PATENT CLAIM ANALYSIS

Application Number: 15745307
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2019-01
Patent Classification: ["704", "258000"]

Abstract:
This invention discloses a speech analysis/synthesis method and a simplified form of such a method. Based on a harmonic model, the present method decomposes the parameters of the harmonic model into glottal source characteristics and vocal tract characteristics in its analysis stage and recombines the glottal source and vocal tract characteristics into harmonic model parameters in its synthesis stage.

Claim (Index 1):
A speech analysis method based on a harmonic model, the speech analysis method comprising:\n a) decomposing parameters of the harmonic model into a glottal source component and a vocal tract component, the glottal source component comprising parameters of a glottal flow model and phase difference corresponding to each harmonic, performing harmonic analysis on an input speech signal and obtaining a fundamental frequency, an amplitude and phase vectors of the harmonics at each analysis instant; b) estimating the glottal source characteristics from the input speech at each analysis instant, obtaining the parameters of the glottal flow model, and computing the glottal source frequency response from the parameters of the glottal flow model, including a magnitude response and a model-derived phase response of the glottal flow model; c) deviding a harmonic amplitude vector by the glottal flow magnitude response, obtaining a vocal tract magnitude response; d) computing a vocal tract phase response from the vocal tract magnitude response by using homomorphic filtering based on the minimum-phase assumption; e) computing the glottal source frequency response comprising the phase vectors of the glottal source, obtaining the phase vector of the glottal source by subtracting the vocal tract phase response from the harmonic phase vector; and f) computing the difference between the phase vector of the glottal source harmonics obtained in step e and the model-derived glottal flow phase response obtained in step, obtaining a harmonic phase difference vector.

Metadata:
- Claim Count in Document: 3.0
- Percentile: 86.0
- Lexical Diversity: 1.82353
- Patent Class: 704.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['12061645', '13603226', '09475390', '12447519', '13017458']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.2501705861091554
- 35 USC 102 Novelty (BERT): 0.5008185035965301
- Combined Prediction Score: 0.2752353778578928
- Mean Citation Score: 244.04972400000003
- Max Citation Score: 262.1518
- Similarity Product: 206.6515236584663

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test