Device and method for obtaining a first order ambisonic signal
AssigneeHuawei Technologies Co., Ltd.
InventorsMohammad TAGHIZADEH, Christof FALLER, Alexis FAVROT
Life of this patent
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Abstract
A device and method, respectively, obtain a first order ambisonic (FOA) signal from signals of multiple microphones, e.g., at least four or five directive microphones. The device and method determine a look direction of each microphone, and calculate a decoding matrix based on the determined look directions. The decoding matrix is a matrix suitable for decoding a FOA signal into the signals of the microphones. Further, the device and method invert the decoding matrix to obtain an encoding matrix, and encode the signals of the microphones based on the encoding matrix to obtain the FOA signal.
Claims16
A device for obtaining a first order ambisonic (FOA) signal from signals of at least four directive microphones, the device being configured to:
- determine look directions of the microphones;
- calculate a decoding matrix based on the determined look directions, wherein the decoding matrix is suitable for decoding the FOA signal into the signals of the microphones;
- invert the decoding matrix to obtain an encoding matrix;
- and
- encode the signals of the microphones based on the encoding matrix to obtain the FOA signal.
A method for obtaining a first order ambisonic (FOA) signal from signals of at least four directive microphones, the method comprising:
- determining look directions of the microphones,
- calculating a decoding matrix based on the determined look directions, wherein the decoding matrix is suitable for decoding the FOA signal into the signals of the microphones,
- inverting the decoding matrix to obtain an encoding matrix, and
- encoding the signals of the microphones based on the encoding matrix to obtain the FOA signal.
Dependencies are inferred from the claim text.