Multi-mode bitstream transmission protocol of encoded voice signals with embeded characteristics
US6961698B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 21, 2003 |
| Grant date | Nov 1, 2005 |
| Priority date | — |
| Expiry date | Aug 31, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/24
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A speech compression system capable of encoding a speech signal into a bitstream for subsequent decoding to generate synthesized speech is disclosed. The bitstream comprises a type component and a gain component. The type component is representative of a type classification of a frame of speech signal that is transmitted. The type component comprises a first type and second type. The gain component represents an adaptive codebook gain and a fixed codebook gain component comprises a fixed codebook gain component and an adaptive codebook gain component exclusively encoded as separate components of the bitstream as a function of the bit rate when the type classification is the second type.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.