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    • 3. 发明授权
    • MPEG-2 decoding system and method
    • MPEG-2解码系统及方法
    • US07400652B2
    • 2008-07-15
    • US10861205
    • 2004-06-04
    • Kwan-Lae KimSung-Jin ParkJun-Ho KohYoung-Seok KimYun-Je Oh
    • Kwan-Lae KimSung-Jin ParkJun-Ho KohYoung-Seok KimYun-Je Oh
    • H04H20/28H04H11/02
    • H04N21/4383H04N5/4401H04N21/4334H04N21/434H04N21/4345H04N21/4384
    • In an MPEG-2 decoding system, a transport decoder decodes a transport packet corresponding to a Program Identification (PID) from an input transport stream, and retrieves a Program Association Table/Program Map Table PAT/PMT) from the stream when it is requested to retrieve Program Specific lnformation (PSI). A pre-decoder checks PSI stored in a PSI memory in response to a request to change to a desired channnel, reads PIDs of transport packets for a Packetized Elementary Stream (PES) of a program corresponding to the desired channel from the PSI memory to provide it to the transport decoder, receives the PAT/PMT and updates the contents of the memory using the PAT/PMT. After decoding, PSI previously extracted therefrom is stored in the memory. PIDs of transport packets for the PES of desired program are obtained referring to the stored PSI, and transport packets having the PIDs are retrieved and decoded.
    • 在MPEG-2解码系统中,传输解码器从输入传输流解码对应于节目识别(PID)的传输分组,并且在请求时从流中检索节目关联表/节目映射表PAT / PMT) 检索程序特定信息(PSI)。 响应于要改变到所需信道的请求,预解码器检查存储在PSI存储器中的PSI,从PSI存储器读取对应于期望信道的节目的分组化基本流(PES)的传输分组的PID,以提供 它到传输解码器,接收PAT / PMT,并使用PAT / PMT更新存储器的内容。 在解码之后,先前提取的PSI被存储在存储器中。 通过存储的PSI获得所需节目的PES的传输分组的PID,并且检索并解码具有PID的传输分组。
    • 8. 发明授权
    • 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
    • US07388888B2
    • 2008-06-17
    • US10861058
    • 2004-06-04
    • Seung-Jin LeeJae-Hun ChoYun-Je OhJun-Ho Koh
    • Seung-Jin LeeJae-Hun ChoYun-Je OhJun-Ho Koh
    • H04J3/04
    • H04Q11/0067H04L12/64H04Q2011/0064
    • A broadcast/communication convergence system and method for transmitting and receiving Ethernet data by an optical network unit (ONU) performing a time division multiplexing (TDM) operation and switching by a network switch. A resultant signal is transmitted to a corresponding subscriber set-top box (SSTB), and data from the SSTB is provided to the network switch. A length of an Ethernet data frame is provided from the network switch, and an encapsulation generates and inserts data length information into an Ethernet data frame, for transmission to the SSTB. The SSTB carries out a TDM operation for a signal transmitted from the ONU, and separates the signal into Ethernet and broadcast data. A framing bit is detected based on a result of the separated signals, the length information is detected. A preamble bit and a start-of-field delimiter (SFD) are inserted into the recognized Ethernet data to recover the original Ethernet data.
    • 一种广播/通信会聚系统和方法,用于通过执行时分复用(TDM)操作的光网络单元(ONU)和通过网络交换机切换来发送和接收以太网数据。 结果信号被发送到相应的用户机顶盒(SSTB),并且来自SSTB的数据被提供给网络交换机。 从网络交换机提供一长度的以太网数据帧,封装生成并将数据长度信息插入到以太网数据帧中,以传输到SSTB。 SSTB对从ONU发送的信号进行TDM操作,并将信号分离成以太网和广播数据。 基于分离信号的结果检测成帧位,检测长度信息。 将前导码位和起始字段分隔符(SFD)插入识别的以太网数据中以恢复原始以太网数据。
    • 10. 发明授权
    • Apparatus and method for forward error correction
    • 前向纠错装置及方法
    • US07120848B2
    • 2006-10-10
    • US10358535
    • 2003-02-05
    • Yong-Deok KimYun-Je OhJun-Ho KohHan-Lim LeeByung-Jik KimChan-Youl Kim
    • Yong-Deok KimYun-Je OhJun-Ho KohHan-Lim LeeByung-Jik KimChan-Youl Kim
    • H03M13/00
    • H04L1/0047
    • The provided forward error correction (FEC) apparatus for a transmission system includes a low pass filter (LPF) passing only a low frequency component of an input signal having a predetermined transmission rate; an AC power meter converting an energy value of an signal output from the LPF into a DC voltage value; a logarithm amplifier converting the exponentially varying DC voltage value from the AC power meter into a linear logarithmically varying DC voltage value; a digital signal processor (DSP) determining the transmission rate of the input signal according to a magnitude of the linear DC voltage value and outputting a control signal according to the transmission rate; a clock generator receiving the control signal and generating a clock signal according to the control signal; and a FEC module receiving the clock signal and performing FEC operation on the received signal. A method for FEC is also provided.
    • 所提供的用于传输系统的前向纠错(FEC)装置包括仅通过具有预定传输速率的输入信号的低频分量的低通滤波器(LPF); 将从LPF输出的信号的能量值转换为DC电压值的AC功率计; 对数放大器将来自AC功率计的指数变化的DC电压值转换成线性对数变化的DC电压值; 数字信号处理器(DSP),根据线性DC电压值的大小确定输入信号的传输速率,并根据传输速率输出控制信号; 接收所述控制信号并根据所述控制信号产生时钟信号的时钟发生器; 以及FEC模块,接收时钟信号并对接收到的信号执行FEC操作。 还提供了一种用于FEC的方法。