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US 2008/0181520 A1Published application
Method and Apparatus for Encoding and Decoding Subband Decompositions of Signals
AssigneeKT Tech, Inc.
InventorsRobert W. Buccigrossi, Bao T. Lerner, John F. Pierce
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Abstract
An aspect of the present invention includes a method of encoding coefficients of a subband decomposition, to prepare the coefficients for compression. Another aspect of the present invention includes an inverse method of decoding coefficients of a subband decomposition, after they have been decompressed. Particular features and other aspects of the present invention are indicated in the specification, including the drawings and claims.
Claims2
A method of efficiently decoding a signal, including:
- receiving a zero tree encoded signal;
- decoding the zero tree encoded signal, including
- reconstructing at least one of an A-tree or a B-tree of leading zero values for a pyramid of coefficients having parent and child relationships,
- wherein parent nodes in the A-tree indicate a minimum number of leading zeros for coefficients at children nodes and descendants of the children nodes and
- wherein grandparent nodes in the B-tree indicate a minimum number of leading zeros for coefficients at grandchildren nodes and descendants of the grandchildren nodes;
- and
- reconstructing an original signal from the A-tree and/or B-tree of zero values and coefficients;
- and
- outputting or storing to memory the reconstructed original signal.
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A method of efficiently encoding and sending a signal, including:
- receiving and encoding an original signal to a zero tree encoded signal, including
- constructing at least one of an A-tree or a B-tree of leading zero values for a pyramid of coefficients having parent and child relationships,
- wherein parent nodes in the A-tree indicate a minimum number of leading zeros for coefficients at children nodes and descendants of the children nodes and
- wherein grandparent nodes in the B-tree indicate a minimum number of leading zeros for coefficients at grandchildren nodes and descendants of the grandchildren nodes;
- and
- walking the A-tree and/or B-tree to construct a stream including zero values and coefficients;
- and
- outputting or storing to memory the encoded signal.
5 more elements
Dependencies are inferred from the claim text.