JBIG coding apparatus and method with low cost,...

Details JBIG coding apparatus and method with low cost,... JBIG coding apparatus and method with low cost,...

2005-04-15

2008-10-07

Ahmed, Samir A (Department: 2624)

Image analysis

Image compression or coding

C382S233000, C382S266000, C358S539000, C375S240130

Reexamination Certificate

active

07433522

ABSTRACT:
The present invention provides an image coding apparatus and method, which can achieve a low-cost, real time, and high-performance coding process by utilizing a line buffer and an auxiliary buffer to execute a typical prediction process in JBIG encoding, a ping-pong buffer and a window template, and an adaptive encoder/decoder. The image encoding apparatus includes a typical prediction unit for storing input image data and performing typical predication in JBIG encoding of the input image data, a ping-pong buffer unit which has a plural sets of line memories for sequentially updating and storing the image data into corresponding addresses of the plural sets of line memories, and generating a template, a encoding unit for reading out the image data stored in the ping-pong buffer, and performing adaptive arithmetic encoding, and a control unit for controlling access to the ping-pong buffer unit between the typical prediction unit and the encoding unit.

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