公开(公告)号：KR100556828B1

公开(公告)日：2006-03-10

申请号：KR1020030098272

申请日：2003-12-27

Applicant: 한국전자통신연구원

Inventor： 구한승 ,  권오형 ,  이수인

IPC: H04N21/6334 ,  H04N7/10

CPC classification number: H04L9/0825 ,  G06Q20/102 ,  G06Q40/12 ,  H04L9/0844 ,  H04L9/3247 ,  H04N7/1675 ,  H04N7/17309 ,  H04N7/17363 ,  H04N21/2543 ,  H04N21/25816 ,  H04N21/4181 ,  H04N21/47202 ,  H04N21/475 ,  H04N21/482 ,  H04N21/63345

Abstract: A method for subscribing a service and distributing encryption key based on public-key encryption algorithm in a digital CATV system are disclosed. In accordance with an aspect of the present invention, there is provided a method including the steps of: a) generating a charged service application message; b) generating a session connection request message, signing based on a digital signature scheme with appendix on the session connection request message and transmitting to the head-end; c) generating a symmetric-based session key, signing a digital signature on the key, encrypting based on a public-key of the subscriber, transmitting the session key to the subscriber; decrypting the session key message, verifying the digital signature, extracting the session key from the session key message and storing at a Condition Access Module; and d) signing a digital signature on the charged service request message, encrypting using the extracted session key and transmitting to the head-end.

公开(公告)号：KR1020040056481A

公开(公告)日：2004-07-01

申请号：KR1020020082868

申请日：2002-12-23

Applicant: 한국전자통신연구원

Inventor： 조용성 ,  정준영 ,  권오형 ,  안치득

IPC: H04N21/462 ,  H04N7/10

CPC classification number: H04N21/4181 ,  H04N7/163 ,  H04N7/1675 ,  H04N7/17318 ,  H04N21/23608 ,  H04N21/26606 ,  H04N21/4345 ,  H04N21/4623 ,  H04N21/6118 ,  H04N21/6168

Abstract: PURPOSE: A conditional access system of a digital cable broadcasting system and a receiving system and method using the conditional access system are provided to conditionally receive broadcast using DVS-167 or DOCSIS as an out-of-band channel transmission method. CONSTITUTION: A conditional access system includes a demultiplexer(322), an out-of-band channel signal processor(323), a conditional access processor(325), and a multiplexer(321). The demultiplexer receives broadcast data transmitted through an in-band channel and an ECM(Entitlement Control Message) including a control word from a subscriber receiver(310) and demultiplexes the broadcast data and the ECM. The out-of-band channel signal processor receives an EMM(Entitlement Management Message) transmitted through an out-of-band channel from the subscriber receiver and processes the EMM. The conditional access processor descrambles scrambled broadcast data using the EMC and EMM. The multiplexer multiplexes the descrambled broadcast data and provides the multiplexed broadcast data to the subscriber receiver.

Abstract translation: 目的：提供数字有线广播系统的条件接收系统和使用条件接收系统的接收系统和方法，以有条件地接收使用DVS-167或DOCSIS作为带外信道传输方法的广播。 构成：条件访问系统包括解复用器（322），带外信道信号处理器（323），条件访问处理器（325）和多路复用器（321）。 解复用器接收通过带内信道发送的广播数据和包括来自用户接收机（310）的控制字的ECM（授权控制消息），并且解复用广播数据和ECM。 带外信道信号处理器从用户接收机接收通过带外信道发送的EMM（授权管理消息），并处理EMM。 条件访问处理器使用EMC和EMM解扰加扰的广播数据。 复用器复用解扰的广播数据，并将多路复用的广播数据提供给用户接收机。

公开(公告)号：KR1020040050561A

公开(公告)日：2004-06-16

申请号：KR1020020078415

申请日：2002-12-10

Applicant: 한국전자통신연구원

Inventor： 권은정 ,  김태균 ,  구한승 ,  권오형 ,  안치득

IPC: H04N5/44 ,  H04N5/63

CPC classification number: H04N21/4623 ,  H04N21/441

Abstract: PURPOSE: A method for converting an EMM(Entitlement Management Message) in a CAS(Conditional Access System) with a PKI(Public Key Infrastructure) is provided to solve problems of a CAS with a symmetric key scheme. CONSTITUTION: A CAS(207) connects to a subscriber management system(206), reads each subscriber information from a database through the subscriber management system(206), and transmits subscriber information to a CA(Certificate Authority) server(202) according to a certificate policy. The CAS(207) transmits a certificate request form including a public key of electronic signature keys stored in the database to the CA server(202). The subscriber management system(206) records a certificate issued from the CA server(202) and a subscriber's private key stored in the database in a conditional access module through a recording device(204).

Abstract translation: 目的：提供一种使用PKI（公钥基础设施）转换CAS（条件访问系统）中的EMM（授权管理消息）的方法，以解决具有对称密钥方案的CAS的问题。 构成：CAS（207）连接到用户管理系统（206），通过用户管理系统（206）从数据库读取每个用户信息，并根据所述用户信息向CA（认证中心）服务器（202）发送用户信息 证书政策。 CAS（207）将存储在数据库中的包括电子签名密钥的公开密钥的证书请求表发送到CA服务器（202）。 订户管理系统（206）通过记录设备（204）将从CA服务器（202）发出的证书和存储在数据库中的用户私钥记录在条件访问模块中。

公开(公告)号：KR100430525B1

公开(公告)日：2004-05-10

申请号：KR1020010080007

申请日：2001-12-17

Applicant: 한국전자통신연구원

Inventor： 구한승 ,  배병준 ,  조용성 ,  이진환 ,  권오형 ,  안치득

IPC: H04N7/10

CPC classification number: H04N7/1675 ,  H04N21/4344 ,  H04N21/44055

Abstract: Disclosed is an apparatus and method for processing transport streams (TSs) and a delay-controlling apparatus that assigns a predetermined delay to MPEG-2 TS packets fed into a POD module in a digital cable broadcasting system, irrespective of a time delay caused by descrambling scrambled input TS packets, the apparatus including: a demultiplexer for receiving TSs and dividing them into scrambled and non-scrambled data; a descrambler controller for receiving the scrambled data from the demultiplexer and descrambling it; a delay controller for receiving the non-scrambled data from the demultiplexer and the descrambled data from the descrambler controller and delaying them by a predetermined time; and a remultiplexer for receiving the data from the delay controller, multiplexing them, and outputting the multiplexed data in the TS format.

Abstract translation: 公开了一种用于处理传输流（TS）的设备和方法，以及延迟控制设备，该设备和方法对馈送到数字有线广播系统中的POD模块的MPEG-2TS分组分配预定的延迟，而不考虑由解扰引起的时间延迟 加扰输入TS分组，该设备包括：解复用器，用于接收TS并将它们分成加扰数据和非加扰数据; 解扰器控制器，用于接收来自解复用器的加扰数据并对其解扰; 延迟控制器，用于接收来自解复用器的非加扰数据和来自解扰器控制器的解扰数据并将它们延迟预定时间; 以及再分时器，用于从延时控制器接收数据，对它们进行复用，并以TS格式输出复用数据。

公开(公告)号：KR1020040009099A

公开(公告)日：2004-01-31

申请号：KR1020020042931

申请日：2002-07-22

Applicant: 한국전자통신연구원

Inventor： 배병준 ,  이진환 ,  최준영 ,  함영권 ,  권오형 ,  안치득

IPC: H04N21/4402

CPC classification number: H04N21/2335 ,  H04N21/23406 ,  H04N21/2355 ,  H04N21/23608 ,  H04N21/8126

Abstract: PURPOSE: A device for converting contents and a method thereof are provided to use contents manufactured adapted to a specific standard in a digital broadcasting system which is adapted to other standard. CONSTITUTION: A demultiplexing unit(10) demultiplexes an inputted digital broadcasting stream(BS1) and classifies the digital broadcasting stream(BS1) into a video stream(VS1), an audio stream(OS1), a broadcasting protocol stream(PS1), and a data stream(DS1). A conversion unit(20) converts each classified and inputted stream adapted to a standard to be broadcasted. A multiplexing unit(30) multiplexes each converted stream and a corresponding broadcasting protocol stream. A protocol server(40) supplies the broadcasting protocol stream corresponded to the broadcasting standard to the multiplexing unit(30). Because the video stream(VS1) is used as the same standard in each broadcasting stream, the audio stream(OS1), the broadcasting protocol stream(PS1), and the data stream(DS1) are converted only.

Abstract translation: 目的：提供一种用于转换内容的装置及其方法，以使用适合于其他标准的数字广播系统中适用于特定标准的内容。 解决方案：解复用单元（10）对输入的数字广播流（BS1）进行解复用，并将数字广播流（BS1）分类为视频流（VS1），音频流（OS1），广播协议流（PS1）和 数据流（DS1）。 转换单元（20）转换适合于要广播的标准的分类和输入的流。 复用单元（30）对每个转换的流和相应的广播协议流进行复用。 协议服务器（40）将与广播标准对应的广播协议流提供给多路复用单元（30）。 由于视频流（VS1）在每个广播流中被用作相同的标准，音频流（OS1），广播协议流（PS1）和数据流（DS1）仅被转换。

公开(公告)号：KR1020030056306A

公开(公告)日：2003-07-04

申请号：KR1020010086505

申请日：2001-12-28

Applicant: 한국전자통신연구원

Inventor： 조용성 ,  구한승 ,  권오형 ,  안치득

IPC: H04N21/4405 ,  H04N7/10

CPC classification number: H04N21/42623 ,  H04N7/163 ,  H04N7/1675 ,  H04N21/43856

Abstract: PURPOSE: A system and method for descrambling transport stream data are provided to descramble TS packet data inputted to a point of deployment module. CONSTITUTION: A system for descrambling transport stream data includes a transport stream packet input unit(20), a descrambling controller(30), and a descrambler(50). The transport stream packet input unit judges whether or not the transport stream data is descrambled using a header value of the TS packet data and outputs the judged result and TS packet data. The descrambling controller outputs a control signal to the TS packet input unit to allow the TS packet input unit to read the TS packet data and outputs a scrambling judgement signal according to the judged result. The descrambler judges whether or not the TS packet data is scrambled according to the scrambling judgement signal to vary descrambling process.

Abstract translation: 目的：提供一种用于解扰传输流数据的系统和方法，用于解密输入到部署模块点的TS分组数据。 构成：用于解扰传输流数据的系统包括传输流分组输入单元（20），解扰控制器（30）和解扰器（50）。 传输流分组输入单元使用TS分组数据的报头值判断传输流数据是否被解扰，并输出判断结果和TS分组数据。 解扰控制器向TS分组输入单元输出控制信号，以允许TS分组输入单元读取TS分组数据，并根据判断结果输出加扰判断信号。 解扰器根据加扰判断信号判断TS分组数据是否被加密，以改变解扰过程。

公开(公告)号：KR1020030039912A

公开(公告)日：2003-05-22

申请号：KR1020010071306

申请日：2001-11-16

Applicant: 한국전자통신연구원

Inventor： 권은정 ,  권오형 ,  안치득

IPC: H04L12/58

CPC classification number: H04L29/06 ,  H04L67/02 ,  H04L67/20 ,  H04L67/34

Abstract: PURPOSE: A system and a method for processing message statistics are provided to generate an XML(eXtensible Markup Language) type of target file by considering the architecture of real data, for downstream and upstream messages flowing through a network controller connected between an IP(Internet Protocol) network and a cable network, and to store a result value of statistical data in a target table through parsing by elements to confirm the value of the target table. CONSTITUTION: A transceived message collector(21) collects upstream and downstream messages of a network controller. A database(24) stores data. A transceived message storage(22) stores the messages collected in the transceived message collector(21), if the collected messages exceed a predetermined amount. A statistical function executor(23) processes statistics of the messages stored in the database(24) through the function defined by a user. A statistical result storage(25) converts an executed result of the statistical function executor(23) into an XML file, to store the file in the database(24) as a target table. And a main memory(30) stores a result of the statistics processing by the statistical function executor(23).

Abstract translation: 目的：提供一种用于处理消息统计信息的系统和方法，通过考虑实际数据的体系结构来生成XML（可扩展标记语言）类型的目标文件，用于通过连接在IP（Internet 协议）网络和有线网络，并通过元素解析来将统计数据的结果值存储在目标表中，以确认目标表的值。 构成：收发消息收集器（21）收集网络控制器的上行和下行消息。 数据库（24）存储数据。 如果收集的消息超过预定量，则收发消息存储器（22）存储收集在收发消息收集器（21）中的消息。 统计功能执行器（23）通过由用户定义的功能来处理存储在数据库（24）中的消息的统计信息。 统计结果存储（25）将统计功能执行器（23）的执行结果转换为XML文件，将该文件存储在数据库（24）中作为目标表。 并且主存储器（30）存储由统计功能执行器（23）进行的统计处理的结果。

公开(公告)号：KR1020030037359A

公开(公告)日：2003-05-14

申请号：KR1020010067867

申请日：2001-11-01

Applicant: 한국전자통신연구원

Inventor： 정준영 ,  최준영 ,  배병준 ,  권오형 ,  안치득

IPC: H04N7/10

CPC classification number: H04H20/78 ,  H04H40/90 ,  H04N7/10 ,  H04N21/23608 ,  H04N21/2362 ,  H04N21/2381 ,  H04N21/2665 ,  H04N21/6118

Abstract: PURPOSE: A program and system information protocol(PSIP) converting apparatus and method and a digital cable television broadcasting system using the PSIP converting apparatus are provided to convert PSIP of ground-wave broadcast and SI protocol of satellite broadcast into PSIP in cable broadcasting format in real time. CONSTITUTION: A PSIP converting apparatus includes a protocol data extraction unit(202), a protocol data conversion unit(203), a protocol data insertion unit(204), and a system controller(207). The protocol data extraction unit demultiplexes a digital ground-wave broadcast transport stream or satellite broadcast transport stream to extract A/V data and PSIP/PSI from the ground-wave broadcast transport stream and to extract A/V data and SI/PSI data from the satellite broadcast transport stream. The protocol data conversion unit generates PSIP/PSI data in a digital cable TV broadcast format, corresponding to the extracted PSIP/PSI data or SI/PSI data. The protocol data insertion unit inserts the PSIP/PSI data in the digital cable TV broadcast format into the extracted A/V data to generate a digital cable broadcast transport stream. The system controller controls the operations of the units.

Abstract translation: 目的：提供一种使用PSIP转换装置的程序和系统信息协议（PSIP）转换装置和方法以及数字有线电视广播系统，用于将地面广播的PSIP和卫星广播的SI协议以有线广播格式转换为PSIP 即时的。 构成：PSIP转换装置包括协议数据提取单元（202），协议数据转换单元（203），协议数据插入单元（204）和系统控制器（207）。 协议数据提取单元解复用数字地面波广播传输流或卫星广播传输流，从地波广播传输流中提取A / V数据和PSIP / PSI，并从A / V数据和SI / PSI数据中提取A / V数据和SI / PSI数据 卫星广播传输流。 协议数据转换单元以对应于提取的PSIP / PSI数据或SI / PSI数据的数字有线电视广播格式生成PSIP / PSI数据。 协议数据插入单元将数字有线电视广播格式的PSIP / PSI数据插入到提取的A / V数据中，以生成数字有线广播传输流。 系统控制器控制单元的操作。

公开(公告)号：KR100236965B1

公开(公告)日：2000-01-15

申请号：KR1019970064083

申请日：1997-11-28

Applicant: 한국전자통신연구원

Inventor： 권오형 ,  채종석

IPC: H04L12/28

CPC classification number: H04L1/0057 ,  H03M13/35 ,  H04L1/0041 ,  H04L1/0045 ,  H04L1/0072 ,  H04L12/5601 ,  H04L2012/5652

Abstract: 1. 청구범위에 기재된 발명이 속한 기술분야
본 발명은 비동기전달모드 헤더를 보호하기 위한 연집 오류 처리 장치 및 그 방법에 관한 것임.
2. 발명이 해결하려고 하는 기술적 과제
본 발명은, 기존 ATM 셀 구조의 변경없이 리드-솔로몬(Reed-Solomon) 오류 정정 부호를 이용하여 잡음이 연집 오류 특성을 나타내는 채널에서의 비동기전달모드 헤더를 보호하기 위한 연집 오류 처리 장치 및 그 방법을 제공하고자 함.
3. 발명의 해결방법의 요지
본 발명은, 비동기전달모드 셀의 카운터값을 초기화시키는 제 1 단계; 입력된 비동기전달모드 셀을 분리하고, 헤더 오류 정정 바이트를 이용하여 비동기전달모드 헤더의 오류수에 따라 셀을 폐기하거나 비동기전달모드 헤더를 정정한 후, 오류 정정 코드를 부호화하는 제 2 단계; 및 재배열된 물리계층 수렴 프로토콜 프레임을 출력하는 제 3 단계를 포함한다
4. 발명의 중요한 용도
본 발명은 ATM 헤더를 보호하기 위한 시스템 등에 이용됨.

公开(公告)号：KR100053557B1

公开(公告)日：1992-08-04

申请号：KR1019890019686

申请日：1989-12-27

Applicant: 한국전자통신연구원

Inventor： 권오형

IPC: G05F3/00