15. The computing device of claim 14 , wherein the feature-space speaker adaptation parameters include a first diagonal matrix, wherein updating the feature vectors based on the feature-space speaker adaptation parameters comprises applying the first diagonal matrix to the feature vectors, wherein the updated feature-space speaker adaptation parameters include a second diagonal matrix, and wherein the ASR module is further configured to apply the second diagonal matrix to a first subsequently-received feature vector.
15. The computing device of claim 14 , wherein the feature-space speaker adaptation parameters include a first diagonal matrix, wherein updating the feature vectors based on the feature-space speaker adaptation parameters comprises applying the first diagonal matrix to the feature vectors, wherein the updated feature-space speaker adaptation parameters include a second diagonal matrix, and wherein the ASR module is further configured to apply the second diagonal matrix to a first subsequently-received feature vector. 16. The computing device of claim 15 , wherein the new feature-space speaker adaptation parameters include a first non-diagonal matrix, and wherein replacing the updated feature-space speaker adaptation parameters with the new feature-space speaker adaptation parameters comprises replacing the second diagonal matrix with the first non-diagonal matrix.