TRANSCODING BETWEEN THE INDICES OF MULTIPULSE DICTIONARIES USED FOR CODING IN DIGITAL SIGNAL COMPRESSION

摘要

The invention relates to compression transcoding between pulse encoders using multipulse dictionaries wherein each pulse has a position which is localized by an index. For each current pulse position provided by the first encoder, a neighborhood (Vg, Vd) is formed around said position. positions of pulses in a set consisting of a union of neighborhoods are selected according to the positions of pulses admitted by the second encoder. The second encoder finally receives said selection (sj), involving a reduced number of pulse positions in relation to the total number of pulses of the dictionary of the second encoder.