• DocumentCode
    432781
  • Title

    Direct N-point DCT computation from three adjacent N/3-point DCT coefficients

  • Author

    Pei, Soo-Cliatig ; Kao, Meng-Ping

  • Author_Institution
    Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
  • Volume
    2
  • fYear
    2004
  • fDate
    24-27 Oct. 2004
  • Firstpage
    1113
  • Abstract
    An efficient method for computing a length-N DCT given three consecutive length-N/3 DCTs is proposed. This method differs from previous ones in that it reduces considerable arithmetic operations and uses only length-N/3 DCTs instead of length-N DCTs. We also find its great applications in fractional scaling of a DCT-based image by the factor of N/2α3β. This would be very useful in HDTV standard, whose display size is usually 16:9. The comparison with conventional methods is provided in this paper.
  • Keywords
    discrete cosine transforms; high definition television; television standards; transform coding; video coding; HDTV standard; adjacent N/3-point DCT coefficient; direct N-point DCT computation; discrete cosine transform; fractional scaling; Convolution; Digital signal processing; Discrete cosine transforms; Displays; Image coding; Interpolation; Signal processing algorithms; Transform coding; Video compression;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Image Processing, 2004. ICIP '04. 2004 International Conference on
  • ISSN
    1522-4880
  • Print_ISBN
    0-7803-8554-3
  • Type

    conf

  • DOI
    10.1109/ICIP.2004.1419498
  • Filename
    1419498
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=432781