2. The method of claim 1 wherein: using the maximum a posteriori probability process includes restricting estimation of statistical changes such that an amount of acoustic parameters from the baseline acoustic speech model that have an estimated statistical change is less than a total number of acoustic parameters included in the baseline acoustic speech model, further comprising storing the changes as acoustic parameter adaptation data linked to the first speaker.
2. The method of claim 1 wherein: using the maximum a posteriori probability process includes restricting estimation of statistical changes such that an amount of acoustic parameters from the baseline acoustic speech model that have an estimated statistical change is less than a total number of acoustic parameters included in the baseline acoustic speech model, further comprising storing the changes as acoustic parameter adaptation data linked to the first speaker. 4. The computer-implemented method of claim 2 , wherein restricting estimation of statistical changes includes imposing a penalty on movement of exponential family variables when calculating statistical change.