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. 19, 2010
Filed:
Sep. 10, 2002
Kazuhiro Kawana, Kashiwa, JP;
Toshio Saito, Urayasu, JP;
Hareo Hamada, Musashino, JP;
Noriyuki Hanawa, Foster City, CA (US);
Kazuhiro Kawana, Kashiwa, JP;
Toshio Saito, Urayasu, JP;
Hareo Hamada, Musashino, JP;
Noriyuki Hanawa, Foster City, CA (US);
Dimagic Co., Ltd., Tokyo, JP;
Abstract
The input signal X of one channel is divided by a multi-stage delay processing device Zand each of the outputs is superimposed by a specified coefficient by a coefficient processing device W, W, . . . , W. The results are added by an adder, thereby providing a correlation eliminating filter for extracting a signal component from the input signal X of one channel having a high correlation with the input signal Y of the other channel. There is provided a coefficient updating processing devicefor successively changing the feature of the correlation eliminating filter according to an error signal e obtained from the output signal RES and the input signal Y from the other channel, and the input signal X of one channel. A surround signal is obtained from a difference between the output RES from the correlation eliminating filter and the input signal Y of the other channel. Thus, upon reproduction of a two channels stereo signal, it is possible to generate a surround signal not giving uncomfortable feeling to a listener.