Apparatus for providing error correction data in a digital transfer system

摘要

An apparatus for providing error correction data in a digital data transfer system, which receives a clock signal to provide a first signal. Information data is received and a second signal is provided using the information data, which is received in groups each having a first predetermined number of elements. A plurality of aROMs provide Galois Field multiples in look-up tables, that are addressed using the first signal to provide a first address component and using the second signal to provide a second address component. The error correction data is in groups each having a second predetermined number of elements. A RAM is accessible by a Trellis encoder and has an array for holding the information data elements and error correction data elements. <IMAGE>