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    • 3. 发明授权
    • System and method for digital multimedia broadcasting confinement service
    • 数字多媒体广播约束服务的系统和方法
    • US07873072B2
    • 2011-01-18
    • US11636932
    • 2006-12-11
    • Han-Sang KimKwan-Woong SongYoung-Hun JooYong-Deok KimYun-Je Oh
    • Han-Sang KimKwan-Woong SongYoung-Hun JooYong-Deok KimYun-Je Oh
    • H04J3/16
    • H04H60/23H04N7/52H04N21/23608H04N21/2362H04N21/23895H04N21/4344H04N21/4345H04N21/43853H04N21/835
    • Disclosed are a system and method for providing digital multimedia broadcasting confinement service. The system includes: a relay center side system, which is adopted to the relay center, according to the relay center side packet identification description (PID) key, for modifying the PID of transport stream and generating the distorted program specific information (PSI); and a terminal side system, which is adopted to the DMB terminal, according to the terminal side PID key, for recovering the distorted PSI of the transport stream received from the relay center and decoding it. The method includes the steps of: identifying whether the actual PID of the TS is consistent when the TS is demultiplexed by audio/video PID acquired through the program map table (PMT) analysis of the TS; generating a preset alarm signal; modifying the PID of the audio/video data in the PMT according to the terminal side PID; and demultiplexing the TS according to the modified PID value.
    • 公开了一种用于提供数字多媒体广播限制服务的系统和方法。 该系统包括:根据中继中心侧分组识别描述(PID)密钥对继电器中心采用的中继侧系统,用于修改传输流的PID并产生失真的程序特定信息(PSI); 以及根据终端侧PID密钥被用于DMB终端的终端侧系统,用于恢复从中继中心接收的传输流的失真PSI并对其进行解码。 该方法包括以下步骤:当通过TS的节目映射表(PMT)分析获得的音频/视频PID解复用TS时,识别TS的实际PID是否一致; 产生预设的报警信号; 根据终端侧PID修改PMT中的音频/视频数据的PID; 并根据修改的PID值解复用TS。
    • 7. 发明授权
    • Wide-band fiber amplifier
    • 宽带光纤放大器
    • US07081989B2
    • 2006-07-25
    • US10688560
    • 2003-10-17
    • Kwan-Woong SongJun-Ho KohSeong-Taek HwangYun-Je Oh
    • Kwan-Woong SongJun-Ho KohSeong-Taek HwangYun-Je Oh
    • H04B10/12H01S4/00
    • H01S3/094003H01S3/06754H01S3/094023H01S3/2383
    • Disclosed is a wide-band fiber amplifier for amplifying C-band and L-band optical signals, including a first amplifying unit including a first amplifying fiber adapted to be (1) pumped in at least one direction (2) amplify both the C-band and L-band optical signals and (3) output Amplified Spontaneous Emission (ASE), a second amplifying unit including a second amplifying fiber adapted to be pumped by amplified ASE and secondarily amplify the amplified L-band optical signal, and an L-band pumping light source including a third amplifying fiber adapted to be pumped in at least one direction while being pumped by the ASE, and output amplified ASE used to pump the second amplifying fiber.
    • 公开了一种用于放大C波段和L波段光信号的宽带光纤放大器,包括第一放大单元,该第一放大单元包括第一放大光纤,该第一放大单元适于(1)在至少一个方向上泵浦(2) 频带和L波段光信号,以及(3)输出放大自发辐射(ASE),第二放大单元,包括适于被放大的ASE泵浦的第二放大光纤,并且二次放大放大的L波段光信号, 带泵浦光源,包括适于在被ASE泵浦的同时被泵浦至少一个方向的第三放大光纤,以及用于泵浦第二放大光纤的输出放大的ASE。