Consequences
Quality of picture depends on both efficiency of encoding and ‘thoroughness’ of decoding
Poorer systems will coarsen vector quantization, drop delta frames, reduce searches among macroblocks
There will be compromises of definition vs. fluency
There will be compromises in synchronisation
At full CIF 15 fps seems the maximum achievable; 10-12 fps is more realistic. At QCIF, 25 more likely than 30 fps