| Title | Multi-Pitch Estimation of Inharmonic Signals |
| Authors | Tommy Nilsson |
| Full-text | Available as PDF |
| Year | 2013 |
| Document type | StudentPublicationsH2 |
| Language | eng |
| Abstract Swedish | A signal with harmonic structure is often characterized by its fundamental frequency,<br> or pitch. This single parameter contain vital information of a range of<br> applications such as musical transcription, tuning of stringed instruments, speech<br> processing and more. Some signal sources, for instance a sti vibrating string, exhibit<br> waveforms with slightly deviating harmonic structure. This phenomenon is<br> known as inharmonicity and it complicates the matter of estimating the fundamental<br> frequency. If several signals with this inharmonic structure are added together,<br> for instance for a musical chord from a stringed instrument, we arrive at the problem<br> formulation of this work. How does one estimate the fundamental frequency of<br> a multi-pitch signal containing inharmonicities?<br> In this work we present a multi-pitch estimator able to handle inharmonic signals.<br> This algorithm uses a source separating technique in order to apply a single<br> pitch estimator to the resulting sub-problems. The performance of the estimator is<br> evaluated and compared to other multi-pitch estimators with good results. |
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