Procedure for speech recognition system and method for operating such a system.

System speech recognition (3) for the controlled language short message in a telecommunication terminal (1), in particular mobile phone or wireless, with a recognizer language module (5) which operates independently of the person introduction speaking, in which is stored or can set a specific vocabulary to develop short messages, each carrying element vocabulary associated at least one phoneme and representing each phoneme at least one sound according to a phonetic predetermined, characterized by a buffer vocabulary messages (13) for temporarily storing a short message sent or received, a comparator unit vocabulary (15) connected on one side with the buffer vocabulary messages (13) and secondly with the recognizer module language (5) to compare the respective memorized vocabularies and to issue new pre words Sentan in the short to a control module vocabulary message (23), a converter module Text-phoneme (9) for the conversion of new words presented in phonetic transcription and the control module Vocabulary (23) vocabulary to complement or to replace elements thereof by new words presented and phonemes associated therewith.