The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 25, 2004
Filed:
Nov. 14, 2000
Alastair Sibbald, Maidenhead, GB;
Creative Technology Ltd., , SG;
Abstract
A method of synthesizing an approximate impulse response function from a measured first impulse response function in a given sound field includes: sampling an early part of the impulse response for the given sound field; synthesizing a part impulse response which approximates to the sampled part of the given impulse response by curve fitting using a plurality of basis functions provided by respective multi-tap FIR filters, said part impulse response including scattering artefacts; synthesizing subsequent further part impulse responses using the same filters; applying an envelope function which decreases the amplitude with increasing time, and constructing an extended approximate impulse response by combining successive part impulse responses with irregular overlap to minimize audible artifacts. The synthesized impulse response function has psycho-acoustic properties similar to those of the original impulse response function, and enables fewer taps to be employed.