An efficient run-length encoding of binary sources with unknown statistics was discussed. Binary entropy coders, which were used in multimedia codec standards and used adaptive Golomb-Rice coders, were also discussed. The uses of two subsets of Golomb parameters were also proposed. Polynomials whose roots were used to determine the optimal values of the Golomb parameters were derived. A nearly-optimal adaption strategy was derived, using a maximum-liklihood approach. 534 Tanaka, H., Leon-Garcia, A., Efficient run-length encoding (1982) IEEE Trans. Information Theory, IT-28, pp. 880-890. , NovCosta, M.H.M., Malvar, H.S., Efficient run-length encoding of binary sources with unknown statistics (2003) Microsoft Research Tech. Report, TR-2003-95. , Dec