Direction of arrival estimation device, system, and direction of arrival estimation method
AssigneePanasonic Intellectual Property Corporation of America
InventorsRohith MARS, Srikanth NAGISETTY, Chong Soon LIM, Hiroyuki EHARA, Akihisa KAWAMURA
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Abstract
Provided is a direction of arrival estimation device wherein: a calculation circuit calculates a frequency weighting factor for each of a plurality of frequency components of signals recorded in a microphone array, on the basis of the differences among unit vectors indicating the directions of the sound sources of each of the plurality of frequency components; and an estimation circuit estimates the direction of arrival of a signal from the sound source, on the basis of the frequency weighting factors.
Claims9
A direction-of-arrival estimation apparatus, comprising:
- calculation circuitry, which, in operation, calculates a frequency weighting factor for each of a plurality of frequency components of a signal recorded by a microphone array based on a difference between unit vectors each indicating a direction of a sound source in a corresponding one of the plurality of frequency components;
- and
- estimation circuitry, which, in operation, estimates a direction of arrival of the signal from the sound source based on the frequency weighting factor.
A system, comprising:
- a direction-of-arrival estimation apparatus, which in operation, estimates a direction of arrival of a signal from a sound source;
- a beamformer, which in operation, extracts an acoustic signal by beamforming toward the direction of arrival;
- an encoder, which in operation, encodes the acoustic signal;
- and
- a decoder, which in operation, decodes the encoded acoustic signal, wherein, the direction-of-arrival estimation apparatus
- calculates a frequency weighting factor for each of a plurality of frequency components of the signal recorded by a microphone array based on a difference between unit vectors each indicating a direction of the sound source in a corresponding one of the plurality of frequency components, and
- estimates the direction of arrival based on the frequency weighting factor.
A direction-of-arrival estimation method, comprising:
- calculating, by a direction-of-arrival estimation apparatus, a frequency weighting factor for each of a plurality of frequency components of a signal recorded by a microphone array based on a difference between unit vectors each indicating a direction of a sound source in a corresponding one of the plurality of frequency components;
- and
- estimating, by the direction-of-arrival estimation apparatus, a direction of arrival of the signal from the sound source based on the frequency weighting factor.
Dependencies are inferred from the claim text.