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    • 11. 发明授权
    • Time division multiplexing frame for multiplexing different synchronous signals and method for transmitting and receiving the same
    • 用于复用不同同步信号的时分多路复用帧及其发送和接收方法
    • US07499471B2
    • 2009-03-03
    • US10941711
    • 2004-09-15
    • Seung-Jin LeeYun-Je OhJun-Ho KohJae-Hun Cho
    • Seung-Jin LeeYun-Je OhJun-Ho KohJae-Hun Cho
    • H04J4/00
    • H04N21/2365H04J3/07H04J3/1694H04N21/235H04N21/23614H04N21/4347H04N21/4348
    • A TDM (Time Division Multiplexing) frame applicable to digital broadcast data transmission in an FTTH (Fiber To The Home) system and a method for transmitting and receiving the TDM frame is disclosed. The TDM frame and methods are applicable to transmit a plurality of digital broadcast data units having different synchronous clocks using a simple format. The TDM frame for multiplexing digital broadcast and communication signals having different synchronous signals in a broadcast/communication convergence system using an FTTH system comprises a framing bit field for identifying a start and end of the TDM frame seamlessly provided; two MPTS (Multiple-Program Transport Stream) fields respectively having at least one bit assigned for digital broadcast data transmission wherein an amount of input digital broadcast data is adjusted according to a difference between a multiplexing rate and an input rate associated with the digital broadcast data in the digital broadcast data transmission; and a fast Ethernet field having at least one bit assigned for communication data transmission.
    • 公开了适用于FTTH(Fiber To Home)系统中的数字广播数据传输的TDM(时分复用)帧以及TDM帧的发送和接收方法。 TDM帧和方法适用于使用简单格式发送具有不同同步时钟的多个数字广播数据单元。 用于在使用FTTH系统的广播/通信收敛系统中复用具有不同同步信号的数字广播和通信信号的TDM帧包括用于识别无缝提供的TDM帧的开始和结束的成帧位域; 分别具有分配给数字广播数据传输的至少一个比特的两个MPTS(多节目传输流)字段,其中根据复用率和与数字广播数据相关联的输入速率之间的差异来调整输入数字广播数据的量 在数字广播数据传输中; 以及具有至少一个分配给通信数据传输的位的快速以太网字段。
    • 15. 发明申请
    • Apparatus and method for compensating for PCR and data rate
    • 用于补偿PCR和数据速率的装置和方法
    • US20060120383A1
    • 2006-06-08
    • US11296618
    • 2005-12-07
    • Sang-Ho KimJae-Hun ChoChang-Sup ShimYun-Je OhJun-Ho Koh
    • Sang-Ho KimJae-Hun ChoChang-Sup ShimYun-Je OhJun-Ho Koh
    • H04L12/56H04L12/28
    • H04N21/4305
    • A method and apparatus by which a reception device of a communication system can sense and compensate for an error of a program clock reference (PCR), and can sense and compensate for bit rate variation of transmission data in a transmitted MPEG-2 TS. The method and apparatus compensates for a PCR jitter, or a change in a data bit rate, which may occur in processing an MPEG-2 TS in a reception device of the MPEG-2 TS transmission system, thereby preventing the deterioration of image quality due to the jitter or loss of an input MPEG-2 TS data. The apparatus includes a PAT sensing unit for sensing a PAT from a received MPEG-2 TS, a PMT sensing unit for sensing a PMT based on information provided from the PAT sensing unit, a PCR PID unit for sensing a PCR PID based on information provided from the PMT sensing unit and a PCR data unit for outputting a PCR data based on information provided from the PMT sensing unit and PID information provided from the PCR PID unit. The apparatus also includes a PCR comparison/compensation unit receiving the PCR data from the PCR data unit, comparing the received PCR data with a pre-stored PCR data, and compensating for the pre-stored PCR data, and a data rate comparison/compensation unit for receiving data rate information from the PCR data unit, comparing the received data rate with a pre-stored data rate, and compensating for the pre-stored data rate.
    • 通信系统的接收装置可以感测和补偿程序时钟参考(PCR)的错误的方法和装置,并且可以感测和补偿所发送的MPEG-2TS中的传输数据的比特率变化。 所述方法和装置补偿在MPEG-2 TS传输系统的接收装置中处理MPEG-2 TS时可能发生的PCR抖动或数据比特率的变化,从而防止由于MPEG-2 TS传输系统的接收装置的劣化 输入MPEG-2 TS数据的抖动或丢失。 该装置包括用于从接收的MPEG-2 TS感测PAT的PAT感测单元,用于基于从PAT感测单元提供的信息来感测PMT的PMT感测单元,用于基于提供的信息感测PCR PID的PCR PID单元 来自PMT感测单元和PCR数据单元,用于基于从PMT感测单元提供的信息和从PCR PID单元提供的PID信息输出PCR数据。 该装置还包括PCR比较/补偿单元,从PCR数据单元接收PCR数据,将接收的PCR数据与预先存储的PCR数据进行比较,并补偿预存的PCR数据,以及数据比率比较/补偿 单元,用于从PCR数据单元接收数据速率信息,将接收到的数据速率与预先存储的数据速率进行比较,并补偿预存的数据速率。
    • 17. 发明申请
    • Method for transmitting and receiving ethernet data in system based on broadcast/communication convergence
    • 基于广播/通信融合的系统中发送和接收以太网数据的方法
    • US20050169302A1
    • 2005-08-04
    • US10861058
    • 2004-06-04
    • Seung-Jin LeeJae-Hun ChoYun-Je OhJun-Ho Koh
    • Seung-Jin LeeJae-Hun ChoYun-Je OhJun-Ho Koh
    • H04N7/22H04J3/00H04L12/28H04L12/64H04N21/647H04J3/16
    • H04Q11/0067H04L12/64H04Q2011/0064
    • A broadcast/communication convergence system and a method for transmitting and receiving Ethernet data using the same is disclosed. The system is equipped with an optical network unit performing a time division multiplexing operation on the Ethernet data switched by a network switch and a plurality of broadcast data units, transmitting a resultant signal of the operation to a corresponding subscriber set-top box, and providing data from the subscriber set-top box to the network switch. In one aspect of the invention, the optical network unit produces a length of an Ethernet data frame provided from the network switch. An encapsulation operation is carried out by generating data length information and inserting the generated length information into an Ethernet data frame. Encapsulated Ethernet data is transmitted to the subscriber set-top box. The subscriber set-top box carries out a time division demultiplexing operation for a signal transmitted from the optical network unit, and separates the signal into the Ethernet data and broadcast data. When a framing bit is detected from the frame of the Ethernet data based on a result of the separation, the length information is detected from the Ethernet data frame. The Ethernet data frame is counted on the basis of the detected length information and recognizing the Ethernet data. A preamble bit and a start-of-field delimiter (SFD) are inserted into the recognized Ethernet data and the original Ethernet data is recovered.
    • 公开了广播/通信收敛系统以及使用该广播/通信收敛系统发送和接收以太网数据的方法。 该系统配备有光网络单元,对由网络交换机和多个广播数据单元交换的以太网数据进行时分多路复用操作,将该操作的合成信号发送到相应的用户机顶盒,并提供 从用户机顶盒到网络交换机的数据。 在本发明的一个方面,光网络单元产生从网络交换机提供的以太网数据帧的长度。 通过产生数据长度信息并将生成的长度信息插入到以太网数据帧中来执行封装操作。 封装的以太网数据被传送到用户机顶盒。 用户机顶盒对从光网络单元发送的信号进行时分解复用操作,并将信号分离成以太网数据和广播数据。 当基于分离结果从以太网数据的帧检测到成帧位时,从以太网数据帧检测长度信息。 基于检测到的长度信息对以太网数据帧进行计数,并识别以太网数据。 将前导码位和起始字段分隔符(SFD)插入到识别的以太网数据中,并恢复原始以太网数据。