公开(公告)号：WO1997008844A1

公开(公告)日：1997-03-06

申请号：PCT/US1996010762

申请日：1996-06-24

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  LI, Xiaojun ,  SATYAMURTI, Sunil ,  D'AMICO, Thomas, V.

IPC: H04B01/46

CPC classification number: H04B1/1081 ,  H03G3/005 ,  H04B1/1027

Abstract: A method and apparatus for mitigating effects of multipath fading, interference, and noise in a single sideband (SSB) signal transmitted by a radio communication system and demodulated by a portable subscriber unit (122) utilizing a demodulator (304) compensated by a pilot signal power (406). The apparatus performs the mitigation process by calculating (708) a pilot fading threshold in addition to a muting threshold. When samples of the mean pilot signal power fall below the fading threshold, the compensation of the demodulated signal is adjusted (714). In addition, when the mean analog message signal power falls below the muting threshold, the samples included in the predetermined portion of the message are muted (718).

Abstract translation: 一种用于减轻由无线电通信系统发射并由便携式用户单元（122）利用由导频信号补偿的解调器（304）解调的单边带（SSB）信号中的多径衰落，干扰和噪声的影响的方法和装置 动力（406）。 除了静音阈值之外，还通过计算（708）导频衰落阈值来执行缓解处理。 当平均导频信号功率的采样低于衰落阈值时，调整解调信号的补偿（714）。 此外，当平均模拟消息信号功率低于静默阈值时，包含在消息的预定部分中的样本被静音（718）。

公开(公告)号：WO1997001939A1

公开(公告)日：1997-01-16

申请号：PCT/US1996004395

申请日：1996-03-29

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  SATYAMURTI, Sunil ,  SIBECAS, Salvador

IPC: H04Q07/06

CPC classification number: H04W88/185 ,  G10L21/04

Abstract: A method and apparatus (206) for time-scale modification of an input signal comprises the steps and a device that performs the steps of digitizing the input signal for analysis, storing the input signal in a memory and then dividing the input signal into time frames (250). The method and device then determines a difference in the short-term frequency spectrum between adjacent time frames (252 and 254) to provide a first speed factor (S1) and the input signal is time-scaled (208) in accordance with the first speed factor. Optionally, a second speed factor (S2) can be determined from the percentage of silence (262) observed within the input signal and the input signal can then be time-scaled in accordance with the first and second speed factors to provide a given quality of reconstructed speech.

Abstract translation: 一种用于对输入信号进行时间尺度修改的方法和装置（206）包括以下步骤和一个装置，其执行将输入信号数字化以进行分析的步骤，将输入信号存储在存储器中，然后将输入信号划分成时间帧 （250）。 然后，该方法和设备确定相邻时间帧（252和254）之间的短期频谱的差异，以提供第一速度因子（S1），并且输入信号根据第一速度（208）进行时间缩放（208） 因子。 可选地，可以根据在输入信号内观察到的静音百分比（262）来确定第二速度因子（S2），然后可以根据第一和第二速度因子对输入信号进行时间缩放，以提供给定的质量 重建语音

公开(公告)号：EP0882337A1

公开(公告)日：1998-12-09

申请号：EP96903454.0

申请日：1996-01-11

Applicant: MOTOROLA, INC.

Inventor： SIWIAK, Kazimierz ,  SATYAMURTI, Sunil ,  KUZNICKI, William, Joseph

IPC: H04H1 ,  H04Q7 ,  G10L21 ,  H04H20 ,  H04K1 ,  H04L27 ,  H04B1

CPC classification number: H04L27/34 ,  H04B1/406

Abstract: A modulation scheme (600) useful in a voice paging system in which both of two orthogonal modulation components (500 and 510) are used to carry two halves of a single voice message destined for a receiver, or two separate voice messages for a receiver. The single voice message is transmitted in half the time.

公开(公告)号：EP0870299A1

公开(公告)日：1998-10-14

申请号：EP96903611.0

申请日：1996-01-26

Applicant: MOTOROLA, INC.

Inventor： SATYAMURTI, Sunil ,  LEITCH, Clifford, Dana ,  SCHWENDEMAN, Robert, John ,  SIWIAK, Kazimierz ,  KUZNICKI, William, Joseph

IPC: G10L11 ,  G10L19 ,  G10L21 ,  H04Q7

CPC classification number: G10L21/04 ,  G10L25/90

Abstract: A method for time-scale modification of speech using a modified version of the Waveform Similarity based Overlap-Add technique (WSOLA) comprises the steps of storing a portion of an input speech signal in a memory, analysing the portion of the input speech signal providing an estimated pitch value (12), determining a segment size (14) in response to the estimated pitch value and time-scaling (18) the input speech signal for a given time-scaling factor and in response to the determined segment size.

公开(公告)号：EP1121764A1

公开(公告)日：2001-08-08

申请号：EP99948239.1

申请日：1999-09-15

Applicant: MOTOROLA, INC.

Inventor： TAUBENHEIM, David, B. ,  BOUDREUX, Miriam, R. ,  SATYAMURTI, Sunil

IPC: H04B1/66 ,  G10L3/02

CPC classification number: G10L19/087 ,  G10L19/07

Abstract: A method (100) of compressing a digital signal that is parametrically modeled and encoded includes the steps of storing (102) the digital signal in a memory in a plurality of frames having a plurality of parameters in each frame of the plurality of frames, wherein the digital signal was encoded at a higher rate and converting the digital signal to a lower rate by selecting (106) from each frame of the plurality of frames a subset of the plurality of parameters and discarding (108) the subset of the plurality of parameters within each frame of the plurality of frames.

公开(公告)号：WO1997007636A2

公开(公告)日：1997-02-27

申请号：PCT/US1996010529

申请日：1996-06-17

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  GORDAY, Paul, Edward ,  GORDAY, Xuan-Khanh, Tran ,  SATYAMURTI, Sunil

IPC: H04Q00/00

CPC classification number: H04W88/185

Abstract: A method and apparatus is for use in a radio communication system (100) for delivering a message from a system controller (102) to a selective call device. In the system controller (102) the method includes the steps of generating a first message intended for the selective call device (106), changing a delivery state of the first message to undelivered after the first message has been transmitted at least once from the system controller (102), and storing the first message in the system controller (102) when the delivery state is changed to undelivered. In the selective call device the method includes the steps of determining that the first message is stored in the system controller (102) and presenting user with information which indicates that an undeliverable message is being stored by the system controller (102) in response to determining that the first message (102) is stored in the system controller (102).

Abstract translation: 一种用于无线电通信系统（100）中的方法和装置，用于将消息从系统控制器（102）传送到选择性呼叫装置。 在所述系统控制器（102）中，所述方法包括以下步骤：产生用于所述选择性呼叫设备（106）的第一消息，在所述第一消息已经从所述系统发送至少一次之后，将所述第一消息的传送状态改变为未传送 控制器（102），并且当传送状态改变为未传送时，将第一消息存储在系统控制器（102）中。 在选择性呼叫设备中，该方法包括以下步骤：响应于确定，确定第一消息被存储在系统控制器（102）中并且向用户呈现指示系统控制器（102）正在存储不可递送消息的信息 第一消息（102）被存储在系统控制器（102）中。

公开(公告)号：WO1996027249A1

公开(公告)日：1996-09-06

申请号：PCT/US1996000095

申请日：1996-01-11

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  LEITCH, Clifford, Dana ,  SCHWENDEMAN, Robert, John ,  SIWIAK, Kazimierz ,  KUZNICKI, William, Joseph ,  SATYAMURTI, Sunil

IPC: H04J01/14

CPC classification number: H04B1/662 ,  G10L19/00

Abstract: The present invention comprises a method for compressing a plurality of voice signals within a voice communication resource (see Fig. 6) having a given bandwidth within a voice communication system. The method comprises the steps of subchanneling the voice communication resource (441, 442, 443) while placing at least one of each of the plurality of voice signals on a subchannel and time-scaling (18) each of the voice signals within each of the subchannels, wherein these steps provide a compressed voice signal.

Abstract translation: 本发明包括一种用于在语音通信系统内具有给定带宽的语音通信资源（见图6）内压缩多个语音信号的方法。 该方法包括以下步骤：将多个语音信号中的每一个中的至少一个放置在子信道上，并且每个语音信号中的每个语音信号中的每个语音信号的时间缩放（18）来对语音通信资源进行子信道化（441,442,443） 子信道，其中这些步骤提供压缩语音信号。

公开(公告)号：WO1996027248A1

公开(公告)日：1996-09-06

申请号：PCT/US1996000410

申请日：1996-01-11

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  SIWIAK, Kazimierz ,  SATYAMURTI, Sunil ,  KUZNICKI, William, Joseph

IPC: H04H05/00

CPC classification number: H04L27/34 ,  H04B1/406

Abstract: A modulation scheme (600) useful in a voice paging system in which both of two orthogonal modulation components (500 and 510) are used to carry two halves of a single voice message destined for a receiver, or two separate voice messages for a receiver. The single voice message is transmitted in half the time.

Abstract translation: 一种在语音寻呼系统中有用的调制方案（600），其中两个正交调制分量（500和510）都用于承载去往接收机的单个语音消息的两半，或者用于接收机的两个单独的语音消息。 单个语音消息在一半时间内传输。

公开(公告)号：WO1996027184A1

公开(公告)日：1996-09-06

申请号：PCT/US1996000838

申请日：1996-01-26

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  SATYAMURTI, Sunil ,  LEITCH, Clifford, Dana ,  SCHWENDEMAN, Robert, John ,  SIWIAK, Kazimierz ,  KUZNICKI, William, Joseph

IPC: G10L05/06

CPC classification number: G10L21/04 ,  G10L25/90

Abstract: A method for time-scale modification of speech using a modified version of the Waveform Similarity based Overlap-Add technique (WSOLA) comprises the steps of storing a portion of an input speech signal in a memory, analysing the portion of the input speech signal providing an estimated pitch value (12), determining a segment size (14) in response to the estimated pitch value and time-scaling (18) the input speech signal for a given time-scaling factor and in response to the determined segment size.

Abstract translation: 使用基于波形相似性的重叠添加技术（WSOLA）的修改版本对语音进行时间尺度修改的方法包括以下步骤：将输入语音信号的一部分存储在存储器中，分析输入语音信号的部分提供 估计的音调值（12），响应于所估计的音调值和给定时间缩放因子的时间缩放（18）输入语音信号，以及响应于所确定的片段大小，确定片段大小（14）。