The present invention relates to a device and a method for extracting information from remotely detected characteristic signals. A data stream (26) derivable from electromagnetic radiation (14) emitted or reflected by an object (12) is received. The data stream(26) comprises a continuous or discrete characteristic signal (80) including physiological information and a disturbing signal portion. The physiological information is representative of at least one at least partially periodic vital signal (20). The disturbing signal portion is representative of at least one of an object motion portion and/or a non-indicative reflection portion. A relevant frequency band (92) of the data stream (26) is split into at least two defined sub bands (34a, 34b, 34c) comprising determined portions of the characteristic signal (80), each of which representing a defined temporal frequency portion potentially being of interest. The sub bands (34a, 34b, 34c) are optimized so as to derive optimized sub bands (38a, 38b, 38c), the optimized sub bands (38a, 38b, 38c) being at least partially indicative of a presence of the vital signal (20). The at least two optimized sub bands (38a, 38b, 38c) are combined so as to compose an optimized processed signal (42). Consequently, the desired vital signal (20) can be accentuated in the optimized processed signal (42).La présente invention concerne un dispositif et un procédé permettant dextraire des informations de signaux caractéristiques détectés à distance. Un flux de données (26) pouvant être déduit dun rayonnement électromagnétique (14) émis ou réfléchi par un objet (12) est reçu. Le flux de données (26) comprend un signal caractéristique continu ou discret (80) comportant des informations physiologiques et une partie de signal perturbée. Les informations physiologiques sont représentatives dau moins un signal vital au moins partiellement périodique (20). La partie de signal perturbée est représentative dune partie de mouvement dobjet et/ou dune
