Systems, methods, and apparatus for spatially directive filtering
First Claim
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1. A method of processing a multichannel audio signal, said method comprising:
- calculating, by an apparatus, a first angle of arrival, relative to an axis of a first pair of microphones, for a first source component;
calculating, by the apparatus, a second angle of arrival, relative to an axis of a second pair of microphones, for the first source component;
based on said first angle of arrival and said second angle of arrival, applying, by the apparatus, a spatially directive filter, based on a first pairwise steering vector formed by the calculated first angle of arrival relative to the axis of the first pair of microphones and a second pairwise steering vector formed by the calculated second angle of arrival relative to the axis of the second pair of microphones, to the multichannel audio signal to produce an output signal.
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Abstract
Systems, methods, and apparatus are described for applying, based on angles of arrival of source components relative to the axes of different microphone pairs, a spatially directive filter to a multichannel audio signal to produce an output signal.
84 Citations
49 Claims
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1. A method of processing a multichannel audio signal, said method comprising:
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calculating, by an apparatus, a first angle of arrival, relative to an axis of a first pair of microphones, for a first source component; calculating, by the apparatus, a second angle of arrival, relative to an axis of a second pair of microphones, for the first source component; based on said first angle of arrival and said second angle of arrival, applying, by the apparatus, a spatially directive filter, based on a first pairwise steering vector formed by the calculated first angle of arrival relative to the axis of the first pair of microphones and a second pairwise steering vector formed by the calculated second angle of arrival relative to the axis of the second pair of microphones, to the multichannel audio signal to produce an output signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An apparatus for processing a multichannel audio signal, said apparatus comprising:
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means for calculating a first angle of arrival, relative to an axis of a first pair of microphones, for a first source component; means for calculating a second angle of arrival, relative to an axis of a second pair of microphones, for the first source component; means for applying, based on said first angle of arrival and said second angle of arrival, a spatially directive filter, based on a first pairwise steering vector formed by the calculated first angle of arrival relative to the axis of the first pair of microphones and a second pairwise steering vector formed by the calculated second angle of arrival relative to the axis of the second pair of microphones, to the multichannel audio signal to produce an output signal. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. An apparatus for processing a multichannel audio signal, said apparatus comprising:
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a calculator configured to calculate; a first angle of arrival, relative to an axis of a first pair of microphones, for a first source component; and a second angle of arrival, relative to an axis of a second pair of microphones, for the first source component; and a discriminator configured to apply, based on said first angle of arrival and said second angle of arrival, a spatially directive filter, based on a first pairwise steering vector formed by the first angle of arrival relative to the axis of the first pair of microphones and a second pairwise steering vector formed by the second angle of arrival relative to the axis of the second pair of microphones, to the multichannel audio signal to produce an output signal. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
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49. A non-transitory tangible computer-readable medium having instructions thereon, the instructions comprising code for causing an apparatus to:
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calculate, by the apparatus, a first angle of arrival, relative to an axis of a first pair of microphones, for the first source component; calculate, by the apparatus, a second angle of arrival, relative to an axis of a second pair of microphones, for the first source component; and based on said first angle of arrival and said second angle of arrival, apply, at the apparatus, a spatially directive filter, based on a first pairwise steering vector formed by the first angle of arrival relative to the axis of the first pair of microphones and a second pairwise steering vector formed by the second angle of arrival relative to the axis of the second pair of microphones, to the multichannel audio signal to produce an output signal.
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Specification