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. 14, 2003
Filed:
May. 15, 1998
Kabushiki Kaisha Kawai Gakki Seisakusho, Shizuoka-Ken, JP;
Abstract
A stereophonic sound image enhancement apparatus comprises a first filter for changing a phase of a left channel input signal in response to a frequency of the left channel input signal; a second filter for changing a phase of a right channel input signal in response to a frequency of the right channel input signal; a first calculating means for calculating a difference between the left channel input signal and the phase-changed signal derived from the second filter to thereby output the difference signal as a left channel output signal; and a second calculating means for calculating a difference between the right channel input signal and the phase-changed signal derived from the first filter to thereby output.the difference signal as a right channel output signal.
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