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:
Aug. 03, 2004
Filed:
Sep. 28, 2001
Ole Kirkeby, Espoo, FI;
Nokia Mobile Phonés Ltd., Espoo, FI;
Abstract
The invention relates to a method for converting signals in two-channel stereo format to become suitable to be played back using headphones. The invention also relates to a signal processing device for carrying out said method. According to the invention left direct path (L ) and left cross-talk path (L ) signals are formed from the left input signal (L ), and correspondingly right direct path (R ) and right cross-talk path (R ) signals are formed from the right input signal (R ), and further the left output signal (L ) is formed by combining said left direct-path (L ) and said right cross-talk path (R ) signals, and correspondingly, the right output signal (R ) is formed by combining said right direct-path (R ) and said left cross-talk path (L ) signals. The direct path signals (L ,R ) each are formed using filtering ( ) associated with first frequency dependent gain (G ) and the cross-talk path signals (L ,R ) each are formed using filtering ( ) associated with second frequency dependent gain (G ) and by adding interaural time difference (ITD) ( ).