Name
Abstract | ||
|---|---|---|
Directional Audio Coding (DirAC) represents an efficient scheme to analyze and reproduce spatial sound; the coded stream consists of a single-channel audio signal and few parameters. Estimation of these parameters ideally relies on figure-of-eight microphones and one omnidirectional microphone. The figure-of-eight directivity can be efficiently approximated by first-order differential microphone arrays. However, due to spatial sampling, there are considerable deviations from the required directivity at high frequencies. These deviations lead to incorrect spatial parameter estimates; especially, the instantaneous direction-of-arrival (DOA) becomes biased and - beyond a certain aliasing frequency - ambiguous. Parameters like the DOA drive subsequent processing units, e. g., for spatial filtering. In this paper we propose a novel strategy to compensate bias and ambiguity not directly w. r. t. the DOA but the output parameters of a spatial filtering processing unit. Simulation results confirm the benefits of the novel method, which does not involve additional computational load at run-time. |
Year | DOI | Venue |
|---|---|---|
2011 | 10.1109/ICASSP.2011.5946346 | 2011 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING |
Keywords | Field | DocType |
Spatial filters, beamforming, spatial audio coding, spatial aliasing | Audio signal,Computer science,Artificial intelligence,Spatial filter,Beamforming,Directivity,Pattern recognition,Algorithm,Speech recognition,Parametric statistics,Aliasing,Time–frequency analysis,Microphone | Conference |
ISSN | Citations | PageRank |
1520-6149 | 0 | 0.34 |
References | Authors | |
1 | 5 | |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Markus Kallinger | 1 | 85 | 7.49 |
| Michael Buerger | 2 | 0 | 0.34 |
| Oliver Thiergart | 3 | 96 | 9.67 |
| Fabian Kuech | 4 | 83 | 7.51 |
| Dirk Mahne | 5 | 0 | 0.34 |