公开(公告)号：CH629011A5

公开(公告)日：1982-03-31

申请号：CH471678

申请日：1978-05-01

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： GANDINI FRANCESCO ,  GIANDONATO GIUSEPPE ,  IMPALLOMENI ENRICO ,  MONTAGNA ROBERTO

IPC: H04M11/06 ,  H04L27/00 ,  H04L27/18 ,  H04M11/00 ,  G06F9/06

公开(公告)号：DE69028434D1

公开(公告)日：1996-10-17

申请号：DE69028434

申请日：1990-05-02

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： MONTAGNA ROBERTO ,  OMOLOGO MAURIZIO ,  SERENO DANIELE

IPC: G10L19/002 ,  G10L19/02 ,  G10L19/10 ,  G10L19/113 ,  G10L19/12 ,  G10L25/06 ,  H04B1/66 ,  G10L9/14

公开(公告)号：CA2016042A1

公开(公告)日：1990-11-03

申请号：CA2016042

申请日：1990-05-03

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： MONTAGNA ROBERTO ,  OMOLOGO MAURIZIO ,  SERENO DANIELE

IPC: G10L19/002 ,  G10L19/02 ,  G10L19/10 ,  G10L19/113 ,  G10L19/12 ,  G10L25/06 ,  H04B1/66 ,  G10L9/18

公开(公告)号：DE2818675A1

公开(公告)日：1978-11-09

申请号：DE2818675

申请日：1978-04-27

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： GANDINI FRANCESCO ,  GIANDONATO GIUSEPPE ,  IMPALLOMENI ENRICO ,  MONTAGNA ROBERTO

IPC: H04M11/06 ,  H04L27/00 ,  H04L27/18 ,  H04M11/00 ,  G06F9/00 ,  H04Q3/54

公开(公告)号：CA2016042C

公开(公告)日：1998-04-28

申请号：CA2016042

申请日：1990-05-03

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： OMOLOGO MAURIZIO ,  MONTAGNA ROBERTO ,  SERENO DANIELE

IPC: G10L19/002 ,  G10L19/02 ,  G10L19/10 ,  G10L19/113 ,  G10L19/12 ,  G10L25/06 ,  H04B1/66 ,  G10L9/18

Abstract: A method of and apparatus for coding wide-band audio signals are provided, wherein the band of the signal to be coded is split into two sub-bands; the sign als in each sub-band are coded in coders (CD1, CD2) operating according to analysis-by-synthesis techniques and exploiting short-term and long-term correlations in the speech signal. Two embodiments of such coders are described, the first utilizing a multi-pulse excitation and the other the CELP coding technique.

公开(公告)号：CA1221180A

公开(公告)日：1987-04-28

申请号：CA465213

申请日：1984-10-11

Applicant: CSELT CENTRO STUDI LAB TELECOM ,  TELESPAZIO SPA

Inventor： MONTAGNA ROBERTO ,  NEBBIA LUCIANO

IPC: H04B3/20 ,  H04B3/23 ,  H04M3/18

Abstract: In the determination of equivalent echo channel pulse response, digital filtering techniques of the transversal adaptive type are used, and the pulse response of the equivalent echo channel is subdivided into three intervals, the second of which consists of the significant portion of the pulse response and is determined by an iterative search for the value and position of the coefficient of maximum absolute value; the first represents a pure delay and the third represents the contribution of the lowest frequencies of the base band. In simulating the echo-signal only the pulse-response coefficients whose index is comprised in the second interval are considered, together with samples of the signal to be copied belonging to preceding sampling instants whose index is also comprised in the second interval.

公开(公告)号：IT8368047D0

公开(公告)日：1983-10-12

申请号：IT6804783

申请日：1983-10-12

Applicant: CSELT CENTRO STUDI LAB TELECOM ,  TELESPAZIO SPA

Inventor： MONTAGNA ROBERTO ,  NEBBIA LUCIANO

IPC: H04B3/20 ,  H04B3/23 ,  H04M

公开(公告)号：IT1208769B

公开(公告)日：1989-07-10

申请号：IT6804783

申请日：1983-10-12

Applicant: CSELT CENTRO STUDI LAB TELECOM ,  TELESPAZIO SPA

Inventor： MONTAGNA ROBERTO ,  NEBBIA LUCIANO

IPC: H04B3/20 ,  H04B3/23 ,  H04M

公开(公告)号：DE3466456D1

公开(公告)日：1987-10-29

申请号：DE3466456

申请日：1984-10-11

Applicant: CSELT CENTRO STUDI LAB TELECOM ,  TELESPAZIO SPA

Inventor： NEBBIA LUCIANO ,  MONTAGNA ROBERTO

IPC: H04B3/20 ,  H04B3/23

公开(公告)号：AU565194B2

公开(公告)日：1987-09-10

申请号：AU3369184

申请日：1984-09-28

Applicant: CSELT CENTRO STUDI LAB TELECOM ,  TELESPAZIO SPA

Inventor： MONTAGNA ROBERTO ,  NEBBIA LUCIANO

IPC: H04B3/20 ,  H04B3/23 ,  H04M9/08