7. Apparatus as claimed in claim 6 further comprising: means for converting said values in said plurality of reference templates and said values in said bias template to logarithmic.
6. Apparatus as claimed in claim 5 wherein said second score establishing means includes: means for selecting for each position of the expanded bias templates either the output from said first expanded bias template if the corresponding position in the utterance template contains a binary one or the output from said second expanded bias template if the corresponding position in the utterance template contains a binary zero for scoring the bias template.