Abstract:
The present invention relates to an integrated tourism information providing device based on a voice user interface, and the integrated tourism information providing device according to the present invention evaluates the performance of a speech recognition function by measuring the word error rate in speech recognition, articulation of speech synthesis, and user satisfaction as well as comprehensively provides guidance on tour routes and adjacent tourist attractions as part of the coupling between the tourism sector and the ICT sector. According to the present invention, the mean word error rate can be reduced significantly, the mean accuracy in identifying pronunciations can be improved comparably, and useful information can be provided for a user based on a user satisfaction survey. [Reference numerals] (121) Geography database;(AA) Client;(BB) Network;(CC) Server;(DD) Tourist Attraction database
Abstract:
PURPOSE: A sound model compensation method which combines mask based multi-channel sound separation for marine sound is provided to analyze noise and voice properties, thereby improving performance of voice recognition. CONSTITUTION: A noise model and a weighted value necessary for sound model adaptation are obtained by using an HMM based mask. Mask information is estimated from a binaural signal. Noise is decreased by using the mask. After MMSS(Mask-based Multi-channel Source Separation) is performed, a 13th MFCC(Mel Frequency Cepstral Coefficient) is extracted from a voice signal.
Abstract:
본 발명은 대화형 음성 사용자 인터페이스 기반 육해상 통합관광정보 안내 시스템에 관한 것으로서, 본 발명에 따른 대화형 음성 사용자 인터페이스 기반 육해상 통합관광정보 안내 시스템은 해양 환경에서 대화형 음성 사용자 인터페이스의 입력 음성에 포함된 해상 잡음을 효과적으로 감쇄하며, 육해상 경로 통합 알고리즘을 포함하는 것을 특징으로 한다. 본 발명에 따르면, 해상 잡음에 강건한 대화형 음성 사용자 인터페이스를 이용하여 육해상 이동경로, 및 음성 관광 정보를 제공하는 시스템을 제안함으로써 다음의 효과를 얻을 수 있다. 첫째, 해상 잡음 감쇄 기술을 포함하는 대화형 음성 사용자 인터페이스를 통하여 선박 또는 해상 플랫폼 등의 해상 환경에서 사용자들이 신뢰성 있는 음성기반 상호작용을 통해 육해상 통합 관광정보를 취득할 수 있다. 둘째, 제안된 시스템의 육해상 경로 통합 알고리즘을 통해 새로운 육해상 통합 이동 경로의 DB를 구축할 필요 없이 기존의 육상 및 해상 경로 DB만으로 신뢰성 있는 육해상 통합 경로 정보를 제공할 수 있다.
Abstract:
PURPOSE: A method for efficiently reinforcing a voice signal based on a voice coding parameter in marine voice communications is provided to reinforce excitation signals among a bitstream parameter based on a voice encoding device in root environment, thereby supplying excellent performance. CONSTITUTION: An excitation signal gain ratio estimation unit(140) estimates an excitation signal gain ratio by using an excitation signal gain of background noises estimated by an excitation signal gain estimation block(130), and a decoding result which applies a fixed codebook gain by a fixed codebook vector decoding block(120). An excitation signal generation unit(150) generates an excitation signal by using a decoding result which applies an adaptive codebook gain by an excitation signal gain ratio estimation result and an adaptive codebook vector decoding block(110). [Reference numerals] (110,120) Adaptive codebook vector decoding; (130) Excitation signal gain estimation of background noise; (140) Excitation signal gain ratio estimation; (150) Excitation signal generation; (160) Linear prediction synthesis filter; (170) Postprocessor; (AA,BB) Input bit stream; (CC) Adaptive codebook gain application; (DD) Fixed codebook gain application; (EE) Enhanced voice signal; (FF) Near-end background noise estimation;
Abstract:
PURPOSE: A code division multiplexing optical fiber Bragg lattice sensor network is provided to execute monitoring without a collision at the center by multiplexing information received from each sensor. CONSTITUTION: A first sensor and a second sensor sense signals. A reflective semiconductor optical amplifier amplifies the amplitude of a signal reflected from the first sensor and the second sensor. The first and the second sensor are mutually independent. The peak of a pulse outputted from the reflective semiconductor optical amplifier is linearly changed.
Abstract:
PURPOSE: A voice phishing detection method based on distinctive weighted value learning in marine/voice communication is provided to detect voice phishing without a separate feature vector extraction process by using only a parameter extracted in a process which changes a signal into a voice signal. CONSTITUTION: An SMV(Selectable Mode Vocoder) decoder comprises a new feature vector by using a feature vector which is extracted in a process which changes an LSF(Line Spectral Frequency) into an LPC(Linear Prediction Coding); and a feature vector extracted in a process which changes the obtained LPC into a voice signal. The SMV decoder calculates likelihood for the transmitted bitstream by using a GMM(Gaussian Mixture Model) and selects a flag for a value with the maximum likelihood.
Abstract:
PURPOSE: A spanning tree based routing method using a local searching algorithm in a high mobility sensor network is provided to improve network utilization by providing an effective local searching algorithm. CONSTITUTION: An MST(Minimal Spanning Tree) is used as a start point of local searching(S210). A proximity solution is created(S220). Numbers of wiener are calculated for the proximity solution(S230). A tree including the smallest numbers of the wiener in the proximity solution are searched(S240). The numbers of the wiener is not changed, the tree which is acquired at the last is determined as the solution.
Abstract:
PURPOSE: A sensor using a self-injection locked reflective semiconductor optical amplifier for measuring marine temperature and strain is provided to measure changes in temperature and strain based on the power of an optical bragg lattice as the power of an optical fiber bragg lattice is linearly changed according to changes in the temperature and strain. CONSTITUTION: A sensor using a self-injection locked reflective semiconductor optical amplifier for measuring marine temperature and strain comprises a reflective semiconductor light amplifier(110), a variable optical fiber bragg grating(130), optical fiber bragg gratings(160-200), and a light spectrum analyzer(140). The reflective semiconductor light amplifier is self-injection locked. The variable optical fiber bragg grating generates variable laser sources by self-injection locking the reflective semiconductor light amplifier. [Reference numerals] (110) Reflective semiconductor light amplifier; (140) Light spectrum analyzer;