Systems, methods, and apparatus for estimating direction of arrival
First Claim
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1. A method of processing a multichannel signal, said method comprising:
- for a first pair of channels of the multichannel signal, calculating a first plurality of directional fitness measures, wherein each among the first plurality of directional fitness measures is based on a corresponding different one among a plurality of candidate directions;
for a second pair of channels of the multichannel signal that is different than the first pair, calculating a second plurality of directional fitness measures, wherein each among the second plurality of directional fitness measures is based on a corresponding different one among the plurality of candidate directions; and
based on the first plurality of directional fitness measures and the second plurality of directional fitness measures, selecting a first direction from among the plurality of candidate directions,wherein each of the first plurality of directional fitness measures is based on a difference, at a first frequency component of the multichannel signal, between the channels of the first pair,wherein each of the second plurality of directional fitness measures is based on a difference, at the first frequency component, between the channels of the second pair, andwherein said selecting the first direction from among the plurality of candidate directions comprises determining a minimum directional error among the first plurality of directional fitness measures and the second plurality of directional fitness measures.
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Abstract
Systems, methods, and apparatus for matching pair-wise differences (e.g., phase delay measurements) to an inventory of source direction candidates, and application of pair-wise source direction estimates, are described.
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Citations
38 Claims
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1. A method of processing a multichannel signal, said method comprising:
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for a first pair of channels of the multichannel signal, calculating a first plurality of directional fitness measures, wherein each among the first plurality of directional fitness measures is based on a corresponding different one among a plurality of candidate directions; for a second pair of channels of the multichannel signal that is different than the first pair, calculating a second plurality of directional fitness measures, wherein each among the second plurality of directional fitness measures is based on a corresponding different one among the plurality of candidate directions; and based on the first plurality of directional fitness measures and the second plurality of directional fitness measures, selecting a first direction from among the plurality of candidate directions, wherein each of the first plurality of directional fitness measures is based on a difference, at a first frequency component of the multichannel signal, between the channels of the first pair, wherein each of the second plurality of directional fitness measures is based on a difference, at the first frequency component, between the channels of the second pair, and wherein said selecting the first direction from among the plurality of candidate directions comprises determining a minimum directional error among the first plurality of directional fitness measures and the second plurality of directional fitness measures. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An apparatus for processing a multichannel signal, said apparatus comprising:
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means for calculating, for a first pair of channels of the multichannel signal, a first plurality of directional fitness measures, wherein each among the first plurality of directional fitness measures is based on a corresponding different one among a plurality of candidate directions; means for calculating, for a second pair of channels of the multichannel signal that is different than the first pair, a second plurality of directional fitness measures, wherein each among the second plurality of directional fitness measures is based on a corresponding different one among the plurality of candidate directions; and means for selecting a first direction from among the plurality of candidate directions, based on the first plurality of directional fitness measures and the second plurality of directional fitness measures, wherein each of the first plurality of directional fitness measures is based on a difference, at a first frequency component of the multichannel signal, between the channels of the first pair, wherein each of the second plurality of directional fitness measures is based on a difference, at the first frequency component, between the channels of the second pair, and wherein said means for selecting the first direction from among the plurality of candidate directions comprises means for determining a minimum directional error among the first plurality of directional fitness measures and the second plurality of directional fitness measures. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. An apparatus for processing a multichannel signal, said apparatus comprising:
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a measure calculator configured to calculate, for a first pair of channels of the multichannel signal, a first plurality of directional fitness measures, wherein each among the first plurality of directional fitness measures is based on a corresponding different one among a plurality of candidate directions, and to calculate, for a second pair of channels of the multichannel signal that is different than the first pair, a second plurality of directional fitness measures, wherein each among the second plurality of directional fitness measures is based on a corresponding different one among the plurality of candidate directions; and a selector configured to select a first direction from among the plurality of candidate directions, based on the first plurality of directional fitness measures and the second plurality of directional fitness measures, wherein each of the first plurality of directional fitness measures is based on a difference, at a first frequency component of the multichannel signal, between the channels of the first pair, wherein each of the second plurality of directional fitness measures is based on a difference, at the first frequency component, between the channels of the second pair, and wherein said error calculator is configured to determine a minimum directional error among the first plurality of directional fitness measures and the second plurality of directional fitness measures. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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Specification