined down-mix channel and the first and second combined parameters;
• and
• wherein the original parameter is derived in the frequency domain in frequency bands.

A non-transitory storage medium having stored thereon a computer program for, when running on a computer, implementing a method for generating an audio output signal, the method comprising:

• receiving a first audio signal comprising a first down-mix channel having information on two or more first original channels, and comprising an original parameter associated with one of the first original channels describing a property of one of the first original channels with respect to a reference channel and a second audio signal comprising a second down-mix channel having information on at least one second original channel;
• deriving a combined down-mix channel by combining the first down-mix channel and the second down-mix channel;
• deriving a first combined parameter describing the property of one of the first original channels with respect to a common reference channel and a second combined parameter describing the property of another one of the first original channels or of the at least one second original channel with respect to a common reference channel;
• and
• outputting the audio output signal comprising the combined down-mix channel and the first and second combined parameters;
• and
• wherein the original parameter is derived in the frequency domain in frequency bands.