A FREQUENCY DOMAIN ENCODER FOR CONVERTING AN INPUT SIGNAL INTO AN OUTPUT DATA, A FREQUENCY DOMAIN DECODER FOR CONVERTING AN INPUT DATA INTO AN OUTPUT SIGNAL

摘要

A frequency domain encoder (100) for converting an input signal (101) into an output data (104), said frequency domain encoder comprising: a time domain filter (110) arranged for filtering the input signal (101) into a filtered signal (102), whereby said time domain filter is configured by using time domain filter parameters (108), a transformation means (120) for transforming the filtered signal (102) into a transformed data (103) represented in a frequency domain, a scaling means (130) arranged for scaling the transformed data (103) into the output data (104) using scaling coefficients (107), characterized in that said frequency domain encoder comprises: a control means (140) for deriving the time domain filter parameters (108) and the scaling coefficients (107) based on characteristics ( 106) of the input signal (101). A frequency domain decoder (400) for converting an input data (401) into an output signal (404), said frequency domain decoder comprising: an inverse scaling means (410) arranged for scaling the input data (401) into a de-scaled data (402) using de-scaling coefficients (408), an inverse transformation means (420) for transforming the de-scaled data (402) into the de-transformed signal (403) in a time domain, an inverse time domain filter (430) for filtering the de-transformed signal (403) into the output signal (404), whereby said inverse time domain filter is configured by using inverse time domain filter parameters (407), characterized in that said frequency domain decoder comprises: a further control means (440) for deriving the inverse time domain filter parameters (407) and the de-scaling coefficients (408) based on characteristics (406) of an encoded signal comprised in the input data (401).