Hardware context vector generator for JPEG2000 block-coding

Details Hardware context vector generator for JPEG2000 block-coding Hardware context vector generator for JPEG2000 block-coding

2005-09-13

2005-09-13

Mai, Tan V. (Department: 2193)

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

C708S203000

Reexamination Certificate

active

06944639

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.

REFERENCES:
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patent: 6587588 (2003-07-01), Bottou et al.
patent: 6822587 (2004-11-01), Henry
patent: 2003/0053702 (2003-03-01), Hu
patent: 2003/0133500 (2003-07-01), Auwera et al.

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