Sound source separation system, sound source separation method, and computer program for sound source separation
US8239052B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 14, 2008 |
| Grant date | Aug 7, 2012 |
| Priority date | — |
| Expiry date | Jun 18, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10H2250/031
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An audio signal produced by playing a plurality of musical instruments is separated into sound sources according to respective instrument sounds. Each time a separation process is performed, the updated model parameter estimation/storage section 114 estimates parameters respectively contained in updated model parameters such that updated power spectrograms gradually change from a state close to initial power spectrograms to a state close to a plurality of power spectrograms most recently stored in a power spectrogram separation/storage section. Respective sections including the power spectrogram separation/storage section 112 and an updated distribution function computation/storage section 118 repeatedly perform process operations until the updated power spectrograms change from the state close to the initial power spectrograms to the state close to the plurality of power spectrograms most recently stored in the power spectrogram separation/storage section 112. The final updated power spectrograms are close to the power spectrograms of single tones of one musical instrument contained in the input audio signal formed to contain harmonic and inharmonic models.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.