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:
Feb. 23, 1999
Filed:
Jan. 09, 1997
Masahiro Iwadare, Tokyo, JP;
Yuichiro Takamizawa, Tokyo, JP;
NEC Corporation, , JP;
Abstract
An encoding system is disclosed, which includes an input terminal for receiving an input signal, a signal converting portion for converting the input signal into frequency-domain signals and grouping several frequency-domain signals into blocks, an analyzing portion for analyzing the input signal and the frequency-domain signals and obtaining an allowable error, a selecting portion for selecting one of a plurality of quantizing portions that quantizes frequency-domain signals of each block corresponding to the allowable error, a plurality of quantizing portions for quantizing frequency-domain signals corresponding to selection information and calculating amplitude information and codes, at least one pulse quantizing portion for encoding only part of the frequency domain signals, a multiplexing portion for multiplexing the amplitude information, codes, and selection information, and an output terminal for outputting the multiplexed signal.