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:
Jan. 29, 2002
Filed:
Mar. 09, 1999
Applicant:
Inventors:
Jar-Ferr Yang, Tainan, TW;
Chih-Peng Fan, Miaulee Hsien, TW;
Assignee:
National Science Council, Taipei, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 1/714 ;
U.S. Cl.
CPC ...
G06F 1/714 ;
Abstract
An apparatus with new fixed-coefficient recursive structures for computing discrete cosine transforms with the power-of-two length is disclosed. The fixed-coefficient recursive structures are developed from exploration of periodicity embedded in transform bases, whose indices can form a complete residue system or a complete odd residue system. Distinctively, we found that properly selected fixed-coefficient filters achieve lower round-off errors than the nominal variable-coefficient ones for computing DCTs in finite-word-length machines.