 The corresponding image degradation manifests itself in reduced resolution, increased noise and compression artifacts.For example, KPBS broadcasts four multiplexes on a single physical channel, two of which are HD.In Europe, transports are used on CODFM 64-QAM/256-QAM modulated DVB-T and DVB-T2 ("T" for terrestrial) digital terrestrial standards, on CODFM 256-QAM modulated DVB-C digital cable and on CODFM QPSK/8PSK modulated DVB-S digital satellite.