• DocumentCode
    2604248
  • Title

    Improved Chen-Smith image coder

  • Author

    Rubino, Eduardo M. ; Malvar, Henrique S. ; De Queiroz, Ricardo L.

  • Author_Institution
    Dept. de Engenharia Eletrica, Brasilia Univ., Brazil
  • fYear
    1993
  • fDate
    3-6 May 1993
  • Firstpage
    267
  • Abstract
    An image compression system based on transform coding and zonal sampling is presented. It is based on the Chen-Smith coder, but with an improved technique for transform coefficient quantization and the replacement of the discrete cosine transform (DCT) by the lapped orthogonal transform (LOT). The system leads to signal-to-noise ratios that are from 1.5 to 2.0 dB above those obtained with the standard JPEG algorithm, for a wide variety of test images and compression rates
  • Keywords
    data compression; image coding; image sampling; transform coding; Chen-Smith image coder; compression rates; image compression system; lapped orthogonal transform; signal-to-noise ratios; test images; transform coding; transform coefficient quantization; zonal sampling; Bismuth; Bit rate; Code standards; Decoding; Discrete cosine transforms; Discrete transforms; Image coding; Quantization; Signal processing algorithms; Transform coding;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Circuits and Systems, 1993., ISCAS '93, 1993 IEEE International Symposium on
  • Conference_Location
    Chicago, IL
  • Print_ISBN
    0-7803-1281-3
  • Type

    conf

  • DOI
    10.1109/ISCAS.1993.393709
  • Filename
    393709