Information processing apparatus, sound analysis method, and program
AssigneeSony Corporation
InventorYoshiyuki Kobayashi
Life of this patent
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Abstract
An information processing apparatus is provided which includes a beat analysis unit for detecting positions of beats included in an audio signal, a structure analysis unit for calculating similarity probabilities, each being a probability of similarity between contents of sound of beat sections divided by each beat position detected by the beat analysis unit, and a bar detection unit for determining a likely bar progression of the audio signal based on bar probabilities determined according to the similarity probabilities calculated by the structure analysis unit, the bar probabilities indicating to which ordinal in which meter respective beats correspond.
Claims18
An information processing apparatus comprising:
- a beat analysis unit for detecting positions of beats included in an audio signal;
- a structure analysis unit for calculating similarity probabilities, each being a probability of similarity between contents of sound of beat sections divided by each beat position detected by the beat analysis unit;
- and
- a bar detection unit for determining a likely bar progression of the audio signal based on bar probabilities determined according to the similarity probabilities calculated by the structure analysis unit, the bar probabilities indicating to which ordinal in which meter respective beats correspond.
A sound analysis method comprising the steps of:
- detecting positions of beats included in an audio signal;
- calculating similarity probabilities, each being a probability of similarity between contents of sound of beat sections divided by each detected beat position;
- and
- determining a likely bar progression of the audio signal based on bar probabilities determined according to the calculated similarity probabilities and indicating to which ordinal in which meter respective beats correspond.
A program for causing a computer controlling an information processing apparatus to function as:
- a beat analysis unit for detecting positions of beats included in an audio signal;
- a structure analysis unit for calculating similarity probabilities, each being a probability of similarity between contents of sound of beat sections divided by each beat position detected by the beat analysis unit;
- and
- a bar detection unit for determining a likely bar progression of the audio signal based on bar probabilities determined according to the similarity probabilities calculated by the structure analysis unit, the bar probabilities indicating to which ordinal in which meter respective beats correspond.
Dependencies are inferred from the claim text.