Information processing apparatus, sound material capturing method, and program
AssigneeSony Corporation
InventorYoshiyuki Kobayashi
Life of this patent
Estimating the term…
Abstract
An information processing apparatus is provided which includes a music analysis unit for analyzing an audio signal serving as a capture source for a sound material and for detecting beat positions of the audio signal and a presence probability of each instrument sound in the audio signal, and a capture range determination unit for determining a capture range for the sound material by using the beat positions and the presence probability of each instrument sound detected by the music analysis unit.
Claims11
An information processing apparatus comprising:
- a music analysis unit for analyzing an audio signal serving as a capture source for a sound material and for detecting beat positions of the audio signal and a presence probability of each instrument sound in the audio signal;
- a capture range determination unit for determining a capture range for the sound material by using the beat positions and the presence probability of each instrument sound detected by the music analysis unit;
- and
- a sound source separation unit that separates, a signal for foreground sound, a signal for background sound, and a center signal to compute the presence probability of each instrument sound, wherein the sound source separation unit comprises:
- a left-channel band division unit for converting a left-channel signal to a frequency domain;
- a right-channel band division unit for converting a right-channel signal into the frequency domain;
- a left-channel band synthesis unit for extracting a first center signal portion;
- and
- a right-channel band synthesis unit for extracting a second center signal portion.
An information processing apparatus comprising:
- a music analysis unit for analyzing an audio signal serving as a capture source for a sound material and for detecting beat positions of the audio signal and a presence probability of each instrument sound in the audio signal;
- a capture range determination unit for determining a capture range for the sound material by using the beat positions and the presence probability of each instrument sound detected by the music analysis unit;
- and
- a capture request input unit for inputting a capture requesting including, as information, at least one of a length of a range to be captured as the sound material, types of instrument sounds and strictness for capturing, wherein the capture range determination unit determines the capture range for the sound material so that the sound material meets the capture request input by the capture request input unit.
A sound material capturing method comprising, when an audio signal serving as a capture source for a sound material is input to an information processing apparatus, the steps of:
- using a computer to analyze the audio signal and to detect beat positions of the audio signal and a presence probability of each instrument sound in the audio signal;
- using a computer to determine a capture range for the sound material by using the beat positions and the presence probability of each instrument sound detected by the step of analyzing and detecting;
- and
- using a computer to separate, from the audio signal, a signal for foreground sound and a signal for background sound to compute the presence probability of each instrument sound, wherein separating the audio signal comprises:
- converting a left-channel signal to a frequency domain;
- converting a right-channel signal into the frequency domain;
- extracting a first center signal portion;
- and
- extracting a second center signal portion.
A computer program product tangibly embodied as instructions on a non-transitory computer-readable storage medium, the computer program causing a computer to realize:
- when an audio signal serving as a capture source for a sound material is input,
- a music analysis function for analyzing the audio signal and for detecting beat positions of the audio signal and a presence probability of each instrument sound in the audio signal;
- a capture range determination function for determining a capture range for the sound material by using the beat positions and the presence probability of each instrument sound detected by the music analysis function;
- and
- a sound source separation unit for separating a signal for foreground sound, a signal for background sound, and a center signal to compute the presence probability of each instrument sound, wherein the sound source separation unit comprises:
- a left-channel band division unit for converting a left-channel signal to a frequency domain;
- a right-channel band division unit for converting a right-channel signal into the frequency domain;
- a left-channel band synthesis unit for extracting a first center signal portion;
- and
- a right-channel band synthesis unit for extracting a second center signal portion.
Dependencies are inferred from the claim text.