Apparatus for analyzing musical performance, performance analysis method, automatic playback method, and automatic player system
First Claim
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1. An apparatus for analyzing performance of a piece of music, the apparatus comprising:
- a controller that is configured todetect a cue gesture of a performer who plays the piece of music;
calculate a distribution of likelihood of observation by analyzing an audio signal representative of a sound of the piece of music being played, wherein the likelihood of observation is an index showing a correspondence probability of a time point within the piece of music to a playback position; and
estimate the playback position depending on the distribution of the likelihood of observation, whereincalculating the distribution of the likelihood of observation includes decreasing the likelihood of observation during a period prior to a reference point specified on a time axis for the piece of music in a case where the cue gesture is detected.
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Abstract
An apparatus for analyzing musical performance includes a controller. The controller is configured to detect a cue gesture of a performer who plays a piece of music. The controller is also configured to calculate a distribution of likelihood of observation and estimate the playback position depending on the distribution of the likelihood of observation. The calculating of the distribution of the likelihood of observation includes decreasing the likelihood of observation during a period prior to a reference point specified on a time axis for the piece of music in a case where the cue gesture is detected.
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Citations
9 Claims
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1. An apparatus for analyzing performance of a piece of music, the apparatus comprising:
a controller that is configured to detect a cue gesture of a performer who plays the piece of music; calculate a distribution of likelihood of observation by analyzing an audio signal representative of a sound of the piece of music being played, wherein the likelihood of observation is an index showing a correspondence probability of a time point within the piece of music to a playback position; and estimate the playback position depending on the distribution of the likelihood of observation, wherein calculating the distribution of the likelihood of observation includes decreasing the likelihood of observation during a period prior to a reference point specified on a time axis for the piece of music in a case where the cue gesture is detected.
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2. A computer-implemented performance analysis method, comprising:
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detecting a cue gesture of a performer who plays a piece of music; calculating a distribution of likelihood of observation by analyzing an audio signal representative of a sound of the piece of music being played, wherein the likelihood of observation is an index showing a correspondence probability of a time point within the piece of music to a playback position; and estimating the playback position depending on the distribution of the likelihood of observation, wherein calculating the distribution of the likelihood of observation includes decreasing the likelihood of observation during a period prior to a reference point specified on a time axis for the piece of music in a case where the cue gesture is detected. - View Dependent Claims (3, 4)
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5. A computer-implemented automatic playback method, comprising:
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detecting a cue gesture of a performer who plays a piece of music, estimating playback positions in the piece of music by analyzing an audio signal representative of a sound of the piece of music being played; and causing an automatic player apparatus to execute automatic playback of the piece of music synchronous with the detected cue gesture and with progression of the playback positions, wherein estimating each playback position includes; calculating a distribution of likelihood of observation by analyzing the audio signal, wherein the likelihood of observation is an index showing a correspondence probability of a time point within the piece of music to a playback position; and estimating the playback position depending on the distribution of the likelihood of observation, and wherein calculating the distribution of the likelihood of observation includes decreasing the likelihood of observation during a period prior to a reference point specified on a time axis for the piece of music in a case where the cue gesture is detected. - View Dependent Claims (6, 7, 8)
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9. An automatic player system comprising:
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at least one processor configured to execute stored instructions to; detect a cue gesture of a performer who plays a piece of music; estimate playback positions in the piece of music by analyzing an audio signal representative of a sound of the piece of music being played; and cause an automatic player apparatus to execute automatic playback of the piece of music synchronous with the detected cue gesture and with progression of the estimated playback positions, wherein in estimating the playback positions, the at least one processor is configured to; calculate a distribution of likelihood of observation by analyzing the audio signal, wherein the likelihood of observation is an index showing a correspondence probability of a time point within the piece of music to a playback position; and estimate the playback position depending on the distribution of the likelihood of observation, and wherein in calculating the distribution of likelihood of observation, the at least one processor is configured to decrease the likelihood of observation during a period prior to a reference point specified on a time axis for the piece of music in a case where the cue gesture is detected.
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Specification