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Development of multidimensional variable rate sampling method and its application to high definition image cmmunications

Research Project

Project/Area Number 03650277
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 InstitutionEhime University

Principal Investigator

YAMADA Yoshio  Ehime University, Faculty of Engineering, Associate Professor, 工学部, 助教授 (00110833)

Co-Investigator(Kenkyū-buntansha) TAZAKI Saburo  Ehime University, Faculty of Engineering, Professor, 工学部, 教授 (00036394)
Project Period (FY) 1991 – 1993
Project Status Completed (Fiscal Year 1993)
Budget Amount *help
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1993: ¥200,000 (Direct Cost: ¥200,000)
Fiscal Year 1992: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1991: ¥1,500,000 (Direct Cost: ¥1,500,000)
Keywordsvariable rate sampling / vector quantization / high definition image / データ圧縮 / 高精細画像信号 / 画質評価尺度 / デ-タ圧縮
Research Abstract

The key to the successful design of the systems that utilize the variable rate sampling is the way of ajusting trade-offs between the distortions due to sampling and quantization. It is difficult to design the sampler and quantizer that are simultaneously optimum to the input signal since the quantizer is built in the recursive closed loop of the encoder using adaptive sampling. In this project, we utilize the vector quantizer based on the generalized companding model within the encoder closed loop for resolving this problem. The results of this project are summaried as follows.
(1) Objective evaluation tests are conducted using reproduced images under many different conditions on sampling rate and quantizer bit rate. It is found that good coincidence is observed between the objective reproduction quality of image and the subjective quality measure, SNR.
(2) Moreover, the investigations are done on the SNR vs.sampling rate and the SNR vs.the quantizer bit rate, and the mutual relations of these parameters. It is found that simply minimizing the total distotions due to sampling and quantization gives good coding performance.
(3) In order to control the distortions due to sampling and quantization, two image data compression methods are developed. One of them is based on the vector quantization of the piece-wise bi-linear patch, and the other is based on the recursive vector quantization mothod. In both systems, the sampling rate is adaptively controlled so as to fit the local feature of the image.
(4) A method for designing companded vector quantizers that is described by using the quadratic-norm based companding model is developed.
(5) Fast encoding algorithms of vector quantization are developed.

Report

(4 results)
  • 1993 Annual Research Report   Final Research Report Summary
  • 1992 Annual Research Report
  • 1991 Annual Research Report
  • Research Products

    (15 results)

All Other

All Publications (15 results)

  • [Publications] Y.Yamada: "Recursive vector quantization for monochrome video signals" IEICE Trans.E74. 399-405 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] T.Fukunaga: "A fast algorithm for vector quantization design" Proc.1991 Picture Coding Symposium. 89-92 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] T.Fukunaga: "Fast VQ algorithm using scalar prequantization" Proc.ICCS and ISITA Joint Symposium(Singapore). 63-66 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Y.Yamada: "Fast encoding algorithm for vector quantization with an uncostrained codebook" Proc.1993 Picture Coding Symposium. 9.5.1-9.5.2 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 山田芳郎: "内積ノルムに基づく圧伸モデルを用いたベクトル量子化器設計" 電子情報通信学会論文集. J76-A. 568-570 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Y.Yamada, S.Tazaki: ""Recursive vector quantization for monochrome video signals"" IEICE Trans.E74,2. 399-405 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] T.Fukunaga, Y.Yamada, S.Tazaki: ""A fast algorithm for vector quantization design"" Proc.1991 Picture Coding Symposium. 89-92 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] T.Fukunaga, Y.Yamada, Y.Ono, S.Tazaki: ""Fast VQ algorithm using scalar prequantization"" Proc.ICCS and ISITA Foint Symposium(Singapore). 63-66 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Y.Yamada, S.Sone, T.Fukunaga, S.Tazaki: ""Fast encoding algorithm for vector quantization with an uncostrained codebook"" Proc.1993 Picture Coding Symposium. 9.5.1-9.5.2 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Y.Yamada, S.Tazaki: ""Vector quantizer design using quadratic-norm based companding model"" IEICE Japan Trans.J76-A,3. 568-570 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Y.Yamada: "Fast encoding algorithm for vector quantization with an uncostrained codebook" Proc.1993 Picture Coding Symposium. 9.5.1-9.5.2 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 山田芳郎: "内積ノルムに基づく圧伸モデルを用いたベクトル量子化器設計" 電子情報通信学会論文誌. J76-A. 568-570 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 山田 芳郎: "内積ノルムに基づく圧伸モデルを用いたベクトル量子化器設計" 電子情報通信学会論文誌. Vol.J76-A. (1993)

    • Related Report
      1992 Annual Research Report
  • [Publications] 山田 芳郎: "区分的双一次パッチのベクトル量子化に基づく画像デ-タ圧縮手法" 第14回情報理論とその応用シンポジウム講演論文集. 185-188 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 山田 芳郎: "可変密度標本化されたカラ-画像の画質評価について[I]" 電子情報通信学会・情報理論研究会技術報告. (1992)

    • Related Report
      1991 Annual Research Report

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

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