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:
Sep. 16, 2014
Filed:
Nov. 11, 2010
Tomofumi Yamanashi, Kanagawa, JP;
Toshiyuki Morii, Kanagawa, JP;
Hiroyuki Ehara, Kanagawa, JP;
Panasonic Intellectual Property Corporation of America, Torrance, CA (US);
Abstract
There is disclosed an encoder apparatus whereby, when a band expanding technique for encoding, based on the spectral data of a lower frequency portion, the spectral data of a higher frequency portion is applied to a lower layer in a hierarchical encoding/decoding system, an efficient encoding can be performed in an upper layer as well, thereby improving the decoded-signal quality. In an encoder apparatus (), a second layer decoder unit () calculates a spectrum (differential spectrum), which is to be encoded in a third layer encoder unit () that is an upper layer of the second layer decoder unit (), by applying such an ideal gain (first gain parameter a) that minimizes the energy of the differential spectrum.