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:
Mar. 30, 1999
Filed:
Nov. 26, 1997
Liuyang Yang, Portland, OR (US);
Intel Coproration, Santa Clara, CA (US);
Abstract
The present invention relates to a system for decomposing and recomposing wavelets with minimum filter delay. The system includes multiple low-pass filters and multiple high-pass filters. Each filter in the system has associated filter coefficients. A filter shift value is selected for each filter such that the sum of the shift values for the low-pass filters equals the sum of the shift values for the high-pass filters. The filter coefficients for each filter are shifted according to the shift value associated with the filter. The filter shift values are selected such that the filter shift values associated with a first low-pass filter and the filter shift value associated with a first high-pass filter are both even or both odd. The system can provide center-aligned filters as well as a perfect reconstruction filter bank.