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:
Jun. 28, 1994
Filed:
Dec. 19, 1991
Koichi Shibata, Hachiouji, JP;
Masaaki Takizawa, Suginami, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A matrix multiplier used in a picture transforming coder is provided for multiplying an input signal matrix by a coefficient matrix configured to comprise as many constant multipliers as absolute values of coefficients in the transform coefficient matrix for handling the signal matrix as common multiplicands, a plurality of selectors for selecting values necessary for computing elements of the matrix product from multiplication results output by the constant multipliers and a respective accumulator assigned to each of the selectors for accumulating the selected values to finally provide an element of the matrix product. As a result, since the processing can be done by merely performing as many fixed multiplications as absolute values of the coefficients in the transform coefficient matrix, the multipliers can be implemented as a relatively simple combination of adders, allowing the entire size of a picture information transforming coder or the like to be reduced.