 The finer the precision of the MVs, the more accurate the match is likely to be, and the more efficient the compression.There are trade-offs to higher precision, however.Finer MV precision results in using a larger amount of data to represent the MV, as larger numbers must be stored in the frame for every single MV, increased coding complexity as increasing levels of interpolation on the macroblock are required for both the encoder and decoder, and diminishing returns (minimal gains) with higher precision MVs.