Patent · US Active

Automatic equalization using adaptive frequency-domain filtering and dynamic fast convolution

US9084049B2 · kind B2 · utility

26Cited by

9References

20Claims

0Family size

Assignee

Dolby Laboratories Licensing Corporation · US

Inventors

Louis D. Fielder · Millbrae, US
David S. McGrath · Sydney, AU

Key dates

Filing date	Sep 13, 2011
Grant date	Jul 14, 2015
Priority date	—
Expiry date	Jun 10, 2032

Classification

Technology area (CPC H)Electricity
CPC primaryH04L25/03286
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

Frequency-domain techniques are used for adaptive equalization that is responsive to spectral magnitude characteristics but not sensitive to phase characteristics of system response. Signal correlation may be used to improve adaptation accuracy when significant levels of ambient sounds are present. A preferred filter implementation uses convolution-based block transforms and cross-fade windows.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.