Voice activity detection speech coding to accommodate music signals
US6633841B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 2000 |
| Grant date | Oct 14, 2003 |
| Priority date | — |
| Expiry date | Mar 15, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10H2210/046
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An extended signal coding system that accommodates substantially music-like signals within a signal while maintaining a high perceptual quality in a reproduced signal during discontinued transmission (DTX) operation. The extended signal coding system contains internal circuitry that performs detection and classification of the speech signal, depending on numerous characteristics of the signal, to ensure the high perceptual quality in the reproduced signal. In certain embodiments of the invention, the signal is a speech signal, and the speech signal has a substantially music-like signal contained therein, and the extended signal coding system overrides any voice activity detection (VAD) decision that is used to determine which among a plurality of source coding modes are to be employed using a voice activity detection (VAD) correction/supervision circuitry. This is particularly relevant for discontinued transmission (DTX) operation. In certain embodiments of the invention, a signal coding circuitry maintains an improved perceptual quality in a coded signal having a substantially music-like component. This assurance of an improved perceptual quality is very desirable when there is a …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.