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:
Aug. 20, 1996
Filed:
Sep. 09, 1993
Masahiro Gion, Kyoto, JP;
Masaki Toyokura, Osaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A subtracter performs a subtraction (Xi-Yi) per corresponding components of two pairs of N-dimensional vector data (X1, X2, . . . XN), (Y1, Y2, . . . , YN). An exclusive disjunction circuit selects (Xi-Yi) when a result of subtraction is positive, and inverts bits of the result of subtraction to select the bit-inverted data (Xi-Yi) when the result of subtraction is negative. The selection is carried out using a most significant bit of the result of subtraction as a control signal. An accumulator accumulates the selected data and a value of the most significant bit of the result of subtraction. Accordingly only one subtracter suffice. Since the operation of adding 1 to the inverted data of the result of subtraction when the result of subtraction is negative is carried out concurrently with the accumulation of the result of subtraction by the accumulator, a vector correlation detecting circuit with less element and reduced operation time is contemplated.