Coded data generation or conversion – Digital code to digital code converters
Reexamination Certificate
2007-03-27
2007-03-27
Jeanglaude, Jean Bruner (Department: 2819)
Coded data generation or conversion
Digital code to digital code converters
C382S240000
Reexamination Certificate
active
11114200
ABSTRACT:
A system for audio data processing including sub-systems for compression and for de-compression. The compression sub-system includes an AD converter, a segment-based multi-channel splitter splitting and segmenting signals into channels each with segments, multi-level 1D discrete wavelet transformers each discrete wavelet transforming for a respective channel each segment thereof in sequence and recursively through a predetermined number of filtering levels into wavelet coefficients, quantizers, a multiplexer multiplexing quantized wavelet coefficients into 2-D arrays, and an embedded block coder coding the 2-D arrays into code blocks, discarding some of the code blocks, truncating a bit stream embedded in each remaining code block, and stringing the truncated bit stream embedded in each remaining code block into a compressed data stream. Another compression sub-system includes a non-segment-based multi-channel splitter, and a plurality groups of 1D discrete wavelet transformers.
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Hsu Charles
Huang Gen Dow
A. Marquez, Esq. Juan Carlos
Fisher Esq. Stanley P.
Jeanglaude Jean Bruner
Reed Smith LLP
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