公开(公告)号：EP0496829A4

公开(公告)日：1993-08-18

申请号：EP90916987

申请日：1990-09-17

申请人： MOTOROLA, INC.

发明人： GERSON, IRA, ALAN ,  JASIUK, MARK, ANTONI

IPC分类号： G10L19/26 ,  G10L5/00

CPC分类号： G10L19/26

摘要： A linear predictive coding speech synthetizer wherein an excitation signal that includes pitch information is filtered in a pitch enhancement filter (201) prior to provision of the excitation signal to an LPC filter (106). In one embodiment, the speech synthesizer is configured in a radio.

公开(公告)号：EP0380563A4

公开(公告)日：1991-04-03

申请号：EP88908903

申请日：1988-09-22

申请人： MOTOROLA, INC.

发明人： VILMUR, RICHARD, JOSEPH ,  BARLO, JOSEPH, JOHN ,  GERSON, IRA, ALAN ,  LINDSLEY, BRETT, LOUIS

IPC分类号： H01B1/10 ,  G10L11/02 ,  G10L11/06 ,  G10L21/02 ,  H01B15/00 ,  H04B1/10 ,  H04B15/00

CPC分类号： G10L21/0208 ,  G10L2021/02085 ,  G10L2021/02168 ,  G10L2025/786 ,  G10L2025/937

公开(公告)号：EP0484339A4

公开(公告)日：1993-05-05

申请号：EP90908908

申请日：1990-05-02

申请人： MOTOROLA, INC.

发明人： GERSON, IRA, ALAN

IPC分类号： G10L19/12 ,  G10L5/00

CPC分类号： G10L19/12

摘要： In a vector excitation source digital speech coder utilizing vector excitation, candidate excitation sources (111, 121) are considered independent of certain pitch parameters. Once a particular excitation source has been selected, the excluded pitch parameter may then be optimized, resulting in an overall improvement in speech quality.

公开(公告)号：EP0389514A4

公开(公告)日：1992-05-20

申请号：EP88909654

申请日：1988-08-24

申请人： MOTOROLA, INC.

发明人： GERSON, IRA, ALAN ,  LINDSLEY, BRETT, LOUIS

IPC分类号： G10L11/00 ,  G10L15/00 ,  G10L15/10 ,  G10L15/22 ,  H04M1/27 ,  G10L5/06 ,  G10L7/08 ,  G10L9/06

CPC分类号： H04M1/271 ,  G10L15/22

公开(公告)号：EP0393059A4

公开(公告)日：1990-12-12

申请号：EP88908527

申请日：1988-08-24

申请人： MOTOROLA, INC.

发明人： GERSON, IRA, ALAN ,  LINDSLEY, BRETT, LOUIS

IPC分类号： G10L15/28 ,  G10L15/00 ,  G10L15/22 ,  H04M1/00 ,  H04M1/27 ,  H04M1/60 ,  H04M9/08 ,  H04Q7/38 ,  H04B1/46 ,  G10L9/06

CPC分类号： H04M9/08 ,  G10L15/22 ,  H04M1/271

摘要： A reliable method for terminating a telephone call is disclosed using a specific sequence of steps performed by hands-free control system. The invention requires that the call terminating command sequence be recognized as: two separate speech utterances (e.g., TERMINATE (158) and CONVERSATION (158)); in proper sequence (e.g. TERMINATE first, then CONVERSATION) with a maximum pause time interval (124) between the end of the first utterance and the start of the second utterance (e.g., 300 milliseconds) and which meet predefined speech recognition matching criteria (110). Moreover, the present invention provides the user with a procedure to continue the telephone call in progress should the speech recognizer make a false recognition or if the user did not intend to speak the proper command. As a result, present invention enables a user to disconnect a telephone call by voice command with a high degree of reliability, even under high ambient noise conditions.