Abstract
This paper describes an experimental system with speech input and output providing a problem domain for speech analysis and synthesis research. Speech input to the computer is provided using a system developed at Stanford (Reddy and Vicens, “Spoken Message Recognition by a Computer,” to be published). Time-domain compressed speech [D. R. Reddy, J. Acoust. Soc. Amer. 44, 391(A) (1968)] is used for voice response from the computer. If a query is not one of the 25 or so messages the system can recognize, it responds with “Please repeat,” or some such. If the input is recognized, then the response is a random but relevant message chosen from about 100 messages. This system was developed not so much to talk to machines but rather to study some aspects of man-machine voice communication such as the effect of (a) a delayed reply on a human speaker, (b) intonationless speech that can result from concatenating isolated words to form a sentence, (c) the increase of vocabulary on computer speed and storage requirements, and (d) improvements to the analysis or synthesis algorithms on the over-all performance of the system.
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