Soongsil University

C & S Technology Co., Ltd.

Myung Jin Bae

Sang Gil Lee

Geum Ran Baek

Seong Geon Bae

Seong Hoon Hong

Yoo Na Sung

Min Kyu Shim

Jeong Jin Kim

Kyung A Jang

An alcohol consumption determination method includes detecting a plurality of effective frames of an input voice signal; detecting a difference in signal of within the original signal of each of the effective frames; detecting average energy of the original signal and average energy of the difference signal for each of the effective frames; and determining whether alcohol has been consumed based on a difference between the average energy of the original signal and the average energy of the difference between the signals for each effective frame. Accordingly, it is also possible to determine, from a remote location, whether a driver or an operator remote has consumed alcohol and the degree of inebriation by using a difference signal energy method using a voice signal, thus preventing an accident caused by a operation vehicles and machines under the influence of alcohol.

Method for judgment of drinking using differential energy in time domain, recording medium and device for performing the method

Disclosed are a method for determining whether a person is drunk after consuming alcohol capable of analyzing alcohol consumption in a time domain by analyzing a voice, and a recording medium and a terminal for carrying out same. An alcohol consumption-determining terminal comprises: a voice input unit for generating a voice frame by converting an inputted voice signal and outputting the voice frame; a voiced/unvoiced sound analysis unit for determining whether the voice frame inputted through the voice input unit corresponds to a voiced sound, an unvoiced sound, or background noise; a voice frame energy detection unit for extracting the average energy of voice frames which have been determined as a voiced sound by the voiced/unvoiced sound analysis unit; an interval energy detection unit for detecting the average energy of intervals including a plurality of voice frames which have been determined as voiced sounds; and an alcohol consumption determining unit for determining whether a person is drunk after consuming alcohol by extracting a difference value among the average energy of neighboring intervals which have been detected by the interval energy detection unit, thereby determining whether a person is drunk after consuming alcohol by analyzing the voice signal in a time domain.

Method for determining alcohol consumption, and recording medium and terminal for carrying out same

Disclosed are a method for determining whether a person is drunk after consuming alcohol on the basis of a difference among a plurality of formant energy energies, which are generated by applying linear predictive coding according to a plurality of linear prediction orders, and a recording medium and a terminal for carrying out the method. The alcohol consumption determining terminal comprises: a voice input unit for receiving voice signals and converting same into voice frames and outputting the voice frames; a voiced/unvoiced sound analysis unit for extracting voice frames corresponding to a voiced sound from among the voice frames; an LPC processing unit for calculating a plurality of formant energy energies by applying linear predictive cording according to the plurality of linear prediction orders to the voice frames corresponding to the voiced sound; and an alcohol consumption determining unit for determining whether a person is drunk after consuming alcohol on the basis of a difference among the plurality of formant energy energies which have been calculated by the LPC processing unit, thereby determining whether a person is drunk after consuming alcohol depending on a change in the formant energy energies generated by applying linear predictive coding according to the plurality of linear prediction orders to voice signals.

This method for determining alcohol use comprises the steps of: detecting an effective frame in an input audio signal; detecting a difference in signal within the original signal of the effective frame; performing a fast Fourier conversion on the difference signal to be transformed into a frequency domain; detecting high-frequency components within the difference signal subjected to the fast Fourier transform; and determining the state of alcohol use on the basis of a gradient difference between the high-frequency components. Accordingly, the present invention can identify the state and extent of alcohol use by a driver or an operator from a long distance and thus can prevent accidents caused by driving or operating vehicles and machines under the influence of alcohol.

Method for determining alcohol use by comparison of high-frequency signals in difference signal, and recording medium and device for implementing same

An alcohol consumption determination method includes: detecting an effective frame of an input voice signal; detecting a difference signal of an original signal of the effective frame; performing fast Fourier conversion on the original signal and the difference signal; and determining, in the frequency domain, whether alcohol has been consumed based on a slope difference between the fast-Fourier-transformed original signal and the fast-Fourier-transformed difference signal. Accordingly, it is also possible to determine whether a driver or an operator from a remote location has consumed alcohol and a degree of the consumption, thus preventing an accident caused by an individual operating a vehicle under the influence.

Method for judgment of drinking using differential frequency energy, recording medium and device for performing the method

Disclosed is a method for determining alcohol consumption capable of analyzing alcohol consumption in a time domain by analyzing a formant slope of a voice signal, and a recording medium and a terminal for carrying out same. An terminal for determining whether a person is drunk comprises: a voice input unit for generating a voice frame by receiving a voice signal; a voiced/unvoiced sound analysis unit for determining whether a received voiced frame corresponds to a voiced sound; a formant frequency extraction unit for extracting a plurality of formant frequencies of the voice frame corresponding to the voiced sound; and an alcohol consumption determining unit for calculating a formant slope between the plurality of formant frequencies, and determining the state of alcohol consumption depending on the formant slope, thereby determining whether a person is drunk by analyzing the formant slope of an inputted voice.

A method of searching an MP-MLQ fixed codebook through bit predetermination includes the steps of generating a target vector with amplitude, reducing time to search an optimal pulse array through the bit predetermination and searching all of pulses if two errors have an identical value.

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Seoul, South Korea

Myung Jin Bae