Phase-amplitude 3-D stereo encoder and decoder
US8712061B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 2008 |
| Grant date | Apr 29, 2014 |
| Priority date | — |
| Expiry date | Jul 31, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/008
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A two-channel phase-amplitude stereo encoding and decoding scheme enabling flexible and spatially accurate interactive 3-D audio reproduction via standard audio-only two-channel transmission. The encoding scheme allows associating a 2-D or 3-D positional localization to each of a plurality of sound sources by use of frequency independent inter-channel phase and amplitude differences. The decoder is based on frequency-domain spatial analysis of 2-D or 3-D directional cues in a two-channel stereo signal and re-synthesis of these cues using any preferred spatialization technique, thereby allowing faithful reproduction of positional audio cues and reverberation or ambient cues over arbitrary multi-channel loudspeaker reproduction formats or over headphones, while preserving source separation despite the intermediate encoding over only two audio channels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.