23. The invention as set forth in claim 17, wherein the minimum total cost is a number of bits required to represent each data set.
23. The invention as set forth in claim 17, wherein the minimum total cost is a number of bits required to represent each data set. 24. The invention as set forth in claim 23, wherein the total cost is a total encoding cost of each decoding context associated with each data set plus the cost of representing codebooks for each of decoding context.