Decades: 290s BC 280s BC 270s BC 260s BC 250s BC - 240s BC - 230s BC 220s BC 210s BC 200s BC 190s BC
Years: 254 BC 253 BC 252 BC 251 BC 250 BC - 249 BC - 248 BC 247 BC 246 BC 245 BC 244 BC
... compression. There, the two-dimensional DCT-II of 8x8 blocks is computed and the results are filtered to discard small (difficult-to-see) components. That is, n is 8 ...
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