Digital equalizer apparatus enabling separate phase and amplitude characteristic modification
US4888808A · kind A · utility
37Cited by
2References
31Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 22, 1988 |
| Grant date | Dec 19, 1989 |
| Priority date | — |
| Expiry date | Mar 22, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G5/005
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A digital equalizer for audio system applications is based on a FIR (finite impulse response) digital filter whose amplitude and phase/frequency characteristics can be respectively independently established in accordance with input data representing an arbitrary amplitude/frequency characteristic and input phase data from which an arbitrary phase/frequency characteristic for the filter can be derived. In addition to audio frequency response equalization, the apparatus can be provided with a microphone howl suppression function.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.