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    • 1. 发明授权
    • Noise reduction circuit
    • 降噪电路
    • US4636863A
    • 1987-01-13
    • US776876
    • 1985-09-17
    • Kazuhiro KaizakiSadao KubotaHiroshi HaradaShigeo Matsuura
    • Kazuhiro KaizakiSadao KubotaHiroshi HaradaShigeo Matsuura
    • H04N5/21H04N9/64
    • H04N5/21
    • A noise reduction circuit for reducing noise in video signal comprises delay circuits for delaying an output video signal for delay time 2S and H-S (H denotes one horizontal scanning period and S denotes a half of one period of the color subcarrier), an average circuit for averaging the outputs of the delay circuits, a subtraction circuit for subtracting the output of the average circuit from an input video signal, an attenuation circuit for attenuating the output of the subtraction circuit, an addition circuit for adding the output of the attenuation circuit to the input video signal, and an edge detection circuit for detecting the edge of pattern in the input video signal. The attenuation factor of the attenuation circuit is set into zero when the edge of pattern is detected.
    • 用于降低视频信号噪声的降噪电路包括用于延迟延迟时间2S和HS的输出视频信号的延迟电路(H表示一个水平扫描周期,S表示彩色副载波的一个周期的一半),平均电路 平均延迟电路的输出,减法电路,用于从输入视频信号中减去平均电路的输出;衰减电路,用于衰减减法电路的输出;加法电路,用于将衰减电路的输出与 输入视频信号,以及用于检测输入视频信号中图案边缘的边缘检测电路。 当检测到图案的边缘时,衰减电路的衰减因子被设置为零。
    • 8. 发明授权
    • Wireless communication system, and interference preventing method
    • 无线通信系统和防干扰方法
    • US08724655B2
    • 2014-05-13
    • US13518978
    • 2010-12-15
    • Chin-Sean SumHiroshi HaradaFumihide KojimaZhou Lan
    • Chin-Sean SumHiroshi HaradaFumihide KojimaZhou Lan
    • H04J3/16
    • H04W16/14H04W74/0808
    • An interference preventing method prevents communication interference between two or more wireless communication networks having mutually different physical layers, in which wireless communication is performed between a plurality of devices and a coordinator. By using a coordinator of each of the wireless communication networks, a scanning period for scanning a coexistence notification signal that is transmitted from a coordinator of another wireless communication network for a predetermined period is arranged before a first super frame immediately after input of power. The CB of the coordinator is transmitted at least once or more for one super frame, and, in a case where the CB transmitted from the coordinator of the other wireless communication network is acquired during the scanning period, control for preventing communication interference with the other wireless communication network is performed.
    • 防干扰方法防止在多个设备和协调器之间执行无线通信的具有相互不同的物理层的两个或更多个无线通信网络之间的通信干扰。 通过使用每个无线通信网络的协调器,在紧接着输入功率之后,在紧接在第一超级帧之前,布置用于扫描从另一无线通信网络的协调器发送预定时段的共存通知信号的扫描周期。 对于一个超帧,协调器的CB至少发送一次或更多,并且在扫描期间中从其他无线通信网络的协调器发送的CB的情况下,用于防止与其他无线通信网络的通信干扰的控制 执行无线通信网络。
    • 10. 发明授权
    • Mobile communication relay device
    • 移动通信中继设备
    • US08526354B2
    • 2013-09-03
    • US12700420
    • 2010-02-04
    • Kentaro IshizuHomare MurakamiStanislav FilinHiroshi Harada
    • Kentaro IshizuHomare MurakamiStanislav FilinHiroshi Harada
    • H04B7/14
    • H04W48/18H04W88/04H04W88/06
    • The present invention provides a user-carriable mobile communication relay device that relays communication between an internal network and an external network, in which even when the device is moved, the device dynamically selects and connects the external network depending on a surrounding radio wave environment or a communication content. The device is provided with an internal network communication adapter 13 compatible with the internal network connecting to a specific terminal device 4; external network communication adapters 11, 12 compatible with external networks with a mobile telephone network and with a wireless LAN at an installation site; a network selection processing portion 102 automatically selecting one or more networks to be connected, out of the external networks, according to stored profile information 141; an internal network connection processing portion 104 establishing or reconfiguring the connection to an internal network selected for a predetermined opportunity; an external network connection processing portion 105 establishing or reconfiguring the connection to an external network selected for a predetermined opportunity; and a communication relay processing portion 101 relay-processing communication between the internal network and the external network.
    • 本发明提供了一种用户可携带的移动通信中继设备,其中继内部网络与外部网络之间的通信,即使在移动设备的情况下,设备根据周围的无线电波环境动态地选择和连接外部网络, 通信内容。 该设备设置有与连接到特定终端设备4的内部网络兼容的内部网络通信适配器13; 外部网络通信适配器11,12与具有移动电话网络的外部网络和在安装地点的无线LAN兼容; 网络选择处理部分102根据存储的简档信息141自动选择要连接的一个或多个网络; 内部网络连接处理部分104建立或重新配置与为预定机会选择的内部网络的连接; 外部网络连接处理部分105建立或重新配置到为预定机会选择的外部网络的连接; 和通信中继处理部分101中继处理内部网络和外部网络之间的通信。