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:
Nov. 11, 2008
Filed:
Dec. 19, 2003
Liang-gee Chen, Taipei, TW;
Hung-chi Fang, Taipei, TW;
Yu-wei Chang, Taipei, TW;
Tu-chih Wang, Taipei, TW;
Ya-yun Shih, Taipei, TW;
Liang-Gee Chen, Taipei, TW;
Hung-Chi Fang, Taipei, TW;
Yu-Wei Chang, Taipei, TW;
Tu-Chih Wang, Taipei, TW;
Ya-Yun Shih, Taipei, TW;
National Taiwan University, Taipei, TW;
Abstract
The present invention provides a high-speed, memory efficient parallel coding technique for embedded block coding with optimized truncation (EBCOT) used in still image compression. Attributing to parallel processing method and structure, it processes a discrete wavelet transform (DWT) coefficient at a clock cycle without any state variable stored. Therefore, the need of state variable memory can be avoid and the external memory bandwidth can be reduced. With the same cost of chip-area and lower power consumption, the processing rate of this invention is several times higher than conventional schemes. Furthermore, the present invention processes 50 M coefficients per second at 100 MHz and can encode lossless HDTV 720 p resolution pictures at 30 fps in real time.