Audience state estimation system, audience state estimation method, and audience state estimation program
First Claim
Patent Images
1. An audience state estimation system comprising:
- sound-obtaining device for obtaining sound from an audience and generating an audio signal according to the sound thus obtained;
volume detection device for detecting a volume of the sound from said audience based on said audio signal,wherein the volume detection device calculates variance of volume of said audio signal for each frame, and averages the calculated variance of the volume in time direction to calculate a time macro volume, the number of frames averaged in calculating the time macro volume being set according to an audience state to be estimated; and
estimation device for estimating an audience state based on said volume.
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Abstract
Video signal relative to an imaged audience and audio signal according to voices from the audience are generated in an input unit. A characteristic amount detection unit detects information on a movement amount, movement periodicity, a volume, voice periodicity of the audience, and a frequency component of voices from the audience based on the video signal or the audio signal. An estimation unit estimates an audience state based on the detected result. An output unit outputs the estimated result of the audience state. The audience state can be easily estimated without observing the audience state by a person.
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Citations
33 Claims
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1. An audience state estimation system comprising:
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sound-obtaining device for obtaining sound from an audience and generating an audio signal according to the sound thus obtained; volume detection device for detecting a volume of the sound from said audience based on said audio signal, wherein the volume detection device calculates variance of volume of said audio signal for each frame, and averages the calculated variance of the volume in time direction to calculate a time macro volume, the number of frames averaged in calculating the time macro volume being set according to an audience state to be estimated; and estimation device for estimating an audience state based on said volume. - View Dependent Claims (2, 3, 4, 5)
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6. An audience state estimation system comprising:
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sound-obtaining device for obtaining sound from an audience and generating an audio signal according to the sound thus obtained; sound periodicity detection device for detecting sound periodicity from said audience based on said audio signal, wherein the sound periodicity detection device calculates a ratio of a power of a low-frequency component to all powers a range of the low-frequency component being set according to the sound periodicity of a state to be detected; and estimation device for estimating an audience state based on said sound periodicity. - View Dependent Claims (7, 8, 9, 10, 11)
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12. An audience state estimation system comprising:
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sound-obtaining device for obtaining sound from an audience and generating an audio signal according to the sound thus obtained; spectrum detection device for performing Fourier transform on said audio signal and detecting a center of gravity of the Fourier transformed result, wherein the spectrum detection device calculates the center of gravity for a time length as an average obtained by weighting power to frequency, the time length being set to include a frequency component corresponding to an audience state to be detected; and estimation device for estimating an audience state based on said center of gravity. - View Dependent Claims (13, 14)
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15. An audience state estimation system comprising:
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sound-obtaining device for obtaining sound from an audience and generating an audio signal according to the sound thus obtained; component ratio detection device for performing Fourier transform on said audio signal and detecting a high-frequency to low-frequency component ratio by calculating said ratio based on the Fourier transformed result, wherein component ratio detection device sets a predetermined section according to an audience state to be estimated, and divides power for the predetermined section into a high-frequency component and a low-frequency component, and calculates the high-frequency to low-frequency component ratio; and estimation device for estimating an audience state based on said high-frequency to low-frequency component ratio. - View Dependent Claims (16, 17)
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18. An audience state estimation method comprising:
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obtaining sound from an audience and generating an audio signal according to the sound thus obtained, utilizing a sound-obtaining device; detecting a volume of the sound from said audience based on said audio signal and calculating variance of volume of said audio signal for each frame, and averaging the calculated variance of the volume in time direction to calculate a time macro volume, the number of frames averaged in calculating the time macro volume being set according to an audience state to be estimated, utilizing a volume detection device; and estimating an audience state based on said volume, utilizing an estimation device. - View Dependent Claims (19, 20, 21, 22)
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23. An audience state estimation method comprising:
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obtaining sound from an audience and generating an audio signal according to the sound thus obtained, utilizing a sound-obtaining device; detecting sound periodicity from said audience based on said audio signal and calculating a ratio of a power of a low-frequency component to all powers, a range of the low-frequency component being set according to the sound periodicity of a state to be detected; and estimating an audience state based on said sound periodicity, utilizing estimation device. - View Dependent Claims (24, 25, 26, 27)
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28. An audience state estimation method comprising:
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obtaining sound from an audience and generating an audio signal according to the sound thus obtained, utilizing a sound-obtaining device; performing Fourier transform on said audio signal and detecting a center of gravity of the Fourier transformed result, utilizing a spectrum detection device, wherein the center of gravity is calculated for a time length as an average obtained by weighting power to frequency, the time length being set to include a frequency component corresponding to an audience state to be detected; and estimating an audience state based on said center of gravity, utilizing estimation device. - View Dependent Claims (29, 30)
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31. An audience state estimation method comprising:
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obtaining sound from an audience and generating an audio signal according to the sound thus obtained, utilizing a sound-obtaining device; performing Fourier transform on said audio signal, setting a predetermined section according to an audience state to be estimated, and dividing power for the predetermined section into a high-frequency component and a low-frequency component, and calculating the high-frequency to low-frequency component ratio based on the Fourier transformed result, utilizing a component ratio detection device; and estimating an audience state based on said high-frequency to low-frequency component ratio, utilizing estimation device. - View Dependent Claims (32, 33)
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Specification