Data compression
AssigneeAyscough Visuals LLC
InventorDonald Martin Monro
Life of this patent
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Abstract
A method of data compression, for example for images or audio signals, comprises encoding the data using a transform such as a wavelet transform or a DCT, grouping the transform coefficients by most significant bit, and/or bit value, and transmitting them group by group. Where the transform uses a code book, such as matching pursuits, the coefficients may further be grouped by code book value. In one embodiment, the method allows the data to be described entirely by the positions of the coefficients, and the groupings, without any need to store or transmit any coefficient value information whatsoever.
Claims23
A method of data compression comprising:
- applying a transform to data to derive a plurality of transform coefficients;
- dividing the coefficients into a plurality of groups, whereby the coefficients are grouped according to a characteristic of coefficient value, whereby the coefficients are grouped according to their first significant bit, and whereby the coefficients are grouped in any desired order by the plurality of groups;
- and
- sequentially storing or transmitting the groups as compressed data.
Dependencies are inferred from the claim text.