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    Channel check test system
    53.
    发明授权
    Channel check test system 失效
    通道检查测试系统

    公开(公告)号：US06498833B2

    公开(公告)日：2002-12-24

    申请号：US09922858

    申请日：2001-08-07

    申请人： Yukimasa Sugino ,  Shigeaki Suzuki ,  Nobuyoshi Horie

    发明人： Yukimasa Sugino ,  Shigeaki Suzuki ,  Nobuyoshi Horie

    IPC分类号： H04M124

    CPC分类号： H04L1/24 ,  H04B14/048 ,  H04L43/50 ,  H04M3/00 ,  H04M3/244 ,  H04Q11/04 ,  H04Q2213/13034 ,  H04Q2213/1316 ,  H04Q2213/13166 ,  H04Q2213/13213 ,  H04Q2213/13216 ,  H04Q2213/1331 ,  H04Q2213/1332 ,  H04Q2213/13322

    摘要： When there is an error in setting of a companding law of an encoder or a decoder, there is a problem of an error in judgment although it should be originally judged that the continuity of the testing channel does not exist. Therefore, a channel check test system includes a transmitting side DCME for inserting a nonlinear quantized input test pattern into a channel to be tested, and a receiving side DCME. The receiving side DCME includes an adder for adding an offset value to an output value of a linear converting section, a sign extracting section for extracting a sign from an output signal of the adder, a delay unit for delaying the extracted sign, an exclusive OR arithmetic unit for performing an exclusive OR operation of the extracted sign and an output signal of the delay unit, a counter for counting the number of times of conformity in which an output value of the exclusive OR arithmetic unit is in conformity with a predetermined value, and a comparator for comparing a counted value of the counter and a threshold value and outputting judged results. Existence or nonexistence of the continuity of the channel to be tested can be checked including an error in setting of the PCM companding law in one of the transmitting side DCME and the receiving side DCME.

    摘要翻译： 当编码器或解码器的压扩定律设定有错误时，尽管最初应该判断出测试通道的连续性不存在，但存在判断错误的问题。因此，通道检查测试 系统包括用于将非线性量化输入测试图案插入待测试通道的发送侧DCME和接收侧DCME。 接收侧DCME包括用于将偏移值与线性转换部分的输出值相加的加法器，用于从加法器的输出信号中提取符号的符号提取部分，用于延迟提取的符号的延迟单元，异或 用于执行所提取的符号的异或运算的运算单元和延迟单元的输出信号，用于对异或运算单元的输出值与预定值一致的计数符合次数的计数器， 以及比较器，用于比较计数器的计数值和阈值，并输出判定结果。可以检查出要测试的通道的连续性的存在或不存在，其中包括在传输中的一个中的PCM压扩法的设置中的错误 侧DCME和接收端DCME。

    Channel check test system
    54.
    发明授权
    Channel check test system 失效

    公开(公告)号：US06324260B1

    公开(公告)日：2001-11-27

    申请号：US09634765

    申请日：2000-08-07

    申请人： Yukimasa Sugino ,  Shigeaki Suzuki ,  Nobuyoshi Horie

    发明人： Yukimasa Sugino ,  Shigeaki Suzuki ,  Nobuyoshi Horie

    IPC分类号： H04M124

    CPC分类号： H04L1/24 ,  H04B14/048 ,  H04L43/50 ,  H04M3/00 ,  H04M3/244 ,  H04Q11/04 ,  H04Q2213/13034 ,  H04Q2213/1316 ,  H04Q2213/13166 ,  H04Q2213/13213 ,  H04Q2213/13216 ,  H04Q2213/1331 ,  H04Q2213/1332 ,  H04Q2213/13322

    摘要： When there is an error in setting of a companding law of an encoder or a decoder, there is a problem of an error in judgment although it should be originally judged that the continuity of the testing channel does not exist. Therefore, a channel check test system includes a transmitting side DCME for inserting a nonlinear quantized input test pattern into a channel to be tested, and a receiving side DCME. The receiving side DCME includes an adder for adding an offset value to an output value of a linear converting section, a sign extracting section for extracting a sign from an output signal of the adder, a delay unit for delaying the extracted sign, an exclusive OR arithmetic unit for performing an exclusive OR operation of the extracted sign and an output signal of the delay unit, a counter for counting the number of times of conformity in which an output value of the exclusive OR arithmetic unit is in conformity with a predetermined value, and a comparator for comparing a counted value of the counter and a threshold value and outputting judged results. Existence or nonexistence of the continuity of the channel to be tested can be checked including an error in setting of the PCM companding law in one of the transmitting side DCME and the receiving side DCME.

    Echo canceller and method for controlling echo cancellation
    55.
    发明授权
    Echo canceller and method for controlling echo cancellation 失效
    回波消除器和回波消除控制方法

    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。

    Radio communication apparatus, radio communication method, and radio communication system
    58.
    发明授权
    Radio communication apparatus, radio communication method, and radio communication system 有权
    无线通信装置，无线通信方法以及无线通信系统

    公开(公告)号：US08279046B2

    公开(公告)日：2012-10-02

    申请号：US12417310

    申请日：2009-04-02

    申请人： Shigeaki Suzuki

    发明人： Shigeaki Suzuki

    IPC分类号： H04Q5/22

    CPC分类号： H04W74/0816

    摘要： A radio communication apparatus stores, in a pattern storing unit, channel pattern data indicating radio channel switching order for searching for a free channel and stores switching condition data for the radio channel in a condition storing unit. A control unit of the radio communication apparatus switches, when the switching condition data stored in the condition storing unit is satisfied, the radio channel according to the switching order indicated by the channel pattern data stored in the pattern storing unit.

    摘要翻译： 无线电通信装置在模式存储单元中存储指示用于搜索空闲信道的无线电信道切换顺序的信道模式数据，并将条件存储单元中的无线电信道的切换条件数据存储。 无线电通信装置的控制单元在存储在条件存储单元中的切换条件数据满足时切换根据存储在模式存储单元中的信道模式数据指示的切换顺序的无线电信道。