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. 18, 2007
Filed:
Apr. 18, 2003
Masahiro Serizawa, Tokyo, JP;
Yoshiaki Nozawa, Tokyo, JP;
Masahiro Serizawa, Tokyo, JP;
Yoshiaki Nozawa, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A speech decoding device is provided is capable of reducing degradation of speech quality caused by concealment processing performed when a loss of a packet has occurred, e.g., in speech packet communications using a VoIP (Voice over Internet Protocol) or the like. A decoding circuit decodes speech from a packet received through an input terminal and stores an internal signal in an updating buffer circuit, the internal signal produced in the decoding process and to be used in a decoding process for a subsequent packet to be subsequently received. The decoding circuit produces, based on the internal signal stored in the updating buffer circuit, concealed speech corresponding to a packet having not been received, and outputs the produced concealed speech. The internal signal is updated using the concealed speech.