Decoding device, encoding device, decoding method, and encoding method
US10062389B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 14, 2016 |
| Grant date | Aug 28, 2018 |
| Priority date | — |
| Expiry date | Jun 14, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/26
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A decoding device includes: a separating unit separating first encoded data, a spectrum including a low-band spectrum of audio signals having been encoded, and second encoded data, a high-band spectrum of a higher band having been encoded, based on the first encoded data; a first decoding unit decoding the first encoded data and generating a first decoded spectrum; a first amplitude normalizer dividing amplitude of the first decoded spectrum into sub-bands, normalizing the spectrum of each sub-band by the largest amplitude of the first decoded spectrum within each sub-band, and generating a normalized spectrum; an addition unit adding noise spectrum to the normalized spectrum and generating a noise-added normalized spectrum; a second decoding unit decoding the second encoded data using the noise-added normalized spectrum, and generating a second noise-added spectrum; and a converter performing time-frequency conversion regarding a spectrum coupled based on the first decoded spectrum and second noise-added spectrum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.