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:
Mar. 26, 2002
Filed:
Jan. 26, 1999
Applicant:
Inventors:
Koji Takano, Ogaki, JP;
Fumiaki Nagao, Gifu, JP;
Assignee:
Sanyo Electric Co., Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 1/710 ;
U.S. Cl.
CPC ...
G06F 1/710 ;
Abstract
The processing of a digital filter ( ) switches between the separation of audio data and the synthesis of a plurality of band data. An attenuator ( ), one end of which is connected to the digital filter ( ) and the other end is connected to the audio data input-output port, attenuates the input audio data and supplies it to the digital filter and attenuates and outputs the audio data that has been output from the digital filter ( ). The attenuator ( ) and the digital filter ( ) are commonly used for both data compression and data expansion processing and therefore the entire circuit size of an audio data compression/expansion apparatus is reduced.