公开(公告)号：US20100257431A1

公开(公告)日：2010-10-07

申请号：US12797923

申请日：2010-06-10

申请人： Eiji Shinsho ,  Shigeo Sato

发明人： Eiji Shinsho ,  Shigeo Sato

IPC分类号： H03M13/00

CPC分类号： G10L19/04

摘要： A prediction signal calculator with a limit function is provided with a multiplier calculating a partial prediction signal composed of the product of a polar prediction coefficient for generating a regenerative signal and a quantized regenerative signal, a display conversion section for converting the partial prediction signal from floating point representation to an absolute value display, and a limiter executing processing for substituting limit values in the partial prediction signal satisfying overflow conditions during conversion of the partial prediction signal from floating point representation to an absolute value display in the event that the error detector determines that there are code errors in the audio data for a predetermined number of frames of the audio data.

摘要翻译： 具有极限功能的预测信号计算器具有乘法器，该乘法器计算由用于产生再生信号的极性预测系数和量化再生信号的乘积组成的部分预测信号，显示转换部分，用于将来自浮动的部分预测信号 以及限制器执行处理，用于在部分预测信号从浮点表示到绝对值显示的转换期间将满足溢出条件的部分预测信号中的极限值替换为误差检测器确定该绝对值显示 对于音频数据的预定数量的帧，音频数据中存在代码错误。

公开(公告)号：US07747928B2

公开(公告)日：2010-06-29

申请号：US11611127

申请日：2006-12-14

申请人： Eiji Shinsho ,  Shigeo Sato

发明人： Eiji Shinsho ,  Shigeo Sato

IPC分类号： H03M13/00

CPC分类号： G10L19/04

摘要： A prediction signal calculator with a limit function is provided with a multiplier calculating a partial prediction signal composed of the product of a polar prediction coefficient for generating a regenerative signal and a quantized regenerative signal, a display conversion section for converting the partial prediction signal from floating point representation to an absolute value display, and a limiter executing processing for substituting limit values in the partial prediction signal satisfying overflow conditions during conversion of the partial prediction signal from floating point representation to an absolute value display in the event that the error detector determines that there are code errors in the audio data for a predetermined number of frames of the audio data.

摘要翻译： 具有极限功能的预测信号计算器具有乘法器，该乘法器计算由用于产生再生信号的极性预测系数和量化再生信号的乘积组成的部分预测信号，显示转换部分，用于将来自浮动的部分预测信号 以及限制器执行处理，用于在部分预测信号从浮点表示到绝对值显示的转换期间将满足溢出条件的部分预测信号中的极限值替换为误差检测器确定该绝对值显示 对于音频数据的预定数量的帧，音频数据中存在代码错误。

公开(公告)号：US20080015849A1

公开(公告)日：2008-01-17

申请号：US11611127

申请日：2006-12-14

申请人： Eiji Shinsho ,  Shigeo Sato

发明人： Eiji Shinsho ,  Shigeo Sato

IPC分类号： G10L19/00

CPC分类号： G10L19/04

摘要： A prediction signal calculator with a limit function is provided with a multiplier calculating a partial prediction signal composed of the product of a polar prediction coefficient for generating a regenerative signal and a quantized regenerative signal, a display conversion section for converting the partial prediction signal from floating point representation to an absolute value display, and a limiter executing processing for substituting limit values in the partial prediction signal satisfying overflow conditions during conversion of the partial prediction signal from floating point representation to an absolute value display in the event that the error detector determines that there are code errors in the audio data for a predetermined number of frames of the audio data.

摘要翻译： 具有极限功能的预测信号计算器具有乘法器，该乘法器计算由用于产生再生信号的极性预测系数和量化再生信号的乘积组成的部分预测信号，显示转换部分，用于将来自浮动的部分预测信号 以及限制器执行处理，用于在部分预测信号从浮点表示到绝对值显示的转换期间将满足溢出条件的部分预测信号中的极限值替换为误差检测器确定该绝对值显示 对于音频数据的预定数量的帧，音频数据中存在代码错误。

公开(公告)号：US07221661B2

公开(公告)日：2007-05-22

申请号：US10209908

申请日：2002-08-02

申请人： Masaki Matsui ,  Eiji Shinsho ,  Minoru Ogino ,  Shigeo Sato

发明人： Masaki Matsui ,  Eiji Shinsho ,  Minoru Ogino ,  Shigeo Sato

IPC分类号： H04B7/212

CPC分类号： H04B1/40 ,  H04W74/04

摘要： According to the present invention, all terminals can establish synchronization in a radio communications system formed only of a plurality of mobile terminals. This radio terminal communicates by the time division connection method, and comprises a control portion for synchronizing its transmission/reception timing to that of a group including a plurality of radio terminals. The control portion determines the overall cycle including basic cycles in a number corresponding to the number of radio terminals within said group, conducts control to transmit a signal in a basic cycle that is included in said overall cycle and that is set by a unique terminal number allotted in advance to each of said radio terminals, conducts control to receive signals from another radio terminal in another basic cycle, adjusts the transmission/reception timing based on the data received from said other radio terminal in said other basic cycle, and saves the reception timing until a process to adjust the transmission/reception timing is conducted.

摘要翻译： 根据本发明，所有终端都可以在仅由多个移动终端形成的无线电通信系统中建立同步。 该无线终端通过时分连接方式通信，并且包括用于将其发送/接收定时与包括多个无线终端的组的发送/接收定时同步的控制部分。 控制部分确定整个周期，包括对应于所述组内的无线电终端数量的数量的基本周期，进行控制以发送包含在所述整个周期中的基本周期中的信号，并且由唯一终端号码 预先分配给每个所述无线电终端，进行控制以在另一个基本周期中从另一个无线电终端接收信号，基于在所述另一个基本周期中从所述另一个无线电终端接收的数据来调整发送/接收定时，并且保存接收 进行到调整发送/接收定时的处理的定时。

公开(公告)号：US06914940B2

公开(公告)日：2005-07-05

申请号：US09739266

申请日：2000-12-19

申请人： Masato Tanaka ,  Eiji Shinsho ,  Meizhong Wang ,  Yoshinori Shinohara ,  Kazuhiko Seki

发明人： Masato Tanaka ,  Eiji Shinsho ,  Meizhong Wang ,  Yoshinori Shinohara ,  Kazuhiko Seki

IPC分类号： G10L19/00 ,  G10L21/02 ,  H03M7/36 ,  H04B14/04 ,  H04B14/06 ,  H04B1/10

CPC分类号： H04B14/046 ,  H04B14/06

摘要： Provided is a device for improving voice signal in quality by discriminating a radio environment of a signal transmission path and detecting a click noise. The device for improving voice signal in quality calculates an average value for a short interval of a received ADPCM code, identifies from such average value the nature of a radio environment of a signal transmission path, and considers that a click noise is occurred when the average value exceeds a threshold value assigned radio environment. The present invention comprises a click noise detector (22) for outputting a click noise detecting signal, and a click noise suppressing circuit for suppressing the click noise by setting the velocity coefficient of an ADPCM decoder (21) as “0” for a frame in which a frame error detecting signal, which represents the detection of a frame error of the received ADPCM code, and a click noise detecting signal are both detected.

摘要翻译： 提供了一种通过识别信号传输路径的无线电环境并检测咔嗒声噪声来改善质量中的语音信号的装置。 用于改善质量的语音信号的装置计算接收的ADPCM码的短间隔的平均值，从该平均值识别信号传输路径的无线电环境的性质，并且认为当平均值 值超过分配无线电环境的阈值。 本发明包括用于输出咔嗒声噪声检测信号的咔嗒声噪声检测器（22）和用于通过将ADPCM解码器（21）的速度系数设置为“0”的帧的抑制点击噪声抑制电路 检测表示检测到接收到的ADPCM码的帧错误的帧错误检测信号和喀哒声检测信号。

公开(公告)号：US07391813B2

公开(公告)日：2008-06-24

申请号：US11010691

申请日：2004-11-19

申请人： Eiji Shinsho

发明人： Eiji Shinsho

IPC分类号： H04B14/04

CPC分类号： H04B14/068

摘要： A digital wireless communications device enabling call distance to be increased while avoiding mute processing as far as possible, even if code error occurs in an ADPCM code. The digital wireless communications device may be configured to include: an error detector for detecting code error in an ADPCM code received via a wireless circuit; an ADPCM decoder for generating a PCM signal by decoding the ADPCM code; and a substitution unit for determining that a click noise is generated if the high-speed scale factor and the low-speed scale factor determined by the ADPCM decoder within a predetermined time period after the error detector has judged that there is a code error in the ADPCM code, and the received ADPCM code itself, respectively exceed prescribed threshold values, and for substituting the ADPCM code with a predetermined prescribed code.

摘要翻译： 即使在ADPCM代码中发生代码错误，也能够尽可能地避免静音处理而增加呼叫距离的数字无线通信设备。 数字无线通信设备可以被配置为包括：用于检测经由无线电路接收的ADPCM代码中的代码错误的错误检测器; ADPCM解码器，用于通过对ADPCM码进行解码来产生PCM信号; 以及替代单元，用于如果在错误检测器已经判断出存在代码错误之后的预定时间段内由ADPCM解码器确定的高速比例因子和低速比例因子，则确定产生了点击噪声 ADPCM代码和所接收的ADPCM代码本身分别超过规定的阈值，并且用预定的规定代码代替ADPCM代码。

公开(公告)号：US20060029140A1

公开(公告)日：2006-02-09

申请号：US11010691

申请日：2004-11-19

申请人： Eiji Shinsho

发明人： Eiji Shinsho

IPC分类号： H04B14/06

CPC分类号： H04B14/068

摘要： A digital wireless communications device enabling call distance to be increased while avoiding mute processing as far as possible, even if code error occurs in an ADPCM code. The digital wireless communications device may be configured to include: an error detector for detecting code error in an ADPCM code received via a wireless circuit; an ADPCM decoder for generating a PCM signal by decoding the ADPCM code; and a substitution unit for determining that a click noise is generated if the high-speed scale factor and the low-speed scale factor determined by the ADPCM decoder within a predetermined time period after the error detector has judged that there is a code error in the ADPCM code, and the received ADPCM code itself, respectively exceed prescribed threshold values, and for substituting the ADPCM code with a predetermined prescribed code.

摘要翻译： 即使在ADPCM代码中发生代码错误，也能够尽可能地避免静音处理而增加呼叫距离的数字无线通信设备。 数字无线通信设备可以被配置为包括：用于检测经由无线电路接收的ADPCM代码中的代码错误的错误检测器; ADPCM解码器，用于通过对ADPCM码进行解码来产生PCM信号; 以及替代单元，用于如果在错误检测器已经判断出存在代码错误之后的预定时间段内由ADPCM解码器确定的高速比例因子和低速比例因子，则确定产生了点击噪声 ADPCM代码和所接收的ADPCM代码本身分别超过规定的阈值，并且用预定的规定代码代替ADPCM代码。