13. How are the speech recognition systems used in other devices, such as cell phones, different from those used in basic personal computers?
The biggest difference is that cell phones contain a separate digital signal processor (DSP) chip just to handle the initial speech conversion. The chip makes them considerably faster and more accurate. A second major difference is that the systems need relatively little training. However, they need to recognize only a few short names or phrases for dialing. Similar systems are in commercial use for recognizing voice responses on telephone systems. Their strength is the ability to handle accents relatively well, but they work by using a relatively small set of words.