Extraction of left/center/right information from two-channel stereo sources
US7542815B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 1, 2004 |
| Grant date | Jun 2, 2009 |
| Priority date | — |
| Expiry date | Apr 18, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04S5/005
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A digital audio signal processing system and method transforms two-channel stereo time-domain data into the frequency domain. Vector operations are performed upon the frequency-domain data by which signal components unique to one of the input channels are routed to one of the output channels, signal components unique to the other of the input channels are routed to another of the output channels, and signal components common to both channels are routed to a third and optionally to a fourth output channel. The frequency-domain output channels are then transformed back into the time-domain, forming an equivalent number of channels of output audio data. The vector operations are performed in a manner that preserves the overall information content of the input data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.