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公开(公告)号：KR100896795B1
公开(公告)日：2009-05-11
申请号：KR1020070119096
申请日：2007-11-21
Applicant: 한국전자통신연구원
CPC classification number: H04B7/15528
Abstract: 입력 주파수와 출력 주파수가 상이한 중계기는 상기 입력 주파수로 수신되는 수신 신호를 중간 주파수 변환용 국부 발진 주파수에 근거하여 제1 중간 주파수 신호로 변환하고, 제1 중간 주파수 신호를 디지털 처리하여 제2 중간 주파수 신호로 변환한다. 그런 후에, 입력 주파수와 출력 주파수의 차에 해당하는 제1 주파수 톤 신호를 생성하고, 중간 주파수 변환용 국부 발진 주파수 및 생성된 제1 주파수 톤 신호로부터 제2 주파수 톤 신호를 생성한다. 이렇게 생성된 제2 주파수 톤 신호에 근거하여 제2 중간 주파수 신호를 출력 주파수로 상향 변환하여 송신 신호를 송출한다.
중계기, 주파수, 국부 발진 주파수, 동기-
公开(公告)号：KR1020090042763A
公开(公告)日：2009-04-30
申请号：KR1020090002405
申请日：2009-01-12
Applicant: 한국전자통신연구원
CPC classification number: H03M1/662 , H03M2201/173 , H03M2201/30 , H04H20/65 , H04N21/435
Abstract: A transmission method and a device, and a recording medium and a receiving device of digital broadcasting signal are provided to offer different transmission modes for frequency domain and time domain respectively. An allocation unit assigns more than one sub-band and more than one symbol to a modulated service data which is outputted from M digital modulator(S430). An IFFT(Inverse Fast Fourier Transform) converts a signal of a frequency domain to a signal of the time domain about the M service data outputted from the sub-band allocation unit(S440). A frame generator generates a plurality of symbol durations into a frame body of one transfer frame(S450). The frame generator generates a frame header which includes the information about each of M services(S460). A D/A converter converts a transfer frame of a digital signal outputted from the frame generator into an analog signal(S470). The D/A converter transmits the transfer frame converted into an analog signal to a receiving device.
Abstract translation: 提供传输方法和装置，以及数字广播信号的记录介质和接收装置，以分别为频域和时域提供不同的传输模式。 分配单元向从M数字调制器输出的调制业务数据分配多于一个子带和多于一个符号（S430）。 IFFT（逆快速傅里叶变换）将频域的信号转换为关于从子带分配单元输出的M服务数据的时域的信号（S440）。 帧生成器将多个符号持续时间生成到一个传送帧的帧体中（S450）。 帧生成器生成包括关于每个M服务的信息的帧头（S460）。 D / A转换器将从帧发生器输出的数字信号的传送帧转换为模拟信号（S470）。 D / A转换器将转换成模拟信号的传送帧发送到接收设备。
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公开(公告)号：KR1020090041905A
公开(公告)日：2009-04-29
申请号：KR1020070107683
申请日：2007-10-25
Applicant: 한국전자통신연구원
CPC classification number: H04N21/4382 , H04L12/2801 , H04N7/104 , H04N21/2383 , H04N21/438 , H04N21/6118 , H04N21/64784
Abstract: An apparatus and a method of receiving channel bonding to expand a channel bonding receiving band are provided to expand a channel bonding receiving band range by using physical layer front-ends and a channel routing unit. A channel boding separation unit(21,22) divides a channel bonded broadband signal into a plurality of band signals. The channel boding separation unit extracts a corresponding channel bonding signal per the divided band signal. A channel routing unit(23) sets a path of the channel bonding signal to transmit the extracted channel bonding signal to a corresponding demodulator. The channel boding separation unit comprises a broadband RF tuner(211,221), A/D converters(Analog to Digital Converter)(212,222) and digital channelizers(213,223). The broadband RF tuner separates a band signal of a specific frequency range from a cable signal.
Abstract translation: 提供一种接收信道绑定以扩展信道绑定接收频带的装置和方法，以通过使用物理层前端和信道路由单元来扩展信道绑定接收频带范围。 信道编码分离单元（21,22）将信道绑定宽带信号划分为多个频带信号。 信道编码分离单元根据分频带信号提取对应的信道绑定信号。 信道路由单元（23）设置信道绑定信号的路径，将所提取的信道绑定信号发送到对应的解调器。 信道编码分离单元包括宽带RF调谐器（211,221），A / D转换器（模数转换器）（212,222）和数字信道化器（213,223）。 宽带RF调谐器将特定频率范围的频带信号与电缆信号分离。
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公开(公告)号：KR1020090035427A
公开(公告)日：2009-04-09
申请号：KR1020080095539
申请日：2008-09-29
Applicant: 한국전자통신연구원
IPC: H04N19/132 , H04N19/51 , H04N13/00
CPC classification number: H04N19/59 , H04N19/122 , H04N19/51 , H04N19/597 , H04N19/70
Abstract: A multi-view and single view video encoding/decoding method and an apparatus thereof for achieving efficient compression are provided to minimize the image degradation by reducing the number of blocks and decoding residual data. A bit stream generating unit(401) generates an auxiliary image as bit stream. An estimating unit inputs reference image for encoding the image. A movement and estimating unit performs the movement and estimation by using auxiliary image and reference frame. A residual data generating unit produces remaining data. A down sampling part(404) down-samples the residual data. A quantization unit(405) quantizes and converts the residual data into DCT(Discrete Cosine Transformation).
Abstract translation: 提供了用于实现高效压缩的多视点和单视图视频编码/解码方法及其装置，以通过减少块的数量和解码残差数据来最小化图像劣化。 比特流生成单元（401）生成作为比特流的辅助图像。 估计单元输入用于编码图像的参考图像。 移动和估计单元通过使用辅助图像和参考帧来执行移动和估计。 剩余数据生成单元产生剩余数据。 下采样部分（404）对剩余数据进行下采样。 量化单元（405）将剩余数据量化并转换成DCT（离散余弦变换）。
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公开(公告)号：KR100889561B1
公开(公告)日：2009-03-23
申请号：KR1020070061252
申请日：2007-06-21
Applicant: 한국전자통신연구원 , 서울과학기술대학교 산학협력단
IPC: H04N5/913
Abstract: 본 발명은 일정 시간 내에서 제로가 되는 제로상관구간(ZCD) 코드 및 낮은상관구간(LCD) 코드를 발생시켜 워터마킹함으로써, 송신기를 식별할 수 있는 제로상관구간 또는 낮은상관구간 확산 코드를 이용한 디지털 방송 신호 송신 장치 및 수신 장치와, 이의 송신 방법 및 수신 방법에 관한 것으로, 송신기를 식별하기 위한 코드를 워터마킹하여 전송하는 디지털 방송 신호 송신장치에 있어서, 일정시간구간 동안 연속적인 제로상관구간을 갖고 디지털 방송 데이터 필드에 절단오류없이 삽입될 수 있는 제로상관구간(ZCD) 코드 및 낮은상관구간(LCD) 코드를 생성하는 확산코드 생성수단; 수신기에서 상기 ZCD 코드 및 LCD 코드를 이용해 송신기를 인식할 수 있도록 변조된 방송 신호에 상기 확산코드 생성수단에 의해 생성된 ZCD 코드 및 LCD코드를 워터마킹하는 워터마킹수단; 및 상기 워터마킹된 방송 데이터를 방송 신호로 송출하는 방송신호 송출수단을 포함한다.
TxID, ZCD, 코드, LCD, 제로, 상관, 워터마킹, 디지털, 방송, 송신기, 식별-
Patent Agency Ranking
公开(公告)号：KR1020090014741A
公开(公告)日：2009-02-11
申请号：KR1020070078919
申请日：2007-08-07
Applicant: 한국전자통신연구원
CPC classification number: H04L27/2604 , H04L25/0224 , H04L27/2649
Abstract: An apparatus and a method for demodulation in a transmission system are provided to improve reception of an addition layer by using a pilot existing in an addition layer signal. A receiver(210) receives the signal in the form of a transfer frame and the signal comprises a phase reference symbol, a fast information channel and a main service channel. A pilot information storage unit(230) stores location information of a pilot included in the main service channel. A primary channel estimating unit(244) channel-estimates the phase reference symbol and outputs a primary channel estimated value. According to the channel estimated value of the phase reference symbol, the second channel estimating unit(245) channel-estimates the fast information channel and outputs the second channel estimated value. According to the channel estimated value on the basis of the location information of the pilot the fast information channel, a third channel estimating unit(246) channel-estimates the main service channel and outputs the third channel estimated value. According to the primary channel estimated value, the second channel estimated value and the third channel estimated value, a channel equalization part(247) channel-equalizes the signal and outputs a channel-equalized signal.
Abstract translation: 提供一种用于在传输系统中进行解调的装置和方法，以通过使用存在于加法层信号中的导频来改善加法层的接收。 接收机（210）以传送帧的形式接收信号，该信号包括相位参考符号，快速信息信道和主服务信道。 导频信息存储单元（230）存储主服务信道中包含的导频的位置信息。 主信道估计单元（244）信道估计相位参考符号并输出主信道估计值。 根据相位参考符号的信道估计值，第二信道估计单元（245）对快速信息信道进行信道估计，并输出第二信道估计值。 根据基于导频的快速信息信道的位置信息的信道估计值，第三信道估计单元（246）对主服务信道进行信道估计，并输出第三信道估计值。 根据主信道估计值，第二信道估计值和第三信道估计值，信道均衡部分（247）对信号进行信道均衡并输出信道均衡信号。
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公开(公告)号：KR100882508B1
公开(公告)日：2009-02-06
申请号：KR1020070121508
申请日：2007-11-27
Applicant: 한국전자통신연구원
IPC: H04N21/6334
CPC classification number: H04H60/14 , H04H2201/11 , H04N21/4341 , H04N21/4382
Abstract: An apparatus and a method for receiving advanced DMB(Digital Multimedia Broadcasting) conditional access by using hierarchical modulation are provided efficiently to charge a user for various services which are transmitted to an enhanced hierarchy when providing a high efficient paid DMB service to the user. A control monitoring unit selects a desired channel in an RF signal inputted through a reception RF(Radio Frequency) unit(S310). The control monitoring unit outputs the selected channel signal to an OFDM demodulator, and demodulates and outputs the channel signal by discriminating an enhanced hierarchy service from a basic hierarchy service based on symbol values which are confirmed at OFDM symbols(S320). A demultiplexer of the basic hierarchy and the enhanced hierarchy demultiplexes and outputs the inputted signal by each hierarchy and parses FIC data and MSC data(S330). An enhanced hierarchy data analyzer, a basic hierarchy data analyzer and a video service stream analyzer determines whether or not the descrambling process is necessary(S340,S350), and a control and monitoring unit determines whether or not the highly qualified service should be provided(S370). If a highly qualified service mode is selected, a synthesizer combines those two hierarchies for providing the selected service well to output a stream by which a highly qualified service is possible(S380).
Abstract translation: 提供了一种用于通过使用分层调制来接收高级DMB（数字多媒体广播）条件访问的装置和方法，用于向用户收取为用户提供高效的付费DMB服务时被发送到增强层级的各种服务。 控制监视单元在通过接收RF（射频）单元输入的RF信号中选择期望的信道（S310）。 控制监视单元将所选择的信道信号输出到OFDM解调器，并且基于在OFDM符号中确认的符号值，通过从基本层级服务中区分增强层级服务来解调并输出信道信号（S320）。 基本层次和增强层次的解复用器对每个层次的输入信号进行解复用并解析FIC数据和MSC数据（S330）。 增强层次数据分析器，基本层级数据分析器和视频服务流分析器确定是否需要解扰过程（S340，S350），并且控制和监视单元确定是否应提供高质量的服务（ S370）。 如果选择了高度合格的服务模式，则合成器组合了这两个层次以提供所选择的服务，以便输出可以进行高质量服务的流（S380）。
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公开(公告)号：KR100882507B1
公开(公告)日：2009-02-06
申请号：KR1020070116006
申请日：2007-11-14
Applicant: 한국전자통신연구원
IPC: H04N21/418 , H04N7/10
CPC classification number: H04N21/6118 , H04N7/1675 , H04N21/4181 , H04N21/6334
Abstract: A digital cable broadcasting receiver including a security module and a method for authenticating the same are provided to only a subscriber who joins a normal broadcasting service to watch a broadcast program, consequently preventing the illegal watching of a broadcast program. A digital cable broadcasting receiver module(100) extracts transport stream data from a broadcasting signal received from a head-end system through the authentication process with a digital broadcast head end system(300). A separable conditional access module(200) which is inserted into the digital cable broadcast receiver module transmits descrambled transport stream data to a digital cable broadcast reliever module by descrambling the transport stream data received from the head end system. A separable and conditional receiving module which is a cable card of POD(Point Of Deployment) method realizes the bidirectional communication with the digital cable broadcast transceiver module through the conditional receiving module interface(180) of the digital cable broadcast receiver module.
Abstract translation: 包括安全模块及其认证方法的数字有线广播接收机只提供给正常广播业务的用户观看广播节目，从而防止非法观看广播节目。 数字有线广播接收机模块（100）通过与数字广播头端系统（300）的认证处理从从头端系统接收的广播信号中提取传输流数据。 插入数字有线广播接收机模块的可分离条件访问模块（200）通过对从头端系统接收的传输流数据进行解扰，将解扰的传输流数据发送到数字有线广播缓解器模块。 作为POD（部署点）的有线卡的可分离和有条件接收模块通过数字有线广播接收机模块的条件接收模块接口（180）实现与数字有线广播收发器模块的双向通信。
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公开(公告)号：KR1020090008852A
公开(公告)日：2009-01-22
申请号：KR1020070072151
申请日：2007-07-19
Applicant: 한국전자통신연구원
IPC: H04L27/26
CPC classification number: H04L27/2604 , H03M13/1102 , H03M13/23 , H03M13/2957 , H03M13/356 , H04L27/261
Abstract: An apparatus and a method for hierarchical modulation are provided to improve reception performance without affecting a basic layer by inserting a pilot into an additional layer. A basic hierarchical channel encoder(110) generates a basic layer symbol string by encoding the basic layer signal string. A basic hierarchical modulation unit of a hierarchical modulation unit(150) generates the basic hierarchical modulation symbol string by modulating the base hierarchical symbol string. An additional hierarchical channel encoder(120) generates the additional hierarchical symbol string by encoding the additional hierarchical signal string. A pilot insertion unit(130) generates a pilot insertion symbol string by inserting the pilot to the addition hierarchical symbol string. The additional hierarchical modulation unit of the hierarchical modulation unit generates the additional hierarchical modulation symbol string by modulating the pilot insertion symbol string. The symbol mapping unit generates the hierarchical modulation signal by mapping the basic hierarchical modulation symbol string and the additional hierarchical symbol string to a signal space. A normalization unit normalizes the hierarchical modulation signal and generates the normalized hierarchical modulation signal.
Abstract translation: 提供了用于分级调制的装置和方法，以通过将导频插入附加层来改善接收性能而不影响基本层。 基本层级信道编码器（110）通过对基本层信号串进行编码来生成基本层符号串。 分级调制单元（150）的基本分级调制单元通过调制基本分层符号串来生成基本分级调制符号串。 附加分层信道编码器（120）通过对附加分层信号串进行编码来生成附加分层符号串。 导频插入单元（130）通过将导频插入加法分级符号串来生成导频插入符号串。 分级调制单元的附加分层调制单元通过调制导频插入符号串来产生附加分层调制符号串。 符号映射单元通过将基本分层调制符号串和附加分层符号串映射到信号空间来生成分层调制信号。 归一化单元对分级调制信号进行归一化，并生成归一化分级调制信号。
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公开(公告)号：KR1020080112485A
公开(公告)日：2008-12-26
申请号：KR1020070060947
申请日：2007-06-21
Applicant: 한국전자통신연구원 , 성균관대학교산학협력단
CPC classification number: H04L27/2626 , H04L25/0204 , H04L27/2666 , H04L27/2695
Abstract: A method for OFDM(Orthogonal Frequency Division Multiplexing) communications capable of improving receiving performance of OFDM system using pilot signal and apparatus thereof are provided to steadily receive various adding data service during high speed moving. A method for OFDM(Orthogonal Frequency Division Multiplexing) communications capable of improving receiving performance of OFDM system using pilot signal comprises the following steps: a step for receiving a media signal from outside(501); a step for encoding/modulating an inputted digital signal(503, 505); and a step for inserting a pilot signal in a protective section of a modulated digital signal(513). The digital modulation step includes a step of a reverse fourier transforming(509) a signal which is orthogonally modulated.
Abstract translation: 提供了一种使用导频信号提高OFDM系统的接收性能的OFDM（正交频分复用）通信方法及其装置，用于在高速移动期间稳定地接收各种附加数据业务。 一种能够使用导频信号改善OFDM系统的接收性能的OFDM（正交频分复用）通信方法包括以下步骤：从外部接收媒体信号的步骤（501）; 用于对输入的数字信号进行编码/调制的步骤（503,505）; 以及用于将导频信号插入调制数字信号（513）的保护部分中的步骤。 数字调制步骤包括逆向傅立叶变换（509）正交调制信号的步骤。
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