公开(公告)号：KR1020000034467A

公开(公告)日：2000-06-26

申请号：KR1019980051803

申请日：1998-11-30

Applicant: 대우전자주식회사

Inventor： 박영록

IPC: H04N7/015

CPC classification number: H04N5/455 ,  H04L1/0047 ,  H04L2201/06 ,  H04N5/4401

Abstract: PURPOSE: An encoder using vestigial sideband method for digital television receiver is provided to determine an input bit as an eraser according to the status of channel of the television receiver to improve decoding capability. CONSTITUTION: An encoder using vestigial sideband method for digital television receiver includes an equalizer(204'), a channel status detector(300), and a viterbi decoder(206'). The digital television receiver receives a broadcasting signal of predetermined channel, decodes, and corrects an error. The digital television receiver decodes a video data and an audio data by way of a source decoding. The equalizer detects a synchronous error and compensates for the channel characteristics. The channel status detector compares the synchronous error from the equalizer and determines the channel status. The viterbi decoder processes the data from the equalizer by using an eraser or a viterbi algorithm.

Abstract translation: 目的：提供一种用于数字电视接收机的残留边带方法的编码器，以根据电视接收机的信道状态确定输入比特为橡皮擦，以提高解码能力。 构成：使用数字电视接收机的残留边带方法的编码器包括均衡器（204'），信道状态检测器（300）和维特比解码器（206'）。 数字电视接收机接收预定频道的广播信号，解码并纠正错误。 数字电视接收机通过源解码解码视频数据和音频数据。 均衡器检测同步误差并补偿通道特性。 信道状态检测器比较来自均衡器的同步误差并确定信道状态。 维特比解码器通过使用橡皮擦或维特比算法来处理来自均衡器的数据。

公开(公告)号：KR1020090101778A

公开(公告)日：2009-09-29

申请号：KR1020080027122

申请日：2008-03-24

Applicant: 삼성전자주식회사 ,  동국대학교 산학협력단

Inventor： 최종수 ,  신옌 ,  최병조 ,  황승훈

IPC: H04B7/005 ,  H04L27/01

CPC classification number: H04L27/01 ,  H04L25/03178 ,  H04L2201/06

Abstract: PURPOSE: An SOVA(Soft Output Viterbi Algorithm) channel equalization method and a receiver using the same are provided to facilitate VLSI implementation and DSP programming which are used in a system by reducing the complexity of SOVA. CONSTITUTION: An SOVA(Soft Output Viterbi Algorithm) channel equalization method is composed of computing the symbol soft output value by using the symbol in which "n" th symbol is not maximum likelihood sequence symbol of the maximum likelihood sequence symbol and the next likelihood sequence symbol, and computing the bit soft output value by using the symbol soft output value. The "n" is a natural number.

Abstract translation: 目的：提供SOVA（软输出维特比算法）信道均衡方法和使用该方法的接收机，以便于通过降低SOVA的复杂度来在系统中使用的VLSI实现和DSP编程。 构成：SOVA（软输出维特比算法）信道均衡方法是通过使用其中“n”个符号不是最大似然序列符号的最大似然序列符号和下一个似然序列的符号来计算符号软输出值 符号，并使用符号软输出值计算位软输出值。 “n”是自然数。

公开(公告)号：KR1020090059405A

公开(公告)日：2009-06-11

申请号：KR1020070126248

申请日：2007-12-06

Applicant: 연세대학교 산학협력단

Inventor： 송홍엽 ,  홍윤표

IPC: H04L27/00 ,  H04B7/00

CPC classification number: H04L1/0009 ,  H04B1/71632 ,  H04B1/7176 ,  H04L1/0059 ,  H04L1/0071 ,  H04L2201/06

Abstract: An apparatus and a method for transmitting an ultra-wideband signal are provided to improve a bit error rate and to remove a line spectrum by generating a transmitting signal with interleaving and a polar randomized sequence. A channel encoder(110) uses a coding method having a linearly independent output formula. The channel encoder codes a source data, and generates a first signal. An interleaver(120) generates a second signal by interleaving the first signal. A modulator(130) generates a third signal by modulating the second signal according to a pulse position modulation method. A randomizer(140) generates a transmitting signal by using a predetermined polar randomized sequence.

Abstract translation: 提供用于发送超宽带信号的装置和方法，以通过用交织和极性随机序列生成发送信号来提高误码率并消除线路频谱。 信道编码器（110）使用具有线性无关的输出公式的编码方法。 通道编码器对源数据进行编码，并产生第一信号。 交织器（120）通过交织第一信号来产生第二信号。 调制器（130）通过根据脉冲位置调制方法调制第二信号来产生第三信号。 随机化器（140）通过使用预定极性随机序列产生发送信号。

公开(公告)号：KR1020050034338A

公开(公告)日：2005-04-14

申请号：KR1020030070228

申请日：2003-10-09

Applicant: 엘지전자 주식회사

Inventor： 김우찬

IPC: H04N7/015

CPC classification number: H04L25/03254 ,  H04L25/03159 ,  H04L2025/03636 ,  H04L2201/06

Abstract: 본 발명은 MLSE 신호를 이용한 잡음 제거기를 포함한 디지털 방송 수신 시스템에 관한 것으로 본 발명에 따르면, 수신된 RF 신호를 캐리어/타이밍 복원 등을 통하여 기저 대역 신호로 복조하는 복조기와, 상기 수신된 신호가 송신기에서 수신기까지 도달하는 동안에 발생하는 각종 페이딩을 보상하는 주파수 영역 등화기와, 상기 등화 과정에서 증폭된 잡음을 제거하는 잡음 제거기와, 상기 잡음 제거기의 출력을 입력받아 신뢰성 높은 결정 신호인 MLSE를 생성하고, 상기 MLSE 신호를 상기 잡음 제거기로 궤환(feedback)시켜 주는 MLSE부를 포함하여 구성되어, 매우 큰 페이딩이 있는 채널을 통과한 신호에 대해서도 상기 MLSE 신호를 이용하여 정확한 기준 잡음 신호를 생성함으로써, 종래 잡음 제거기에 비해 성능이 개선된 잡음 제거기를 갖는 디지털 방송 수신 시 스템을 제작하는 효과가 있다.

公开(公告)号：KR1020010011494A

公开(公告)日：2001-02-15

申请号：KR1019990030889

申请日：1999-07-28

Applicant: 주식회사 엘지이아이

Inventor： 구영모

IPC: H04N7/015

CPC classification number: H04N19/507 ,  H04L1/0047 ,  H04L2201/06

Abstract: PURPOSE: A receiving device of a digital TV is provided to use a four-level slicer in a channel equalizing process when reliability of a predicted value is high, after predicting a register value of a trellis coder in a transmitting side, and to use an eight-level slicer when the reliability of the predicted value is low, so as to minimize decision errors of slicers to prevent a deterioration of a signal to noise ratio(SNR), which is caused by a noise amplification of a feedback filter in a channel equalizer, even in a channel having a severe ghost, to improve the capacity of the channel equalizer. CONSTITUTION: A feed forward filter(74-1) attenuates the influence of a near ghost. A feedback filter(74-7) attenuates the influence of a remote ghost. An adder(74-2) adds an output of the feed forward filter(74-1) to an output of the feedback filter(74-7). The first to the third slicer(74-3-74-5) decide the added output of the adder(74-2) with a nearest signal level. A multiplexer(MUX)(74-6) selects one of outputs of the first to the third slicer(74-3-74-5) according to the output of a slicer predictor(75), and feeds back the selected output to the feedback filter(74-7).

Abstract translation: 目的：提供数字电视的接收装置，在预测发送侧的网格编码器的寄存器值之后，在预测值的可靠性高的情况下，在信道均衡处理中使用四级限幅器，并使用 当预测值的可靠性低时，八级限幅器，以便最小化限幅器的决策误差，以防止由信道中的反馈滤波器的噪声放大引起的信噪比（SNR）的劣化 均衡器，甚至在具有严重重影的信道中，以提高信道均衡器的容量。 构成：前馈滤镜（74-1）可以减弱近乎重影的影响。 反馈滤波器（74-7）减弱了远程重影的影响。 加法器（74-2）将前馈滤波器（74-1）的输出与反馈滤波器（74-7）的输出相加。 第一个到第三个限幅器（74-3-74-5）决定加法器（74-2）的相加输出与最近的信号电平。 复用器（MUX）（74-6）根据限幅器预测器（75）的输出选择第一至第三限幅器（74-3-74-5）的输出之一，并将选择的输出反馈到 反馈滤波器（74-7）。

公开(公告)号：KR1020000018531A

公开(公告)日：2000-04-06

申请号：KR1019980036149

申请日：1998-09-02

Applicant: 엘지전자 주식회사

Inventor： 구영모

IPC: H04N7/015

CPC classification number: H04N19/44 ,  H04L1/006 ,  H04L2201/06

Abstract: PURPOSE: A transmitter apparatus of a digital television is provided to transmit data in a 4VSB transmission fashion not trellis-coded in a channel where an affect of a distant ghost is severe. CONSTITUTION: In the transmitter apparatus of a digital television which trellis-codes digital data to transmit the digital data in a 8 vestigial side band (VSB) modulation fashion, a four vestigial side band (VSB) coder (75) is provided. In a channel where an affect of a distant ghost is severe, the digital data is transferred in a four vestigial side band modulation fashion not trellis-coded. The four VSB coder (75) comprises a pre-coder for pre-coding one bit of two input symbol bits; and a mapper for receiving a bit not being pre-coded among the two input symbol bits and the pre-coded bit in the pre-coder to map the received bits with a four-level symbol.

Abstract translation: 目的：提供一种数字电视的发射机装置，以在远距离重影的影响严重的频道中以不格网编码的4VSB传输方式传输数据。 构成：在数字电视机的发送装置中，以8个残留边带（VSB）调制方式对数字数据进行格网发送，提供四个残留边带（VSB）编码器（75）。 在远距离幽灵的影响严重的通道中，数字数据以不格状编码的四种残留边带调制方式传送。 四个VSB编码器（75）包括用于对两个输入符号位的一位进行预编码的预编码器; 以及映射器，用于接收在两个输入符号位之间未被预编码的位和预编码器中的预编码位，以将所接收的位与四电平符号进行映射。