Method and apparatus for conversion between multi-channel audio formats
First Claim
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1. Apparatus for conversion of an input multi-channel representation into a different output multi-channel representation of a spatial audio signal, comprising:
- a simulator for simulating a recording of a number of audio channels corresponding to loudspeakers associated to the input multi-channel representation to obtain simulated microphone signals;
an analyzer for deriving, from the simulated microphone signals, an intermediate representation of the spatial audio signal, the intermediate representation comprising direction parameters indicating a direction of origin of a portion of the spatial audio signal; and
a signal composer for generating the output multi-channel representation of the spatial audio signal using the intermediate representation of the spatial audio signal.
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Abstract
An input multi-channel representation is converted into a different output multi-channel representation of a spatial audio signal, in that an intermediate representation of the spatial audio signal is derived, the intermediate representation having direction parameters indicating a direction of origin of a portion of the spatial audio signal; and in that the output multi-channel representation of the spatial audio signal is generated using the intermediate representation of the spatial audio signal.
72 Citations
22 Claims
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1. Apparatus for conversion of an input multi-channel representation into a different output multi-channel representation of a spatial audio signal, comprising:
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a simulator for simulating a recording of a number of audio channels corresponding to loudspeakers associated to the input multi-channel representation to obtain simulated microphone signals; an analyzer for deriving, from the simulated microphone signals, an intermediate representation of the spatial audio signal, the intermediate representation comprising direction parameters indicating a direction of origin of a portion of the spatial audio signal; and a signal composer for generating the output multi-channel representation of the spatial audio signal using the intermediate representation of the spatial audio signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. Method for conversion of an input multi-channel representation into a different output multi-channel representation of a spatial audio signal, the method comprising:
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simulating a recording of a number of audio channels corresponding to loudspeakers associated to the input multi-channel representation to obtain simulated microphone signals; deriving, from the simulated microphone signals, an intermediate representation of the spatial audio signal, the intermediate representation comprising direction parameters indicating a direction of origin of a portion of the spatial audio signal; and generating the output multi-channel representation of the spatial audio signal using the intermediate representation of the spatial audio signal.
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22. A non-transitory storage medium having stored thereon a computer program for, when running on a computer, implementing the method for conversion of a multi-channel representation into a different output multi-channel representation of a spatial audio signal, the method comprising:
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simulating a recording of a number of audio channels corresponding to loudspeakers associated to the input multi-channel representation to obtain simulated microphone signals; deriving, from the simulated microphone signals, an intermediate representation of the spatial audio signal, the intermediate representation comprising direction parameters indicating a direction of origin of a portion of the spatial audio signal; and generating the output multi-channel representation of the spatial audio signal using the intermediate representation of the spatial audio signal.
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Specification