Decoding method, decoding apparatus, program, and recording medium therefor
US9640190B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 28, 2013 |
| Grant date | May 2, 2017 |
| Priority date | — |
| Expiry date | Aug 28, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/02
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a speech coding scheme based on a speech production model, such as a CELP-based scheme, an object of the present invention is to provide a decoding method that can reproduce natural sound even if the input signal is a noise-superimposed speech. The decoding method includes a speech decoding step of obtaining a decoded speech signal from an input code, a noise generating step of generating a noise signal that is a random signal, and a noise adding step of outputting a noise-added signal, the noise-added signal being obtained by summing the decoded speech signal and a signal obtained by performing, on the noise signal, a signal processing that is based on at least one of a power corresponding to a decoded speech signal for a previous frame and a spectrum envelope corresponding to the decoded speech signal for the current frame.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.