Method for characterizing a sound signal
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Abstract
The invention concerns a method for characterizing in accordance with specific parameters, a sound signal x(t) varying in time t in different frequency bands k, and referenced x(k, t). It consists in storing the signal x(t), calculating and storing the energy E(k, t) of said signal x(k, t) for each of said bands k, k varying from 1 to K and in accordance with a time window h(t) of duration 2N, and in a second step, calculating the energy variation and the signal phase E(k, t) in J frequency bands, the J values referenced F(j, k, t) and φ(j, k, t) thus obtained constituting the specific parameters of an extract of duration 2N of the sound signal x(t) and in repeating said calculation at every S time interval.
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Citations
15 Claims
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1-8. -8. (canceled)
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9. A method for characterizing, according to specific parameters, a sound signal x(t) evolving over the time t during a duration D into different bands of frequencies k and then recorded x(k, t), comprising:
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storing the signal x(t), calculating and storing the energy E(k, t) of said signal x(k, t) for each of said bands of frequencies k, k varying from 1 to K and according a temporal window h(t) of a duration of 2N, calculating and storing the energy F(k, j, t) and the related phase φ
(j, k, t) of E(k, t) for the bands of frequencies j, j varying from 1 to J,using a temporal window h′
(t) of a duration of 2N′
, the J×
K values of the energy F(j, k, t) and of the related phase φ
(j, k, t) thus obtained constituting the specific parameters of an extract of a duration of 2N′
of the sound signal x(t), andreiterating said calculation at regular intervals in order to obtain the universe of the specific parameters for the duration D of the sound signal x(t). - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification