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Improved Arithmetic Unit for JBIG Coding Disclosure Number: IPCOM000007632D
Original Publication Date: 2002-Apr-10
Included in the Prior Art Database: 2002-Apr-10

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Colin MacDonald Thomas Volpe


The ITU-T Specification T.82 Information Technology Coded Representation of Picture and Audio Information Progressive Bi-Level Image Compression prepared by the Joint Bi-level Image experts Group (JBIG) describes the registers and flow for compliant arithmetic coding. This article describes various modifications to registers and flow that give a hardware coding engine reduced cycle time but maintain compatibility with the standard. The hardware coding engine takes two clocks to code each pixel or three if a movement of coded data is involved.