Although this method is regarded as a refined version of the VQ distortion based recognition method proposed by Burton et al, it is also considered as a special case of a mixed distribution density HMM.

• 这种方法被看作是由 Burton等人提出识别方法的 VQ-误差的一种改进型 ,但也被认为是混合的分散密度 HMM的一种特殊情况。