Scalable subband audio coding, decoding, and transcoding methods using vector quantization
US6606600B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 17, 2000 |
| Grant date | Aug 12, 2003 |
| Priority date | — |
| Expiry date | Mar 17, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/0208
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Using a group of spectral components from an audio signal, a coder produces a digital data stream (&PHgr;) including the quantification indices (QE0m) of at least some of the spectral components (E0m). The coder, or a transcoder situated downstream, selects at least one pair of components exhibiting a maximum correlation out of the group of spectral components, and includes in its digital output data stream identification information for each pair selected. At least some of the quantification indices are included in the output data stream for only one of the components for each pair selected. The decoder will use these to obtain the suppressed indices for the other component of the pair.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.