Method and apparatus for phase synthesis for speech processing
First Claim
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1. A method for synthesizing speech, wherein the harmonic phase signal Θ
-
k (t) in voiced speech is synthesized by the method comprising the steps ofenabling receiving voice/unvoiced information Vk (t) and fundamental angular frequency information ω
(t),enabling processing Vk (t) and ω
(t), generating intermediate phase information φ
k (t), and obtaining a random component rk (t), andenabling synthesizing Θ
k (t) of voiced speech by combining φ
k (t) and rk (t).
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Abstract
A class of methods and related technology for determining the phase of each harmonic from the fundamental frequency of voiced speech. Applications of this invention include, but are not limited to, speech coding, speech enhancement, and time scale modification of speech. Features of the invention include recreating phase signals from fundamental frequency and voiced/unvoiced information, and adding a random component to the recreated phase signal to improve the quality of the synthesized speech.
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22 Claims
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1. A method for synthesizing speech, wherein the harmonic phase signal Θ
-
k (t) in voiced speech is synthesized by the method comprising the steps of
enabling receiving voice/unvoiced information Vk (t) and fundamental angular frequency information ω
(t),enabling processing Vk (t) and ω
(t), generating intermediate phase information φ
k (t), and obtaining a random component rk (t), andenabling synthesizing Θ
k (t) of voiced speech by combining φ
k (t) and rk (t). - View Dependent Claims (2, 3, 4, 5)
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k (t) in voiced speech is synthesized by the method comprising the steps of
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6. An apparatus for synthesizing speech, wherein the harmonic phase signal Θ
-
k (t) in voiced speech is synthesized, said apparatus comprising
means for receiving voiced/unvoiced information Vk (t) and fundamental angular frequency information ω
(t)means for processing Vk (t) and ω
(t) and generating intermediate phase information φ
k (t),means for obtaining a random phase component rk (t), and means for synthesizing Θ
k (t) of voiced speech by addition of rk (t) to φ
k (t). - View Dependent Claims (7, 8, 9, 10)
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k (t) in voiced speech is synthesized, said apparatus comprising
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11. An apparatus for synthesizing speech from digitized speech information, comprising
an analyzer for generation of a sequence of voice/unvoiced information, Vk (t), fundamental angular frequency information ω - (t), and harmonic magnitude information signal Ak (t), over a sequence of times t0 . . . tn,
a phase synthesizer for generating a sequence t0 . . . tn based upon corresponding ones of voiced/unvoiced information Vk (t) and fundamental angular frequency information ω
(t), anda synthesizer for synthesizing voiced speech based upon the generated parameters Vk (t), ω
(t), Ak (t), and Θ
k (t) over the sequence t0 . . . tn. - View Dependent Claims (12, 13, 14, 15, 16)
- (t), and harmonic magnitude information signal Ak (t), over a sequence of times t0 . . . tn,
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17. A method for synthesizing speech from digitized speech information, comprising the steps of
enabling analyzing digitized speech information and generating a sequence of voiced/unvoiced information signals Vk (t), fundamental angular frequency information signals ω - (t), and harmonic magnitude information signals Ak (t), over a sequence of times t0 . . . tn,
enabling synthesizing a sequence of harmonic phase signals Θ
k (t) over the time sequence t0 . . . tn based upon corresponding ones of voiced/unvoiced information signals Vk (t) and fundamental angular frequency information signals ω
(t), andenabling synthesizing voiced speech based upon the parameters Vk (t), ω
(t), Ak (t), and Θ
k (t) over the sequence t0 . . . tn. - View Dependent Claims (18, 19, 20, 21, 22)
- (t), and harmonic magnitude information signals Ak (t), over a sequence of times t0 . . . tn,
Specification