Method of and apparatus for generating look-up table data
AssigneeDainippon Screen Mfg. Co., Ltd.
InventorKazuya Akiyama
Life of this patent
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Abstract
Basic data obtained by thinning-out data to be written in a look-up table are previously operated by a computer and stored in a basic memory table. Coefficient data required for linearly interpolating the basic data are stored in a coefficient memory table. The basic data and the coefficient data are read in accordance with address designation by an address generator while being related with each other and subjected to interpolation operation by an interpolation computer element, and data thus obtained are sequentially written in the look-up table.
Claims18
A method of generating look-up table data, comprising the steps of:
- previously operating on and storing basic data, obtained by thinning-out data to be written in a look-up table which is stored in a memory, at prescribed intervals;
- previously storing, in a coefficient memory table, coefficient data required for linearly interpolating said basic data;
- performing an interpolation operation in an interpolation computing element by reading said basic data and said coefficient data while relating the same with each other;
- and
- sequentially writing data obtained by said interpolation operation in said look-up table.
An apparatus for generating look-up table data, comprising:
- a computer for operating on basic data, obtained by thinning-out data to be written in a look-up table which is stored in a memory, at prescribed intervals;
- a basic memory table for storing said basic data in previously assigned addresses;
- a coefficient memory table for storing, in previously assigned addresses in a coefficient memory table, coefficient data required for linearly interpolating said basic data;
- an address generator for generating read addresses of said basic and coefficient memory tables and write addresses of said look-up table while correlating the same with each other;
- and
- an interpolation computing element for receiving said basic and coefficient data read along said read addresses to perform an interpolation operation, data obtained by said interpolation operation being written in said look-up table in accordance with said write addresses.
Dependencies are inferred from the claim text.