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    3.
    发明专利
    未知

    公开(公告)号：DE3783905D1

    公开(公告)日：1993-03-11

    申请号：DE3783905

    申请日：1987-03-05

    Applicant: IBM

    Inventor： GALAND CLAUDE ,  ROSSO MICHELE ,  LIETHOUDT THIERRY ,  ELIE PHILIPPE ,  LANCON EMMANUEL ,  CREPY HUBERT

    IPC: G01H3/04 ,  G10L19/08 ,  G10L9/14

    Abstract: The digital process includes setting signal dependent positive threshold (Th+) and negative threshold (Th-). Samples representative of the signal block are located and stored having magnitudes above and below the thresholds. Significant sign transitions are located within the stored samples. The number M' of stored samples between the consecutively located significant transitions is computed and a rough value M is computed as the mean value of M'. Autocorrelation zones are set about the multiples of M spaced peak samples and the considered block of signal samples is split into consecutive sub-blocks. A current sub-block of samples is autocorrelated with sub-blocks of samples the first of which is one sample of an autocorrelation zone.

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