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. 01, 2003
Filed:
Feb. 28, 2000
Liang-Gee Chen, Shindian, TW;
Po-Cheng Wu, Tainan, TW;
Yuan-Chen Liu, Taipei, TW;
Yeong-Kang Lai, Shindian, TW;
National Science Council, Taipei, TW;
Abstract
An architecture for performing the two-dimensional discrete wavelet transform includes a transform module including a first stage and a second stage for decomposing an input image into four bands, and among the four bands, the band having the low frequency in both horizontal and vertical direction serves as the input image for next level decomposition operation; a multiplexer for selecting the band having the low frequency in both horizontal and vertical direction as the input image to feed into the transform module; and an optional memory module for storing the band having the lowest frequency in both horizontal and vertical direction. The polyphse decomposition technique is employed to the decimation filters of the first stage for segmenting the coefficients of the decimation filters of the first stage into an odd-numbered part and an even-numbered part, and the coefficient folding technique is employed to the decimation filters of the second stage such that every two coefficients of the decimation filters of the second stage share one set of a multiplier, an adder, and a register.