Multipass parametric or graphic EQ fitting
US7664276B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 15, 2005 |
| Grant date | Feb 16, 2010 |
| Priority date | — |
| Expiry date | Nov 26, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R29/001
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Multiple passes are executed in the setup of an equalizer, and modification of the equalization is performed after each pass of an analysis phase. After an initial pass, the equalization is adjusted, based upon the location of peaks and valleys in the system response. This initial adjustment of equalization may tend to flatten most of the peaks and valleys to produce the desired uniform linear response. Inexact application of equalization corrections may introduce other artifacts into the system response and/or may not sufficiently normalize equalization. A second pass is then performed to measure the system response using the new equalization settings. The new peaks and valleys are measured, and the equalization adjusted to try to flatten response further. A proximity range may be applied to each pass, to reduce the likelihood that adjustment of one equalizer coefficient will create artifacts in the resulting system response.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.