The Qx-coder

The IBM Adaptive Bilevel Image Compression (ABIC) algorithm depends upon the hardware-optimized Q-coder. The Joint Bi-level Image Experts Group (JBIG) settled upon a software-optimized QM-coder. This paper explores the incompatibilities of the hardware- and software-optimized binary arithmetic codin...

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Vydáno v:IBM journal of research and development Ročník 42; číslo 6; s. 767 - 784
Hlavní autoři: Slattery, M. J., Mitchell, J. L.
Médium: Journal Article
Jazyk:angličtina
Vydáno: Armonk International Business Machines Corporation 01.11.1998
Témata:
Algorithms
Conventions
Data compression
Software
ISSN:0018-8646, 0018-8646, 2151-8556
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Popis
Shrnutí:The IBM Adaptive Bilevel Image Compression (ABIC) algorithm depends upon the hardware-optimized Q-coder. The Joint Bi-level Image Experts Group (JBIG) settled upon a software-optimized QM-coder. This paper explores the incompatibilities of the hardware- and software-optimized binary arithmetic coding conventions and reports on the solution that allowed a merged Qx-coder in hardware. A unique hardware solution is presented for the termination of the JBIG data stream (CLEARBITS). The probability estimation is presented in a common format. Detailed flowcharts are included in the Appendix. An ASIC core is available that supports both the ABIC and JBIG bilevel data compression standards using this merged Qx-coder.
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ISSN:0018-8646
0018-8646
2151-8556
DOI:10.1147/rd.426.0767