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In electrical engineering and computer science, video processing is a particular case of signal processing, where the input and output signals are video files or video streams. Video processing techniques are used in television sets, VCRs, DVDs, video codecs, video players and other devices. For example—commonly only design and video processing is different in TV sets of different manufactures[citation needed].
In terms of video codecs video filters are divided into three parts:
- Prefilters: used before encoding
- Intrafilters: inside of codec
- Postfilters: used after decoding
Common prefilters are following:
- Video denoising,
- Size conversion (commonly downsampling)
- Contrast enhancement
- Deinterlacing
- Deflicking, etc.
As intrafilter in current standards only deblocking is used.
Common postfilters are following:
- Deinterlacing (to convert interlaced video to progressively scanned)
- Deblocking
- Deringing
See also
References
- Bovik, Al (ed.). Handbook of Image and Video Processing. San Diego: Academic Press, 2000. ISBN 0121197905.
- Wang, Yao, Jörn Ostermann, and Ya-Qin Zhang. Video Processing and Communications. Signal Processing Series. Upper Saddle River, N.J.: Prentice Hall, 2002. ISBN 0130175471.
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