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What are the tell-tale MPEG artifacts?

April 26, 2017artifacts MPEG tell-tale

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What are the tell-tale MPEG artifacts?

2 Answers

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A. If the encoder did its job properly, and the user specified a proper balance between sample rate and bitrate, there shouldn’t be any visible artifacts. However, in sub-optimal systems, you can look for: Gibbs phenomenon/Ringing/Aliasing (too few AC bits, not enough pre-processing) Blockiness (not considering your neighbors before quantizing) Posterization (too few DC bits) Checkerboards (DCT eigenimages as a result of too few AC coefficients) Colorbleeding (not considering color in encoder cost model, not subtracting color at edges of objects, etc.

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A. If the encoder did its job properly, and the user specified a proper balance between sample rate and bitrate, there shouldn’t be any visible artifacts.