公开(公告)号：KR100594599B1

公开(公告)日：2006-06-30

申请号：KR1020040051665

申请日：2004-07-02

Applicant: 한국전자통신연구원 ,  충북대학교 산학협력단

Inventor： 이도훈 ,  이인성 ,  황정준 ,  양해용 ,  유상경 ,  황인호

IPC: H04L1/00 ,  G10L19/00 ,  H04L12/70

Abstract: 본 발명은 CELP 음성 부호화기를 이용한 패킷교환망이나 공중교환망을 통한 멀티미디어 서비스에서 패킷 손실 발생시 수신단에서 손실 패킷을 복구하는 방법에 관한 것이다. 손실 패킷 복구를 위해 선형예측 계수와 잔여 신호를 각각 보간하며, 미래 패킷을 사용할 수 없는 경우와 사용할 수 있는 경우로 구분하여 보간한다. 미래 패킷이 손실이면, 과거 데이터만을 가지고 복구하고, 미래 패킷이 정상적으로 수신되면 미래 데이터와 과거 데이터를 이용하여 손실 패킷을 보간한다. CELP 부호화기의 선형 예측 계수와 잔여 신호를 각각 보간한 뒤 합성하여 손실 프레임의 오디오 데이터를 복구 한다. CELP 부호화기의 비트스트림 정보를 이용하므로 많은 연산과정이 필요하지 않으며, CELP 부호화기에 보다 적합하게 구현할 수 있다. 또한, 손실 패킷 전과 후 프레임을 이용하므로 보다 정확하게 복구할 수 있으며, 선형예측 계수를 보간함으로써 연속손실 발생시 음질을 향상시킬 수 있다.
패킷 손실, LP 계수, 피치, OLA(OverLap and Add), 보간

Abstract translation: 本发明涉及一种用于在分组交换网络中使用CELP语音编码器或通过公共交换网络的多媒体服务在分组丢失中恢复接收端处的丢失分组的方法。 为了恢复丢失的分组，线性预测系数和残差信号分别被内插，并且通过划分未来分组不能被使用的情况和可以使用的情况来执行内插。 如果将来的分组丢失，只有过去的数据被恢复，并且如果将来的分组被正常接收，则使用未来的数据和过去的数据来插入丢失的分组。 将CELP编码器的线性预测系数和残差信号分别插入然后合成以恢复丢失帧的音频数据。 由于使用了CELP编码器的比特流信息，因此不需要大量的计算处理，并且它可以更适当地在CELP编码器中实现。 另外，由于在丢失分组之前和之后使用帧，所以当通过内插线性预测系数产生连续丢失时，可以更准确地恢复其帧，并且可以改善音质。

公开(公告)号：KR1020050020039A

公开(公告)日：2005-03-04

申请号：KR1020030057681

申请日：2003-08-20

Applicant: 한국전자통신연구원

Inventor： 김기홍 ,  이승수 ,  황인호

IPC: H04L7/04

Abstract: PURPOSE: A resynchronization method of a synchronous information security system is provided to reduce a time required for resynchronization by using forcefully changed initial vector values shared in an overall system rather than using changed key streams. CONSTITUTION: An initial vector is generated(502) and transmitted(503) to a counterpart system for the systems to share(504) the same data. A security communication between the systems is initialized(505) by using the shared initial vector. When a frame error occurs in wired and wireless communication atmosphere during the security communication, the initial vector shared by the systems is forcefully changed according to a predetermined way to resynchronize the overall system(508). The changed initial vector is used to perform the initialization of the security communication.

Abstract translation: 目的：提供同步信息安全系统的再同步方法，通过使用在整个系统中共享的强制更改的初始向量值来减少重新同步所需的时间，而不是使用已更改的密钥流。 构成：生成初始向量（502）并发送（503）到对方系统，以使系统共享（504）相同的数据。 通过使用共享初始向量来初始化系统之间的安全通信（505）。 当在安全通信期间在有线和无线通信气氛中发生帧错误时，系统共享的初始向量根据预定的方式被强制地改变以重新同步整个系统（508）。 改变的初始向量用于执行安全通信的初始化。

公开(公告)号：KR100442590B1

公开(公告)日：2004-08-02

申请号：KR1020020028854

申请日：2002-05-24

Applicant: 한국전자통신연구원

Inventor： 이상이 ,  원종진 ,  장병화 ,  황인호

IPC: G06F12/14

Abstract: PURPOSE: A tamper resistance device and a method for operating the same are provided to prevent data stored in a memory of an electronic device from being flowed out by an attack from an exterior or an illegal treatment. CONSTITUTION: An electronic device has a processor(114) which stores data in a memory(115) or reads/processes stored data. The electronic device is covered by an instrument(101). A luminous element(103) for emitting a light to an internal surface is included in the instrument(101). A light(109) emitted from the luminous element(103) is contacted with an internal surface(102) of the instrument(101) and the electronic device and dispersed to two-dimensional space or three-dimensional space. A partial portion of the dispersed light is collected in a light receiving element(111). An amount of a light collected to the light receiving element(111) is measured by a measuring device(112) and compared with a critical value in a comparator(113). In the case that the measured light amount is beyond tolerance, the comparator(113) outputs a predetermined signal to the processor(114). The processor(114) deletes data stored in the memory(115) in accordance with a signal from the comparator(113). The luminous element(103) is operated by a voltage being applied from an external power(107) or an internal power(106). If a level of the voltage become low or the power is stopped, a voltage comparison circuit(108) senses the variation and supplies a power from the internal power(106). A variable resistor(104) applies a power being supplied from the external power(107) or the internal power(106) to the luminous element(103) fixedly. The variable resistor(104) is controlled by a signal generated from a variable generator(105).

Abstract translation: 目的：提供防篡改装置及其操作方法，以防止存储在电子装置的存储器中的数据由于来自外部的攻击或非法处理而流出。 构成：电子设备具有将数据存储在存储器（115）中或读取/处理存储的数据的处理器（114）。 电子设备被仪器（101）覆盖。 器械（101）中包括用于将光发射到内表面的发光元件（103）。 从发光元件（103）发射的光（109）与器械（101）的内表面（102）和电子装置接触并分散到二维空间或三维空间。 分散的光的一部分被收集在光接收元件（111）中。 收集到光接收元件（111）的光量由测量装置（112）测量，并与比较器（113）中的临界值进行比较。 在测量的光量超出容限的情况下，比较器（113）向处理器（114）输出预定信号。 处理器（114）根据来自比较器（113）的信号，删除存储在存储器（115）中的数据。 发光元件（103）通过从外部电源（107）或内部电源（106）施加的电压而工作。 如果电压的电平变低或电力停止，则电压比较电路（108）感测该变化并从内部电力（106）供应电力。 可变电阻器（104）将从外部电源（107）或内部电源（106）供应的电力固定地施加到发光元件（103）。 可变电阻器（104）由可变发生器（105）产生的信号控制。

公开(公告)号：KR1020040032493A

公开(公告)日：2004-04-17

申请号：KR1020020061668

申请日：2002-10-10

Applicant: 한국전자통신연구원

Inventor： 이승수 ,  김기홍 ,  황인호 ,  고재영

IPC: H04L7/00

CPC classification number: H04L27/2656 ,  H04L7/0016 ,  H04L7/042

Abstract: PURPOSE: An apparatus and a method for detecting a multi-frame synchronization failure are provided to detect the synchronization failure for all transmission speeds by deciding a state of the synchronization failure from a received serial data stream without the transmission speed and the synchronization position information. CONSTITUTION: An apparatus for detecting a failure of multi-frame synchronization includes a multi-frame clock generation unit(202), a multiple FAS detection unit(206), a synchronization failure decision unit(208), a data stream order control unit(210), a data stream control unit(204), and a synchronization failure detection unit(212). The multi-frame clock generation unit(202) divides an input clock according to each frame structure. The multiple FAS detection unit(206) detects the frame synchronization information of the multi-frame clock generation unit from a data stream of the data stream control unit. The synchronization failure decision unit(208) compares the frame synchronization information to an FAS pattern. The data stream order control unit(210) increases or maintains an order control counter value of the data stream according to a receiving state of a failure signal from the synchronization failure decision unit. The data stream control unit(204) controls the data stream of the second input terminal according to the control signal of the data stream order control unit. The synchronization failure detection unit(212) decides the failure of the synchronization when the number of failure signals exceeds the reference value.

Abstract translation: 目的：提供一种用于检测多帧同步故障的装置和方法，用于通过从接收到的串行数据流中确定同步故障的状态来检测所有传输速度的同步故障，而不需要传输速度和同步位置信息。 检测多帧同步故障的装置包括多帧时钟生成单元（202），多个FAS检测单元（206），同步失败判定单元（208），数据流顺序控制单元 210），数据流控制单元（204）和同步失败检测单元（212）。 多帧时钟生成部（202）根据各帧结构分割输入时钟。 多个FAS检测单元（206）从数据流控制单元的数据流检测多帧时钟生成单元的帧同步信息。 同步失败判定部（208）将帧同步信息与FAS模式进行比较。 数据流顺序控制单元根据来自同步失败判定单元的故障信号的接收状态增加或维持数据流的顺序控制计数器值。 数据流控制单元（204）根据数据流顺序控制单元的控制信号控制第二输入终端的数据流。 当故障信号的数量超过参考值时，同步故障检测单元（212）确定同步的故障。

公开(公告)号：KR100380518B1

公开(公告)日：2003-04-18

申请号：KR1020010028600

申请日：2001-05-24

Applicant: 한국전자통신연구원

Inventor： 이상이 ,  장병화 ,  원종진 ,  황인호

IPC: H04B7/26

CPC classification number: H04W12/02 ,  H04L63/0428 ,  H04L63/0471 ,  H04M1/68 ,  H04M1/72502 ,  H04M1/7253 ,  H04M2250/02 ,  H04W4/18 ,  H04W28/06 ,  H04W84/18 ,  H04W88/02

Abstract: The present invention relates to a security codeless telephone unit using bluetooth and communication method using the same. According to the present invention, a communication of a body of a codeless telephone in a portable device of a security codeless telephone with a portable device in a counterpart codeless telephone via a network is safely secured from a wiretapping. In order to accomplish this, the security codeless telephone unit according to the present invention includes the codeless telephone body and a portable device both of which are connected via bluetooth for allowing voice or data communication mode. Thus, if there is a request for switching a security mode from the portable device or the body, the portable device converts voice signals into encrypted digital signals using a voice codec, a vocoder and an encryption module. The portable device then transmits the encrypted digital signals to the body using the bluetooth the mode is changed from a voice communication mode to a data communication mode. Next, the body transmits the encrypted digital data to counterpart codeless telephone body and portable device via a network using a data modem. Therefore, the present invention can secure a safe communication from a wiretapping while securing the activity of a user.

Abstract translation: 本发明涉及一种使用蓝牙的安全无代码电话单元及使用其的通信方法。 根据本发明，安全无代码电话的便携式设备中的无代码电话的本体与便携式设备通过网络在对方无代码电话中的通信可以安全地免于窃听。 为了实现这一点，根据本发明的安全无编码电话单元包括无代码电话主体和便携式设备，二者都通过蓝牙连接以允许语音或数据通信模式。 因此，如果存在从便携式设备或身体切换安全模式的请求，则便携式设备使用语音编解码器，声码器和加密模块将语音信号转换为加密的数字信号。 便携式设备然后使用蓝牙将加密的数字信号发送到身体，模式从语音通信模式改变为数据通信模式。 接着，身体通过使用数据调制解调器的网络将加密的数字数据发送给对方无代码电话本体和便携式装置。 因此，本发明能够在确保用户的活动的同时确保来自窃听的安全通信。