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:
May. 31, 2011
Filed:
Oct. 15, 2007
Yasuyuki Suzuki, Hiratsuka, JP;
Shinichi Nakamura, Sagamihara, JP;
Hiroshi Satoh, Isehara, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A digital filter device that filters a digital sound signal input to an input terminal and outputs an output digital signal from an output terminal, has a peak value controlling circuit compares a first gain multiplier value and a second gain multiplier value with each other, and replaces a filter coefficients stored in a first coefficient register with a new filter coefficients stored in a second coefficient register at a timing when the gain multiplier value applied to a gain multiplier becomes zero or becomes closest to zero for the first time during shifting the gain multiplier value from a first gain multiplier value to a second gain multiplier value if said first gain multiplier value and said second gain multiplier value are different in sign.