1. A method of providing speaker recognition comprising: receiving an identify claim via a receiving arrangement implemented in hardware; and employing an integrated circuit of a speech recognition system to: provide a target speaker model corresponding to a target speaker, the target speaker model being resolved hierarchically into at least one frame comprising a plurality of levels of phonetic detail of varying resolution; and ascertain whether the identity claim corresponds to the target speaker model; wherein to ascertain further comprises: determining, for each frame and each level of phonetic detail of the target speaker model, a likelihood value; and resolving the at least one likelihood value to obtain a likelihood score; wherein the likelihood values are determined utilizing grain-specific weights.