INTERLEAVING OR DE-INTERLEAVING FOR VARIABLE DATA BLOCK SIZES AND CONTINUOUS DATA RECEPTION

摘要

An apparatus for interleaving or de-interleaving a stream of data has a memory with M serially-numbered logical memory locations. The read-address generator and write-address generator are each configured to address memory locations as a function of an increment value which itself is a function of an increment value used for a previous block of data multiplied by a dimension used for interleaving or de-interleaving the previous block. The dimension is the number of columns of data to be interleaved or de-interleaved where the number of columns is an integer factor of the number of memory locations. The use of such an increment value ensures that data elements can be read in turn from a de-interleaver for a previous block while elements from the present block are written to locations that have been used. The apparatus may be used to improve the effectiveness of forward error correction in dealing with burst errors in systems such as DVB-T2.