Time multiplexed n-ordered digital filter
US4398262A · kind A · utility
13Cited by
5References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 22, 1981 |
| Grant date | Aug 9, 1983 |
| Priority date | — |
| Expiry date | Dec 22, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/06
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An n-ordered digital filter is disclosed in the form of a Partial Autocorrelation (PARCOR) lattice structure having two multipliers and two adders. Time multiplexing eliminates the use of individual multipliers and adders for each order of the filter. Speech synthesis of a time varying digital input signal is provided by performing n stages of Linear Predictive Coding (LPC) difference equation operation, where n is an integer. Delay means and storage registers minimize the control circuitry and circuit die size to calculate the difference equations to an nth order.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.