Text-to-speech synthesis system
Patent 4685135 Issued on August 4, 1987. Estimated Expiration Date: 
August 4, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
August 4, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3632887 3704345 Voice synthesizer Speech synthesis integrated circuit device Method of and device for synthesis of speech from printed text Manually controllable data reading apparatus for speech synthesizers Patent #: 4337375 InventorsAssigneeApplicationNo. 06/240694 filed on 03/05/1981US Classes:704/260Image to speechExaminersPrimary: Kemeny, E. S.Attorney, Agent or FirmAbstractA text-to-speech synthesis system receives digital code representative of characters from a local or remote source, and converts those character codes into speech. A set of allophone rules is contained in a memory and each incoming character set is matched with the proper character set to describe the sound of that particular character set. A microcontroller is dedicated to the comparison procedure which provides allophonic code when a match is made. The allophonic code is provided to a speech producing system which has a system microcontroller for controlling the retrieval, from a read-only memory, of digital signals representative of the individual allophone parameters. The addresses at which such allophone parameters are located are directly related to the allophonic code. A dedicated microcontroller concatenates the digital signals representative of the allophone parameters, including code indicating stress and intonation patterns for the allophones. An LPC speech synthesizer receives the digital signals and provides analog signals corresponding thereto to a loud speaker to produce speech-like sounds with stress and intonation.Other References
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