17. A system comprising: a gender-specific speaker adaptation module, configured to select a gender-specific speaker adaptation technique based on characteristics of a first unit of input speech, wherein the gender-specific speaker adaptation technique relates to a particular gender; a speaker-dependent speaker-adaptation module, configured to select a speaker-dependent speaker adaptation technique based on characteristics of a second unit of speech, wherein the speaker-dependent speaker adaptation technique relates to a particular speaker of the particular gender; and a pattern classification module, configured to (i) transcribe the second unit of speech into text based on the gender-specific speaker adaptation technique, and (ii) transcribe a third unit of speech into text based on the speaker-dependent speaker adaptation technique, wherein the second unit of speech is transcribed into text while selecting the speaker-dependent speaker adaptation technique.
17. A system comprising: a gender-specific speaker adaptation module, configured to select a gender-specific speaker adaptation technique based on characteristics of a first unit of input speech, wherein the gender-specific speaker adaptation technique relates to a particular gender; a speaker-dependent speaker-adaptation module, configured to select a speaker-dependent speaker adaptation technique based on characteristics of a second unit of speech, wherein the speaker-dependent speaker adaptation technique relates to a particular speaker of the particular gender; and a pattern classification module, configured to (i) transcribe the second unit of speech into text based on the gender-specific speaker adaptation technique, and (ii) transcribe a third unit of speech into text based on the speaker-dependent speaker adaptation technique, wherein the second unit of speech is transcribed into text while selecting the speaker-dependent speaker adaptation technique. 19. The system of claim 17 , wherein selecting the speaker-dependent speaker adaptation technique based on characteristics of the second unit of input speech comprises determining that the characteristics of the second unit of input speech fit a speaker-dependent speech model associated with the speaker-dependent speaker adaptation technique better than the characteristics of the second unit of input speech fit one or more additional speaker-dependent speech models.