Audio coding method and apparatus
US9741349B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 13, 2015 |
| Grant date | Aug 22, 2017 |
| Priority date | — |
| Expiry date | Aug 28, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2012/5632
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An audio signal is coded, where a frequency spectrum of the audio signal is divided into first and second regions. Spectral peaks in the first region are encoded by a first coding method. For a segment of the audio signal, a relation between an energy of a band in the second region and an energy estimate of the first region 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. Further, when the relations fulfill a respective criterion and the bits are sufficient, the band in the second region and the at least one segment of the first region are encoded using a second coding method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.