Basic HTML version of Foils prepared 23 February 97

Foil 3 Wavelet compression (3)

From Theory and Practice of Wavelet compression Rome Lab Quarterly Review for CIV -- June 28 96. by Czeslaw Jedrzejek, Tomasz Major *
Existing academic and research software
  • Said & Pearlman (RPI), source available, better than Embedded Zerotree Wavelet (EZW)
Existing but unavailable software (some also for wavelet video)
  • Based on methods known in literature, significantly better than EZW, but of much greater complexity (e.g. wavelet packets, UICC & Princeton, encoding one frame takes several minutes; several minor modifications of EZW adding up to significant final effect, UC Davis)
  • Hybrid encoding: wavelet coding of key frame, Motion estimation in real space, wavelet coding of the displaced frame difference (Sarnoff/Lehigh scheme) (executables might appear with regard to MPEG-4 activities)
Our software
  • of the quality comparable with Lightning Strike, little worse than AccuPress due to lack of pre- and postprocessing, ready to plug in to Netscape (demo)

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