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Originally Posted by heyman421 I wouldn't have said it if i hadn't seen it with my own eyes.
Compression visibly deteriorates the source. |
The foundation of lossy visual/audio is based on human perceptions and this in itself varies between individual humans. The graphs are no use for showing if a certain human will be able to differentiate between source & lossy copy, just look at the debate about MPEG-2 reduction methods for an illustration of this fact or 128kb MP3 audio compared to higher bitrate MP3 or other lossy audio formats.