SPEECH CONTROLLED PHONETIC TYPEWRITER OR DISPLAY DEVICE USING TWO TIER APPROACH

摘要

Abstract of the DisclosureA speech-controlled phonetic deviceutilizes a two-tier approach for converting anaudio input into visual form. The device basicallycomprises: various components for identifyingdifferent phonemes, such as a sound separator,various sensors and transducers, a vowel scanner,a vowel transducer, and a diphthong transducer;an input synchronizer; a transcriber processor;and a printer or display device. The two-tierapproach involves a first tier, wherein the identi-fied speech sounds are broken down into syllabits(groupings of classes of sound), the spoken se-quence of those syllabits is separated into possi-ble words, and the grouping of the syllabits isindicated. The second tier involves the use ofstored words with those respective groupings,but narrowed down to essential phonemes only.Thus, the second tier acts to eliminate, fromsuch possible words, all except a specific word(the actually spoken word), which contains eachof the detected phonemes in the proper sequence.Further features of the invention include an im-proved vowel identification circuit using bothformant peak detection and envelope detection- comparison techniques, and the use of an inputsynchronizer to provide phoneme identifiers tothe transcriber processor.