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公开(公告)号：KR1020040058420A
公开(公告)日：2004-07-05
申请号：KR1020020084370
申请日：2002-12-26
Applicant: 한국전자통신연구원
IPC: H04L27/22
CPC classification number: H04L27/22 , H04L27/364 , H04L27/3863
Abstract: PURPOSE: A demodulator for correcting gain and phase imbalances between I/Q channels and a demodulating method thereof are provided to prevent deterioration in demodulation function by detecting and correcting the imbalance between the I/Q channels. CONSTITUTION: An A/D converter(102) is used for converting a received signal to a digital signal. A recovery unit(117) is used for outputting a carrier recovery signal. A decision unit receives the carrier recovery signal and outputs a symbol decision signal. A carrier frequency offset corrector is used for correcting a carrier frequency offset. A gain imbalance detector(109) is used for detecting a gain imbalance between I/Q channels. A gain imbalance corrector(103) is used for correcting the gain imbalance between the I/Q channels. A phase imbalance detector(108) is used for detecting a phase imbalance between the I/Q channels. A phase imbalance corrector(104) is used for correcting the phase imbalance between the I/Q channels.
Abstract translation: 目的：提供用于校正I / Q信道之间的增益和相位不平衡的解调器及其解调方法，以通过检测和校正I / Q信道之间的不平衡来防止解调功能的劣化。 构成：A / D转换器（102）用于将接收的信号转换为数字信号。 恢复单元（117）用于输出载波恢复信号。 决定单元接收载波恢复信号并输出符号判定信号。 载波频率偏移校正器用于校正载波频率偏移。 增益不平衡检测器（109）用于检测I / Q通道之间的增益不平衡。 增益不平衡校正器（103）用于校正I / Q通道之间的增益不平衡。 相位不平衡检测器（108）用于检测I / Q通道之间的相位不平衡。 相位不平衡校正器（104）用于校正I / Q通道之间的相位不平衡。
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公开(公告)号：KR1020020051301A
公开(公告)日：2002-06-28
申请号：KR1020000080908
申请日：2000-12-22
Applicant: 한국전자통신연구원
IPC: H04L27/22
CPC classification number: H04L25/061 , H04L27/2273
Abstract: PURPOSE: A digital quadrature demodulation device is provided where its DC offset is effectively controlled without increasing a complexity while realizing a hardware. CONSTITUTION: An A/D(Analog/Digital) converter(10) receives a receiving signal, and a matching filter(11) receives an output of the A/D converter. A digital interpolation filter(12) receives an output of the matching filter and an output of a symbol timing recoverer(14). A carrier phase detector(13) receives an output of the digital interpolation filter and an output of a carrier recoverer(15). A signal determination part(16) receives an output of the carrier phase detector, and the symbol timing recoverer receives the output of the carrier phase detector and an output of the signal determination part. The carrier recoverer receives the output of the carrier phase detector and the output of the signal determination part. And a DC offset control part(20) receives a recovery signal and a determination signal(symbol). The DC offset control part comprises a DC offset detector(21) receiving the recovery signal and the determination signal, and a loop filter(22) receiving an output of the DC offset detector, and a D/A converter(23) receiving an output of the loop filter.
Abstract translation: 目的：提供一种数字正交解调装置，其DC控制被有效地控制，而不会增加硬件的复杂性。 构成：A / D（模拟/数字）转换器（10）接收接收信号，匹配滤波器（11）接收A / D转换器的输出。 数字内插滤波器（12）接收匹配滤波器的输出和符号定时恢复器的输出（14）。 载波相位检测器（13）接收数字内插滤波器的输出和载波恢复器的输出（15）。 信号确定部分（16）接收载波相位检测器的输出，符号定时恢复器接收载波相位检测器的输出和信号确定部分的输出。 载波恢复器接收载波相位检测器的输出和信号确定部分的输出。 并且DC偏移控制部分（20）接收恢复信号和确定信号（符号）。 DC偏移控制部分包括接收恢复信号和确定信号的DC偏移检测器（21）和接收DC偏移检测器的输出的环路滤波器（22）和接收输出的D / A转换器（23） 的环路滤波器。
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公开(公告)号：KR1020010076791A
公开(公告)日：2001-08-16
申请号：KR1020000004146
申请日：2000-01-28
Applicant: 한국전자통신연구원
IPC: H04L27/00
CPC classification number: H04L27/0014 , H04L2027/0026 , H04L2027/0065 , H04L2027/0067
Abstract: PURPOSE: A parallel processing device of a decision directed carrier restoration apparatus is provided to increase calculation processing speed by parallel processing method other than sequential processing method. CONSTITUTION: The parallel processing device of a decision directed carrier restoration apparatus has the parallel frequency offset compensating part(101) and the parallel phase offset compensating part(102). The parallel frequency offset compensating part(101) parallel-inputs the carrier signal and compensates for the frequency offset by frequency tracking loop. The parallel phase offset compensating part(102) compensates for the frequency-compensated signal from the parallel frequency offset compensating part(101) by phase tracking loop(PTL).
Abstract translation: 目的：提供一种决策导向载波恢复装置的并行处理装置，通过并行处理方法以外的顺序处理方法来提高计算处理速度。 构成：决策导向载波恢复装置的并行处理装置具有并行频率补偿部分（101）和并行相位偏移补偿部分（102）。 并行频偏补偿部（101）并行输入载波信号，并通过频率跟踪回路补偿频偏。 并行相位偏移补偿部件（102）通过相位跟踪环路（PTL）补偿来自并行频率补偿部分（101）的频率补偿信号。
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公开(公告)号：KR102147145B1
公开(公告)日：2020-08-24
申请号：KR1020140111772
申请日：2014-08-26
Applicant: 한국전자통신연구원
IPC: H04N21/238 , H04N21/234 , H04N21/236 , H04N21/2662
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Patent Agency Ranking
公开(公告)号：KR101710864B1
公开(公告)日：2017-02-28
申请号：KR1020100130609
申请日：2010-12-20
Applicant: 한국전자통신연구원
IPC: H04N21/236 , H04N21/2365 , H04H60/73 , H04H60/06
Abstract: 본발명은단일송신방송서비스를위한장치를개시한다. 상기단일송신방송서비스를위한장치는, 입력의서브채널들을분석하여서브채널분석정보를출력하고, 각서브채널의스트림을추출하여출력하는입력처리부와, 앙상블, 서비스, 서비스컴포넌트와서브채널을구성하며, 상기입력처리부로부터의서브채널분석정보를이용하여출력앙상블구성에선택된입력의서브채널스트림을출력앙상블의서브채널로구성하고, 상기출력앙상블구성에따라 MCI(multiplex configuration information) 및 SI(service information) 정보, 서브채널구성정보를생성하는다중화관리부와, 상기입력처리부로부터각 서브채널의스트림을수신하고, 상기다중화관리부로부터수신된서브채널구성정보와다중화설정정보(MCI)에따라출력앙상블구성에필요한서브채널스트림을출력하는서브채널관리부와, 상기서브채널관리부로부터수신한서브채널스트림을정해진설정에따라공통인터리브프레임들(Common Interleaved Frame: CIF)로구성하여각 전송프레임에필요한주 서비스채널(Main Service Channel: MSC)을생성하는 MSC 생성부와, 상기다중화관리부(203)로부터수신된 MCI 및 SI 정보에기초하여 FIC(fast information channel)를생성하여출력하는 FIC 생성부와, 상기 FIC 생성부에서생성된 FIC와상기 MSC 생성부에서생성된 MSC로전송프레임을구성하여출력하는전송프레임구성부와, 상기전송프레임구성부로부터전송프레임을수신하고, 전송프레임을위한 DMB 방송신호를생성하여송신하는 DMB 변조부를포함한다..
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公开(公告)号：KR101694516B1
公开(公告)日：2017-01-10
申请号：KR1020120042856
申请日：2012-04-24
Applicant: 한국전자통신연구원
IPC: H04H20/24 , H04H60/07 , H04L12/18 , H04N21/434 , H04N21/438 , H04N21/643
CPC classification number: H04H20/24
Abstract: 지상파 DMB(terrestrial digital multimedia broadcasting) 비디오서비스제공장치는비디오인코더로부터부호화된적어도하나의비디오스트림을포함하는전송스트림(Transport Stream, TS) 패킷을앙상블전송인터페이스(Ensemble Transport Interface, ETI) 프레임을통해수신하여재구성하고, 재구성한 ETI 프레임을 ETI 신호로변환하여방송망을통해송출한다. 또한지상파 DMB 비디오서비스제공장치는재구성한 ETI 프레임에서프로그램클럭기준(Program Clock Reference, PCR) 값을가진 TS 패킷을패킷버퍼큐에저장하고, 통신망을통해접속한사용자의스트림요청에해당하는 TS 패킷을상기통신망을통해송출한다.
Abstract translation: 该方法包括通过接口屏幕接收来自视频编码器的编码视频流的流的包。 重新配置传输接口，通过广播网络传输信号。 流程包存储在数据库（412）中，其中流程包具有用于程序时钟的参考值。 在队列中提供传输接口的帧。 在对应于来自执行通过通信网络的访问的用户的请求的队列中执行研究。 包通过通信网络传输。 还提供用于提供视频服务的设备的独立权利要求。
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公开(公告)号：KR1020160074310A
公开(公告)日：2016-06-28
申请号：KR1020140183499
申请日：2014-12-18
IPC: H04N21/238 , H04N21/63 , H04N21/61 , H04N21/2381
CPC classification number: H04N21/238 , H04N21/23805 , H04N21/2381 , H04N21/61 , H04N21/631
Abstract: 하이브리드망에서의스트리밍방법및 그장치가제공된다. 방송망과통신망이결합된하이브리드망에서, 클라이언트장치는방송망을통하여비디오스트림을수신하는상태에서통신망으로의망전환이결정되면연동비디오스트림동기화를위한타임스탬프값을통신망을통하여스트리밍서버로전송하면서메타데이터파일을요청하고, 요청에따른타임스탬프메타데이터파일을수신하고분석하여시작세그먼트위치를찾는다. 클라이언트장치는시작세그먼트위치를토대로통신망을통하여스트리밍서버로부터관련세그먼트파일들을수신하여재생하며, 이후, 시작세그먼트위치에대응하는시간윈도우구간의메타데이터만을주기적으로요청하여제공받아비디오서비스를제공한다.
Abstract translation: 提供了一种混合网络中的流式传输方法及其装置。 在广播网络与通信网络组合的混合网络中，当在客户端设备经由广播网络接收到视频流的情况下确定了切换到通信网络的网络时，客户机设备发送相关联的视频流同步的时间戳值 通过通信网络到流服务器并且需要元数据文件。 然后，客户端设备接收并分析所需的时间戳元数据文件，并找到起始段位置。 客户端设备基于起始段的位置经由通信网络从流服务器接收并播放相关段文件，然后仅定期地要求与起始段位置相对应的时间窗口部分的元数据，并接收相同的段文件 ，从而提供视频服务。
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公开(公告)号：KR1020150021377A
公开(公告)日：2015-03-02
申请号：KR1020130098656
申请日：2013-08-20
Applicant: 한국전자통신연구원
IPC: H04N21/63 , H04N21/2343
CPC classification number: H04N21/64322 , H04H60/11 , H04H2201/11 , H04H2201/37 , H04L12/1836 , H04L12/189 , H04N21/4305 , H04N21/4307 , H04N21/4345 , H04N21/4347 , H04N21/4383 , H04N21/4622
Abstract: An apparatus for providing a terrestrial digital multimedia broadcasting (DMB) video service stores transport stream (TS) packets of a sub-channel of a video service to be transmitted through a communications network in association with a broadcasting network, in a stream DB, and when a request for a video stream in a bookmarked position is received through the communications network from a user, the apparatus searches the stream DB for a TS packet in the bookmarked position and transmits the searched TS packet through the communications network in an Internet protocol (IP) streamlining manner.
Abstract translation: 一种用于提供地面数字多媒体广播（DMB）视频业务的装置，存储在流DB中与广播网络相关联的通过通信网络发送的视频业务的子信道的传输流（TS）分组，以及 当通过通信网络从用户接收到对书签位置中的视频流的请求时，该装置在流DB中搜索书签位置中的TS分组，并通过因特网协议通过通信网络发送所搜索的TS分组（ IP）精简方式。
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120.发明公开
公开(公告)号：KR1020150001913A
公开(公告)日：2015-01-07
申请号：KR1020130074990
申请日：2013-06-28
Applicant: 한국전자통신연구원
IPC: H04N21/462 , H04N21/2662 , H04N21/63
CPC classification number: H04L65/4015 , H04L65/80
Abstract: 이종망 연계된 방송 스트림 전송 시스템에서 전송 스트림간 비트율을 보정하는 방법 및 장치가 제공된다. 본 발명은 방송망을 통해 고정비트율로 전송되는 제1 스트림을 수신함, 통신망을 통해 상황에 따라 가변비트율로 전송되는 제2 스트림을 수신함 및 상기 제1 스트림을 기초로 상기 제2 스트림의 비트율을 조절함을 포함한다.
Abstract translation: 提供了一种用于校正与异构网络相关联的广播流传输系统中的传输流之间的比特率的方法和装置。 本发明的方法包括：接收通过广播网络以固定比特率传输的第一流; 接收通过通信网络根据情况以可变比特率发送的第二流; 以及基于所述第一流来调整所述第二流的比特率。
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