Data compression/decompression with aliasing error reduction

Details Data compression/decompression with aliasing error reduction Data compression/decompression with aliasing error reduction

1992-01-14

1993-11-23

Logan, Sharon D.

Coded data generation or conversion

Digital code to digital code converters

With error detection or correction

341 51, H03M 730

Patent

active

052648486

ABSTRACT:
A data compression/decompression method incorporating aliasing error reduction. An array of terrain data is first scanned for a set of modes and indexes are assigned to those modes. These modes are used as precision points for compression and decompression. A compressed index database is created using the associated modes for the original terrain data. If the number of modes exceed a predetermined number the number of modes is collapsed using an aliasing technique. The alias error is tracked during the compression cycle. Total aliasing error is kept to a local minimum. The compressed data is decompressed by decoding and accessing the index database for the elevation alias. Further compression is accomplished using a lossless coding technique.

REFERENCES:
patent: 4862167 (1989-08-01), Copeland, III
patent: 5049881 (1991-09-01), Gibson et al.
patent: 5151697 (1992-09-01), Bunton

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