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:
Jun. 24, 2008
Filed:
Sep. 18, 2003
Kaixuan Mao, Fremont, CA (US);
Yushan Huang, Zhejiang, CN;
Donghui Wu, Fremont, CA (US);
Anding Zhu, Zhejiang, CN;
Lingxiang Zhou, Fremont, CA (US);
Kaixuan Mao, Fremont, CA (US);
Yushan Huang, Zhejiang, CN;
Donghui Wu, Fremont, CA (US);
Anding Zhu, Zhejiang, CN;
Lingxiang Zhou, Fremont, CA (US);
ArcSoft, Inc., Fremont, CA (US);
Abstract
A method for indexing minimum coded units (MCUs) in a Joint Photographic Expert Group (JPEG) bit stream includes (1) entropy decoding a first MCU to determine a bit offset of a second MCU and a DC coefficient of the first MCU, wherein the first MCU immediately precedes the second MCU in the bit stream, and (2) indexing the second MCU by storing the bit offset and the DC coefficient in an index. The method may further include (3) receiving a request for the second MCU, (4) reading the index to determine the bit offset of the second MCU and the DC coefficient of the first MCU, and (5) entropy decoding the second MCU starting at its bit offset in the bit stream, wherein the entropy decoding the second MCU includes determining a DC coefficient of the second MCU using the DC coefficient of the first MCU.