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    • 2. 发明申请
    • SOURCE-CHANNEL COMBINED CODING METHOD AND SATELLITE BROADCASTING SYSTEM USING THE SAME
    • 源信道组合编码方法和使用该方法的卫星广播系统
    • US20110131615A1
    • 2011-06-02
    • US12957272
    • 2010-11-30
    • In Ki LEEDae Ig ChangKwang Deok SeoWon Sup Chi
    • In Ki LEEDae Ig ChangKwang Deok SeoWon Sup Chi
    • H04N7/20H04B17/00
    • H04N7/20H04H20/51H04H20/74H04H40/90
    • A source-channel combined coding method including: determining whether a channel signal-to-noise ratio (SNR) is varied or not; when it is determined that the channel SNR is varied, selecting a MODCOD suitable for the channel SNR by referring to a first table defining an SNR threshold value at which data transmission is performed without an error, for each MODCOD designating a low density parity check (LDPC) code rate and a modulation scheme; calculating a source coding rate by using an effective information bit rate of the selected MODCOD; extracting network abstraction layer (NAL) units for each layer from an inputted video frame so as to satisfy the calculated source coding rate, and packetizing the extracted NAL units; binding packets to configure a baseband (BB) frame; and LDPC coding and modulating the BB frame through the code rate and the modulation scheme which are designated by the selected MODCOD.
    • 源信道组合编码方法,包括:确定信道信噪比(SNR)是否变化; 当确定信道SNR变化时,通过参考指定低密度奇偶校验的每个MODCOD,通过参考定义不进行数据传输的SNR阈值的第一表来选择适合于信道SNR的MODCOD( LDPC)码率和调制方案; 通过使用所选MODCOD的有效信息比特率来计算源编码率; 从输入的视频帧中提取每层的网络抽象层(NAL)单元,以便满足所计算的源编码率,并对所提取的NAL单元进行打包; 绑定数据包以配置基带(BB)帧; 以及通过由选择的MODCOD指定的码率和调制方案对BB帧进行LDPC编码和调制。
    • 3. 发明授权
    • Source-channel combined coding method and satellite broadcasting system using the same
    • 源通道组合编码方法和卫星广播系统使用相同
    • US08707126B2
    • 2014-04-22
    • US12957272
    • 2010-11-30
    • In Ki LeeDae Ig ChangKwang Deok SeoWon Sup Chi
    • In Ki LeeDae Ig ChangKwang Deok SeoWon Sup Chi
    • H03M13/00
    • H04N7/20H04H20/51H04H20/74H04H40/90
    • A source-channel combined coding method including: determining whether a channel signal-to-noise ratio (SNR) is varied or not; when it is determined that the channel SNR is varied, selecting a MODCOD suitable for the channel SNR by referring to a first table defining an SNR threshold value at which data transmission is performed without an error, for each MODCOD designating a low density parity check (LDPC) code rate and a modulation scheme; calculating a source coding rate by using an effective information bit rate of the selected MODCOD; extracting network abstraction layer (NAL) units for each layer from an inputted video frame so as to satisfy the calculated source coding rate, and packetizing the extracted NAL units; binding packets to configure a baseband (BB) frame; and LDPC coding and modulating the BB frame through the code rate and the modulation scheme which are designated by the selected MODCOD.
    • 源信道组合编码方法,包括:确定信道信噪比(SNR)是否变化; 当确定信道SNR变化时,通过参考指定低密度奇偶校验的每个MODCOD,通过参考定义不进行数据传输的SNR阈值的第一表来选择适合于信道SNR的MODCOD( LDPC)码率和调制方案; 通过使用所选MODCOD的有效信息比特率来计算源编码率; 从输入的视频帧中提取每层的网络抽象层(NAL)单元,以便满足所计算的源编码率,并对所提取的NAL单元进行打包; 绑定数据包以配置基带(BB)帧; 以及通过由选择的MODCOD指定的码率和调制方案对BB帧进行LDPC编码和调制。