Method and apparatus for providing user interface using acoustic signal, and device including user interface
First Claim
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1. An apparatus to provide a user interface of a device, comprising:
- a surface acoustic signal acquisition unit configured to acquire a surface acoustic signal propagated through a medium disposed outside of the device;
a pattern recognition unit configured to (1) estimate a type of a medium using a test signal, (2) estimate a tool generating the surface acoustic signal based on frequency-domain features of the surface acoustic signal and (3) recognize a pattern of the surface acoustic signal based on the type of the medium and the tool by analyzing features of the surface acoustic signal, the pattern recognition unit comprisinga feature extractor configured to extract at least one time-domain feature of the surface acoustic signal, anda pattern analyzer configured to analyze the pattern of the surface acoustic signal based on the at least one time-domain feature, the type of the medium and the tool; and
a user input identification unit configured to identify a user'"'"'s input signal by classifying minimal meaningful units corresponding to the pattern of the surface acoustic signal and combining the minimal meaningful units to form one or more input characters.
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Abstract
A user interface using an acoustic signal is provided. A device with the user interface includes a sensor to acquire a surface acoustic signal generated outside of the device, and at least one processor. The processor classifies patterns of the surface acoustic signal by analyzing features of the surface acoustic signal, and identifies a user'"'"'s input signal corresponding to the surface acoustic signal based on the pattern of the surface acoustic signal.
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Citations
21 Claims
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1. An apparatus to provide a user interface of a device, comprising:
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a surface acoustic signal acquisition unit configured to acquire a surface acoustic signal propagated through a medium disposed outside of the device; a pattern recognition unit configured to (1) estimate a type of a medium using a test signal, (2) estimate a tool generating the surface acoustic signal based on frequency-domain features of the surface acoustic signal and (3) recognize a pattern of the surface acoustic signal based on the type of the medium and the tool by analyzing features of the surface acoustic signal, the pattern recognition unit comprising a feature extractor configured to extract at least one time-domain feature of the surface acoustic signal, and a pattern analyzer configured to analyze the pattern of the surface acoustic signal based on the at least one time-domain feature, the type of the medium and the tool; and a user input identification unit configured to identify a user'"'"'s input signal by classifying minimal meaningful units corresponding to the pattern of the surface acoustic signal and combining the minimal meaningful units to form one or more input characters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of providing a user interface of a device, the method comprising:
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acquiring a surface acoustic signal; extracting at least one time-domain feature of the surface acoustic signal; determining a type of a medium using a test signal; estimating a tool generating the surface acoustic signal based on frequency-domain features of the surface acoustic signal; analyzing a pattern of the surface acoustic signal based on the at least one time-domain feature, the type of the medium and the tool; and identifying a user'"'"'s input signal by classifying minimal meaningful units corresponding to the pattern of the surface acoustic signal and combining the minimal meaningful units to form one or more input characters. - View Dependent Claims (16, 17, 18, 19, 20)
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21. A method of providing a user interface of a device, the method comprising:
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acquiring an acoustic signal generated by a user interacting with a medium of an object outside of the device; analyzing the acquired acoustic signal through a process that comprises separating the surface acoustic signal into a plurality of frames based on at least one time-domain feature of the acquired acoustic signal; and identifying the user'"'"'s input signal by classifying minimal meaningful units corresponding to a pattern of the acoustic signal and combining the minimal meaningful units to form one or more input characters.
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Specification