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:
Aug. 05, 1997
Filed:
Oct. 25, 1995
Hiroshi Suzuki, Saitama, JP;
Kuniaki Takahashi, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
A digital signal compressing device includes a unit for dividing an input signal into plural bands duping information compression, a unit for producing frequency-domain data of the input signal divided into plural bands, and a unit for operating on frequency-domain characteristics. The unit for operating on frequency-domain characteristics operates on the frequency-domain characteristics so that the condition of canceling the aliasing noise by the frequency division and subsequent frequency synthesis performed by a synthesis filter in association with the division at the time of information expansion will be maintained. The frequency-domain characteristics of the input signal can be acted on easily without obstructing the condition of canceling the aliasing noise without requiring a new mechanism or device other than the information compressing mechanism or device.