According to Total Voice Technologies web site, “Harpy” developed by Carnegie Mellon was able to comprehend 1011 words. Department of Defense supported speech recognition technology from 1971 to 1976 with the development of DARPA SUR ‘s (Speech Understanding Research) program. There were several breakthroughs in the Speech to Text technology. Speech to Text Technology grew throughout the 1970s through the 1990’s There were also parallel advancements in technology such as the development of a device by Bell Laboratories that could understand more than one person’s voice. It employed a more efficient system of searching for logical sentences. As a result, ‘ Harpy’ was developed by Carnegie Mellon which had the ability to comprehend 1011 words. Department of Defense contributed heavily towards the development of speech recognition systems and from 1971 to 1976, it funded the DARPA SUR (Speech Understanding Research) program. Later, voice recognition was enhanced to comprehend 9 consonants and 4 vowels. But in 1962, the ‘shoebox’ technology was able to understand 16 words in English.
In 1952, ‘ Audrey’ was invented by Bell Laboratories which could only understand numbers.
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In the history of speech recognition software technology, this was the era of ‘baby talk’ only numbers and digits could be comprehended. According to the Voder “could create 20 or so different buzzes and chirps, which the operator could manipulate using 10 keys, a wrist plate, and a pedal.” The speech-to-text-, the first electronic device that could generate continuous human speech electronically became the first text to speech device.Īlthough, not as efficient as our present-day text to speech the Voder was audible.
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