Data transformation apparatus

Details Data transformation apparatus Data transformation apparatus

1995-01-30

1998-02-03

Rogers, Scott A.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358523, 358525, H04N 156

Patent

active

057153760

ABSTRACT:
An address exchanger and a data exchanger are provided at both sides of a plurality of look-up tables (LUTs). An even number address is constantly accessed at one of the LUTs and an odd number address is constantly accessed in the other LUTs. An interpolating operation on the basis of values output from the respective LUTs may constantly cause the same results as can be obtained without address exchange. By this, for the memory to be accessed by the odd number address and the even number address, a grid point data for other transformation characteristics may be stored. Therefore, in the data transformation apparatus performing data transformation through interpolation employing a plurality of LUTs, memories of respective LUTs can be efficiently used for permitting data transformation of a plurality of kinds of transformation characteristics.

REFERENCES:
patent: 4837722 (1989-06-01), Sara
patent: 5175701 (1992-12-01), Newman et al.

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