公开(公告)号：DE19680399T1

公开(公告)日：1997-09-18

申请号：DE19680399

申请日：1996-03-07

Applicant: MOTOROLA INC

Inventor： ASHLEY JAMES PATRICK ,  PENG WEIMIN ,  ZHANG PENG

IPC: G10L19/038 ,  H03M7/30 ,  G10L9/18

公开(公告)号：FI965131A0

公开(公告)日：1996-12-19

申请号：FI965131

申请日：1996-12-19

Applicant: MOTOROLA INC

Inventor： ASHLEY JAMES PATRICK ,  PENG WEIMIN ,  ZHANG PENG

IPC: G10L19/038 ,  H03M7/30 ,  G10L

公开(公告)号：SE9601283D0

公开(公告)日：1996-04-03

申请号：SE9601283

申请日：1996-04-03

Applicant: MOTOROLA INC

Inventor： PROCTER LEE MICHAEL ,  ASHLEY JAMES PATRICK

IPC: H04J3/16 ,  H04W76/00 ,  H04B

Abstract: Signaling is inserted (102) into a communication channel of a communication system by inserting the signaling into the communication channel if the communication channel has sufficient available bandwidth (104). If the communication channel does not have sufficient available bandwidth, reducing the bandwidth of information being communicated on the communication channel (106) and inserting the signaling into the communication channel (108) with reduced information bandwidth.

公开(公告)号：AT471649T

公开(公告)日：2010-07-15

申请号：AT06000464

申请日：1999-07-23

Applicant: MOTOROLA INC

Inventor： BROPHY JOHN DOUGLAS ,  PROCTOR LEE MICHAEL ,  ASHLEY JAMES PATRICK

IPC: G10L19/00 ,  H04W88/18 ,  H04B7/26 ,  H04M1/00 ,  H04M3/00 ,  H04M7/00 ,  H04Q11/04

Abstract: Vocoder bypass is provided using in-band signaling. In preferred embodiments of the present invention, three signaling channels are arranged for transmission within the compressed speech. Each of the signaling channels are communicated at a preferred rate to permit fast, reliable detection of conditions indicating vocoder bypass mode of operation, to negotiate suitable vocoder type if necessary, and to synchronize and communicate compressed speech in a vocoder bypass mode of operation.

公开(公告)号：DE69935989T2

公开(公告)日：2007-09-20

申请号：DE69935989

申请日：1999-07-23

Applicant: MOTOROLA INC

Inventor： BROPHY JOHN DOUGLAS ,  ASHLEY JAMES PATRICK ,  PROCTOR LEE MICHAEL

IPC: G10L19/00 ,  H04B7/26 ,  H04M1/00 ,  H04M3/00 ,  H04M7/00 ,  H04Q11/04 ,  H04W88/18

Abstract: Vocoder bypass is provided using in-band signaling. In preferred embodiments of the present invention, three signaling channels are arranged for transmission within the compressed speech. Each of the signaling channels are communicated at a preferred rate to permit fast, reliable detection of conditions indicating vocoder bypass mode of operation, to negotiate suitable vocoder type if necessary, and to synchronize and communicate compressed speech in a vocoder bypass mode of operation.

公开(公告)号：AT361635T

公开(公告)日：2007-05-15

申请号：AT99935888

申请日：1999-07-23

Applicant: MOTOROLA INC

Inventor： BROPHY JOHN DOUGLAS ,  ASHLEY JAMES PATRICK ,  PROCTOR LEE MICHAEL

IPC: G10L19/00 ,  H04B7/26 ,  H04M1/00 ,  H04M3/00 ,  H04M7/00 ,  H04Q11/04 ,  H04W88/18 ,  H04Q7/00 ,  H04Q7/30

Abstract: Vocoder bypass is provided using in-band signaling. In preferred embodiments of the present invention, three signaling channels are arranged for transmission within the compressed speech. Each of the signaling channels are communicated at a preferred rate to permit fast, reliable detection of conditions indicating vocoder bypass mode of operation, to negotiate suitable vocoder type if necessary, and to synchronize and communicate compressed speech in a vocoder bypass mode of operation.

公开(公告)号：SE515748C2

公开(公告)日：2001-10-01

申请号：SE9601283

申请日：1996-04-03

Applicant: MOTOROLA INC

Inventor： PROCTER LEE MICHAEL ,  ASHLEY JAMES PATRICK

IPC: H04J3/16 ,  H04W76/00

Abstract: Signaling is inserted (102) into a communication channel of a communication system by inserting the signaling into the communication channel if the communication channel has sufficient available bandwidth (104). If the communication channel does not have sufficient available bandwidth, reducing the bandwidth of information being communicated on the communication channel (106) and inserting the signaling into the communication channel (108) with reduced information bandwidth.

公开(公告)号：GB2298768B

公开(公告)日：1998-12-23

申请号：GB9604878

申请日：1995-05-26

Applicant: MOTOROLA INC

Inventor： ASHLEY JAMES PATRICK ,  PROCTOR LEE MICHAEL

IPC: H03H17/00 ,  H03H21/00 ,  H04B3/23

Abstract: A method and apparatus are provided for echo canceling which includes double-talk immunity. The echo canceller (15) according to the present invention includes a double-talk detector (17) which uses an adaptive double-talk detection threshold (214) and an accurate estimation of reference energy (106) to detect double-talk. The echo canceller further provides for correcting partial echo canceller adaptive filter vector divergence occurring prior to double-talk detection by maintaining and switching to an auxiliary echo canceller filter with known "good" filter coefficients (58, 60, 62).

公开(公告)号：PL318012A1

公开(公告)日：1997-05-12

申请号：PL31801296

申请日：1996-03-07

Applicant: MOTOROLA INC

Inventor： ASHLEY JAMES PATRICK ,  PENG WEIMIN ,  ZHANG PENG

IPC: G10L19/038 ,  H03M7/30 ,  G10L9/18

公开(公告)号：CA2167940A1

公开(公告)日：1996-01-15

申请号：CA2167940

申请日：1995-05-26

Applicant: MOTOROLA INC

Inventor： ASHLEY JAMES PATRICK ,  PROCTOR LEE MICHAEL

IPC: H03H21/00 ,  H03H17/00 ,  H04B3/23 ,  H04M3/18 ,  H04Q7/22

Abstract: A method and apparatus are provided for echo canceling which includes double-talk immunity. The echo canceller (15) according to the present invention includes a double-talk detector (17) which uses an adaptive doubletalk detection threshold (214) and an accurate estimation of reference energy (106) to detect double-talk. The echo canceller further provides for correcting partial echo canceller adaptive filter vector divergence occurring prior to double-talk detection by maintaining and switching to an auxiliary echo canceller filter with known "good" filter coefficients (58, 60, 62).