Digital speech processor using arbitrary excitation coding
US4827517A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 26, 1985 |
| Grant date | May 2, 1989 |
| Priority date | — |
| Expiry date | Dec 26, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L2019/0014
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An arrangement for processing a speech message which uses arbitrary value codes to form time frame excitation signals. The arbitrary value codes, e.g., random numbers, are stored as well as signals indexing the codes and transform domain signals corresponding to the arbitrary codes are generated. The speech message is partitioned into time frame interval speech patterns and a first signal representative of the transform domain speech pattern of each successive time frame interval is formed responsive to the partitioned speech message. A plurality of second signals representative of time frame interval patterns corresponding to the transform code signals are generated responsive to said set of transform signals. One of the arbitrary code signals is selected jointly responsive to the first and second signals of each successive time interval to represent the time frame speech signal excitation, and the index signal corresponding to said selected arbitrary code signal is output. A replica of the speech message is formed from the arbitrary codes by concatenating a sequence of said arbitrary codes identified by the output index signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.