US 6,856,701 B2
Method and system for context-based adaptive binary arithmetic codingGeneral
US 6,856,701 B2
Method and system for context-based adaptive binary arithmetic coding
Tech Center:
2600 Communications
Examiner:
Andrew W. Johns
Art Unit:
2621 Selective Visual Display Systems
Agent:
Ware, Fressola, Va Der Sluys & Adolphson LLP
Inventors:
Marta Karczewicz; Ragip Kurceren
Assignee:
Priority:
09/14/01
Filed:
11/27/01
Granted:
02/15/05
Expiration:
09/14/21
Abstract
A method and system for image coding, wherein an image is divided into a plurality of blocks for scanning. The pixels values in the scanned block are represented by a plurality of level-run value pairs, wherein the level value is indicative of a non-zero pixel value and the run value is indicative of the number of consecutive zero pixel values preceding the non-zero pixel value. A plurality of contexts indicative of the level-run value pairs are conveyed to a decoder for allowing the decoder to reconstruct the image based on the contexts. The assignment of the contexts is also based on the level value of a preceding level-run pair. Additionally, instead of an end-of-block symbol, the number of non-zero coefficients is provided to the decoder prior to conveying the contexts thereto.
Cooperative Patent Classification (CPC)
H04H04N19/176H04N