| Autor: |
Kari Roth, Vesa Välimäki, Paulo A. A. Esquef, Ismo Kauppinen |
| Rok vydání: |
2004 |
| Předmět: |
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| Zdroj: |
Aalto University |
| DOI: |
10.1109/aspaa.2003.1285795 |
| Popis: |
Auto-regressive modeling of measured data is commonly used in numerous signal processing applications. When aiming for high accuracy, Burg's method has been found to give a suitable model. It has been shown that when the signal energy is non-uniformly distributed in a frequency range, the use of a modified frequency scale is advantageous. This is often the case with audio signals. We introduce a frequency warped version of Burg's method for calculating the auto-regressive filter parameters. A bilinear frequency mapping can be embedded in Burg's method by replacing the unit-delays of the lattice structure used in Burg's method with first-order allpass filters. The benefits of the frequency-warped Burg's method are demonstrated by comparing its signal modeling performance against those of the conventional Burg's method and the warped Yule-Walker method. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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