Time delay estimation apparatus and time delay estimation method therefor
AssigneeKorea Research Institute of Standards and Science
InventorsHyu-Sang Kwon, WanHo Cho
Life of this patent
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Abstract
The present invention relates to a time delay estimation device. The time delay estimation device of the present invention includes a sound signal detection unit configured to detect sound signals through a plurality of microphones, a frequency domain conversion unit configured to convert the detected sound signals into signals of a frequency domain, and a time delay estimation unit configured to estimate a time delay on the basis of a slope of a phase difference between the sound signals converted into the frequency domain.
Claims10
A time delay estimation device comprising:
- a sound signal detection unit configured to detect sound signals through a plurality of microphones;
- a frequency domain conversion unit configured to convert the detected sound signals into signals of a frequency domain;
- and
- a time delay estimation unit configured to estimate a time delay on the basis of a slope of a phase difference between the sound signals converted into the frequency domain,
- wherein the time delay estimation unit comprises:
- a phase difference calculation unit configured to calculate phase differences among the plurality of microphones and estimate the time delay on the basis of slopes of the calculated phase differences;
- a direction vector estimation unit configured to estimate a direction vector on the basis of the time delay;
- and
- a center position correction unit configured to generate, on the basis of the estimated direction vector, average signal data through correction of a center position according to a reference time applied to a signal of each of the plurality of microphones.
A time delay estimation method for a time delay estimation device, comprising:
- detecting sound signals through a plurality of microphones;
- converting the detected sound signals into signals of a frequency domain;
- and
- estimating a time delay on the basis of a slope of a phase difference between the sound signals converted into the frequency domain,
- wherein the estimating the time delay comprises:
- calculating phase differences among the plurality of microphones and estimating the time delay from slopes of the calculated phase differences;
- estimating a direction vector on the basis of the time delay;
- and
- generating, on the basis of the estimated direction vector, average signal data through correction of a center position according to a reference time applied to a signal of each of the plurality of microphones.
Dependencies are inferred from the claim text.