Apparatus and method for concealing frame erasure and voice decoding apparatus and method using the same
US8498861B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 22, 2012 |
| Grant date | Jul 30, 2013 |
| Priority date | — |
| Expiry date | May 22, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L2019/0016
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An apparatus and method for concealing frame erasure and a voice decoding apparatus and method using the same. The frame erasure concealment apparatus includes: a parameter extraction unit determining whether there is an erased frame in a voice packet, and extracting an excitement signal parameter and a line spectrum pair parameter of a previous good frame; and an erasure frame concealment unit, if there is an erased frame, restoring the excitement signal and line spectrum pair parameter of the erased frame by using a regression analysis from the excitement signal and line spectrum pair parameter of the previous good frame. According to the method and apparatus, by predicting and restoring the parameter of the erased frame through the regression analysis, the quality of the restored voice signal can be enhanced and the algorithm can be simplified.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.