Binaural spatialization of compression-encoded sound data utilizing phase shift and delay applied to each subband
US8880413B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 2007 |
| Grant date | Nov 4, 2014 |
| Priority date | — |
| Expiry date | Nov 8, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04S2420/05
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention is aimed at improving the quality of the filtering by transfer functions of HRTF type of signals (L, R) compressed in a transformed domain, for binaural playing on two channels (L-BIN, R-BIN), using a combination of HRTF filters (hL,L, hL,R) including a decorrelated version (HRTF-C*, HRTF-E*) of a few of these filters. For this purpose, a decorrelation cue is given with spatialization parameters (SPAT) accompanying the compressed signals (L, R). The Decorrelation comprises applying a different phase shift to each subband of the input signal combined with addition of an overall delay. The invention makes it possible to improve the broadening in the binaural rendition of audio scenes initially in a multi-channel format.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.