Data processing: speech signal processing – linguistics – language – Speech signal processing – Synthesis
Patent
1997-03-07
1999-03-30
Hudspeth, David R.
Data processing: speech signal processing, linguistics, language
Speech signal processing
Synthesis
G10L 502, G10L 900
Patent
active
058901159
ABSTRACT:
A wavetable speech synthesis apparatus includes a wavetable memory for defining a plurality of primitive speech sounds. The primitive speech elements are individually assigned to a memory cell designated by an instrument identification in the wavetable memory. Various primitive speech elements are defined and selected from among sound bites, entire words and phrases, frequently-occurring syllables, phonemes or smaller atomic speech elements. The primitive speech elements generate primitive sounds that are played back at a selected pitch, duration, attack velocity and envelope, sustain, and decay velocity and envelope. Various types of speaker qualities or identities are assigned to different frequency ranges of the speech elements. The wavetable memory includes a speech sample database and a speech reference database. The speech sample database supplies speech signals that are processed by the wavetable synthesizer according to information contained in the speech reference database. Reference information in the speech reference database includes various dictionaries, context lists, algorithms, and heuristic rules for guiding decisions relating to selection of primitive speech element, duration, volume and other parameters. The dictionaries store of sampled words and phonics and an encoding designating the pronunciation of the words and phonics. The context lists encode emphasis, lift and emotion that are expressed using variations in volume and addition of vibrato and tremolo.
REFERENCES:
patent: 5228087 (1993-07-01), Bickerton
patent: 5278943 (1994-01-01), Gasper
patent: 5444818 (1995-08-01), Lisle
patent: 5457685 (1995-10-01), Champion
Webster's II New Riverside University Dictionary, Def. of "vibrato" and tremolo, Dec. 1994.
Advanced Micro Devices , Inc.
Hudspeth David R.
Koestner Ken J.
Sax Robert Louis
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