Methods and apparatus for encoding/decoding speech signals at low bit rates
US5717819A · kind A · utility
8Cited by
7References
25Claims
0Family size
Assignee
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Key dates
| Filing date | Apr 28, 1995 |
| Grant date | Feb 10, 1998 |
| Priority date | — |
| Expiry date | Apr 28, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/06
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A voice encoder for use in low bit rate vocoding applications employs a method of encoding a plurality of digital information frames. This method includes the step of providing an estimate of the digital information frame, which estimate includes a frame shape characteristic. Further, a fundamental frequency associated with the digital information frame is identified and used to establish a shape window. Lastly, the frame shape characteristic is matched, within the shape window, with a predetermined shape function to produce a plurality of shape parameters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.