公开(公告)号：US07945609B2

公开(公告)日：2011-05-17

申请号：US11541213

申请日：2006-09-29

申请人： Eung-Don Lee ,  O-Hyung Kwon ,  Soo-In Lee

发明人： Eung-Don Lee ,  O-Hyung Kwon ,  Soo-In Lee

IPC分类号： G06F1/02

CPC分类号： G06F1/0353

摘要： A method for composing a lookup table and searching indexes thereof is provided. The method includes the steps of: a) composing a lookup table using a symmetry of a sine and a cosine function; b) changing and setting a gain of a DCO by reflecting a lookup table size in the DCO; c) transforming an absolute value of a DCO output to an integer value; d) determining a range of the integer value of the DCO output; e) searching indexes of a sine and an cosine function according to the range of the integer value of the DCO output; and f) correcting a sign of a lookup table value corresponding to the searched index of the sine function and a sign of a lookup table value corresponding to the searched index of the cosine function according to the range of integers of the DCO output.

摘要翻译： 提供了一种组合查找表和搜索索引的方法。 该方法包括以下步骤：a）使用正弦和余弦函数的对称来构成查找表; b）通过反映DCO中的查找表大小来更改和设置DCO的增益; c）将DCO输出的绝对值转换为整数值; d）确定DCO输出的整数值的范围; e）根据DCO输出的整数值的范围，搜索正弦和余弦函数的索引; 以及f）根据所述DCO输出的整数的范围，校正与搜索到的正弦函数的索引相对应的查找表值的符号和与所搜索的余弦函数的索引相对应的查找表值的符号。

公开(公告)号：US20100210205A1

公开(公告)日：2010-08-19

申请号：US12681966

申请日：2008-06-10

申请人： Sung-Ik Park ,  Yong-Tae Lee ,  Jong-Soo Lim ,  Soo-In Lee ,  Ji-Bong Lee ,  Wan-Jin Kim ,  Hyoung-Nam Kim ,  Kyung-Sik Son

发明人： Sung-Ik Park ,  Yong-Tae Lee ,  Jong-Soo Lim ,  Soo-In Lee ,  Ji-Bong Lee ,  Wan-Jin Kim ,  Hyoung-Nam Kim ,  Kyung-Sik Son

IPC分类号： H04B7/14

CPC分类号： H04B7/15585

摘要： Provided is an on-channel repeater capable of removing feedback signals based on pilot partitioning, which can efficiently remove a feedback signal by quickly coping with even a situation in which a feedback channel changes rapidly, by reducing a filter-coefficient update interval, i.e., increasing the number of times of filter-coefficient creation, through pilot partitioning, and a method thereof. The on-channel repeater includes: a receiver for receiving a signal; a subtractor for subtracting a replica of a feedback signal from the signal received in the receiver to remove the feedback signal; a replica creator for creating a filter coefficient using pilot partitioning, creating a replica of the feedback signal using the created filter coefficient, and feeding back the created replica to the subtractor; and a transmitter for transmitting an output signal of the subtractor.

摘要翻译： 提供一种能够基于导频分割去除反馈信号的同信道中继器，其可以通过快速处理反馈信道快速变化的情况，通过减少滤波器系数更新间隔来有效地去除反馈信号，即， 通过导频分割增加滤波器系数创建的次数及其方法。 同频中继器包括：用于接收信号的接收机; 减法器，用于从接收器中接收的信号中减去反馈信号的副本以去除反馈信号; 用于使用导频分区创建滤波器系数的副本创建器，使用所创建的滤波器系数创建反馈信号的副本，以及将所创建的副本反馈到减法器; 以及用于发送减法器的输出信号的发送器。

公开(公告)号：US07779327B2

公开(公告)日：2010-08-17

申请号：US10594467

申请日：2005-04-01

申请人： Jae-Young Lee ,  Kum-Ran Ji ,  Sung-Hoon Kim ,  Seung-Won Kim ,  Soo-In Lee ,  Chieteuk Ahn

发明人： Jae-Young Lee ,  Kum-Ran Ji ,  Sung-Hoon Kim ,  Seung-Won Kim ,  Soo-In Lee ,  Chieteuk Ahn

IPC分类号： H03M13/29

CPC分类号： H03M13/256 ,  H03M13/253 ,  H03M13/2732 ,  H03M13/2936 ,  H03M13/356 ,  H04L1/0057 ,  H04L1/006 ,  H04L1/0065 ,  H04L1/007 ,  H04L1/0071

摘要： Provided are a Vestigial Side Band (VSB) Digital Television (DTV) transmitter and receiver based on the Advanced Television System Committee (ATSC) A/53, and a method thereof. The present invention provides 8-VSB DTV transmitter and receiver that can improve reception performance of the receiver by transmitting and receiving robust data mixed with P-2VSB, E-4VSB, and/or E-8VSB. The DTV transmitter includes an input means for receiving a digital video data stream including normal data and robust data; an encoding means for coding the digital video data stream into data symbols; and a transmitting means for modulating and transmitting an output signal of the encoding means, wherein the encoding means performs trellis coding on the robust data by sequentially applying a plurality of trellis coding methods.

摘要翻译： 提供了基于高级电视系统委员会（ATSC）A / 53的残留边带（VSB）数字电视（DTV）发射机和接收机及其方法。 本发明提供了通过发送和接收与P-2VSB，E-4VSB和/或E-8VSB混合的鲁棒数据来提高接收机的接收性能的8-VSB DTV发射机和接收机。 DTV发射机包括用于接收包括正常数据和鲁棒数据的数字视频数据流的输入装置; 用于将数字视频数据流编码成数据符号的编码装置; 以及发送装置，用于调制和发送编码装置的输出信号，其中编码装置通过顺序地应用多个网格编码方法对鲁棒数据执行格状编码。

公开(公告)号：US20090129450A1

公开(公告)日：2009-05-21

申请号：US11579657

申请日：2005-05-12

申请人： Ho-Min Eum ,  Yong-Tae Lee ,  Seung-Won Kim ,  Heung-Mook Kim ,  Jae-Hyun Seo ,  Sung-Ik Park ,  Soo-In Lee

发明人： Ho-Min Eum ,  Yong-Tae Lee ,  Seung-Won Kim ,  Heung-Mook Kim ,  Jae-Hyun Seo ,  Sung-Ik Park ,  Soo-In Lee

IPC分类号： H04L25/52

CPC分类号： H04H20/02 ,  H03J7/04 ,  H04B7/15528 ,  H04H20/67 ,  H04H20/72 ,  H04W56/00

摘要： Provided is a frequency synchronizing apparatus and method that can synchronize frequencies between receiving signals and transmitting signals by extracting a carrier error and sampling timing error information in a synchronization process of the receiving signal from a main transmitter or another repeater and reflecting them in the transmitting signal in an on-channel repeater. The apparatus includes a carrier recovery means for compensating a carrier frequency error of a receiving signal; a timing recovery means for compensating a sampling timing error of the receiving signal; a carrier error reflecting means for reflecting the carrier frequency error extracted from the carrier recovery means to a transmitting signal; and a timing error reflecting means for reflecting the sampling timing error extracted from the timing recovery means to the transmitting signal. The present invention is used to form an on-channel repeating network in any transmission system including a digital television broadcasting system.

摘要翻译： 提供一种频率同步装置和方法，其可以通过在来自主发射机或另一个中继器的接收信号的同步处理中提取载波误差和采样定时误差信息来同步接收信号和发射信号之间的频率并将其反射到发射信号中 在一个通道中继器。 该装置包括用于补偿接收信号的载波频率误差的载波恢复装置; 定时恢复装置，用于补偿接收信号的采样定时误差; 用于将从载波恢复装置提取的载波频率误差反映到发射信号的载波误差反射装置; 以及定时误差反映装置，用于将从定时恢复装置提取的采样定时误差反映到发射信号。 本发明用于在包括数字电视广播系统的任何传输系统中形成一个同信道重复网络。

公开(公告)号：US07301994B2

公开(公告)日：2007-11-27

申请号：US10839315

申请日：2004-05-04

申请人： Sung-Ik Park ,  Yong-Tae Lee ,  Jae-Hyun Seo ,  Seung-Won Kim ,  Soo-In Lee

发明人： Sung-Ik Park ,  Yong-Tae Lee ,  Jae-Hyun Seo ,  Seung-Won Kim ,  Soo-In Lee

IPC分类号： H04B3/36

CPC分类号： H04H20/72 ,  H04H20/02 ,  H04N5/40

摘要： Provided is a modulation apparatus that can reduce time delay of on-channel repeaters in a terrestrial digital television broadcasting system. The time delay is caused by a filter during the modulation operation in the on-channel repeaters. The modulation apparatus of the present research includes: a baseband signal forming unit for forming a baseband signal by combining the output signals of an equalization unit with the pre-defined field/segment synchronization signals in the on-channel repeaters; a pilot inserting unit for inserting a pilot signal to the baseband signal; an up-sampling unit for up-sampling the baseband signal with the pilot signal; a VSB filtering unit for filtering the up-sampled baseband signal based on a Window technique and/or an Equi-Ripple filter to thereby form an in-phase (I) signal and a quadrature (Q) signal; an up-converting unit for up-converting the frequencies of the filtered I and Q signals to frequencies of an intermediate frequency (IF) band; an adding unit for adding the up-converted I and Q signals and converting a resultant signal into a digital VSB signal of the IF band; and a digital-to-analogue converting unit for converting the digital signal of the IF band to an analogue signal.

摘要翻译： 提供了一种可以减少地面数字电视广播系统中的通道中继器的时间延迟的调制装置。 在通道中继器的调制操作期间，时间延迟是由滤波器引起的。 本研究的调制装置包括：基带信号形成单元，用于通过将均衡单元的输出信号与在线通道中继器中的预定义的场/段同步信号组合来形成基带信号; 导频插入单元，用于将导频信号插入到基带信号中; 用于使用导频信号对基带信号进行上采样的上采样单元; VSB滤波单元，用于基于Window技术和/或Equi-Ripple滤波器对上采样基带信号进行滤波，从而形成同相（I）信号和正交（Q）信号; 上变频单元，用于将滤波的I和Q信号的频率上变频到中频（IF）频带的频率; 加法单元，用于将上变频的I和Q信号相加，并将结果信号转换成IF频带的数字VSB信号; 以及用于将IF频带的数字信号转换为模拟信号的数模转换单元。

公开(公告)号：US20070127468A1

公开(公告)日：2007-06-07

申请号：US11606152

申请日：2006-11-29

申请人： Dong-Joon Choi ,  Woong-Shik You ,  O-Hyung Kwon ,  Soo-In Lee

发明人： Dong-Joon Choi ,  Woong-Shik You ,  O-Hyung Kwon ,  Soo-In Lee

IPC分类号： H04L12/56

CPC分类号： H04L29/06 ,  H04L12/2801 ,  H04L12/2856 ,  H04L12/2861

摘要： Provided is an IP data transmission apparatus using a legacy transmission system and a broadband downstream transmission system in a HFC network. The IP data transmission apparatus includes: an headend unit for receiving data from an application server system that is a service providing apparatus, splitting the received data into general user data and management message, determining whether the general user is transmitted using a broadband or an existing service band, and transmitting the general user data through the HFC network; and a user cable terminal unit for receiving the split data transmitted from the headend unit through the HFC network, transmitting the received data to an IP based user device, and transferring the management message to the IP based user device through the legacy transmission system.

摘要翻译： 提供了一种在HFC网络中使用传统传输系统和宽带下行传输系统的IP数据传输设备。 IP数据发送装置包括：前端单元，用于从作为服务提供装置的应用服务器系统接收数据，将接收到的数据分割成一般的用户数据和管理消息，确定是否使用宽带或现有的 服务频段，并通过HFC网络传输一般用户数据; 以及用户电缆终端单元，用于通过HFC网络接收从头端单元发送的分割数据，将接收的数据发送到基于IP的用户设备，并通过传统传输系统将管理消息传送到基于IP的用户设备。

公开(公告)号：US20070121597A1

公开(公告)日：2007-05-31

申请号：US11520882

申请日：2006-09-14

申请人： Eung-Don Lee ,  O-Hyung Kwon ,  Soo-In Lee

发明人： Eung-Don Lee ,  O-Hyung Kwon ,  Soo-In Lee

IPC分类号： H04L12/66

CPC分类号： H04L43/0829 ,  H04L29/06027 ,  H04L43/087 ,  H04L43/106 ,  H04L47/10 ,  H04L65/604 ,  H04L65/605 ,  H04L65/608 ,  H04L65/80

摘要： Provided is an apparatus and method for processing a Voice over Internet Protocol (VoIP) packet with multiple frames. The apparatus includes: a transmission packet processing unit for receiving a frame from a speech codec, forming a Real-time Transport Protocol (RTP) payload in a form of multiple frames and transmitting the RTP payload to an RTP stack; and a reception packet processing unit for receiving an RTP packet from the RTP stack, storing the RTP packet in a jitter buffer, performing dejittering, separating frames from the RTP payload one by one and transmitting the frames to the speech codec.

摘要翻译： 提供了一种用于处理具有多个帧的因特网协议语音（VoIP）分组的装置和方法。 该装置包括：发送分组处理单元，用于从语音编解码器接收帧，形成多帧形式的实时传输协议（RTP）有效载荷，并将RTP有效载荷发送到RTP栈; 以及接收分组处理单元，用于从RTP堆栈接收RTP分组，将RTP分组存储在抖动缓冲器中，执行去抖动，逐帧分离帧与RTP有效载荷并将帧发送到语音编解码器。

公开(公告)号：US20070041434A1

公开(公告)日：2007-02-22

申请号：US10577532

申请日：2004-10-29

申请人： Sung-Ik Park ,  Yong-Tae Lee ,  Jae-Hyun Seo ,  Seung-Won Kim ,  Soo-In Lee

发明人： Sung-Ik Park ,  Yong-Tae Lee ,  Jae-Hyun Seo ,  Seung-Won Kim ,  Soo-In Lee

IPC分类号： H04B3/36

CPC分类号： H04H20/06 ,  H04B7/15564 ,  H04N5/211 ,  H04N5/38

摘要： Provided is an on-channel repeater and method thereof. The on-channel repeating apparatus includes: a receiving unit for receiving a Radio Frequency (RF) broadcast signal; a demodulating unit for converting the RF signal into a baseband signal; an equalizing unit for equalizing the baseband signal to generate an equalized baseband signal; a modulating unit for converting the equalized baseband signal into an RF signal; and a transmitting unit for transmitting the RF signal.

摘要翻译： 提供一种同频中继器及其方法。 所述在线中继装置包括：接收单元，用于接收射频（RF）广播信号; 解调单元，用于将RF信号转换成基带信号; 用于均衡基带信号以产生均衡的基带信号的均衡单元; 调制单元，用于将均衡的基带信号转换成RF信号; 以及发送单元，用于发送RF信号。

公开(公告)号：US20060133398A1

公开(公告)日：2006-06-22

申请号：US11259969

申请日：2005-10-26

申请人： Dong-Joon Choi ,  O-Hyung Kwon ,  Soo-In Lee

发明人： Dong-Joon Choi ,  O-Hyung Kwon ,  Soo-In Lee

IPC分类号： H04L12/56 ,  H04J3/26 ,  H04J3/06 ,  H04L12/28

CPC分类号： H04L12/2801 ,  H04J3/085 ,  H04J2203/0042 ,  H04J2203/006

摘要： Provided is an apparatus for transmitting/receiving communication and broadcasting data. The transmitting apparatus includes: a mapper for mapping inputted broadcasting data into a transport stream according to a predetermined standard; a broadcasting buffer for temporarily storing the mapped transport stream for multiplexing; a communication buffer for temporarily storing a communication data stream for multiplexing; a counter for measuring data rate information of a broadcasting stream inputted between two SYNC signals and outputting the measured data rate; an SYNC signal generator for generating an SYNC signal for synchronization between the transmitting apparatus and a receiving part and periodically transmitting the generated SYNC signal; and a multiplexer for multiplexing a communication stream, a broadcasting stream, and an SYNC signal.

公开(公告)号：US20050144634A1

公开(公告)日：2005-06-30

申请号：US10971167

申请日：2004-10-22

申请人： Han-Seung Koo ,  O-Hyung Kwon ,  Soo-In Lee

发明人： Han-Seung Koo ,  O-Hyung Kwon ,  Soo-In Lee

IPC分类号： H04K1/00 ,  H04L9/00 ,  H04N7/167

CPC分类号： H04N21/63775 ,  H04N7/1675 ,  H04N21/2347 ,  H04N21/2543 ,  H04N21/26613 ,  H04N21/2668 ,  H04N21/4405 ,  H04N21/4627 ,  H04N21/47211 ,  H04N21/6581 ,  H04N21/8355

摘要： Disclosed is a method for providing a pay-TV service based on a session key. The method includes the steps of: selecting a desired pay event using a program guide displayed on a system of the subscriber and achieving a subscriber private key; filling out a service application based on service information, signing the service application based on a digital signature scheme and encrypting the digital signed service application; transmitting the encrypted service application to a broadcasting station and waiting a response of the broadcasting station; receiving a session key and a subscription authority message from the broadcasting station, decrypting the session key and the subscription authority message and verifying the digital signature; decrypting a channel key, achieving a control word, descrambling event audio/video streams and watching the event; and if the event is terminated or the session key is not effective, stopping watching the event and deleting the session key.

摘要翻译： 公开了一种基于会话密钥提供付费电视服务的方法。 该方法包括以下步骤：使用在订户的系统上显示的节目指南来选择所需的付费事件并实现用户私钥; 基于服务信息填写服务应用程序，基于数字签名方案签署服务应用程序，加密数字签名服务应用程序; 将加密的服务应用发送到广播站并等待广播电台的响应; 从广播站接收会话密钥和订阅授权消息，解密会话密钥和订阅授权消息并验证数字签名; 解密通道密钥，实现控制字，解扰事件音频/视频流并观看事件; 如果事件终止或会话密钥无效，则停止观察事件并删除会话密钥。