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    • 12. 发明申请
    • DEPI interface device for M-CMTS cable system and method thereof
    • 用于M-CMTS电缆系统的DEPI接口设备及其方法
    • US20080134262A1
    • 2008-06-05
    • US11888848
    • 2007-08-01
    • Joon Young JungO Hyung KwonSoo In Lee
    • Joon Young JungO Hyung KwonSoo In Lee
    • H04N7/173H04N7/16
    • H04N21/6175H04L12/2801H04L65/607H04N21/2221H04N21/6118H04N21/6125H04N21/6168
    • A downstream external PHY interface (DEPI) interface apparatus for a modular-cable modem termination system (M-CMTS) cable system complying with a data over cable service interface specifications (DOCSIS) standard is provided. The DEPI interface apparatus for an M-CMTS cable system complying with the DOCSIS standard includes: an Ethernet interface transmitting Ethernet data packets to and receiving Ethernet data packets from a service providing device including at least one of an M-CMTS core, a video server, and a video encoder; an Ethernet packet analyzer analyzing Ethernet data packets, thereby extracting a control message and classifying the Ethernet data packets into corresponding sessions; a DEPI controller interpreting the extracted control message and completing control connection signaling and session signaling with the service providing apparatus; a transmission data processor extracting transmission data from the Ethernet data packets classified by session and outputting the transmission data as an MPEG-2 transport stream (TS) packet stream; and an output interface outputting the output MPEG-2 TS packet stream to a quadrature amplitude modulation (QAM) modulator of a channel corresponding to the stream.
    • 提供了符合数据覆盖电缆业务接口规范(DOCSIS)标准的模块化电缆调制解调器终端系统(M-CMTS)电缆系统的下游外部PHY接口(DEPI)接口设备。 用于符合DOCSIS标准的M-CMTS电缆系统的DEPI接口装置包括:以太网接口,将以太网数据分组发送到服务提供设备并从服务提供设备接收以太网数据分组,所述服务提供设备包括M-CMTS核心,视频服务器 ,和视频编码器; 分析以太网数据包的以太网分组分析器,从而提取控制消息并将以太网数据分组分类为相应的会话; DEPI控制器,解释所提取的控制消息,并与服务提供设备完成控制连接信令和会话信令; 传输数据处理器,从由会话分类的以太网数据分组提取传输数据,并将传输数据作为MPEG-2传输流(TS)分组流输出; 以及将输出的MPEG-2TS分组流输出到与流相对应的信道的正交幅度调制(QAM)调制器的输出接口。
    • 13. 发明授权
    • Optical alignment apparatus and method using visual optical source and image
    • 光学对准装置及方法采用视觉光源和图像
    • US06922245B2
    • 2005-07-26
    • US10696896
    • 2003-10-29
    • Joon Young JungHyung Suk RyuHyun Seo Kang
    • Joon Young JungHyung Suk RyuHyun Seo Kang
    • G02B6/42G01B11/27G01B11/00
    • G01B11/272
    • Provided is an optical alignment apparatus and method that can enhance the efficiency of optical alignment by using a light source for generating light of a visible wavelength range and lensed fiber and perform optical alignment quickly, precisely and economically. The optical alignment apparatus of the present research includes: a first light source for providing light of a visible wavelength range to perform optical alignment; a second light source providing light of an infrared wavelength range; a micrometer stage for aligning the light outputted from the first light source or the second light source with an active area of a detector; lensed fiber for inputting light into the active area of the detector; an optical alignment confirming means for visually confirming whether the light outputted from the lensed fiber is aligned with the active area of the detector; an image information acquiring means for acquiring image information; and a control means for operating the micrometer stage.
    • 提供了一种通过使用用于产生可见波长范围的光的光源和透镜光纤来提高光学对准的效率的光学对准装置和方法,并且快速,精确和经济地执行光学对准。 本研究的光学对准装置包括:用于提供可见光波长范围的光以进行光学取向的第一光源; 提供红外波长范围的光的第二光源; 用于将从第一光源或第二光源输出的光与检测器的有效区域对准的千分尺级; 用于将光输入到检测器的有效区域中的透镜光纤; 光学对准确认装置,用于目视确认从透镜光纤输出的光是否与检测器的有效区域对准; 图像信息获取装置,用于获取图像信息; 以及用于操作千分尺级的控制装置。