Guaranteed data compression
AssigneeImagination Technologies Limited
InventorsPeter Malcolm Lacey, Simon Fenney
Life of this patent
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Abstract
A method of data compression in which the total size of the compressed data is determined and based on that determination, the bit depth of the input data may be reduced before the data is compressed. The bit depth that is used may be determined by comparing the calculated total size to one or more pre-defined threshold values to generate a mapping parameter. The mapping parameter is then input to a remapping element that is arranged to perform the conversion of the input data and then output the converted data to a data compression element. The value of the mapping parameter may be encoded into the compressed data so that it can be extracted and used when subsequently decompressing the data.
Claims13
A method of compressing data values, comprising:
- reducing a bit depth of a data value, based on a result of a comparison between a predicted size of a group of compressed data values and a threshold size, to create reduced bit depth data for compression.
A data compression unit arranged to compress data values, the data compression unit comprising:
- a first remapping element arranged to reduce a bit depth of a data value based on a result of a comparison between a predicted size of a group of compressed data values and a threshold size, to create reduced bit depth data for compression.
Dependencies are inferred from the claim text.