Systems and methods for encoding audio signals
US9564140B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 7, 2015 |
| Grant date | Feb 7, 2017 |
| Priority date | — |
| Expiry date | Jul 9, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/038
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Some embodiments relate to techniques for encoding an audio signal represented by a plurality of frames including a first frame. The techniques include using at least one computer hardware processor to perform: obtaining an initial discrete spectral representation of the first frame; obtaining a primary discrete spectral representation of the initial discrete spectral representation at least in part by estimating a phase envelope of the initial discrete spectral representation and evaluating the estimated phase envelope at a discrete set of frequencies; calculating a residual discrete spectral representation of the initial discrete spectral representation based on the initial discrete spectral representation and the primary discrete spectral representation; and encoding the residual discrete spectral representation using a plurality of codewords.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.