2. HD quality and measurements
2.1 Origin and types of defects in HD images
Possible faults may arise from :
From the source, linked to internal source processing :
pre-filtering, which can reduce resolution by reducing the amount of detail;
compression, which can give rise to artefacts linked to too high a rate (blurring and block effect) or the concatenation of different compression formats (INTRA, INTER...);
decimation (deletion of measurement results) in both luminance and chrominance, e.g. from 4:4:4 to 4:2:2 or 3:1:1;
interlacing linked to changes from interlaced to progressive scan structures;
intrinsic film defects...
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HD quality and measurements
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