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:
Jun. 27, 2006
Filed:
Sep. 11, 2003
Naoya Tanaka, Osaka, JP;
Osamu Shimada, Tokyo, JP;
Mineo Tsushima, Osaka, JP;
Takeshi Norimatsu, Hyogo, JP;
Kok Seng Chong, Singapore, SG;
Kim Hann Kuah, Singapore, SG;
Sua Hong Neo, Singapore, SG;
Toshiyuki Nomura, Tokyo, JP;
Yuichiro Takamizawa, Tokyo, JP;
Masahiro Serizawa, Tokyo, JP;
Naoya Tanaka, Osaka, JP;
Osamu Shimada, Tokyo, JP;
Mineo Tsushima, Osaka, JP;
Takeshi Norimatsu, Hyogo, JP;
Kok Seng Chong, Singapore, SG;
Kim Hann Kuah, Singapore, SG;
Sua Hong Neo, Singapore, SG;
Toshiyuki Nomura, Tokyo, JP;
Yuichiro Takamizawa, Tokyo, JP;
Masahiro Serizawa, Tokyo, JP;
Matsushita Elecric Industrial Co., Ltd., Osaka, JP;
NEC Corporation, Tokyo, JP;
Abstract
An audio decoding apparatus decodes high frequency component signals using a band expander that generates multiple high frequency subband signals from low frequency subband signals divided into multiple subbands and transmitted high frequency encoded information. The apparatus is provided with an aliasing detector and an aliasing remover. The aliasing detector detects the degree of occurrence of aliasing components in the multiple high frequency subband signals generated by the band expander. The aliasing remover suppresses aliasing components in the high frequency subband signals by adjusting the gain used to generate the high frequency subband signals. Thus occurrence of aliasing can be suppressed and the resulting degradation in sound quality can be reduced, even when real-valued subband signals are used in order to reduce the number of operations.