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Description
  • V tomto článku je popsána dvoukanálová zrcadlová banky filtrů a podmínky pro její perfektní rekonstrukci. Tato banka filtrů je použitelná při výpočtu vlnkové transformace. Následuje popis algoritmu výpočtu vlnkové transformace zvaný lifting. Algoritmus lifting je metoda rychlejšího výpočtu vlnkové transformace. Algoritmus je založen na nahrazení všech filtrů v bance filtrů jejich polyfázovými ekvivalenty. Tyto polyfázové ekvivalenty se převedou na jednotlivé kroky liftingu. Analýzou této struktury jsou získány podmínky, které musí jednotlivé kroky liftingu splňovat. Podmínky jsou vypočteny pro jeden dual lifting a jeden primal lifting a dva dual liftingy a jeden primal lifting. Z těchto podmínek se snadno vypočítají konkrétní vlnky. Při použití těchto vlnek v bance filtrů se vždy jedná o banku filtrů s perfektní rekonstrukcí. Z těchto podmínek je možné navrhnout vlnky a je možné je také adaptovat a využít při bezeztrátové kompresi dat. (cs)
  • In this paper a dual channel mirrored filter bank and condition for their perfect reconstruction are described. The filter bank may be used in wavelet transform computing. Description of wavelet transform computing algorithm named lifting follow. Liftingalgorithm is faster method of wavelet transform computing. The basis of this algorithm is in replacing all filters by their polyphase equivalents. The polyphase equivalents are transformed to individual lifting steps. A condition, which the individual lifting steps must fulfill, are obtained by analysis of this structure. The conditions are computed for one dual lifting and one primal lifting and two dual lifting and one primal lifting. The wavelets are simply computed from the conditions. If those w avelets are used in filter bank then the filter bank is filter bank with perfect reconstruction. A wavelet can be designed from these conditions and it can be adapted and used for lossless data compression.
  • In this paper a dual channel mirrored filter bank and condition for their perfect reconstruction are described. The filter bank may be used in wavelet transform computing. Description of wavelet transform computing algorithm named lifting follow. Liftingalgorithm is faster method of wavelet transform computing. The basis of this algorithm is in replacing all filters by their polyphase equivalents. The polyphase equivalents are transformed to individual lifting steps. A condition, which the individual lifting steps must fulfill, are obtained by analysis of this structure. The conditions are computed for one dual lifting and one primal lifting and two dual lifting and one primal lifting. The wavelets are simply computed from the conditions. If those w avelets are used in filter bank then the filter bank is filter bank with perfect reconstruction. A wavelet can be designed from these conditions and it can be adapted and used for lossless data compression. (en)
Title
  • The Lossless Compression by Polyphase Filtering
  • The Lossless Compression by Polyphase Filtering (en)
  • Bezeztrátová komprese dat pomocí polyfázových filtrů (cs)
skos:prefLabel
  • The Lossless Compression by Polyphase Filtering
  • The Lossless Compression by Polyphase Filtering (en)
  • Bezeztrátová komprese dat pomocí polyfázových filtrů (cs)
skos:notation
  • RIV/00216305:26220/06:PU54829!RIV06-MSM-26220___
http://linked.open.../vavai/riv/strany
  • 31-36
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • Z(MSM0021630513)
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 483643
http://linked.open...ai/riv/idVysledku
  • RIV/00216305:26220/06:PU54829
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • wavelet transform, compression, lifting (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...ontrolniKodProRIV
  • [89D450B9DC88]
http://linked.open...v/mistoKonaniAkce
  • Sozopol
http://linked.open...i/riv/mistoVydani
  • Sofia
http://linked.open...i/riv/nazevZdroje
  • Electronics ET'2005
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...UplatneniVysledku
http://linked.open...iv/tvurceVysledku
  • Filka, Miloslav
  • Vrána, Jaroslav
http://linked.open...vavai/riv/typAkce
http://linked.open.../riv/zahajeniAkce
http://linked.open...n/vavai/riv/zamer
number of pages
http://purl.org/ne...btex#hasPublisher
  • TU-Sofia
https://schema.org/isbn
  • 95-443-8517-7
http://localhost/t...ganizacniJednotka
  • 26220
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