公开(公告)号：WO1993013516A1

公开(公告)日：1993-07-08

申请号：PCT/US1992009721

申请日：1992-11-12

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  HONG, Daehyoung ,  CARLONE, Douglas, A.

IPC: G10L03/00

CPC classification number: G10L25/78

Abstract: Variable hangover time is provided for a speech coder (105). Voice activity within a speech message is detected (209) using a voice activity detector (VAD) (107), and a signal-to-noise ratio is calculated. A variable hangover time is calculated (215) and appended to the time in which voice activity is detected, producing an extended voice detection period. The speech coder (105) is enabled only during the extended voice detection period, thus saving power.

Abstract translation: 为语音编码器（105）提供可变宿醉时间。 使用语音活动检测器（VAD）（107）检测语音消息内的语音活动（209），并且计算信噪比。 计算可变宿醉时间（215）并附加到检测到语音活动的时间，产生扩展的语音检测周期。 语音编码器（105）仅在扩展语音检测周期期间被使能，从而节省功率。

公开(公告)号：WO1991006944A1

公开(公告)日：1991-05-16

申请号：PCT/US1990005884

申请日：1990-10-15

Applicant: MOTOROLA, INC.

Inventor： MOTOROLA, INC. ,  POULIN, Mark, Richard ,  HONG, Daehyoung ,  VAN DEN HEUVEL, Anthony, P.

IPC: G10L07/02

CPC classification number: G10L19/20

Abstract: A time waveform compressor (200) is provided that performs one of three possible operations on a given segment of an input speech waveform (201). The decision logic (235) uses the pitch value (223), periodicity value (233) and silence value (227) to control the switch (209). Depending on the switch's (209) location (A, B or C), the stored signal (203) is applied to either a Time Domain Harmonic Scaling Compressor (212), a short circuit (213), or an open circuit (215). The ouptut of the compressor (219) is a continuous compressed speech waveform that can be sent to the speech coder.

Abstract translation: 提供时间波形压缩器（200），其对输入语音波形（201）的给定段执行三种可能的操作之一。 决定逻辑（235）使用音调值（223），周期值（233）和静音值（227）来控制开关（209）。 根据开关（209）的位置（A，B或C），所存储的信号（203）被应用于时域谐波缩放压缩器（212），短路（213）或开路（215） 。 压缩机（219）的发射是可以发送到语音编码器的连续压缩语音波形。

公开(公告)号：EP0454776B1

公开(公告)日：1996-03-27

申请号：EP90902743.5

申请日：1989-12-21

Applicant: MOTOROLA, INC.

Inventor： KOTZIN, Michael Dale ,  CRISLER, Kenneth J. ,  MOHL, Lawrence M. ,  SALTZBERG, Theodore ,  HONG, Daehyoung ,  VAN DEN HEUVEL, Anthony Patrick

IPC: H04J3/16 ,  H04J3/12 ,  H04J4/00 ,  H04Q7/20

CPC classification number: H04J3/1647 ,  H04J4/00

Abstract: A communication system (Figure 2) that provides TDM and FDM communications between communication units (104). At least two control slots (403) are provided in each TDM frame window (Figure 4) to provide communication control information such as channel assignment information.

公开(公告)号：EP0454776A1

公开(公告)日：1991-11-06

申请号：EP90902743.0

申请日：1989-12-21

Applicant: MOTOROLA, INC.

Inventor： KOTZIN, Michael Dale ,  CRISLER, Kenneth J. ,  MOHL, Lawrence M. ,  SALTZBERG, Theodore ,  HONG, Daehyoung ,  VAN DEN HEUVEL, Anthony Patrick

IPC: H04J3 ,  H04J4 ,  H04Q7

CPC classification number: H04J3/1647 ,  H04J4/00

Abstract: Un système de communication permet des communications par multiplexage temporel et multiplexage en fréquence entre des unités de communication (104). Au moins deux tranches de gestion (403) sont prévues dans chaque fenêtre de séquence de multiplexage temporel (Figure 4) pour permettre la transmission d'informations de gestion de communications relatives par exemple à l'affectation des canaux.

公开(公告)号：WO1994027390A1

公开(公告)日：1994-11-24

申请号：PCT/US1994004110

申请日：1994-04-14

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  CRISLER, Kenneth, James ,  STURGILL, Robert, Martin ,  JASPER, Steven, Charles ,  EMEOTT, Stephen, Paul ,  MARTURANO, Lawrence, Joseph ,  HONG, Daehyoung

IPC: H04L05/12

CPC classification number: H03M13/256 ,  H03M13/25 ,  H04L27/3433

Abstract: A method and system (300) for encoding data comprising a variable rate trellis coder (302) which receives a plurality of discrete data elements - e.g., input bits - and trellis encodes the information pursuant to a known set of coding rules, producing a plurality of trellis encoded symbols (303). Further, another variable input is used by the trellis coder (302) to determine the coding rate - i.e., symbols (303) are encoded and outputted to a dimensional formatter (306) at a rate which is determined by a rate control signal (305) as output by the variable rate controller (304). The dimensional formatter (306) acts in response to input from the variable rate controller (304), providing formatted symbols (308) to a modulator (310). The modulator (310), which in a preferred embodiment is a QAM modulator, is used to modulate the information signal onto a carrier signal for transmission over the communication channel.

Abstract translation: 一种用于对包含可变速率网格编码器（302）的数据进行编码的方法和系统（300），该可变速率网格编码器（302）接收多个离散数据元素（例如，输入比特），并根据一组已知的编码规则对该信息进行网格编码，从而产生多个 的网格编码符号（303）。 此外，网格编码器（302）使用另一个可变输入来确定编码速率 - 即符号（303）被编码并以速率控制信号（305）确定的速率输出到维格式化器（306） ）作为可变速率控制器（304）的输出。 尺寸格式器（306）响应于来自可变速率控制器（304）的输入而起作用，向调制器（310）提供格式化的符号（308）。 在优选实施例中，调制器（310）是QAM调制器，用于将信息信号调制到载波信号上，以在通信信道上传输。

公开(公告)号：WO1990008434A1

公开(公告)日：1990-07-26

申请号：PCT/US1989005686

申请日：1989-12-21

Applicant: MOTOROLA, INC.

Inventor： MOTOROLA, INC. ,  KOTZIN, Michael, Dale ,  CRISLER, Kenneth, J. ,  MOHL, Lawrence, M. ,  SALTZBERG, Theodore ,  HONG, Daehyoung ,  VAN DEN HEUVEL, Anthony, Patrick

IPC: H04J03/16

CPC classification number: H04J3/1647 ,  H04J4/00

Abstract: A communication system (Figure 2) that provides TDM and FDM communications between communication units (104). At least two control slots (403) are provided in each TDM frame window (Figure 4) to provide communication control information such as channel assignment information.