(19)
(11) EP 0 361 432 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
26.09.1990 Bulletin 1990/39

(43) Date of publication A2:
04.04.1990 Bulletin 1990/14

(21) Application number: 89117837.8

(22) Date of filing: 27.09.1989
(51) International Patent Classification (IPC)5: G10L 9/14
(84) Designated Contracting States:
AT BE CH DE ES FR GB GR LI NL SE

(30) Priority: 28.09.1988 IT 6786888

(71) Applicants:
  • SIP SOCIETA ITALIANA PER l'ESERCIZIO DELLE TELECOMUNICAZIONI P.A.
    I-10122 Torino (IT)
  • ITALTEL SOCIETA ITALIANA TELECOMUNICAZIONI s.p.a.
    I-20149 Milano (IT)

(72) Inventors:
  • Omologo, Maurizio
    Sarmeola di Rubano Padova (IT)
  • Sereno, Daniele
    Torino (IT)

(74) Representative: Riederer Freiherr von Paar zu Schönau, Anton et al
Van der Werth, Lederer & Riederer Postfach 2664
84010 Landshut
84010 Landshut (DE)


(56) References cited: : 
   
       


    (54) Method of and device for speech signal coding and decoding by means of a multipulse excitation


    (57) A coding-decoding method using a mulipulse analysis-by-­synthesis excitation technique comprises, in the decoding phase, cascaded long-term and short-term synthesis filterings. The lag and gain of the long-term synthesis and the excitation pulses are determined during the coding phase within the analysis-by-synthesis procedure in two subsequent steps, in the first of which the lag and the gain are determined, while in the second the positions and the amplitudes of the excitation pulses are determined. The invention concerns also the device performing the method.







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