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    METHOD AND APPARATUS TO SUSPEND SPEECH
    1.
    发明申请
    METHOD AND APPARATUS TO SUSPEND SPEECH 审中-公开
    停播语音的方法和设备

    公开(公告)号：WO1991014309A1

    公开(公告)日：1991-09-19

    申请号：PCT/US1991000873

    申请日：1991-02-12

    Applicant: MOTOROLA, INC.

    Inventor： MOTOROLA, INC. ,  SCHORMAN, Eric, R. ,  LAIRD, Kevin, M.

    IPC: H03G03/20

    CPC classification number: H03G3/32

    Abstract: A communication device (10) comprises an input for receiving a first audio signal (12) and an input (36) for receiving a second audio signal. The communication device (10) also includes a circular buffer (34) for storing the output digital audio signal (12) and for producing an output audio signal (20). The communication device (10) determines whether at least a portion of the output audio signal (20) is present in the second audio signal. If such a portion is present, the communication device (10) subtracts the portion of the output audio signal (20) from the second audio signal, to produce a third audio signal (26). A threshold detector, responsive to the third audio signal, produces a first control signal, when the level of the third audio signal increases to at least a first predetermined level, and a second control signal, when the level of the third audio signal decreases to a value lower than a second predetermined level, where the second predetermined level is lower than the first predetermined level. Finally, a buffer control (22) causes the buffer (34) to suspend production of the output audio signal in response to the first control signal, and causes the buffer (34) to resume production of the audio signal (12), in response to the second control signal.

    AUTOMATIC LENGTH-REDUCING AUDIO DELAY LINE
    2.
    发明公开
    AUTOMATIC LENGTH-REDUCING AUDIO DELAY LINE 失效
    自动LÄNGEREDUZIERENDE延迟线。

    公开(公告)号：EP0551422A1

    公开(公告)日：1993-07-21

    申请号：EP91919362.0

    申请日：1991-10-01

    Applicant: MOTOROLA, INC.

    Inventor： SCHORMAN, Eric, R. ,  REED, John, D.

    IPC: G10L15 ,  G10L13 ,  G10L21 ,  H04B1 ,  H04B14 ,  H04L13

    CPC classification number: G10L21/04 ,  H04M2250/74

    Abstract: Système électronique et procédé éliminant sensiblement tout retard causé par le tamponnage d'un signal contenant des paroles. Le système électronique comprend un récepteur recevant des signaux (16), un tampon (26) couplé au récepteur, un élément de commande de tampon (28) couplé au tampon et une section sonore (32) servant à communiquer des signaux reçus à un auditeur. Le procédé comprend les étapes suivantes: le récepteur reçoit un signal d'entrée représentant des paroles et émet un signal de sortie représentant le signal d'entrée après un retard introduit exprès dans le système. Le retard correspond à la durée du tampon. Le tampon mémorise le signal d'entrée dans le tampon à une vitesse d'entrée et émet le signal de sortie à une vitesse de sortie. L'élément de commande de tampon détermine si le retard ou la durée du tampon est supérieure à un seuil prédéterminé et analyse au moins une partie du signal d'entrée mémorisé dans le tampon pour déterminer quelles parties du signal d'entrée peuvent être enlevées sans qu'il se produise une détérioration sensible de la qualité du signal, lorsque la durée du tampon est supérieure à une durée prédéterminée. L'élément de commande de tampon efface alors au moins quelques-unes des parties du signal d'entrée mémorisé dans le tampon qui correspondent au critère prédéterminé.

    AUTOMATIC LENGTH-REDUCING AUDIO DELAY LINE
    6.
    发明申请
    AUTOMATIC LENGTH-REDUCING AUDIO DELAY LINE 审中-公开
    自动长度减少音频延时线

    公开(公告)号：WO1992006467A1

    公开(公告)日：1992-04-16

    申请号：PCT/US1991007215

    申请日：1991-10-01

    Applicant: MOTOROLA, INC.

    Inventor： MOTOROLA, INC. ,  SCHORMAN, Eric, R. ,  REED, John, D.

    IPC: G10L05/00

    CPC classification number: G10L21/04 ,  H04M2250/74

    Abstract: An electronic system and a method substantially eliminates any delays caused by buffering of a signal containing speech. The electronic system comprises a receiver for receiving signals (16), a buffer (26), coupled to the receiver, a buffer controller (28) coupled to the buffer, and an audio section (32) for presenting signals received to a listener. The method comprises the following steps. The receiver receives an input signal representing speech, and produces an output signal representing the input signal after a delay intentionally introduced in the system. The delay corresponds to the length of the buffer. The buffer stores the input signal in the buffer at an input rate, and produces the output signal at an output rate. The buffer controller determines whether the delay or buffer length is greater than a predetermined threshold, and analyzes at least a portion of the input signal stored in the buffer to determine which parts of the input signal may be removed without substantial deterioration of the signal quality according to at least one predetermined criterion, when the buffer length is greater than a predetermined length. The buffer controller then deletes at least some of the parts of the input signal stored in the buffer that comply with the predetermined criterion.

    METHOD AND APPARATUS FOR HANDOFF WITHIN A COMMUNICATION SYSTEM
    9.
    发明公开
    METHOD AND APPARATUS FOR HANDOFF WITHIN A COMMUNICATION SYSTEM 审中-公开
    方法和装置NEXT RICH内的通信系统

    公开(公告)号：EP1029422A1

    公开(公告)日：2000-08-23

    申请号：EP98953978.8

    申请日：1998-10-27

    Applicant: MOTOROLA, INC.

    Inventor： SCHORMAN, Eric, R. ,  KOTZIN, Michael, D.

    IPC: H04Q7/32 ,  H04K1/10 ,  H04K1/00

    CPC classification number: H04W36/0088 ,  H04W56/005

    Abstract: In a communication system (100) where a remote unit is given a time offset for a base station (102) and hands off to the base station (102) if the remote unit (113) can acquire the base station within a time window surrounding the time offset, a remote unit (113) utilizes the time offset of each base station (supplied by a serving base station (101) via downlink communication signal (116)) and searches for neighboring base stations within the time window surrounding its PN offset. The time window surrounding an individual base station's PN offset is allowed to vary depending upon whether the communication system (100) is time synchronized. In particular, a base station (101) supplies the remote unit (113) with an indication that the communication system (100) is operating in a synchronized or an unsynchronized mode, and the remote unit (113) varies the time window (search window) accordingly.

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