Reduction of speech quality degradation caused by packet loss
US7272554B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 18, 2003 |
| Grant date | Sep 18, 2007 |
| Priority date | — |
| Expiry date | Sep 19, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/005
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A speech decoding device is provided is capable of reducing degradation of speech quality caused by concealment processing performed when a loss of a packet has occurred, e.g., in speech packet communications using a VoIP (Voice over Internet Protocol) or the like. A decoding circuit decodes speech from a packet received through an input terminal and stores an internal signal in an updating buffer circuit, the internal signal produced in the decoding process and to be used in a decoding process for a subsequent packet to be subsequently received. The decoding circuit produces, based on the internal signal stored in the updating buffer circuit, concealed speech corresponding to a packet having not been received, and outputs the produced concealed speech. The internal signal is updated using the concealed speech.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.