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Evaluations on Speech/Image Coding and Recognition Systems from Information Theoretic Point of View

Research Project

Project/Area Number 03452159
Research Category

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

Allocation TypeSingle-year Grants
Research Field 電子通信系統工学
Research InstitutionKyoto Institute of Technology

Principal Investigator

KASAHARA Masao  Kyoto Institute of Technology, Faculty of Engineering and Design, Professor, 工芸学部, 教授 (30029045)

Co-Investigator(Kenkyū-buntansha) WAKASUGI Koichiro  Kyoto Institute of Technology, Faculty of Engineering and Design, Associate Prof, 工芸学部, 助教授 (40135629)
INABA Hiroyuki  Kyoto Institute of Technology, Faculty of Engineering and Design, Research Assoc, 工芸学部, 助手 (40243117)
KOBAYASHI Yutaka  Kyoto Institute of Technology, Faculty of Engineering and Design, Associate Prof, 工芸学部, 助教授 (40027917)
NIIMI Yasuhisa  Kyoto Institute of Technology, Faculty of Engineering and Design, Professor, 工芸学部, 教授 (00026030)
YOSHIDA Yasuo  Kyoto Institute of Technology, Faculty of Engineering and Design, Professor, 工芸学部, 教授 (80026046)
Project Period (FY) 1991 – 1992
Project Status Completed (Fiscal Year 1992)
Budget Amount *help
¥4,100,000 (Direct Cost: ¥4,100,000)
Fiscal Year 1992: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 1991: ¥3,000,000 (Direct Cost: ¥3,000,000)
KeywordsVector Quantization / Scrambling / Asymmetric Communication Channel / Character Recognition / Error Correcting Code / 非対称過信路 / セキュリティ / 郵便番号 / プリコ-ディング
Research Abstract

There exist various kinds of information sources: Numeric sequences of telephone numbers are an example of no redundant sources, while conventional voice signals correspond to the source with a plenty of redundancy of the order of one magnitude. In this project, we first attempt to code these sources of wide range of redundancy by designing a universal coder, and then evaluate this coding and recognition system from information theoretic point of view. The following results are obtained;
1. Overall distortion of system We focused on a system with a source and an output, and then we defined an overall distortion covering the following items; mutual information I(X,Ya) and I(X,Yd) of the source signal and the retrieved analog/digital signal, quantization error, recognition error.
2. Improvement of recognition rate based on asymmetric error correcting codes For improving recognition rates with a fractal redundancy source, we designed a generalized asymmetric error correcting code. By using this asymmetric error correcting code, the performance of recognition rate was evaluated.
3. Error correcting code for limited error pattem Hand-written numeric characters have a plenty of redundancy when one treats them as image data, however, they have no redundancy as a specific numeric sequence. The numeric character recognition system can be modeled as a limited error pattern communication channel. We designed an error correction code for this specific channel, and the recognition rate of numbers is concluded to be improved.

Report

(3 results)
  • 1992 Annual Research Report   Final Research Report Summary
  • 1991 Annual Research Report
  • Research Products

    (15 results)

All Other

All Publications (15 results)

  • [Publications] 稲葉 宏幸,森井 昌克,笠原 正雄: "Z-チャネルにおける巡回符号の高速最ゆうアルゴリズムに関する二.三の考察" 電子情報通信学会論文誌. J74-B-I. 767-777 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] 稲葉 宏幸,若杉 耕一郎,笠原 正雄: "誤り訂正符号の文字認識システムへの応用" 第15回情報理論とその応用シンポジウム予稿集. 243-246 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] 南 憲明,若杉 耕一郎,笠原 正雄: "ベクトル量子化画像スクランブル方式のセキュリティに関する考察" 電子情報通信学会論文誌. J75-B-I. 802-804 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] 南 憲明,若杉 耕一郎,笠原 正雄: "格子量子化による画像符号化とその評価" 電子情報通信学会技術研究報告. IT92-115. 83-88 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Hiroyuki INABA Masakatu MORII Masao KASAHARA: "Notes on Fast Maximum-Likelihood Decoding-Algorithm of Cyclic Code on Z-channel" Trans. of IEICE. Vol.J74-B-l. 769-777 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Hiroyuki INABA Koichiro WAKASUGI Masao KASAHARA: "A Recognition System using Error Correcting Codes" Proceedings of SITA'92. 243-246 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Noriaki MINAMI Koichiro WAKASUGI Masao KASAHARA: "A Note on Information Security for Image-Scrambling Encryption System Based on Vector Quantization" Trans. on IEICE. Vol.J75-B-l. 802-804 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Noriaki MINAMI Koichiro WAKASUGI Masao KASAHARA: "Picture Coding with Lattice Quantizer and It's Evaluation" Technical Report of IEICE. Vol.IT92. 83-88 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] 稲葉 宏幸,森井 昌克,笠原 正雄: "Zーチャネルにおける巡回符号の高速最ゆう復号アルゴリズムに関する二、三の考察" 電子情報通信学会論文誌. J74-B-1. 769-777 (1991)

    • Related Report
      1992 Annual Research Report
  • [Publications] 稲葉 宏幸,若杉 耕一郎,笠原 正雄: "誤り訂正符号の文字認識システムへの応用" 第15回電報理論とその応用シカポジウム予稿集. 243-246 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 南 憲明,若杉 耕一郎,笠原 正雄: "ベクトル量子化画像スクランブル方法のセキュリティに関する考察" 電子情報通信学会論文誌. J75-B-1. 802-804 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 南 憲明,若杉 耕一郎,笠原 正雄: "格子量子化による画像符号化とその評価" 電子情報通信学会技術研究報告. IT92-115. 83-88 (1993)

    • Related Report
      1992 Annual Research Report
  • [Publications] 南 憲明: "画像情報のセキュリティ確保に関する考察" 信学技報. ISEC91ー8. 55-64 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 寺島 史雄: "誤り訂正符号の認識システムへの応用" 第14回情報理論とその応用予稿集. 1. 69-72 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 小林 豊: "SuskitーII…a speech understanding system based on robust phone spotting" 信学論. E74. 1863-1869 (1991)

    • Related Report
      1991 Annual Research Report

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Published: 1991-04-01   Modified: 2016-04-21  

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