Abstract: The present invention relates to a speech procession systems comprising a frame handler unit (100) for dividing the incoming speech signal into frames and subframes of samples, a short-term analyzer (200) connected to the frame handler unit (100) for calculating short-term characteristics of the frames of the input speech signal, a short-term redundancy removing unit (250) connected to the short-term analyzer (200) for eliminating short-term characteristics of the frames of the input speech signal and creating noise shaped speech signal, a long-term analyzer (300) connected to the short-term redundancy removing unit (250) for calculating and predicting long-term characteristics of the noise shaped speech signal, a long-term redundancy removing unit (350) connected to the long-term analyzer (300) for eliminating long-term characteristics of the noise shaped speech signal or eliminating short-term and long-term characteristics of the frames of the speech input signal, and in such a way creating a target vector,