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:
Oct. 30, 2012
Filed:
Dec. 25, 2007
Yasushi Sato, Fukuoka, JP;
Atsuko Ryu, Fukuoka, JP;
Yasushi Sato, Fukuoka, JP;
Atsuko Ryu, Fukuoka, JP;
Kyushu Institute of Technology, Fukuoka, JP;
Abstract
A favorable high-frequency signal is generated and practical high-frequency signal interpolation is implemented through simple processing. A digital audio signal reproduced by an instrument, which also carries out compression, is supplied as an original signal to an input terminal, and this original signal is then supplied to a digital sample and hold circuitvia a band-pass filter. The signal from the digital sample and hold circuitis supplied to a ±1 multiplier, which then alternately inverts sign bits. The harmonic components of this signal in which the sign bits are inverted alternately are extracted by a high-pass filter (HPF). Meanwhile, the original signal from the input terminalis supplied to a delay circuitequivalent to the processing time consumed by the aforementioned digital sample and hold circuitand related circuits, forming an adjusted, delayed signal. The signals from the high-pass filter (HPF)and the delay circuitare then added by an adder, and the resulting added signal is then output to an output terminal
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile