Speech Recognition by Machine
Over the past several decades, the need has arisen to enable humans to communicate with machines in order to control their actions or obtain information. Initial attempts at providing human-machine communications led to the development of the keyboard, the mouse, the trackball, the touch screen, and the joy stick. However, none of these communication devices provides the richness or the ease of use of speech which has been the most natural form of communication between humans for tens of centuries. This need of a natural voice interface between humans andmachines has beenmet, to a limited extent, by speechprocessing systems which enable a machine to speak (speech synthesis systems) and which enable a machine to understand (speech recognition systems) human speech. We concentrate on speech recognition systems in this section.