The invention relates to a method of manufacturing an indiffused optical waveguide in a substrate. Time intervals between readings can include a plurality of consumer usage activities. The L1 latches are connected to at least one multiplexer having a first output connected to an input of each odd SRL, and a second output connected to an input port of each even SRL. A control module for correlating eventaction pairs is provided, an event corresponding to the imbalance of the state of an operation system and an action corresponding to an initialization or a modification of the display or the representation of one or several scenes constituting the applications. Trellis demodulation and trellis decoding algorithms support parallel implementations, and concatenated implementations wherein the error correction decoding is implemented after the QLM demodulation.