We present a new technique for the concurrent asynchronous/GALS implementation of polychronous specifications. We start from programs written in multi-clock languages such as Signal/Polychrony or Esterel. We provide compact data structures and corresponding algorithms for program analysis, following the theory of weakly endochronous systems. Finally, we produce multi-threaded deterministic asynchronous/GALS implementations that retain as much as possible of the concurrency of the initial specification.On présente dans ce rapport une nouvelle technique pour l'implantation concurrente de spécifications multi-horloges. A partir de programmes écrits en langages synchrones comme Signal/Polychrony ou Esterel, on fournit des structures de données ...