JP2005136990A - 減少されたメモリの低密度パリティチェック(ldpc)コードを提供する方法および装置 - Google Patents
減少されたメモリの低密度パリティチェック(ldpc)コードを提供する方法および装置 Download PDFInfo
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- JP2005136990A JP2005136990A JP2004312741A JP2004312741A JP2005136990A JP 2005136990 A JP2005136990 A JP 2005136990A JP 2004312741 A JP2004312741 A JP 2004312741A JP 2004312741 A JP2004312741 A JP 2004312741A JP 2005136990 A JP2005136990 A JP 2005136990A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/20—Adaptations for transmission via a GHz frequency band, e.g. via satellite
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
- H03M13/25—Error detection or forward error correction by signal space coding, i.e. adding redundancy in the signal constellation, e.g. Trellis Coded Modulation [TCM]
- H03M13/255—Error detection or forward error correction by signal space coding, i.e. adding redundancy in the signal constellation, e.g. Trellis Coded Modulation [TCM] with Low Density Parity Check [LDPC] codes
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
- H03M13/03—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words
- H03M13/05—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits
- H03M13/11—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits using multiple parity bits
- H03M13/1102—Codes on graphs and decoding on graphs, e.g. low-density parity check [LDPC] codes
- H03M13/1148—Structural properties of the code parity-check or generator matrix
- H03M13/118—Parity check matrix structured for simplifying encoding, e.g. by having a triangular or an approximate triangular structure
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
- H03M13/29—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes combining two or more codes or code structures, e.g. product codes, generalised product codes, concatenated codes, inner and outer codes
- H03M13/2906—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes combining two or more codes or code structures, e.g. product codes, generalised product codes, concatenated codes, inner and outer codes using block codes
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- Astronomy & Astrophysics (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Error Detection And Correction (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
- Detection And Correction Of Errors (AREA)
Abstract
【解決手段】LDPCエンコーダ(203)がアウタBose Chaudhuri Hocqenghem(BCH)コードを有するLDPCコードを発生させる。レート3/5コードに対して、アプローチは、“未修正”レート3/5コードに対して、性能に大きな影響を与えることなく、エッジ値の記憶に対する減少されたメモリ要求を生み出すデグリープロファイルを提供する。減少されたメモリのLDPCコードに対する関連パラメータは次の通りである。q=72、nldpc=64800、kldpc=nBCH=38880、kBCH=38688。上記アプローチは衛星を通してのデジタルビデオブロードキャストサービスに特定のアプリケーションを有する。
【選択図】 図1
Description
ここで、Bは低位三角行列である。
a00i0+a01i1+…+a0,k-1ik-1+p0=0→p0を解き、
a10i0+a11i1+…+a1,k-1ik-1+b10p0+p1=0→p1を解き、
p2,p3,…,pn-k-1に対して同様である。
Claims (13)
- LDPCコード化信号を変調し、
変調信号を送信することをさらに含む請求項1記載の方法。 - 変調信号はブロードバンド衛星アプリケーションのサポートで衛星リンク(103)を通して送信される請求項2記載の方法。
- 変調ステップは、8−PSK(位相偏移変調)、16−QAM(直交振幅変調)、QPSK(4相位相偏移変調)、16−APSK(振幅位相偏移変調)および32−APSKのうちの1つを含む信号配列にしたがって実行される請求項2記載の方法。
- エンコーディングするための命令を記憶しているコンピュータ読み取り可能な媒体において、
前記命令は、実行時に1つ以上のプロセッサに請求項1記載の方法を実行させるように構成されている媒体。 - LDPCコード化信号が変調されて衛星リンク(103)を通して送信される請求項6記載のエンコーダ(203,211)。
- 変調信号はブロードバンド衛星アプリケーションのサポートにある請求項7記載のエンコーダ(203,211)。
- 変調は、8−PSK(位相偏移変調)、16−QAM(直交振幅変調)、QPSK(4相位相偏移変調)、16−APSK(振幅位相偏移変調)および32−APSKのうちの1つを含む信号配列にしたがって実行される請求項7記載のエンコーダ(203,211)。
- LDPCコード化信号を変調するように構成された変調器をさらに具備する請求項10記載の装置(200)。
- 変調信号はブロードバンド衛星アプリケーションのサポートで衛星リンク(103)を通して送信される請求項11記載の装置(200)。
- 変調は8−PSK(位相偏移変調)、16−QAM(直交振幅変調)、QPSK(4相位相偏移変調)、16−APSK(振幅位相偏移変調)および32−APSKのうちの1つを含む信号配列にしたがって実行される請求項11記載の装置(200)。
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US51468003P | 2003-10-27 | 2003-10-27 |
Publications (2)
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JP2005136990A true JP2005136990A (ja) | 2005-05-26 |
JP4109241B2 JP4109241B2 (ja) | 2008-07-02 |
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JP2004312741A Expired - Fee Related JP4109241B2 (ja) | 2003-10-27 | 2004-10-27 | 減少されたメモリの低密度パリティチェック(ldpc)コードを提供する方法および装置 |
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US (2) | US7234098B2 (ja) |
EP (1) | EP1528687A1 (ja) |
JP (1) | JP4109241B2 (ja) |
KR (1) | KR100695380B1 (ja) |
CN (1) | CN100341264C (ja) |
CA (1) | CA2486044C (ja) |
HK (1) | HK1078697A1 (ja) |
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KR100808664B1 (ko) | 2006-12-08 | 2008-03-07 | 한국전자통신연구원 | 패리티 검사행렬 저장 방법 및 이를 이용한 블록 저밀도패리티 검사 부호화 방법 및 장치 |
JP2012054853A (ja) * | 2010-09-03 | 2012-03-15 | Sony Corp | データ処理装置、及びデータ処理方法 |
JP2012065131A (ja) * | 2010-09-16 | 2012-03-29 | Sony Corp | データ処理装置、及びデータ処理方法 |
WO2014123015A1 (ja) * | 2013-02-08 | 2014-08-14 | ソニー株式会社 | データ処理装置、及びデータ処理方法 |
WO2014123018A1 (ja) * | 2013-02-08 | 2014-08-14 | ソニー株式会社 | データ処理装置、及びデータ処理方法 |
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- 2004-10-27 CN CNB2004100104257A patent/CN100341264C/zh not_active Expired - Fee Related
- 2004-10-27 EP EP04256630A patent/EP1528687A1/en not_active Ceased
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US11177832B2 (en) | 2013-02-08 | 2021-11-16 | Saturn Licensing Llc | Data processing apparatus and data processing method |
US11218170B2 (en) | 2013-02-08 | 2022-01-04 | Saturn Licensing Llc | Data processing apparatus and data processing method |
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CN1642063A (zh) | 2005-07-20 |
CA2486044C (en) | 2008-05-06 |
HK1078697A1 (en) | 2006-03-17 |
US7770089B2 (en) | 2010-08-03 |
US20070226578A1 (en) | 2007-09-27 |
CA2486044A1 (en) | 2005-04-27 |
EP1528687A1 (en) | 2005-05-04 |
US20050091565A1 (en) | 2005-04-28 |
US7234098B2 (en) | 2007-06-19 |
CN100341264C (zh) | 2007-10-03 |
JP4109241B2 (ja) | 2008-07-02 |
KR20050040770A (ko) | 2005-05-03 |
KR100695380B1 (ko) | 2007-03-15 |
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