Audio coding method and apparatus
US10147435B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 20, 2017 |
| Grant date | Dec 4, 2018 |
| Priority date | — |
| Expiry date | Jul 20, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2012/5632
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An audio signal, having first and second regions of frequency spectrum, is coded. Spectral peaks in the first region are encoded by a first coding method. For a segment of the audio signal, a relation between energy of bands in the first and second regions is determined. A relation between the energy of the band in the second region and energy of neighboring bands in the second region is determined. A determination is made whether available bits are sufficient for encoding at least one non-peak segment of the first region and the band in the second region. Responsive to first and second relations fulfilling a respective predetermined criterion and a sufficient number of bits, encoding the band in the second region using a second coding method different from the first coding method, and otherwise, subjecting the band in the second region to BandWidth Extension BWE or noise fill.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.