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. 27, 2026
Filed:
Sep. 18, 2023
Apple Inc., Cupertino, CA (US);
Yeqing Wu, Cupertino, CA (US);
Yunfei Zheng, Santa Clara, CA (US);
Alican Nalci, Cupertino, CA (US);
Yixin Du, Milpitas, CA (US);
Hilmi Enes Egilmez, Santa Clara, CA (US);
Guoxin Jin, San Diego, CA (US);
Alexandros Tourapis, Los Gatos, CA (US);
Jun Xin, San Jose, CA (US);
Hsi-Jung Wu, San Jose, CA (US);
APPLE INC., Cupertino, CA (US);
Abstract
Improved lossless entropy coding techniques for coding of image data include selecting a context for entropy coding based on an ordered scan path of possible context locations. A symbol for a current location within a source image may be entropy coded based on a context of prior encoded symbols of other locations within source images, where the context is selected based on an ordered scan path enumerating a series of potential context locations within one or more source images. To select a context, a predetermined number of prior symbols may be selected by qualifying or disqualifying locations in the scan path, and then the current symbol may be encoded with a context based on prior symbols corresponding to the first qualifying context locations in the order of the scan path.