Compression Artifacts in Modern Video Coding and State-of-the-Art Means of Compensation

Compression Artifacts in Modern Video Coding and State-of-the-Art Means of Compensation

Andreas Unterweger (University of Salzburg, Austria)
Copyright: © 2013 |Pages: 22
DOI: 10.4018/978-1-4666-2660-7.ch002
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Abstract

This chapter describes and explains common as well as less common distortions in modern video coding, ranging from artifacts appearing in MPEG-2 Video, MPEG-4 Part 2, H.264, and VC-1 to scalable and multi-view video coding based distortions, including the proposals for next generation video coding (NVC). In addition to a discussion about avoiding these artifacts through encoder-side measures, a state-of-the-art overview of their compensation at the decoder side is given. Finally, artifacts emerging from new sophisticated coding tools in current and upcoming video coding standards are discussed.
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Background

The origins of artifacts in block based transform video coding are, in most cases, directly or indirectly related to quantization errors in the transform domain, which are inevitable when lossily compressing images or sequences thereof. Since the first coding standards of this kind, e.g. JPEG for still image coding and H.261 for video coding, various related visual artifacts have been discussed throughout the literature.

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