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    • 2. 发明授权
    • 부가데이터 송수신 장치
    • 使用数字广播系统传输附加信息的设备
    • KR101276928B1
    • 2013-06-19
    • KR1020120025445
    • 2012-03-13
    • 한국방송공사한국전자통신연구원(주)넥스윌
    • 이재권서영우경일수정신일박성익김흥묵허남호서원기
    • H04N21/8358
    • H04N21/8358H04H2201/50
    • PURPOSE: An additional data transmitting/receiving apparatus is provided to compensate distortion in an RF (Radio Frequency) part in case additional information is inserted into a digital broadcast signal. CONSTITUTION: An insertion level control unit (133) determines a level for inserting modulated additional information into a digital TV broadcast signal. An IF (Intermediate Frequency) and RF frequency up-converting unit (140) up-converts the frequency of the additional information into a high frequency band. An IF and RF frequency down-converting unit (141) down-converts the frequency of the additional information into which the digital TV broadcast signal is inserted. A demodulator (160) demodulates the digital TV broadcast signal into which frequency is down-converted. A digital TV broadcast signal removing unit (172) removes a re-modulated digital TV broadcast signal from the digital TV broadcast signal into which the frequency is down-converted. [Reference numerals] (110) IF/RF TV broadcasting signal transmitting unit; (120) Additional information encoding unit; (130) Pre-delay time compensating unit; (131) Digital filter; (132,171) Modulator; (133) Insertion level control unit; (140) IF/RF frequency up-converting unit; (141) IF/RF frequency down-converting unit; (151) RF part; (160,173) Demodulator; (161) Frequency estimating unit; (170) Symbol determining unit; (172) Digital TV broadcast signal removing unit; (180) Time delay estimating unit; (181) Filter calculation unit; (AA) Transmission antenna
    • 目的:提供附加的数据发送/接收装置,用于补偿在数字广播信号中插入附加信息的RF(射频)部分中的失真。 构成:插入电平控制单元(133)确定用于将调制的附加信息插入到数字TV广播信号中的电平。 IF(中频)和RF上变频单元(140)将附加信息的频率上变频为高频带。 IF和RF降频转换单元(141)对插入数字TV广播信号的附加信息的频率进行下变频。 解调器(160)对频率下变频的数字电视广播信号进行解调。 数字电视广播信号去除单元(172)从频率下变频的数字TV广播信号中去除再调制的数字TV广播信号。 (110)IF / RF TV广播信号发送单元; (120)附加信息编码单元; (130)预延迟时间补偿单元; (131)数字滤波器; (132,171)调制器; (133)插入电平控制单元; (140)IF / RF上变频单元; (141)IF / RF降频转换单元; (151)射频部分; (160,173)解调器; (161)频率估计单元; (170)符号确定单元; (172)数字电视广播信号去除单元; (180)时间延迟估计单元; (181)过滤器计算单元; (AA)发射天线
    • 4. 发明公开
    • 디지털 방송 시스템에서 부가데이터 전송 및 수신을 위한 장치 및 방법
    • 数字广播系统中附加数据传输和接收的方法与装置
    • KR1020130061257A
    • 2013-06-11
    • KR1020110127471
    • 2011-12-01
    • 한국전자통신연구원한국방송공사(주)넥스윌
    • 박성익임형수음호민서재현김흥묵허남호서영우이재권목하균서원기김주병
    • H04N7/015H04N7/08
    • H04B1/707H04H20/30H04H60/07H04N21/2383H04N21/4382H04N21/8126
    • PURPOSE: A device for transmitting and receiving additional data in a digital broadcast system and a method thereof are provided to transmit and receive the additional data which guarantees excellent receiving performance in a low SNR(Signal-to-Noise Ratio) and multi-path environment. CONSTITUTION: An IF(Intermediate Frequency) broadcast signal generation unit(110) generates a broadcast signal of an IF band through FEC(Forward Error Correction) and modulation of input broadcast data. An IF additional signal generation unit(120) generates additional input data as an additional signal of the IF band by using DSSS(Direct Sequence Spread Spectrum). An RF(Radio Frequency) upward conversion unit(150) converts a combination signal of the additional signal and the broadcast signal, which is generated in a signal combination unit(140), into an RF band. A transmission unit(160) transmits the combination signal of the generated RF band. [Reference numerals] (110) IF broadcast signal generation unit; (120) IF additional signal generation unit; (130) Average power control unit; (150) RF upward conversion unit; (160) Transmission unit; (AA) Broadcast data; (BB) Additional data
    • 目的:提供一种用于在数字广播系统中发送和接收附加数据的装置及其方法,用于发送和接收保证在低SNR(信噪比)和多径环境中的良好接收性能的附加数据 。 构成:IF(中频)广播信号生成单元(110)通过FEC(前向纠错)生成IF频带的广播信号,并输入广播数据的调制。 IF附加信号生成单元(120)通过使用DSSS(直接序列扩频)生成作为IF频带的附加信号的附加输入数据。 RF(射频)向上转换单元(150)将在信号组合单元(140)中产生的附加信号和广播信号的组合信号转换成RF频带。 发送单元(160)发送所生成的RF频带的组合信号。 (附图标记)(110)IF广播信号生成单元; (120)IF附加信号发生单元; (130)平均功率控制单元; (150)RF向上转换单元; (160)传输单元; (AA)广播资料; (BB)附加数据