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. 15, 2013
Filed:
Sep. 30, 2010
Kazuya Iwata, Osaka, JP;
Kazuya Iwata, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
Audio signal processing apparatus includes: an amplitude change extractorwhich obtains an amplitude change extraction signal which is a signal having an amplitude changing at a fixed quantization width when an amplitude of an input signal temporally changes; a first requantizerwhich extends, from a first bit count to a second bit count, a bit count representing the amplitude change extraction signal obtained; a second requantizerwhich smoothes the amplitude change extraction signal by requantizing using a second quantization width less than a first quantization width used on the input signal; a difference signal generator which obtains a difference signal which is a signal represented using the second bit count and obtained by subtracting the amplitude change extraction signal from the input signal; and an adderwhich generates an output signal by adding a second requantized signal which is the amplitude change extraction signal smoothed by the second requantizerand the difference signal obtained by the difference signal generator