Image compression
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United States of America Patent
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Issued Date -
Jul 3, 2003
app pub date -
Jun 3, 2002
filing date -
Jul 20, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A Low-complexity and Low-memory Entropy Coder is proposed for image compression. It includes zerotree coding, followed by the use of Golomb-Rice codes to code the result in a VLC/VLI manner. The result is a complexity similar to that of JPEG coding. The proposed algorithm does not require use of any Huffman table, significant/insignificant list or arithmetic coding and therefore its memory requirement is minimized with respect to any known image entropy coder. Experimental results are given of the use of the proposed coder. The proposed coder is suitable for parallel processing implementation, ROI (Region Of Interest) coding and as a universal entropy coder for DCT and DWT.
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