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. 10, 2007
Filed:
Jan. 03, 2003
Atsushi Hatabu, Tokyo, JP;
Atsushi Hatabu, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
In a process of resolving the two-dimensional orthogonal transformation into the one-dimension orthogonal transformations in a horizontal direction and a vertical direction, with respect to each signal vector within the block memory to be orthogonal-transformed in a vertical direction orthogonal transforming unit after having been orthogonal-transformed in a horizontal direction orthogonal transforming unit, a power calculating unit calculates the power of each signal vector, a threshold obtaining unit requires a threshold enabling the quantized coefficient signal to take a value other than zero, and a value comparing unit compares the both powers. When the power calculated by the power calculating unit is below the threshold, the vertical-directional orthogonal transformation and quantization processing as for the corresponding signal vector is omitted and a zero coefficient vector generating unit generates the quantized coefficient signal vector simply consisting of zero and supplies it as the calculation result.