Method and apparatus for compression using reversible wavelet transforms and an embedded codestream
OwnerAhmad Zandi, Edward Schwartz +2inventors
InventorsAhmad Zandi, Edward Schwartz, Michael Gormish, Martin Boliek
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Abstract
A compression and decompression system in which a reversible wavelet filter are used to generates coefficients from input data, such as image data. The reversible wavelet filter is an efficient transform implemented with integer arithmetic that has exact reconstruction. The present invention uses the reversible wavelet filter in a lossless system (or lossy system) in which an embedded codestream is generated from the coefficients produced by the filter. An entropy coder performs entropy coding on the embedded codestream to produce the compressed data stream.
Claims83
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An apparatus comprising:
- a wavelet transform to generate wavelet coefficients;
- a model to model the wavelet coefficients from the wavelet transform as part of a process to generate coded data;
- and
- a channel manager to control rate at which the coded data is transmitted to a limited bandwidth channel, the coded data being categorized based on significance.
A method comprising:
- generating wavelet coefficients using a wavelet transform;
- modeling the wavelet coefficients from the wavelet transform as part of a process to generate coded data;
- and
- controlling rate at which the coded data is transmitted to a limited bandwidth channel, the coded data being categorized based on significance.
Dependencies are inferred from the claim text.