Girish Mahajan (Editor)

Filter (video)

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A video filter is a software component that is used to decode audio and video. Multiple filters can be used in a filter chain, in which each filter receives input from its previous-in-line filter upstream, processes the input and outputs the processed video to its next-in-line filter downstream. Such a configuration can be visualized in a filter graph.

Contents

With regards to video encoding three categories of filters can be distinguished:

  • prefilters: used before encoding
  • intrafilters: used while encoding (and are thus an integral part of a video codec)
  • postfilters: used after decoding

    • Prefilters

    Common prefilters include:

  • denoising
  • resizing (upsampling, downsampling)
  • contrast enhancement
  • deinterlacing (used to convert interlaced video to progressive video)
  • deflicking

    • Intrafilters

    Common intrafilters include:

  • deblocking

    • Postfilters

    Common postfilters include:

  • deinterlacing
  • deblocking
  • deringing

    • References

    Filter (video) Wikipedia
    (Text) CC BY-SA