An apparatus for recording speech for subsequent generation of a text includes an acoustic input (M) and an acoustic output (L) for inputting and outputting analog speech respectively. An analog-to-digital/digital-to-analog (AD/DA) converter converts the inputted...http://www.google.com.hk/patents/US5809464?utm_source=gb-gplus-share專利 US5809464 - Apparatus for recording speech for subsequent text generation
