Speaking period detection device, voice recognition processing device, transmission system, signal level control device and speaking period detection method
First Claim
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1. A speaking period detection device comprising:
- an electromyography (EMG) detection unit for detecting an EMG from a pair of electrodes provided on a portion of the case of a terminal used by a speaker for speaking, the portion being in contact with the speaker'"'"'s skin while the speaker is speaking;
a speaking period detection unit for detecting a speaking period a value obtained from a feature amount extracted from the EMG detected by the EMG detection unit with a predetermined threshold to detect a speech start timing and a speech end timing of the speaking period; and
a counter for counting the result of the comparison of the value obtained from the feature amount with the predetermined threshold,wherein the speaking period detection unit determines the speaking period only when a count value of the counter exceeds a predetermined value, andwherein the feature amount is any one of a root mean square (RMS) value, an average relative variation (ARV) value, an integrated electro muscle graphy (iEMG), a frequency spectrum of an EMG, and the number of crossings with a threshold value.
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Abstract
A speaking period required for a voice recognition processing is detected with a simple and robust approach. A speaking period is detected based on an EMG generated when a speaker speaks. A large amplitude is observed in an EMG as muscular activity is caused when a speaker speaks. By observing this, a speaking period can be detected. The EMG can be measured from the speaker'"'"'s skin via electrodes provided on a mobile-type terminal. Since a mobile-type terminal is usually pressed to the skin for use, affinity between this use form and the present invention is very high.
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Citations
9 Claims
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1. A speaking period detection device comprising:
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an electromyography (EMG) detection unit for detecting an EMG from a pair of electrodes provided on a portion of the case of a terminal used by a speaker for speaking, the portion being in contact with the speaker'"'"'s skin while the speaker is speaking; a speaking period detection unit for detecting a speaking period a value obtained from a feature amount extracted from the EMG detected by the EMG detection unit with a predetermined threshold to detect a speech start timing and a speech end timing of the speaking period; and a counter for counting the result of the comparison of the value obtained from the feature amount with the predetermined threshold, wherein the speaking period detection unit determines the speaking period only when a count value of the counter exceeds a predetermined value, and wherein the feature amount is any one of a root mean square (RMS) value, an average relative variation (ARV) value, an integrated electro muscle graphy (iEMG), a frequency spectrum of an EMG, and the number of crossings with a threshold value. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A speaking period detection method comprising:
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detecting an electromyography (EMG) from a pair of electrodes provided on a portion of the case of a terminal used by a speaker for speaking, the portion being in contact with the speaker'"'"'s skin while the speaker is speaking; detecting a speaking period, by comparing a value obtained from a feature amount extracted from the EMG detected with a predetermined threshold to detect a speech start timing and a speech end timing of the speaking period; and counting the result of the comparison of the value obtained from the feature amount with the predetermined threshold, wherein the speaking period is determined only when a count value of the counter exceeds a predetermined value, and wherein the feature amount is any one of a root mean square (RMS) value, an average relative variation (ARV) value, an integrated electro muscle graphy (iEMG), a frequency spectrum of an EMG, and the number of crossings with a threshold value.
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8. A mobile terminal comprising:
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a speaking period detection device; and a pair of electrodes provided on a portion, of the mobile terminal, in contact with a facial skin surface of a speaker who is speaking, the speaking period detection device comprising; an electromyography (EMG) detection unit for detecting an EMG from the pair of electrodes; a speaking period detection unit for detecting a speaking period, by comparing a value obtained from a feature amount extracted from the EMG detected by the EMG detection unit with a predetermined threshold to detect a speech start timing and a speech end timing of the speaking period; and a counter for counting the result of the comparison of the value obtained from the feature amount with the predetermined threshold, wherein the speaking period detection unit determines the speaking period only when a count value of the counter exceeds a predetermined value. - View Dependent Claims (9)
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Specification