Haar wavelet transform embedded lossless type II discrete cosine transform
AssigneeThe Aerospace Corporation
InventorHsieh S. Hou
Life of this patent
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Abstract
A shared lossless Haar transform and an appended discrete cosine transform type-II are combined to form a discrete cosine type-II transform in a parallel pipelined architecture for providing lossless data transformation.
Claims9
A transform for transforming Haar transform data into DCT transformed data, the transform useful for transforming the Haar transform data into the DCT transform data for communicating the transform data in a transform domain over a communication data link, the transform comprising,
- four first process units for rotating the Haar transform data into first rotated words,
- a first latch for latching and permuting the first rotated words into first latched words,
- four second process units for rotating the first latched words into second rotated words,
- a second latch for latching and permuting the second rotated words into second latched words, and
- three third process units for rotating the second latched words into the DCT transform data.
A system for transforming input data into DCT-II transformed data, the system useful for transforming the input data into the DCT-II transform data for communicating the input data in a transform domain over a communication data link, the system comprising,
- a shared Haar transform circuit for transforming the input data into Haar transformed data, and
- a appended DCT-II transform circuit for transforming the Haar transformed data into the DCT-II transform data, the DCT-II transform data is reversible into the input data as lossless transform data when the DCT-II transform data is inversely transform by the appended DCT-II transform and the shared Haar transform.
Dependencies are inferred from the claim text.