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    ON-CHANNEL REPEATING APPARATUS AND METHOD
    41.
    发明专利
    ON-CHANNEL REPEATING APPARATUS AND METHOD 未知

    公开(公告)号：CA2697008A1

    公开(公告)日：2009-02-26

    申请号：CA2697008

    申请日：2008-08-20

    Applicant: KOREA ELECTRONICS TELECOMM

    Inventor： PARK SUNG IK ,  KIM HEUNG MOOK ,  LIM JONG-SOO ,  LEE SOO IN

    IPC: H04B7/14

    Abstract: The present invention relates to an on-channel repeating apparatus and method. An embodiment of the present invention provides an on-channel repeating method including: subtracting a replica of a feedback signal from a signal received from a main transmitter or another repeating apparatus; demodulating and equalizing the signal to remove noise, a multipath signal, and the remaining feedback signal from the signal; inserting identification signal having good correlation properties into the signal; modulating the signal; and transmitting the modulated signal. Another embodiment of the present invention provides an on-channel repeating apparatus including: a unit that converts signals received from a main transmitter or another repeating apparatus into signals in a predetermined band; a unit that generates identification signals having good correlation properties; a unit that generates a replica from the signals in the predetermined band and the identification signal, and then removes a feedback signal; a unit that demodulates a signal from which the feedback signal is removed; a unit that equalizes the demodulated signal to remove noise, a multipath signal, and the remaining feedback signal therefrom; a unit that inserts the identification signal into the equalized signal; and a unit that modulates the signal having the identification signal inserted thereinto and transmits the modulated signal. According to the present invention, the repeating apparatus repeats output signals that have a small time delay and whose distortion is corrected. Therefore, it is possible to improve the utilization of limited frequency sources, and reduce investment in achieving a repeating apparatus.

    Downloadable conditional access system server and digital multimedia broadcasting terminal, and method for providing downloadable conditional access system service
    42.
    发明公开
    Downloadable conditional access system server and digital multimedia broadcasting terminal, and method for providing downloadable conditional access system service 有权
    可下载的条件访问系统服务器和数字多媒体广播终端以及提供可下载的条件访问系统服务的方法

    公开(公告)号：KR20100117248A

    公开(公告)日：2010-11-03

    申请号：KR20090035893

    申请日：2009-04-24

    Applicant: KOREA ELECTRONICS TELECOMM

    Inventor： JEONG YOUNG HO ,  KWON OH YUNG ,  LEE SOO IN

    IPC: H04W4/06 ,  H04N7/173 ,  H04W8/20 ,  H04W12/06

    CPC classification number: H04H60/15 ,  H04H20/57 ,  H04H60/91 ,  H04L9/3215 ,  H04L9/3273 ,  H04L2209/56 ,  H04L2209/603 ,  H04L2209/80 ,  H04N7/17318 ,  H04N21/25816 ,  H04N21/41407 ,  H04N21/4623 ,  H04N21/6581 ,  H04N21/8193 ,  H04W12/06

    Abstract: PURPOSE: A downloadable conditional access system server, a digital multimedia broadcasting terminal, and a method for providing downloadable conditional access system service are provided to offer a DCAS solution using a DMB net and a mobile radio communication network. CONSTITUTION: A message transfer part(311) transmits a DCAS message including the DCAS information through a first data channel to a DMB terminal. An image transmitting portion(312) transmits the common conditional access client image through a second data channel to the DMB terminal. The DMB terminal requests the personalization information related through a mobile communication channel to the operation of the common conditional access client image. An information transfer part(313) processes the authentication about the DMB terminal. The information transfer part transmits the personalization information through the mobile communication channel to the DMB terminal.

    Abstract translation: 目的：提供可下载条件访问系统服务器，数字多媒体广播终端和提供可下载条件访问系统服务的方法，以提供使用DMB网络和移动无线电通信网络的DCAS解决方案。 构成：消息传送部（311）通过第一数据信道向DMB终端发送包含DCAS信息的DCAS消息。 图像发送部（312）通过第二数据信道将公共条件访问客户端图像发送到DMB终端。 DMB终端通过移动通信信道请求与普通条件访问客户端图像的操作相关的个性化信息。 信息传送部（313）处理关于DMB终端的认证。 信息传送部通过移动通信信道将个性化信息发送给DMB终端。

    Method and apparatus of decoding reed-solomon code
    46.
    发明公开
    Method and apparatus of decoding reed-solomon code 审中-公开
    解码REO-SOLOMON代码的方法和设备

    公开(公告)号：KR20120049432A

    公开(公告)日：2012-05-17

    申请号：KR20100110299

    申请日：2010-11-08

    Applicant: KOREA ELECTRONICS TELECOMM

    Inventor： RA SANG JUNG ,  LEE JAE HO ,  CHOI GONG JOON ,  LEE SOO IN

    IPC: H03M13/00 ,  H03M13/15

    CPC classification number: H03M13/1515 ,  H03M13/1535 ,  H03M13/6502 ,  H03M13/6508

    Abstract: PURPOSE: A method and an apparatus for decoding a Reed-Solomon code are provided to efficiently decode a Reed-Solomon code by controlling the number of a modified Euclidean algorithm block and RAMs(Random Access Memory) according to the length of a code word demanded in a system. CONSTITUTION: A syndrome calculation block(110) calculates a syndrome for a received code word. One or more modified Eculid algorithm block(120) perform modified Euclidean algorithm calculation. An error location block(130) determines the location of errors based on the result of the modified Euclidean algorithm calculation. An error evaluation block(140) determines the value of the errors based on the result of the modified Euclidean algorithm calculation. An error compensation block(160) compensates for the errors based on a received code word and the determined location of errors and the value of the errors. One or more RAMs(Random Access Memory)(170) store the received code word. A control block(100) determines the number of one or more modified Eculid algorithm blocks and the number of one or more RAMs.

    Abstract translation: 目的：提供用于解码里德 - 所罗门码的方法和装置，以通过根据所要求的码字的长度控制修改的欧几里得算法块和RAM（随机存取存储器）的数量来有效地解码里德 - 所罗门码 在系统中。 构成：校正子计算块（110）计算接收到的代码字的校正子。 一个或多个修改的Eculid算法块（120）执行修改的欧几里德算法计算。 错误位置块（130）基于修改的欧几里德算法计算的结果来确定错误的位置。 错误评估块（140）基于修改的欧几里得算法的结果来确定错误的值。 误差补偿块（160）根据接收的码字和所确定的误差位置和误差值来补偿错误。 一个或多个RAM（随机存取存储器）（170）存储所接收的码字。 控制块（100）确定一个或多个修改的Eculid算法块的数量和一个或多个RAM的数量。

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