Decompression for printing and display systems
AssigneeXerox Corporation
InventorRobert R. Buckley
Life of this patent
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Abstract
A method for decompressing a job in a document management system, such as a printer, scanner or display device, is provided. The method includes buffering the compressed image data, and decompressing the buffered compressed image data such that the decompressing varies as a function of a resolution level and either a first set of quality layers or a second set of quality layers. The number of quality layers in the first quality layer set is greater than the number of quality layers in the second quality set and, pursuant to the decompressing, the resolution level is corresponded with the second quality layer set so that the compressed image data is decompressed with less quality layers than in the first quality layer set.
Claims10
A method for decompressing a job in a document management system, the job including compressed image data, the compressed image data being encoded using a plurality of resolution levels, each resolution level having a corresponding set of quality layers, comprising:
- buffering, using a memory buffer, the compressed image data;
- determining a number of resolution levels of the compressed print related data to be decompressed;
- selecting, using a processor, a number of quality layers of the compressed print related data to be decompressed, the selection of the number of quality layers of the compressed print related data to be decompressed, being based upon the determined number of resolution levels of the compressed print related data to be decompressed, the number of quality layers to be decompressed for each resolution level being equal, the number of selected quality layers being less than a number of quality layers in the set of quality layers;
- and
- decompressing the compressed image data based upon the selected number of quality layers and the determined number of resolution levels.
A decompression system for decompressing a job in a document management system, the job including compressed image data, the compressed image data being encoded using a plurality of resolution levels, each resolution level having a corresponding set of quality layers, and the compressed image data being buffered in memory, comprising:
- a processor;
- said processor determining a number of resolution levels of the compressed print related data to be decompressed;
- said processor selecting a number of quality layers of the compressed print related data to be decompressed, the selection of the number of quality layers of the compressed print related data to be decompressed, being based upon the determined number of resolution levels of the compressed print related data to be decompressed, the number of quality layers to be decompressed for each resolution level being equal, the number of selected quality layers being less than a number of quality layers in the set of quality layers;
- said processor decompressing the compressed image data based upon the selected number of quality layers and the determined number of resolution levels.
A printing system for processing a print job including compressed print related data, the compressed print related data being encoded using a plurality of resolution levels, each resolution level having a corresponding set of quality layers, comprising:
- a decompression system for decompressing the compressed print related data;
- said decompression system including a processor and a program for decompressing the compressed print related data;
- said decompression system determining a number of resolution levels of the compressed print related data to be decompressed;
- said decompression system selecting a number of quality layers of the compressed print related data to be decompressed, the selection of the number of quality layers of the compressed print related data to be decompressed, being based upon the determined number of resolution levels of the compressed print related data to be decompressed, the number of quality layers to be decompressed for each resolution level being equal, the number of selected quality layers being less than a number of quality layers in the set of quality layers;
- said decompression system decompressing the compressed print related data based upon the selected number of quality layers and the determined number of resolution levels.
Dependencies are inferred from the claim text.