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:
Jan. 13, 2015
Filed:
Apr. 03, 2009
Ronaldus Maria Aarts, Eindhoven, NL;
Thomas Pieter Jan Peeters, Mariakerke, BE;
Ronaldus Maria Aarts, Eindhoven, NL;
Thomas Pieter Jan Peeters, Mariakerke, BE;
Koninklijke Philips N.V., Eindhoven, NL;
Abstract
An apparatus for generating a drive signal for a sound transducer () comprises a sound generator () which provides an input audio signal. A divider () divides the input audio signal into at least a low frequency signal and a high frequency signal and an expander () generates an expanded signal by applying a dynamic range expansion to the low frequency signal. A combiner () then generates the drive signal by combining the expanded signal and the higher frequency signal. The threshold for applying the dynamic range extension may be adjusted depending on the amplitude of the low frequency signal. The low frequency signal may furthermore be compressed into a narrow frequency band around a resonance frequency. The approach may allow improved audio quality especially from high Q low frequency sound transducers by attenuating decay parts of bass signals thereby reducing sustain or ringing for bass notes.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile