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    2.
    发明专利
    未知

    公开(公告)号：DE3855164D1

    公开(公告)日：1996-05-02

    申请号：DE3855164

    申请日：1988-08-24

    Applicant: MOTOROLA INC

    Inventor： GERSON IRA ,  LINDSLEY BRETT

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

    Abstract: A user-interactive speech recognition control system is disclosed for recognizing a complete sequence of keywords (e.g., a telephone number such as 123-4567) via entering, verifying, and editing variable-length utterance strings (e.g., 1-2-3; 4-5; 6-7) separated by the user-defined placement of pauses. The device controller (120) utilizes timers (124) to monitor the pause time between partial-sequence digit strings recognized by the speech recognizer (110). When a string of digits is followed by a predetermined pause time interval, the recognized digits will be replied via the speech synthesizer (130). An additional string of digits can then be entered, and only the subsequent string will be replied after the next pause. Furthermore, the user has the flexibility to correct only the last digit string entered, or the entire sequence. Hence, if there is an error in only one digit, the erroneous digit string can be corrected without having to re-enter the entire digit sequence. The invention is well-suited to be used in a hands-free voice command dialing system for a mobile radiotelephone, wherein vehicular background noise may affect recognition accuracy.

    4.
    发明专利
    未知

    公开(公告)号：DE3855164T2

    公开(公告)日：1996-10-10

    申请号：DE3855164

    申请日：1988-08-24

    Applicant: MOTOROLA INC

    Inventor： GERSON IRA ,  LINDSLEY BRETT

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

    Abstract: A user-interactive speech recognition control system is disclosed for recognizing a complete sequence of keywords (e.g., a telephone number such as 123-4567) via entering, verifying, and editing variable-length utterance strings (e.g., 1-2-3; 4-5; 6-7) separated by the user-defined placement of pauses. The device controller (120) utilizes timers (124) to monitor the pause time between partial-sequence digit strings recognized by the speech recognizer (110). When a string of digits is followed by a predetermined pause time interval, the recognized digits will be replied via the speech synthesizer (130). An additional string of digits can then be entered, and only the subsequent string will be replied after the next pause. Furthermore, the user has the flexibility to correct only the last digit string entered, or the entire sequence. Hence, if there is an error in only one digit, the erroneous digit string can be corrected without having to re-enter the entire digit sequence. The invention is well-suited to be used in a hands-free voice command dialing system for a mobile radiotelephone, wherein vehicular background noise may affect recognition accuracy.

    6.
    发明专利
    未知

    公开(公告)号：DE69031215T2

    公开(公告)日：1998-02-19

    申请号：DE69031215

    申请日：1990-11-13

    Applicant: MOTOROLA INC

    Inventor： LINDSLEY BRETT

    IPC: G06F7/38 ,  G06F7/552

    Abstract: A method and apparatus is disclosed that utilizes ''Lindsley's Law'', a polynomial convergence algorithm, suitable even for high convergence rates, to implement more efficient reciprocal j root, and hence, j root itself, computations of desired inputs. The invention emphasizes multiplication (114, 116, 118, 120), instead of addition, as the iterative operator, thereby reducing error at a rate relative to a power of a selected convergence rate.

    8.
    发明专利
    未知

    公开(公告)号：DE3856280T2

    公开(公告)日：1999-08-12

    申请号：DE3856280

    申请日：1988-09-22

    Applicant: MOTOROLA INC

    Inventor： VILMUR RICHARD ,  BARLO JOSEPH ,  GERSON IRA ,  LINDSLEY BRETT

    IPC: H01B1/10 ,  G10L11/02 ,  G10L21/02 ,  G10L25/93 ,  H01B15/00 ,  H04B1/10 ,  H04B15/00

    Abstract: An improved noise suppression system (800) is disclosed which performs speech quality enhancement upon the speech-plus-noise signal available at the input (205) to generate a clean speech signal at the output (265) by spectral gain modification. The improvements of the present invention include the addition of a signal-to-noise ratio (SNR) threshold mechanism (830) to reduce background noise flutter by offsetting the gain rise of the gain tables until a certain SNR threshold is reached, the use of a voice metric calculator (810) to produce more accurate background noise estimates via performing the update decision based on the overall voice-like characteristics in the channels and the time interval since the last update, and the use of a channel SNR modifier (820) to provide immunity to narrowband noise bursts through modification of the SNR estimates based on the voice metric calculation and the channel energies.

    9.
    发明专利
    未知

    公开(公告)号：DE3856280D1

    公开(公告)日：1999-01-21

    申请号：DE3856280

    申请日：1988-09-22

    Applicant: MOTOROLA INC

    Inventor： VILMUR RICHARD ,  BARLO JOSEPH ,  GERSON IRA ,  LINDSLEY BRETT

    IPC: H01B1/10 ,  G10L11/02 ,  G10L21/02 ,  G10L25/93 ,  H01B15/00 ,  H04B1/10 ,  H04B15/00

    Abstract: An improved noise suppression system (800) is disclosed which performs speech quality enhancement upon the speech-plus-noise signal available at the input (205) to generate a clean speech signal at the output (265) by spectral gain modification. The improvements of the present invention include the addition of a signal-to-noise ratio (SNR) threshold mechanism (830) to reduce background noise flutter by offsetting the gain rise of the gain tables until a certain SNR threshold is reached, the use of a voice metric calculator (810) to produce more accurate background noise estimates via performing the update decision based on the overall voice-like characteristics in the channels and the time interval since the last update, and the use of a channel SNR modifier (820) to provide immunity to narrowband noise bursts through modification of the SNR estimates based on the voice metric calculation and the channel energies.

    10.
    发明专利
    未知

    公开(公告)号：DE69031215D1

    公开(公告)日：1997-09-11

    申请号：DE69031215

    申请日：1990-11-13

    Applicant: MOTOROLA INC

    Inventor： LINDSLEY BRETT

    IPC: G06F7/38 ,  G06F7/552

    Abstract: A method and apparatus is disclosed that utilizes ''Lindsley's Law'', a polynomial convergence algorithm, suitable even for high convergence rates, to implement more efficient reciprocal j root, and hence, j root itself, computations of desired inputs. The invention emphasizes multiplication (114, 116, 118, 120), instead of addition, as the iterative operator, thereby reducing error at a rate relative to a power of a selected convergence rate.

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