公开(公告)号：US07248619B2

公开(公告)日：2007-07-24

申请号：US10415663

申请日：2001-11-09

申请人： Toshihiro Hayata

发明人： Toshihiro Hayata

IPC分类号： H04B1/00

CPC分类号： H04B1/7117 ,  H04B1/7113

摘要： In a rake receiver, a correlation-value calculation section calculates correlation values between spreading codes and reception signals from an input terminal and outputs the calculated correlation values to a delayed-profile creation section and a difference-history creation section. The delayed-profile creation section determines average correlation values and issues the values as a delayed profile to a path selection section. For each reception timing, the difference-history creation section compares the latest correlation value with a previous correlation value held by the difference-history creation section, to determine a difference history, and issues the difference history to the path selection section. The path selection section rearranges the delayed profile in decreasing order of the average correlation values. When the delayed profile and the difference history satisfy all predetermined conditions, the path selection section assigns the corresponding reception timing to a finger and issues the reception timing to the finger section.

摘要翻译： 在瑞克接收机中，相关值计算部分计算来自输入端的扩展码和接收信号之间的相关值，并将所计算出的相关值输出到延迟轮廓创建部分和差异历史创建部分。 延迟轮廓创建部分确定平均相关值并将值作为延迟轮廓发布到路径选择部分。 对于每个接收定时，差异历史创建部分将最新相关值与由差异历史创建部分保持的先前相关值进行比较，以确定差异历史，并将差异历史发布到路径选择部分。 路径选择部分以平均相关值的降序重新排列延迟的分布。 当延迟曲线和差异历史满足所有预定条件时，路径选择部分将对应的接收定时分配给手指，并将接收定时发送到手指部分。

公开(公告)号：US06658076B1

公开(公告)日：2003-12-02

申请号：US09487892

申请日：2000-01-19

申请人： Toshihiro Hayata

发明人： Toshihiro Hayata

IPC分类号： H04L2300

CPC分类号： H04B1/709 ,  H04B1/707 ,  H04B2201/70705

摘要： In a spread spectrum receiver, a first despread signal is produced by a despreading circuit corresponding to a first symbol rate. The despreading circuit is responsive to a command signal for subsequently producing a second despread signal corresponding to the second symbol rate. A symbol rate estimation circuit is provided for estimating, from the first despread signal, the transmitted symbol rate of the spread spectrum signal as one of the first and second symbol rates. If the transmitted symbol rate is estimated as the first symbol rate, the despreading circuit continues producing the first despread signal. If the transmitted symbol rate is estimated as the second symbol rate, the estimation circuit supplies the command signal to the despreading circuit to produce the second despread signal. A decoding circuit decodes the first and second despread signals.

摘要翻译： 在扩频接收机中，第一解扩信号由对应于第一符号率的解扩电路产生。 解扩电路响应于命令信号，随后产生对应于第二符号率的第二解扩信号。 提供符号率估计电路，用于从第一去扩展信号估计作为第一和第二符号率之一的扩展频谱信号的传输符号率。 如果发送的符号率被估计为第一符号率，则解扩电路继续产生第一解扩信号。 如果发送的符号率被估计为第二符号率，则估计电路将该命令信号提供给解扩电路以产生第二解扩信号。 解码电路对第一和第二解扩信号进行解码。

公开(公告)号：US6006176A

公开(公告)日：1999-12-21

申请号：US105193

申请日：1998-06-26

申请人： Toshihiro Hayata

发明人： Toshihiro Hayata

IPC分类号： G10L11/02 ,  G10L11/06 ,  G10L15/04 ,  G10L19/00 ,  H04B14/04 ,  H04J3/17 ,  G10L3/02 ,  G10L9/00

CPC分类号： G10L19/012 ,  G10L25/93

摘要： A speech coding apparatus which allows a speech decoding apparatus to output a more familiar background noise. The speech coding apparatus includes a voice presence/absence discrimination section, a coding section, a unique word production section, and a data switching section which selectively outputs one of outputs of the coding section and the unique word production section as an output of the speech coding apparatus in response to a result of discrimination of the voice presence/absence discrimination section. The speech coding apparatus further includes an amplitude level discrimination section, a clip processing section and an input switching section. The input switching section selects, when the input speech signal includes voice, the input speech signal, but when the input speech signal includes no voice and a code for updating background noise is to be produced, the input switching section selects the input speech signal after clip processing.

摘要翻译： 一种语音编码装置，其允许语音解码装置输出更熟悉的背景噪声。 语音编码装置包括语音有无鉴别部分，编码部分，唯一字产生部分和数据切换部分，其选择性地输出编码部分和唯一字产生部分的输出之一作为语音的输出 编码装置响应于语音有/无鉴别部分的辨别结果。 语音编码装置还包括幅度电平鉴别部分，片段处理部分和输入切换部分。 当输入语音信号包括语音时，输入切换部分选择输入语音信号，但是当输入语音信号不包括语音并且将产生用于更新背景噪声的代码时，输​​入切换部分选择输入语音信号 剪辑处理。

公开(公告)号：US5787388A

公开(公告)日：1998-07-28

申请号：US666124

申请日：1996-06-21

申请人： Toshihiro Hayata

发明人： Toshihiro Hayata

IPC分类号： H04B14/04 ,  G10L19/00 ,  H04B14/00 ,  G10L9/14

CPC分类号： G10L19/012

摘要： In a speech decoding apparatus, a conversion unit converts a received encoded signal into a parameter in units of frames. A memory repeatedly updates and stores the parameter representing a pause state and output from the conversion unit for the pause interval of the speech signal. A synthesis filter coefficient generation unit generates a synthesis filter coefficient on the basis of the parameter read out from the memory. A smoothed filter coefficient generation unit generates a smoothed filter coefficient on the basis of the synthesis filter coefficient output from the synthesis filter coefficient generation unit. The smoothed filter coefficient generation unit generates the smoothed filter coefficient which is smoothed such that the synthesis filter coefficient changes in accordance with a count value of the frames during the predetermined period. A background noise generation unit generates background noise on the basis of the parameter read out from the memory for the pause interval of the speech signal. A smoothing filter performs filtering processing of the background noise output from the background noise generation unit by using the smoothed filter coefficient output from the smoothed filter coefficient unit and outputs smoothed background noise.

摘要翻译： 在语音解码装置中，转换单元以帧为单位将接收的编码信号转换为参数。 存储器重复地更新并存储表示暂停状态的参数，并且从语音信号的暂停间隔的转换单元输出。 合成滤波器系数生成单元根据从存储器读出的参数生成合成滤波器系数。 平滑滤波器系数生成单元基于从合成滤波器系数生成单元输出的合成滤波器系数，生成平滑滤波器系数。 平滑滤波器系数生成单元生成平滑后的滤波器系数，使得合成滤波器系数根据预定时段内的帧的计数值而变化。 背景噪声生成单元基于从存储器读出的用于语音信号的暂停间隔的参数来生成背景噪声。 平滑滤波器通过使用从平滑滤波器系数单元输出的平滑滤波器系数对背景噪声生成单元输出的背景噪声进行滤波处理，并输出平滑的背景噪声。

公开(公告)号：US5553192A

公开(公告)日：1996-09-03

申请号：US133864

申请日：1993-10-12

申请人： Toshihiro Hayata

发明人： Toshihiro Hayata

IPC分类号： G10L19/06 ,  G10L11/02 ,  G10L19/00 ,  G10L21/02 ,  H04B1/46 ,  H04B14/04 ,  G10L9/00

CPC分类号： G10L19/012 ,  G10L21/0364 ,  G10L25/78

摘要： The disclosure is to eliminate discomforting background noise regenerated at a receive side (viz., a base station) in a mobile radio communications system wherein discontinuous transmission (DTX) is utilized. When speech pause is detected at the receive side, synthesis filter coefficients are produced using a background noise code which has been transmitted from a mobile unit. Subsequently, a Q value of the synthesis filter is measured using the above-mentioned synthesis filter coefficients. If the Q value is larger than a threshold level, each of the filter coefficients is lowered by a predetermined value. Thus, the regenerated discomforting background noise can effectively be reduced.

摘要翻译： 本公开是为了消除在使用不连续传输（DTX）的移动无线电通信系统中在接收侧（即，基站）处再生的不舒服的背景噪声。 当在接收侧检测到语音暂停时，使用从移动单元发送的背景噪声码产生合成滤波器系数。 随后，使用上述合成滤波器系数测量合成滤波器的Q值。 如果Q值大于阈值电平，则将滤波器系数中的每一个降低预定值。 因此，可以有效地减少再生的不适背景噪声。

公开(公告)号：US5819218A

公开(公告)日：1998-10-06

申请号：US794138

申请日：1997-02-03

申请人： Toshihiro Hayata ,  Yoshihiro Unno

发明人： Toshihiro Hayata ,  Yoshihiro Unno

IPC分类号： G10L19/012 ,  G10L19/20 ,  G10L25/78 ,  G10L25/93 ,  H03M7/00 ,  G01L9/00

CPC分类号： G10L19/012 ,  G10L19/20 ,  G10L25/78 ,  G10L25/93

摘要： A voice encoder which pauses outputting codewords in accordance with the absence of voice activity. An input aural signal is divided into frames and inputted to the voice encoder. The voice encoder has a voice activity detection circuit for determining at each frame whether voice activity is absent or present, a voice encoding circuit, a background noise update judging circuit for detecting a change in the characteristics of the input aural signal, and a control circuit. If the absence of voice activity is detected, the control circuit causes the frame at that time to be encoded as a background noise frame, and then pauses the operation of the voice encoding circuit. If the presence of voice activity is detected, the operation of the voice encoding circuit is resumed. Furthermore, if the voice encoding circuit is not in operation when a change in the characteristics of the input aural signal is detected, the control circuit causes the voice encoding circuit to encode the frame at that time as a background noise frame and then again stop the operation of the voice encoding circuit.

摘要翻译： 语音编码器，其根据不存在语音活动而暂停输出码字。 输入听觉信号被分成帧并输入到语音编码器。 语音编码器具有语音活动检测电路，用于在每个帧确定语音活动是否存在或不存在，语音编码电路，用于检测输入听觉信号的特性变化的背景噪声更新判断电路以及控制电路 。 如果检测不到语音活动，则控制电路使得该时刻的帧被编码为背景噪声帧，然后暂停语音编码电路的操作。 如果检测到语音活动的存在，则恢复语音编码电路的操作。 此外，如果在检测到输入听觉信号的特性的变化的情况下语音编码电路不工作，则控制电路使得语音编码电路当时将帧编码为背景噪声帧，然后再次停止 语音编码电路的操作。

公开(公告)号：US07079569B1

公开(公告)日：2006-07-18

申请号：US10088694

申请日：2000-09-18

申请人： Toshihiro Hayata

发明人： Toshihiro Hayata

IPC分类号： H04B1/69

CPC分类号： H04B1/70758 ,  H04B1/70754 ,  H04B1/7083 ,  H04B1/7113 ,  H04B1/7115 ,  H04B1/7117

摘要： Two kinds of user-tailored searchers, narrow-search-range searchers (3, 4) and a wide-search-range searcher (5), are set out of a plurality of groups of searchers in compliance with the features of two kinds of multi-paths in mobile communication, and are used, thereby making it possible to search efficiently with high accuracy and on reduced hardware and software scales.

摘要翻译： 两种用户定制的搜索器，窄搜索范围搜索器（3,4）和广泛搜索范围搜索器（5）被设置在多个搜索者组中，符合两种 移动通信中的多路径，并且被使用，从而使得可以以高精度和降低的硬件和软件规模有效地搜索。

公开(公告)号：US07054347B2

公开(公告)日：2006-05-30

申请号：US09899840

申请日：2001-07-09

申请人： Toshihiro Hayata

发明人： Toshihiro Hayata

IPC分类号： H04B1/69 ,  H04B1/707 ,  H04B1/713

CPC分类号： H04B1/70754 ,  H04B1/709 ,  H04B1/7113 ,  H04B1/7117 ,  H04B2201/70707

摘要： Signals sent from a sender by a code division multiple access communication system are input respectively into first to Mth delay units which are disposed parallel to one another. The correlation is examined in each correlator, and the results of a predetermined number of times of correlation are averaged in each averaging section. Based on this, path detection is carried out in each path detector. The results of path detection are input into a correlator control unit which performs control in such a manner that the number of times of averaging in an averaging section is smaller for a higher correlation value.

摘要翻译： 通过码分多址通信系统从发送方发送的信号分别输入彼此平行布置的第一至第M延迟单元。 在每个相关器中检查相关性，并且在每个平均部分中平均预定次数相关的结果。 基于此，在每个路径检测器中执行路径检测。 路径检测的结果被输入到相关器控制单元，该相关器控制单元以这样的方式执行控制，使得对于较高的相关值，平均化部分中的平均次数较小。

公开(公告)号：US5809460A

公开(公告)日：1998-09-15

申请号：US337010

申请日：1994-11-07

申请人： Toshihiro Hayata ,  Yoshihiro Unno

发明人： Toshihiro Hayata ,  Yoshihiro Unno

IPC分类号： G10L21/02 ,  G10L13/00 ,  G10L19/00 ,  G10L5/00

CPC分类号： G10L19/012

摘要： In a LPC speech signal decoder, background noise is simulated during periods of silence at the transmitting end based upon a background noise frame containing information about the background noise at the sending end. When the silence persists, the transmitter periodically updates the background noise frame previously send by transmitting an updating background noise frame. When an update background noise frame is received, an interpolation is performed so as to make the simulated background noise sound natural to the listener. The interpolation process includes a step of selecting between interpolation spectrum parameters which are produced by the interpolation process and the updated spectrum parameters which are based solely upon the most recent updated background noise frame.

摘要翻译： 在LPC语音信号解码器中，基于包含有关发送端的背景噪声的信息的背景噪声帧，在发送端的静音期间模拟背景噪声。 当静音持续时，发射机通过发送更新的背景噪声帧来周期性地更新先前发送的背景噪声帧。 当接收到更新背景噪声帧时，执行插值，以使模拟的背景噪声对听众是自然的。 内插处理包括在内插处理产生的内插频谱参数和仅基于最近更新的背景噪声帧的更新的频谱参数之间进行选择的步骤。

公开(公告)号：US20050260991A1

公开(公告)日：2005-11-24

申请号：US10526067

申请日：2003-08-26

申请人： Toshihiro Hayata

发明人： Toshihiro Hayata

IPC分类号： H04L1/00 ,  H04W36/12 ,  H04Q7/20

CPC分类号： H04W36/12

摘要： During inter-frequency HO, an HO destination BTS (2) transmits, in gaps in compressed mode, to an MS (3) in the HO destination frequency, data that are identical to data that are transmitted by the HO origin BTS (1) to the MS (3) in the HO origin frequency. In addition, the MS (3) switches frequencies from the HO origin frequency to the HO destination frequency in the gaps in compressed mode, and the MS (3) thus transmits to the BTS (2) data that are identical to data that are transmitted to the BTS (1) in the HO origin frequency.

摘要翻译： 在频率间HO中，HO目的地BTS（2）在压缩模式的间隙中向HO目的地频率中的MS（3）发送与HO起始BTS（1）发送的数据相同的数据， 到HO（3）的HO起始频率。 此外，MS（3）在压缩模式的间隙中将从HO起始频率到HO目的地频率的频率切换，并且MS（3）从而向BTS（2）发送与发送的数据相同的数据 到HO（1）的起始频率。