Efficient encoding/decoding of audio signals
US9280980B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 9, 2011 |
| Grant date | Mar 8, 2016 |
| Priority date | — |
| Expiry date | Aug 18, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L2019/0008
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for encoding of an audio signal comprises performing (214) of a transform of the audio signal. An energy offset is selected (216) for each of the first subbands. An energy measure of a first reference band within a low band of an encoding of a synthesis signal is obtained (212). The first high band is encoded (220) by providing quantization indices representing a respective scalar quantization of a spectrum envelope in the first subbands of the first high band relative to the energy measure of the first reference band by use of the selected energy offset. An encoder apparatus comprises means for carrying out the steps of the method. Corresponding decoder methods and apparatuses are also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.