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:
Jul. 19, 1994
Filed:
Dec. 28, 1992
Toshiaki Kitsuki, Tokyo, JP;
Akira Sawada, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A discrete cosine transformation processor subjects a plurality of input data to addition or subtraction at an adder/subtracter with two combinations according to the control signal every clock pulse so as to output a plurality of combination data. The combination data are assigned to eight groups according to certain combinations and each of them is input to one of eight selection circuits. The selection circuit selects one data from the combination input data according to the control signal and outputs the selected data every clock pulse. A multiplier receives the data selected by the selection circuit and multiplies it by a predetermined coefficient every clock pulse. Further, a second adder/subtracter subjects the output data from the multiplier to addition or subtraction in different combinations according to the control signal to determine cosine transformation coefficient to inverse cosine transformation coefficients.