Speech segment coding and pitch control methods for speech synthesis systems
Patent 5617507 Issued on April 1, 1997. Estimated Expiration Date: 
July 14, 2014. 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.
July 14, 2014. 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 3700815 Speech encoding process combining written and spoken message codes Method and apparatus for encoding speech Patent #: 4914701 InventorsAssigneeApplicationNo. 275940 filed on 07/14/1994US Classes:704/200, SPEECH SIGNAL PROCESSING704/500, AUDIO SIGNAL BANDWIDTH COMPRESSION OR EXPANSION704/503AUDIO SIGNAL TIME COMPRESSION OR EXPANSION (E.G., RUN LENGTH CODING)ExaminersPrimary: MacDonald, Allen R.Assistant: Chowdhury, Indranil Attorney, Agent or FirmInternational ClassesG01L 001/06G06F 015/00 Foreign Application Priority Data1991-11-06 KRAbstractThe present invention relates to a method and system for synthesizing speech utilizing a periodic waveform decomposition and relocation coding scheme. According to the scheme, signals of voiced sound interval among original speech are decomposed into wavelets, each of which corresponds to a speech waveform for one period made by each glottal pulse. These wavelets are respectively coded and stored. The wavelets nearest to the positions where the wavelets are to be located are selected from stored wavelets and decoded. The decoded wavelets are superposed to each other such that original sound quality can be maintained and duration and pitch frequency of speech segment can be controlled arbitrarily.Other References
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