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公开(公告)号：KR100947604B1
公开(公告)日：2010-03-15
申请号：KR1020070132827
申请日：2007-12-17
Applicant: 한국전자통신연구원
IPC: H04B1/06
CPC classification number: H04L27/0014 , H04L2027/0026 , H04L2027/0046 , H04L2027/0065 , H04L2027/0069
Abstract: 본 발명의 이동통신 시스템에서 2차 루프 필터를 사용하는 주파수 오차 추정기 및 그 동작방법은 기준 코드를 사용하는 이동통신 시스템에서 송신기와 수신기 사이에 발생하는 주파수 오차를 산출하여 시간 변동에 대한 추종성을 손상시키지 않고 높은 추정 정밀도를 제공한다. 본 발명은 수신 신호와 기준 코드를 통하여 상관관계 값을 산출하는 상관기, 상기 상관관계 값을 이용하여 cross-product 오차를 산출하고, 상기 상관기로부터의 이전 샘플에 대한 상관관계 값을 이용하여 주파수 오차를 검출하여 출력하는 주파수 오차 검출기 및 상기 주파수 오차를 필터링하여 신호대잡음비(S/N)를 개선하는 루프 필터를 포함하는 주파수 오차 추정기를 제공한다.
주파수 오차 검출기, 주파수 오차 추정기, 2차 디지털 루프 필터-
公开(公告)号：KR1020090065332A
公开(公告)日：2009-06-22
申请号：KR1020070132827
申请日：2007-12-17
Applicant: 한국전자통신연구원
IPC: H04B1/06
CPC classification number: H04L27/0014 , H04L2027/0026 , H04L2027/0046 , H04L2027/0065 , H04L2027/0069
Abstract: A frequency error estimator using the second order loop filter in a mobile communication system and an operating method thereof are provided to supply high estimation accuracy without damaging tracing about time variation of a frequency. A correlator(10) produces a correlation value through a received signal and a reference code. An FED(Ferquency Error Detector)(20) produces a cross-product error through the correlation value. The FED detects a frequency error through the correlation value about a previous sample from the correlator. The frequency error is filtered so that a loop filter improves an S/N(Signal to Noise) ratio.
Abstract translation: 提供了一种在移动通信系统中使用二阶环路滤波器的频率误差估计器及其操作方法，以提供高估计精度，而不损害关于频率的时间变化的跟踪。 相关器（10）通过接收信号和参考码产生相关值。 FED（频率误差检测器）（20）通过相关值产生交叉乘积误差。 FED通过关联来自相关器的先前样本的相关值来检测频率误差。 频率误差被滤波，使得环路滤波器改善了S / N（信噪比）比。
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Patent Agency Ranking
公开(公告)号：KR1020090050204A
公开(公告)日：2009-05-20
申请号：KR1020070116509
申请日：2007-11-15
Applicant: 한국전자통신연구원 , 한양대학교 산학협력단
IPC: G05F3/24
CPC classification number: G05F3/30
Abstract: 본 발명은 저전압 고정밀도 밴드갭 기준전압 발생기에 관한 것으로, 본 발명에 따른 저전압 고정밀도 밴드갭 기준전압 발생기는, 바이폴라 트랜지스터에 저항을 각각 병렬로 연결하여 전압 강하 폭을 최소화하고, 출력단의 저항을 변화시켜 온도변수가 제로의 값을 갖도록 함으로써, 낮은 전원전압에서도 온도변화에 무관한 안정된 기준전압을 제공할 수 있는 것을 특징으로 한다. 또한, 본 발명에 따른 저전압 고정밀도 밴드갭 기준전압 발생기는, 피드백 증폭기의 입출력단에서 입력 전압 및 출력 전압의 스위칭을 통해 오프셋 노이즈로 인한 기준전압의 변화율을 최소화함으로써 정확한 기준전압을 제공할 수 있는 것을 특징으로 한다.
저전압, 기준전압, 트랜지스터, 저항, 전압 변조, 스위칭Abstract translation: 本发明是一种低电压高的精度，根据本发明，分别并联连接在双极晶体管，以尽量减少在宽度方向上的电压降的电阻，和输出电阻的低电压高精密带隙参考电压生成器通过还涉及一种带隙基准电压发生器 通过使温度可变为零值，即使在低电源电压下也可以提供与温度变化无关的稳定的参考电压。 此外，低电压高精密带隙参考电压根据本发明发生器能够提供一个精确的基准电压时，通过最小化由于所述基准电压的变化，以从输入电压中的反馈放大器的输出端子的切换，并且输出电压的偏移噪声的速率的 和被表征。
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公开(公告)号：KR1020040102093A
公开(公告)日：2004-12-03
申请号：KR1020047016429
申请日：2003-04-26
Applicant: 한국전자통신연구원
CPC classification number: G06F3/165 , H04L29/06027 , H04L65/604 , H04L67/306 , H04N21/2335 , H04N21/25808 , H04N21/25891 , H04N21/6377 , H04N21/658 , H04N21/6582
Abstract: PURPOSE: A device and a method for adapting audio signals to user's features are provided to adapt audio contents to a user environment by using information previously describing a use environment of a user terminal consuming the audio contents. CONSTITUTION: An audio data source tool(101) receives audio data generated from a multimedia source. An audio adaptation tool(103) receives the audio data from the audio data source tool. An audio use environment information managing tool(107) adapts the audio data to the user environment by using the information previously describing the use environment, and previously describes/manages the use environment information by collecting the information from a user, the user terminal, and an environment. An audio data output tool(105) outputs the audio data adapted by the audio adaptation tool.
Abstract translation: 目的：通过使用先前描述消费音频内容的用户终端的使用环境的信息，提供用于使音频信号适应用户特征的设备和方法以将音频内容适配到用户环境。 构成：音频数据源工具（101）接收从多媒体源产生的音频数据。 音频适配工具（103）从音频数据源工具接收音频数据。 音频使用环境信息管理工具（107）通过使用先前描述使用环境的信息来将音频数据适配到用户环境，并且通过收集来自用户，用户终端和/或用户的信息来先前描述/管理使用环境信息 一个环境。 音频数据输出工具（105）输出由音频适配工具适应的音频数据。
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公开(公告)号：KR100444734B1
公开(公告)日：2004-08-16
申请号：KR1020020083735
申请日：2002-12-24
Applicant: 한국전자통신연구원
IPC: H04B1/40
Abstract: PURPOSE: A multifunctional mobile terminal having a broadband voice encoder function and a DAB(Digital Audio Broadcasting) receiving function is provided to add a broadband voice encoder function, a DAB receiving function, and an MP3 player function to a mobile terminal. CONSTITUTION: A multifunctional mobile terminal comprises the first and second antennas(ANT1.ANT2), a mobile communication RF part(100), a DAB RF part(200), a terminal central processing part(300), a voice codec(400), an MPEG layer II/III decoder(500), a voice band codec(600), an audio DAC(Digital Analog Converter)(700), and an analog signal input/output part(800). The first and second antennas(ANT1.ANT2) transmit and receive mobile communication data and DAB data respectively. The mobile communication RF part(100) and the DAB RF part(200) execute RF signal processing for mobile communication data and DAB data respectively. The terminal central processing part(300) controls the overall operations of the multifunctional mobile terminal. The voice codec(400), if packet data are supplied from the terminal central processing part(300), regenerates a digital voice signal and transfers it to the voice band codec(600). In case that a digital voice signal is provided from the voice band codec(600), the voice codec(400) compresses the digital voice signal and supplies it to the terminal central processing part(300). The MPEG layer II/III decoder(500) regenerates a digital audio signal from the MP2 or MP3 packet data transmitted from the terminal central processing part(300) and outputs it to the audio DAC(700).
Abstract translation: 目的：提供具有宽带语音编码器功能和DAB（数字音频广播）接收功能的多功能移动终端，以向移动终端添加宽带语音编码器功能，DAB接收功能和MP3播放器功能。 一种多功能移动终端，包括第一和第二天线（ANT1.ANT2），移动通信RF部分（100），DAB RF部分（200），终端中央处理部分（300），语音编解码器（400） ，MPEG层II / III解码器（500），语音频带编解码器（600），音频DAC（数字模拟转换器）（700）以及模拟信号输入/输出部分（800）。 第一和第二天线（ANT1.ANT2）分别发送和接收移动通信数据和DAB数据。 移动通信RF部分（100）和DAB RF部分（200）分别对移动通信数据和DAB数据执行RF信号处理。 终端中央处理部分（300）控制多功能移动终端的整体操作。 如果从终端中央处理部分（300）提供分组数据，则语音编解码器（400）重新生成数字语音信号并将其传送到语音频带编解码器（600）。 在从语音频带编解码器（600）提供数字语音信号的情况下，语音编解码器（400）压缩数字语音信号并将其提供给终端中央处理部分（300）。 MPEG层II / III解码器（500）从终端中央处理部分（300）发送的MP2或MP3分组数据重新产生数字音频信号并将其输出到音频DAC（700）。
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公开(公告)号：KR1020040056984A
公开(公告)日：2004-07-01
申请号：KR1020020083735
申请日：2002-12-24
Applicant: 한국전자통신연구원
IPC: H04B1/40
CPC classification number: H04W88/06 , H04H40/36 , H04H2201/20 , H04W88/02
Abstract: PURPOSE: A multifunctional mobile terminal having a broadband voice encoder function and a DAB(Digital Audio Broadcasting) receiving function is provided to add a broadband voice encoder function, a DAB receiving function, and an MP3 player function to a mobile terminal. CONSTITUTION: A multifunctional mobile terminal comprises the first and second antennas(ANT1.ANT2), a mobile communication RF part(100), a DAB RF part(200), a terminal central processing part(300), a voice codec(400), an MPEG layer II/III decoder(500), a voice band codec(600), an audio DAC(Digital Analog Converter)(700), and an analog signal input/output part(800). The first and second antennas(ANT1.ANT2) transmit and receive mobile communication data and DAB data respectively. The mobile communication RF part(100) and the DAB RF part(200) execute RF signal processing for mobile communication data and DAB data respectively. The terminal central processing part(300) controls the overall operations of the multifunctional mobile terminal. The voice codec(400), if packet data are supplied from the terminal central processing part(300), regenerates a digital voice signal and transfers it to the voice band codec(600). In case that a digital voice signal is provided from the voice band codec(600), the voice codec(400) compresses the digital voice signal and supplies it to the terminal central processing part(300). The MPEG layer II/III decoder(500) regenerates a digital audio signal from the MP2 or MP3 packet data transmitted from the terminal central processing part(300) and outputs it to the audio DAC(700).
Abstract translation: 目的：提供一种具有宽带语音编码功能和DAB（数字音频广播）接收功能的多功能移动终端，用于向移动终端增加宽带语音编码功能，DAB接收功能和MP3播放功能。 构成：多功能移动终端包括第一和第二天线（ANT1.ANT2），移动通信RF部分（100），DAB RF部分（200），终端中央处理部分（300），语音编解码器（400） ，MPEG层II / III解码器（500），语音频带编解码器（600），音频DAC（数字模拟转换器）（700）和模拟信号输入/输出部分（800）。 第一和第二天线（ANT1.ANT2）分别发送和接收移动通信数据和DAB数据。 移动通信RF部分（100）和DAB RF部分（200）分别对移动通信数据和DAB数据执行RF信号处理。 终端中央处理部（300）控制多功能移动终端的整体动作。 如果从终端中央处理部分（300）提供分组数据，则语音编解码器（400）再生数字语音信号并将其传送到语音频带编解码器（600）。 在从语音编解码器（600）提供数字语音信号的情况下，语音编解码器（400）压缩数字语音信号并将其提供给终端中央处理部分（300）。 MPEG层II / III解码器（500）从终端中央处理部分（300）发送的MP2或MP3分组数据再生数字音频信号，并将其输出到音频DAC（700）。
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公开(公告)号：KR1020010064135A
公开(公告)日：2001-07-09
申请号：KR1019990062269
申请日：1999-12-24
Applicant: 한국전자통신연구원
IPC: H03M7/50
CPC classification number: G10L19/06
Abstract: PURPOSE: A fast searching method of a line spectrum pair quantizer according to predictive split vector quantization and predictive split matrix quantization is provided which reduces the size of a code book to be searched using sequence characteristic of line spectrum frequency coefficient in a vector code book searching procedure requiring lots of calculations, to decrease the amount of calculations without attenuating spectrum distortion performance. CONSTITUTION: A criterion is obtained using a target vector changed to have sequence characteristic and an object code vector. A DC component is added to the object code vector and a new code book for five sub-matrices is made. A specific row used for deciding a searching range is selected from a code book reconstructed to have sequence characteristic and code vectors are descending-aligned. The searching range is determined using the sequence characteristic of the target vector having the sequence characteristic and aligned code vectors. The criterion is calculated only within the determined searching range to find an optimal object code vector.
Abstract translation: 目的：提供一种基于预测分裂矢量量化和预测分割矩阵量化的线谱对量化器的快速搜索方法，其使用矢量码本搜索中的线谱频率系数的序列特征来减少要搜索的码本的大小 需要大量计算的程序，减少计算量而不衰减频谱失真性能。 构成：使用改变为具有序列特征的目标向量和目标代码向量来获得标准。 DC分量被添加到目标代码向量中，并且制作了一个用于五个子矩阵的新代码簿。 用于确定搜索范围的特定行从重构为具有序列特征的代码簿中选择，并且代码向量是降序对齐的。 使用具有序列特征和对齐的码矢量的目标矢量的序列特征来确定搜索范围。 仅在所确定的搜索范围内计算标准以找到最佳目标码矢量。
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