Hardware context vector generator for JPEG2000 block-coding
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United States of America Patent
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Sep 13, 2005
Grant Date -
Feb 27, 2003
app pub date -
Jun 25, 2002
filing date -
Jun 29, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A hardware context vector codec/generator which can be used in the block coder of a discrete wavelet transform (DWT) codec. The context vector codec/generator consists mostly of three columns of context vector registers where the context vectors move in parallel from column to column while the bits in the context vectors are modified by digital logic gates placed before each column. The digital logic gates are controlled by the results of the block coder scanning quantized wavelet coefficients. The preferred embodiment is used in a JPEG2000 codec.
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