Speech coding apparatus and speech decoding apparatus
US6061648A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 26, 1998 |
| Grant date | May 9, 2000 |
| Priority date | — |
| Expiry date | Feb 26, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L21/0264
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a speech coding apparatus, an input device inputs a mixed speech signal of a plurality of speakers. A separating device analyzes period characteristics of the input mixed speech signal, and separates the same signal into a plurality of single speech signals each associated with a corresponding one of the speakers, based on a result of the analysis. A first extracting device extracts source speech characteristic parameters included in each of the single speech signals. A second extracting device extracts a generic vocal-tract characteristic parameter from the input mixed speech signal. In a speech decoding apparatus, a first input device inputs the source speech characteristic parameters for each of the speakers. A second input device inputs the vocal-tract characteristic parameter. A source speech decoder decodes source speech signals of the respective speakers, based on the source speech characteristic parameters for the speakers and forms a source speech signal for the speakers by synthesizing the decoded source speech signals of the respective speakers. A vocal-tract filter filters the source speech signal for the speakers, based on the generic vocal-tract characteristic para…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.