lookup table


Also found in: Dictionary, Thesaurus, Medical, Legal, Financial, Acronyms, Wikipedia.

lookup table

An array or matrix of data that contains items that are searched. Lookup tables may be arranged as key-value pairs, where the keys are the data items being searched (looked up) and the values are either the actual data or pointers to where the data are located. Sometimes, lookup tables contain only data items (just values, not key-value pairs). For example, in a 256-color palette, the location in the table and the key are synonymous (item 0, item 1, item 2, etc.). See table lookup, index, indexed color, hash table and key-value pair.
References in periodicals archive ?
This seems brilliant: Excel will never have to examine more than two rows in the three-row lookup table.
Lookup Table is enabled based on the switching activity of logic blocks.
For PWM waveform generation a lookup table that corresponds to the desired or similar to the desired PWM can be pre- programmed in the microcontroller [7].
In computer science, a lookup table is an array that replaces runtime computation with a simpler array indexing operation.
The self-allocator will then reallocate a new DIS for FC7523 and generates the new DISID as DIS7523-1 and update the Lookup Table.
The IP/MAC checking module is formed by comparing data in the previously suggested IP/MAC matching table and checking the Blacklist Lookup Table stored in the previous SIP session.
For small data sets, and if the algorithm is known, or at least accessible, you can easily build a lookup table or apply brute force attack.
For example, you should always do a machine lookup table generation after you perform a color adjust.
It delivers a brightness of 250 nits, a 450:1 contrast ratio and a 10-bit internal lookup table for adjustment of gamma characteristics.
Let's name the lookup table COMM_Rates so it will be easier to refer to later.
Users can drive the parameters of a symbol by linking to any ODBC source, including spreadsheets or relational databases, for lookup table symbol automation.
Chapter 7 discusses the lookup table and sine read-only-memory (ROM) compression.