ES2107635T3

Noise reduction method in a speech signal

Abstract

ACCORDING TO THE INVENTION, THE PROCESS CONSISTS OF: CYCLICALLY CONVERTING BY TRANSFORMING OF FOURIER DIGITAL SIGNALS, WHICH RESULT FROM THE ANALOGICAL-DIGITAL CONVERSIONS OF SIGNALS ISSUED BY TWO REMOTE MICROPHONES, AND THEY ARE RECEIVED BY SIX DISTANCES, AND THEY ARE RECEIVED BY SIX DISTANCES, AND THEY ARE RECEIVED BY SUCH DIVERSE, AND THEY ARE SIGNALED, BEING REPRESENTATIVE EACH DATA DISCRETE OF SUCH SERIES OF ENERGY AND OF THE PHASE OF A FREQUENCY CHANNEL OF THE SPECTRUM OF SUCH SOUND SIGNAL; DETERMINE THE DOMINANT ARRIVAL ANGLE OF SUCH SOUND SIGNAL FROM THE PHASE DIFFERENCES BETWEEN THE DISCRETE DATA THAT CORRESPOND TO THE SAME FREQUENCY CHANNELS CORRESPONDING TO SUCH ANGLE OF DOMINANT ARRIVAL OF THE ANGLE OF LLEGADA, FROM THE ANGLE OF SEAGRAH; GET AN INSTANT SPECTRUM OF SUCH SOUND SIGNAL: UPDATE A NOISE SPECTRUM COMPARING, FOR EVERY SIGNAL OF FREQUENCY OF SUCH INSTANT SPECTRUM, THE ABSOLUTE VALUE OF THE DIFFERENCE BETWEEN SUCH A DOMINANT ARRIVAL ANGLE OF CONSIDERED FREQUENCY, WITH AN UMBRAL VALUE, BEING UPDATED THE ENERGIES OF SUCH FREQUENCY CHANNELS OF SUCH NOISE SPECTRUM THROUGH ENERGIES OF THE FREQUENCY CHANNELS OF SUCH INSTANT SPECTRUM WHOSE ABSOLUTE VALUE OF THE DIFFERENCE BETWEEN SINGLE ANGLE OF ARRIVAL OF ARRIVAL AND THE ANGLE OF ARRIVALS SUPERIOR TO SUCH VALUE OF THRESHOLD OF TOLERANCE; SUBMIT SUCH NOISE SPECTRUM UPDATED OF SUCH INSTANT SPECTRUM TO OBTAIN A SPECTRUM OF SUCH WORD SIGNAL.

ES2107635T3, drawing sheet 1
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Term

Term ended

Projected expiry passed 11 February 2013, 13.6 years ago.

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