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:
Apr. 26, 1994
Filed:
Mar. 01, 1993
Akira Sawada, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A linear quantizer/ inverse quantizer comprises a first shifter coupled with a data input port for dividing the value indicated by an m-bit input data signal by two for producing a first digital output signal, a multiplier for multiplying the value of an m-bit input data signal by a coefficient indicated by lower (n-2) bits of an n-bit digital code signal two bits wider than a standard digital code signal theoretically required for the linear quantization, a second shifter for dividing the product by four for producing a second digital output signal indicative of the quarter of the product, and a selector unit having three input ports respectively supplied with the m-bit input data signal, the first digital output signal and the second digital output signal, and the selector unit is responsive to the higher two bits of the n-bit digital code signal for selectively coupling the three input ports with an output port thereof so that division is replaced with multiplication without deterioration of accuracy.