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Research on Redundancy Control of Analog Signal

Research Project

Project/Area Number 01550268
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 電子通信系統工学
Research InstitutionKyushu University

Principal Investigator

MOTOISHI Kohji  Kyushu University, Faculty of Eng., Associate Professor, 工学部, 助教授 (00038118)

Co-Investigator(Kenkyū-buntansha) SUHARA Yosiro  Kyushu University, Faculty of Eng., Research Assistant, 工学部, 助手 (80187799)
KOHDA Tohru  Kyushu University, Faculty of Eng., Associate Professor, 工学部, 助教授 (20038102)
NISHI Tetsuo  Kyushu University, Faculty of Eng., Professor, 工学部, 教授 (40037908)
KOGA Tosiro  Kyushu University, Faculty of Eng., Professor, 工学部, 教授 (00037706)
Project Period (FY) 1989 – 1990
Project Status Completed (Fiscal Year 1990)
Budget Amount *help
¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 1990: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1989: ¥1,000,000 (Direct Cost: ¥1,000,000)
KeywordsData Compression / Error Correction / Discrete Cosine Transform / Impulse Rejection / Analog DCT code / インパルス除法 / アナログ符号
Research Abstract

Generally, data compression is performed in the analog domain and error correction is performed in the digital domain. So far it was difficult to realize data compression and error correction as a whole, although both techniques are related to redundancy control. In this research, we studied a unified technique of redundancy control.
1. Discrete Cosine Transform (DCT) is well known as an excellent data compression technique for the voice and image data. We investigated DCT from a new angle on the analog codes.
2. By modifying appropriately, DCT is able to have error correcting ability. We call this as DCT analog code.
3. The error correcting capability of the DCT analog code is [L/4]. By expanding receiving sequence in a mirror-symmetric form, we can improve the capability to [L/2]. L is the number of additional redundancy points and [.] is denoted as the gaussian symbol.
4. The Berlekamp-Massy algorithm or the Euclidian algorithm can be principally adopted as a decoding algorithm. However, these algorithms are not robust against the stationary gaussian noise on the communication channel.
5. In order to reduce the influence of the stationary gaussian noise, we studied the co-variance method and a kind of the majority voting method. The majority voting method with orthogonal vectors very well performed in case of short code length.
A demerit of majority voting method is that the number of orthogonal vectors rapidly increases as the code length is longer. The reduction of the number of orthogonal vectors is a subject for a future study.

Report

(3 results)
  • 1990 Annual Research Report   Final Research Report Summary
  • 1989 Annual Research Report
  • Research Products

    (19 results)

All Other

All Publications (19 results)

  • [Publications] 元石 浩二: "離散コサイン変換のアナログ符号への適用" 第12回情報理論とその応用シンポジウム. 35-40 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 三角 武嗣, 元石 浩二: "DCTアナログ符号におけるインパルスノイズの除去" 電子通信学会技術研究報告. CAS90. 1-6 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 元石 浩二: "冗長性制御符号化について" 電子情報通信学会論文誌. J73ーA. 1453-1455 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 元石 浩二: "DCTアナログ符号の符号化と復号化" 九州大学工学集報. 63. 331-336 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 三角 武嗣, 元石 浩二: "DCTアナログ符号におけるインパルスノイズの除去" 九州大学工学集報.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 元石 浩二: "アダマ-ル行列の列独立数" 電子情報通信学会論文誌.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Kohji MOTOISHI: "Application of Discrete Cosine Transform to an Analog Code" The 12th Symposium on Information Theory and Its Application. 35-40 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Takesi MISUMI and Kohji MOTOISHI: "Impulse Noise Elimination on DCT Analog Code" IEICE Technical Report. DSP90-5. 1-6 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Kohji MOTOISHI: "On a Redundancy Control Coding" IEICE J73-A. 1453-1455 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Kohji MOTOISHI: "Coding and Decoding of DCT Analog Code" Technology Reports of Kyushu University. Vol. 63. 331-336 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Takesi MISUMI and Kohji MOTOISHI: "Impulse Noise Elimination on DCT Analog Code" Technology Reports of Kyushu University.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Kohji MOTOISHI: "Column Independent Number of Hadamard Matrix" IEICE.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 元石 浩二: "冗長性制御符号化について" 電子情報通信学会論文誌. J73ーA. 1453-1455 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 元石 浩二: "DCTアナログ符号の符号化と復号化" 九州大学工学集報. 63. 331-336 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 元石 浩二: "DCTアナログ符号におけるインパルスノイズの除去" 九州大学工学集報.

    • Related Report
      1990 Annual Research Report
  • [Publications] 元石 浩二: "アダマ-ル行列の列独立数" 電子情報通信学会論文誌.

    • Related Report
      1990 Annual Research Report
  • [Publications] 元石浩二: "離散コサイン変換のアナログ符号への適用" 第12回情報理論とその応用シンポジウム. 35-40 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] 元石浩二: "冗長性制御符号化について" 電子情報通信学会論文誌.

    • Related Report
      1989 Annual Research Report
  • [Publications] 元石浩二: "DCTアナログ信号の符号化と復合化" 九州大学工学部集報.

    • Related Report
      1989 Annual Research Report

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Published: 1989-04-01   Modified: 2016-04-21  

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