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:
Oct. 09, 2001
Filed:
Jan. 12, 1998
Masaaki Isozaki, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
An audio signal encoding apparatus is constructed by: means for separating an input audio signal into a plurality of hierarchical data on the basis of a frequency; a plurality of encoding means for respectively encoding the plurality of hierarchical data; and error correction encoding means for adding an error correction code to an output of each of the plurality of encoding means, wherein the error correction encoding means raises error correcting ability which is caused by the error correction encoding for the hierarchical data on the low band side among the plurality of hierarchical data than that for the hierarchical data on the high band side. A bit allocation amount may be determined in accordance with a scale factor and a psychological auditory sensation model. Additionally, the busyness degree of a transmission path may be detected and a predetermined band or bands of the hierarchical data to be decoded or used by a reception side may be selected in accordance with the busyness degree.