公开(公告)号：US20100138726A1

公开(公告)日：2010-06-03

申请号：US12629343

申请日：2009-12-02

Applicant: In Ki LEE ,  Dae Ig CHANG ,  Ho Jin LEE

Inventor： In Ki LEE ,  Dae Ig CHANG ,  Ho Jin LEE

IPC: H03M13/15 ,  G06F11/10

CPC classification number: H03M13/15 ,  H03M13/1515 ,  H03M13/154 ,  H03M13/1545 ,  H03M13/1575

Abstract: A decoding method of an MPE-FEC (MultiProtocol Encapsulation-Forward Error Correction) RS (Reed-Solomon) decoder, includes: substituting a value corresponding to an erasure error position with 0 in a reception signal; calculating a syndrome by using the reception signal; calculating an erasure position polynomial by using erasure information; calculating a modified syndrome by using the syndrome and the erasure position polynomial; calculating an erasure error size polynomial by using the modified syndrome; calculating an error position by using the erasure position polynomial; calculating an error size by using a modified Formey's algorithm; and correcting an error through the error position and the error size.

Abstract translation: MPE-FEC（多协议封装前向纠错）RS（里德 - 所罗门）解码器的解码方法包括：在接收信号中用0代替与擦除错误位置相对应的值; 通过使用接收信号来计算综合征; 通过使用擦除信息来计算擦除位置多项式; 通过使用综合征和擦除位置多项式计算修正综合征; 通过使用修正的综合征计算擦除误差大小多项式; 通过使用擦除位置多项式来计算误差位置; 通过使用修改的Formey算法计算错误大小; 并通过错误位置和错误大小纠正错误。

公开(公告)号：US20080137775A1

公开(公告)日：2008-06-12

申请号：US11931074

申请日：2007-10-31

Applicant: Tae Hoon KIM ,  In Ki LEE ,  Seung Hyun CHOI ,  Cheon In OH ,  Dae Ig CHANG ,  Ho Jin LEE ,  Sung Hoon LEE ,  Goon Seop LEE ,  Dong Hahk LEE ,  Jae Hwang YU

Inventor： Tae Hoon KIM ,  In Ki LEE ,  Seung Hyun CHOI ,  Cheon In OH ,  Dae Ig CHANG ,  Ho Jin LEE ,  Sung Hoon LEE ,  Goon Seop LEE ,  Dong Hahk LEE ,  Jae Hwang YU

IPC: H04L27/20 ,  H03D3/22 ,  H04L27/22

CPC classification number: H04L27/183

Abstract: Provided are a method and apparatus for hierarchical modulation and demodulation in a Digital Multimedia Broadcasting (DMB) system. The method for hierarchical modulation in a digital broadcast signal transmitter includes the steps of: receiving a first broadcast signal and a second broadcast signal from outside, and encoding the broadcast signals by a first method and a second method, respectively; synthesizing the encoded first and second broadcast signals; determining a modulation point using a constellation diagram of an I-Q plane corresponding to the synthesized signal; and hierarchically phase-shift modulating the synthesized signal using the determined modulation point. Here, in the I-Q plane, the modulation point is deviated by a predetermined deviation angle from a phase axis passing through a modulation point of the first broadcast signal and an origin of the I-Q plane.

Abstract translation: 提供了一种用于数字多媒体广播（DMB）系统中的分级调制和解调的方法和装置。 数字广播信号发射机中的分级调制方法包括以下步骤：从外部接收第一广播信号和第二广播信号，并分别通过第一种方法和第二种方法对广播信号进行编码; 合成编码的第一和第二广播信号; 使用与合成信号对应的I-Q平面的星座图确定调制点; 以及使用所确定的调制点对合成信号进行分层相移。 这里，在I-Q平面中，调制点偏离了通过第一广播信号的调制点的相位轴和I-Q平面的原点的预定偏差角。

公开(公告)号：US20110131615A1

公开(公告)日：2011-06-02

申请号：US12957272

申请日：2010-11-30

Applicant: In Ki LEE ,  Dae Ig Chang ,  Kwang Deok Seo ,  Won Sup Chi

Inventor： In Ki LEE ,  Dae Ig Chang ,  Kwang Deok Seo ,  Won Sup Chi

IPC: H04N7/20 ,  H04B17/00

CPC classification number: H04N7/20 ,  H04H20/51 ,  H04H20/74 ,  H04H40/90

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20100142625A1

公开(公告)日：2010-06-10

申请号：US12631989

申请日：2009-12-07

Applicant: In Ki LEE ,  Dae Ig CHANG ,  Kwang Deok SEO ,  Won Sup CHI

Inventor： In Ki LEE ,  Dae Ig CHANG ,  Kwang Deok SEO ,  Won Sup CHI

IPC: H04N7/26

CPC classification number: H04N21/234327 ,  H04N21/8451 ,  H04N21/8455

Abstract: A method for generating and processing a hierarchical packetized elementary stream (PES) packet for digital satellite broadcasting based on SVC (Scalable Video Coding) video is disclosed. That is, when SVC video is applied to a digital satellite broadcasting system, a transmitter side can generate a hierarchical PES packet in consideration of a hierarchical structure of SVC video and a receiver side can effectively process a received hierarchical PES packet.

Abstract translation: 公开了一种用于基于SVC（可缩放视频编码）视频产生和处理用于数字卫星广播的分级分组化基本流（PES）分组的方法。 也就是说，当将SVC视频应用于数字卫星广播系统时，考虑到SVC视频的层次结构，发射机侧可以生成分层PES分组，并且接收机侧可以有效地处理接收到的分级PES分组。

公开(公告)号：US20110113308A1

公开(公告)日：2011-05-12

申请号：US12942321

申请日：2010-11-09

Applicant: In Ki LEE ,  Nam Soo Kim ,  Ji Won Jung

Inventor： In Ki LEE ,  Nam Soo Kim ,  Ji Won Jung

IPC: H03M13/03 ,  G06F11/10

CPC classification number: H04L1/0041 ,  H03M13/2771 ,  H03M13/2957 ,  H03M13/6362 ,  H04L1/0066 ,  H04L1/0069

Abstract: Disclosed are an apparatus and a encoding method using a turbo code and a unit and a method of permutation. The apparatus for encoding using a turbo code according to an exemplary embodiment of the present invention includes: a first encoder that encodes 3 bits inputted from first to third blocks each of which is formed of N bits respectively, with recursive systematic convolutional codes to output a first parity bit; a permutation unit that permutates the 3 bits; a second encoder that encodes the permutated 3 bits with the recursive systematic convolutional codes to output a second parity bit; and a puncturing unit that optionally removes the first parity bit and the second parity bit in consideration of a coding rate of a predetermined turbo code to control the coding rate.

Abstract translation: 公开了使用turbo码和单元的装置和编码方法以及置换方法。 根据本发明的示例性实施例的使用turbo码进行编码的装置包括：第一编码器，其编码从第一到第三块输入的3位，每个块分别由N个比特形成，具有递归的系统卷积码，以输出 第一个奇偶位; 排列3位的置换单元; 第二编码器，用递归系统卷积码对置换的3位进行编码，以输出第二奇偶校验位; 以及删截单元，其考虑到预定turbo码的编码率来选择性地去除第一奇偶校验位和第二奇偶校验位，以控制编码率。