Multiresolution STFT Phase Estimation with Frame-Wise Posterior Window Length Decision
Presented at the 14. International Conference on Digital Audio Effects DAFX'11, September 19-23, 2011, Paris, France.
Conference homepage
Abstract
This paper presents an extension to the dual-win\-dow-length
Real-Time Iterative Spectrogram Inversion phase estimation algorithm
(RTISI). Instead of a transient detection in advance, the phase
estimator itself determines the correct window length when the phase
information for all window lengths have already been estimated. This
way, we get significant improvements compared with the previous
method. Additionally, we extend this estimator to configurations
with three or more window lengths.
Paper
PDF
Slides
PDF (4 MB)
Note that the sound examples in the slides are deactivated.
Sound Examples
Source: Eminem "Cleanin' Out My Closet" (beginning). See also
this page from N. Juillerat et al. for an other multiresolution STFT approach and the same example. All sound examples are stored in the FLAC format (Free Lossless Audio Coding).
Details and decoding software can be found here.
| Original |
Multiresolution Phase Estimation |
|
512/4096 Dual Resolution |
512/.../4096 Quad-Res |
|
Trans.Detect. |
Posterior Minimax |
| FLAC |
FLAC |
FLAC |
FLAC |
