DESCRIZIONE
The invention relates to a method for compressing data D (nT) (65) that represent a time-dependent signal A(t) (45). The time-dependent signal A(t) (45) comprises a multiplicity of time-dependent signal elements Ai(t) (where i=1,..., NoS) (46-50). The method comprises the steps of: reception of a multiplicity of spectra Si(f) (where i=1,..., NoS) (106-110), wherein each spectrum Si(f) (106-110) corresponds to one of the time-dependent signal elements Ai(t) (46-50), wherein each spectrum Si(f) (106-110) comprises a multiplicity of frequencies fj (where j=1,, NoP) (111-116) and a multiplicity of amplitudes aj,i (where j=1,..., NoP and i=1,..., NoS) (121-126) of the multiplicity of frequencies fj (111-116); generation of a compressed data record (CDS); ascertainment of a respective number of coefficients (ARC) of an autoregressive model for the multiplicity of amplitudes aj,i (121-126) of each of the multiplicity of frequencies fj (111-116); and generation of the compressed data record (CDS), wherein the compressed data record (CDS) comprises at least the number of coefficients (ARC) and the frequencies fj(111-116) associated with the coefficients (ARC).