公开(公告)号：US06147973A

公开(公告)日：2000-11-14

申请号：US820983

申请日：1997-03-19

申请人： Yukimasa Sugino ,  Yushi Naito ,  Hideaki Ebisawa ,  Nobuyoshi Horie

发明人： Yukimasa Sugino ,  Yushi Naito ,  Hideaki Ebisawa ,  Nobuyoshi Horie

IPC分类号： H04N1/32 ,  G10L25/93 ,  H04M20060101 ,  H04M11/00 ,  H04M11/06 ,  H04Q1/46

CPC分类号： H04Q1/46 ,  G10L25/78 ,  G10L25/18 ,  H04M11/066

摘要： A reset signal generating part outputs reset signals RV and RD to a signal discriminating part, based on an output from a 2100 Hz detecting part which detects whether or not a tone of 2100 Hz exists in an input signal. When the 2100 Hz tone is detected, the signal discriminating part firstly resets a discrimination state at "speech" and secondly sets the discrimination state at "data" based on the reset signal. Therefore, a signal discrimination apparatus, wherein it is possible to reset the discrimination state at "speech" at the beginning of a facsimile call even when no call control information is received, can be provided.

摘要翻译： 复位信号生成部基于检测输入信号中是否存在2100Hz的音调的2100Hz检测部的输出，将复位信号RV，RD输出到信号鉴别部。 当检测到2100Hz音时，信号识别部分首先在“语音”处复位识别状态，其次基于复位信号将判别状态设置为“数据”。 因此，即使在没有接收到呼叫控制信息的情况下，也可以在传真呼叫开始时将“语音”的识别状态复位的信号鉴别装置。

公开(公告)号：US5694517A

公开(公告)日：1997-12-02

申请号：US481056

申请日：1995-06-07

申请人： Yukimasa Sugino ,  Yushi Naito

发明人： Yukimasa Sugino ,  Yushi Naito

IPC分类号： G10L15/10 ,  G10L11/02 ,  G10L15/00 ,  G10L19/00 ,  H04M11/06 ,  G10L9/12

CPC分类号： G10L25/78 ,  G10L25/27

摘要： A signal discrimination circuit for discriminating between a voice signal and a voiceband data signal that is transmitted over a telephone network. The signal discrimination circuit includes an electric power judgement unit, a zero-crossing number judgement unit, a sub-band power calculation unit, a tone detection unit, and a discriminated result output unit. The electric power judgement unit determines whether an input signal is a voice signal or a voiceband data signal based on an interblock electric power ratio of the input signal. The zero-crossing number judgement unit determines whether the input signal is a voice signal or a voiceband data signal based on a zero-crossing number of the input signal. The sub-band power calculation unit analyzes the input signal with a spectrum analyzer to generate a spectrum analyzed result and calculates sub-band powers using the spectrum analyzed result, and the tone detection unit determines a presence and absence of a tone signal based on the sub-band powers calculated by the sub-band power calculation unit. Based on determined results of the electric power judgement unit, the zero-crossing number judgement unit, and the tone detection unit, the discriminated result output unit determines whether the input signal is a voice signal or a voiceband data signal and outputs a judged result.

摘要翻译： 一种信号鉴别电路，用于鉴别通过电话网络发送的语音信号和语音频带数据信号。 信号鉴别电路包括电力判断单元，过零数判断单元，子带功率计算单元，音调检测单元和鉴别结果输出单元。 电力判断单元基于输入信号的块间电力比来确定输入信号是语音信号还是语音带数据信号。 过零数判断单元基于输入信号的过零数来确定输入信号是语音信号还是语音带数据信号。 子带功率计算单元利用频谱分析器对输入信号进行分析，生成频谱分析结果，并使用频谱分析结果计算子频带功率，并且基于该频带分析结果，音调检测单元确定是否存在音调信号 由子带功率计算单元计算的子带功率。 基于电力判断单元，过零次数判断单元和音调检测单元的确定结果，判别结果输出单元确定输入信号是语音信号还是语音带数据信号，并输出判断结果。

公开(公告)号：US5280561A

公开(公告)日：1994-01-18

申请号：US750290

申请日：1991-08-27

申请人： Mihoko Satoh ,  Hideaki Ebisawa ,  Yushi Naito

发明人： Mihoko Satoh ,  Hideaki Ebisawa ,  Yushi Naito

IPC分类号： G10L19/02 ,  H03G9/14 ,  H03M7/30 ,  H04B1/66 ,  H04M3/56 ,  G10L5/00

CPC分类号： H04B1/667 ,  H04M3/561

摘要： Improvements in a method of processing wideband audio signals by a sub-band coding system are provided. Linear codes having frequency components in which audio signal power is concentrated are selected from linear codes separated into a plurality of frequency band components and decoded. The presence or absence of sound in the audio signals is detected by referring to the selected linear codes and/or a gain coefficient is determined. Level control of the decoded linear codes is performed by using the thus determined gain coefficient.

摘要翻译： 提供了通过子带编码系统处理宽带音频信号的方法的改进。 具有音频信号功率集中的频率分量的线性码从分离成多个频带分量的线性码选择并被解码。 通过参考所选择的线性码来检测音频信号中是否存在声音，和/或确定增益系数。 通过使用如此确定的增益系数来执行解码的线性码的电平控制。

公开(公告)号：US5121349A

公开(公告)日：1992-06-09

申请号：US558069

申请日：1990-07-25

申请人： Yushi Naito

发明人： Yushi Naito

IPC分类号： H03K3/84 ,  H04B14/04 ,  H04J3/17

CPC分类号： H03K3/84

摘要： A digital noise generator for transmitting white noise during a period when a digital telephone speech signal is absent. The digital noise generator includes a pseudo-random bit sequence generator, an amplitude control circuit, and a PCM code-word-generating shift register. A pseudo-random bit sequence is generated by the pseudo-random bit sequence generator, an amplitude code-word is generated by the amplitude control circuit, and pseudo-random noise signal is generated and outputted by the PCM code-word-generating shift register on the basis of the pseudo-random bit sequence and the amplitude code-word.

摘要翻译： 一种用于在数字电话语音信号不存在的时段期间发送白噪声的数字噪声发生器。 数字噪声发生器包括伪随机比特序列发生器，幅度控制电路和PCM码字生成移位寄存器。 伪随机比特序列由伪随机比特序列生成器产生，幅度码字由幅度控制电路产生，伪随机噪声信号由PCM码字产生移位寄存器产生并输出 基于伪随机比特序列和幅度码字。

公开(公告)号：US5873058A

公开(公告)日：1999-02-16

申请号：US824520

申请日：1997-03-26

申请人： Hisashi Yajima ,  Noriaki Kawano ,  Yushi Naito ,  Shigeaki Suzuki

发明人： Hisashi Yajima ,  Noriaki Kawano ,  Yushi Naito ,  Shigeaki Suzuki

IPC分类号： G10L19/04 ,  G10L20060101 ,  G10L15/00 ,  G10L19/00 ,  G10L19/12 ,  G10L19/14 ,  H03M3/04 ,  H03M7/30 ,  H04B1/66 ,  H04J3/17 ,  H04L12/28 ,  H04Q3/00 ,  G10L3/00

CPC分类号： G10L19/173

摘要： In a voice coding-and-transmission system using a differential coding, a degradation of voice quality caused by a silent period transmission network and an ATM network is prevented without improving a silent-period elimination transmission network and existing transmission networks such as a STM network. In a relay node 104, an encoder 114 codes a voice signal from a decoder 108 again for a transient period immediately after a voice is started, and a transmission node 100 and a reception node 102 are tandem-connected. The encoder 114 and a decoder 122 at a reception node 102 are given respectively same reference values of a differential processing by memories 118, 128 when the voice is started, thereby preventing an abnormal sound generation due to a mismatch of inner statuses thereof when the voice is started. During the transient period, the internal statuses of an encoder 106 at a reception node 100 and the decoder 122 are closed each other. After the transient period is elapsed, switching a switch in a silent-period eliminator 112 to a digital-one-link, thereby preventing the degradation of the voice quality caused by quantization errors.

摘要翻译： 在使用差分编码的语音编码 - 传输系统中，防止由无声期传输网络和ATM网络引起的语音质量的恶化，而不改进无声期消除传输网络和诸如STM网络的现有传输网络 。 在中继节点104中，编码器114在语音开始之后立即再次对来自解码器108的语音信号进行编码，并且发送节点100和接收节点102串联连接。 接收节点102处的编码器114和解码器122在语音开始时由存储器118,128分别给出与差分处理相同的参考值，从而防止当声音的内部状态不匹配时产生异常声音 开始了 在过渡期间，编码器106在接收节点100和解码器122的内部状态彼此关闭。 在经过了暂时期之后，将无声期消除器112中的开关切换到数字一链路，从而防止由量化误差引起的语音质量的劣化。

公开(公告)号：US4972411A

公开(公告)日：1990-11-20

申请号：US343400

申请日：1989-04-25

申请人： Wataru Fushimi ,  Noriaki Kawano ,  Yushi Naito

发明人： Wataru Fushimi ,  Noriaki Kawano ,  Yushi Naito

IPC分类号： H04J3/12

CPC分类号： H04J3/12

摘要： A signalling transmission system is disclosed which consists of a transmitting module including a signalling variation detecting unit and a signalling synthesization unit, and a receiving module including a signalling flag detecting unit and a signalling separation unit. The signalling synthesization unit makes composition signals by inserting signalling signals into voice signals together with a flag when signalling variations are detected by the variation detecting unit. A flag detecting unit detects a flag contained in the composition signals received by the receiving module and instructs the separating unit to separate the signalling signals from the voice signals contained the composition signals when the flag shows that the composition signals include the signalling signals. The signalling signals and the voice signals are therefore output from the receiving module.

摘要翻译： 公开了一种由包括信令变化检测单元和信令合成单元的发送模块组成的信令传输系统，以及包括信令标志检测单元和信令分离单元的接收模块。 当由变化检测单元检测到信令变化时，信令合成单元通过将信令信号与标志一起插入语音信号来产生合成信号。 标志检测单元检测由接收模块接收到的合成信号中包含的标志，并且当标志表示合成信号包括信令信号时，指示分离单元从包含合成信号的语音信号中分离信令信号。 因此，信令信号和语音信号从接收模块输出。

公开(公告)号：US5533121A

公开(公告)日：1996-07-02

申请号：US301344

申请日：1994-09-06

申请人： Shigeaki Suzuki ,  Yushi Naito

发明人： Shigeaki Suzuki ,  Yushi Naito

IPC分类号： H04B3/23 ,  H04M1/58

CPC分类号： H04B3/23

摘要： An echo canceller is disclosed which is capable of disabling its echo cancelling function when other echo cancellers are connected in tandem in a communications network. A pattern is inserted by extracting bits from a receiving side pulse code modulation (PCM) signal bit stream and replacing them with a predetermined bit-pattern sequence. When the predetermined bit-pattern sequence is detected at a transmission side input PCM signal bit stream, the echo cancelling function is disabled.

摘要翻译： 公开了一种回声消除器，当其他回波消除器在通信网络中串联连接时，能够禁用其回波消除功能。 通过从接收侧脉冲编码调制（PCM）信号比特流中提取比特并用预定比特模式序列替换它们来插入模式。 当在发送侧输入PCM信号比特流中检测到预定比特模式序列时，回声消除功能被禁用。

公开(公告)号：US5159638A

公开(公告)日：1992-10-27

申请号：US544591

申请日：1990-06-27

申请人： Yushi Naito ,  Kazuo Saito

发明人： Yushi Naito ,  Kazuo Saito

IPC分类号： G10L11/00 ,  G10L11/02 ,  G10L15/02 ,  G10L15/04 ,  G10L15/10 ,  H04B14/04 ,  H04J3/14 ,  H04J3/17

CPC分类号： G10L25/78

摘要： A speech detector has an intensity detector that indicates whether the intensity of a PCM signal exceeds a first threshold, and a normal-zero-crossing-count detector that indicates whether the zero-crossing count of the PCM signal exceeds a second threshold. The outputs of the intensity detector and normal-zero-crossing-count detector are combined by AND logic to produce the output of the speech detector. The second threshold is set well below the minimum zero-crossing count occurring in normal speech, the function of the normal-zero-crossing-count detector being to disable speech detection during line faults.

公开(公告)号：US4157514A

公开(公告)日：1979-06-05

申请号：US911086

申请日：1978-05-31

申请人： Yushi Naito ,  Yoichi Moritani ,  Yoshinori Uchida

发明人： Yushi Naito ,  Yoichi Moritani ,  Yoshinori Uchida

IPC分类号： H04N5/06 ,  H03L7/12 ,  H03B3/04

CPC分类号： H03L7/12

摘要： An incoming signal including the object signal and plurality of noise signals dispersed about the object signal is fully masked with white noise and applied to a phase synchronization loop wide in loop band width and including a local oscillator repeatedly swept by a sweep generator. During the repeated sweep a control signal generator successively decreases the level of the white noise until the oscillator is locked in the phase of the object signal. At that time the signal control generator is operated to suspend the sweeping operation and prevent the white noise from being added to the incoming signal.

摘要翻译： 包括物体信号和分散在物体信号上的多个噪声信号的输入信号被白噪声完全屏蔽，并且被施加到环路宽度宽的相位同步环路并且包括被扫描发生器重复扫描的本地振荡器。 在重复扫描期间，控制信号发生器连续地降低白噪声的电平，直到振荡器被锁定在对象信号的相位中。 此时，信号控制发生器被操作以暂停扫描操作，并防止将白噪声添加到输入信号。

公开(公告)号：US06172978B2

公开(公告)日：2001-01-09

申请号：US08982505

申请日：1997-12-02

申请人： Wataru Fushimi ,  Yoshihiko Shirokura ,  Yukimasa Sugino ,  Hideaki Ebisawa ,  Yushi Naito

发明人： Wataru Fushimi ,  Yoshihiko Shirokura ,  Yukimasa Sugino ,  Hideaki Ebisawa ,  Yushi Naito

IPC分类号： H04L1266

CPC分类号： H04L12/64 ,  H04J2203/005 ,  H04J2203/0087 ,  H04L2012/5616 ,  H04L2012/5671 ,  H04Q11/0478

摘要： In establishing an audio one link connection wherein an audio signal is not encoded/decoded in a relay station, loud noises may be produced if the states of two audio tandem relay devices which make a pair during relay are changed from a normal connection state to a relay connection state at different times. In order to solve this problem, comfort noise generators are provided. In detail, when a first pattern signal is detected while a relay call is connected via a relay exchange, switches are switched to be connected at a contact point 1, and a switch is at a contact point 2. Upon detection of a second pattern signal, the switches are connected at the contact points 2, while the switches are connected at the contact points 2. With this arrangement, outputs from the comfort noise generators are selected and outputted during a period from first pattern signal detection to second pattern signal detection, during which the states of the two devices of a pair are different. As a result, occurrence of loud noises is prevented.

摘要翻译： 在建立音频信号在中继站中不进行编码/解码的音频一链路连接的情况下，如果在中继期间使一对成对的两个音频串联中继装置的状态从正常连接状态改变为 不同时间的中继连接状态。 为了解决这个问题，提供舒适噪音发生器。 详细地说，当通过中继交换机连接中继呼叫时检测到第一模式信号时，开关被切换为在接触点1处连接，并且开关处于接触点2.在检测到第二模式信号 开关连接在接触点2上，同时开关连接在接点2处。由此，在从第一模式信号检测到第二模式信号检测的期间，选择并输出来自舒适噪声发生器的输出， 在此期间，一对的两个装置的状态不同。 结果，防止发出大的噪音。