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Description
  • Příspěvek pojednává o vlastnostech komprimační metody 3D DCT. V průběhu komprimace video signálů použitím 3D DCT jsou vstupní data transformovány na frekvenční koeficienty, čímž dojde k odstranění vzájemné korelace jednak mezi sousedními body, ale také mezi sousedními snímky. Aplikováním následujících operací, jakým je kvantování a prahování je počet nenulových 3D DCT koeficientů redukován. Situace se zkomplikuje v případě, že množina kódovaných snímků obsahuje střih. Pak lze v dekódované sekvenci pozorrovat vzájemné prolínání obsahu dílčích sekvencí. V textu příspěvku je navržena metoda, jak odstranit toto rušivé prolínání. (cs)
  • This paper deals with the properties of a compression method based on the 3D DCT. During the video compression process with 3D DCT the image data are transformed into frequency domain and the cross-correlation between adjacent pixels and even between frames is being removed without any quality loss. By implementing the quantization and thresholding operations, the number of 3D DCT coefficients is reducing. The situation is even worse while a group of encoded frames contains several types of video sequennces, i.e. the cut is presents. In decompressed sequence the disturbing cross-fade effect is perceptible. In the next text a method for removing this effect based on the 3D DCT coder modifications is described.
  • This paper deals with the properties of a compression method based on the 3D DCT. During the video compression process with 3D DCT the image data are transformed into frequency domain and the cross-correlation between adjacent pixels and even between frames is being removed without any quality loss. By implementing the quantization and thresholding operations, the number of 3D DCT coefficients is reducing. The situation is even worse while a group of encoded frames contains several types of video sequennces, i.e. the cut is presents. In decompressed sequence the disturbing cross-fade effect is perceptible. In the next text a method for removing this effect based on the 3D DCT coder modifications is described. (en)
Title
  • Improving Quality of Video Signals Encoded by 3D DCT Transform
  • Zlepšení kvality video sekvencí kódovaných pomocí 3D DCT (cs)
  • Improving Quality of Video Signals Encoded by 3D DCT Transform (en)
skos:prefLabel
  • Improving Quality of Video Signals Encoded by 3D DCT Transform
  • Zlepšení kvality video sekvencí kódovaných pomocí 3D DCT (cs)
  • Improving Quality of Video Signals Encoded by 3D DCT Transform (en)
skos:notation
  • RIV/00216305:26220/06:PU57570!RIV06-MSM-26220___
http://linked.open.../vavai/riv/strany
  • 89-93
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  • Z(MSM0021630513)
http://linked.open...vai/riv/dodaniDat
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http://linked.open...iv/duvernostUdaju
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  • 479093
http://linked.open...ai/riv/idVysledku
  • RIV/00216305:26220/06:PU57570
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  • Compression, video signal, 3D DCT, cross-fade effect elimination, improving quality (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...ontrolniKodProRIV
  • [98256CA36175]
http://linked.open...v/mistoKonaniAkce
  • Zadar
http://linked.open...i/riv/mistoVydani
  • Zadar, Croatia
http://linked.open...i/riv/nazevZdroje
  • Proceedings ELMAR-2006
http://linked.open...in/vavai/riv/obor
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  • Frýza, Tomáš
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http://linked.open...n/vavai/riv/zamer
number of pages
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  • Croatian Society Electronics in Marine
https://schema.org/isbn
  • 95-370-4403-3
http://localhost/t...ganizacniJednotka
  • 26220
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