Abstract:
본 발명은 오디오 신호의 보존에 기초한 음파 통신에서 정보 송수신 시스템 및 방법, 그리고 이에 적용되는 장치를 개시한다. 본 발명에 따른 오디오 신호의 보존에 기초한 음파 통신에서 정보 송수신 시스템은, 가청주파수 대역에서 원래 음원의 손상이 없이 사람의 귀에 들리지 않게 데이터를 삽입하여 오디오 콘텐츠를 이용한 음파 통신을 하기 위한 구성으로 이루어진다. 따라서, 본 발명은 기존의 TV/라디오 방송망 및 사설 구내방송 등의 기존 시설에 대한 변경 없이 오디오 콘텐츠 기반의 부가 데이터를 휴대폰 등과 같은 개인 음향기기로 전달할 수 있으며, 오디오 콘텐츠에 대한 원음에 대한 손상을 최대한으로 줄이면서 음파 통신으로 데이터를 전달할 수 있다.
Abstract:
PURPOSE: A mobile robot with a caterpillar and a driving wheel is provided to enhance energy efficiency by preventing unnecessary use of power when driving. CONSTITUTION: A mobile robot with a caterpillar and a driving wheel comprises a body unit(100), a main wheel support board(200), an auxiliary wheel support board(300), a first driving wheel(410), a driving caterpillar(430), a second driving wheel(420), a first driving motor, a caterpillar assembly motor, a caterpillar driving motor, a second driving motor, and a control unit. The caterpillar assembly motor assembles the driving caterpillar. The control unit controls operation of the first driving motor, the caterpillar assembly motor, the caterpillar driving motor, and the second driving motor.
Abstract:
PURPOSE: A sound quality improvement device and a method thereof are provided to minimize quality degradation generated by inserting data into an original sound signal. CONSTITUTION: A sound signal quality improvement device(110) includes a coefficient calculation unit(111), a size calculation unit(112), a phase value storage unit(113), and a quality correcting unit(114). The coefficient calculation unit calculates the frequency conversion coefficient of a sound signal by converting frequencies for the original sound signal and the sound signal including data. A size calculation unit calculates the size of a frequency conversion coefficient in the sound signal including the data and the frequency conversion coefficient of the original sound signal. The phase value storage unit stores the phase value of the sound signal including the data. The quality correcting unit corrects the quality of the sound signal including the data based on the phase value and size of the frequency coefficient of the sound signal. [Reference numerals] (111) Coefficient calculation unit; (112) Size calculation unit; (113) Phase value storage unit; (114) Quality correcting unit; (115) SNR calculation unit; (116) Adjusting unit; (117) Converting unit
Abstract:
PURPOSE: A sound quality improvement system of data transfer communications, a method thereof, and an apparatus applied to the same are provided to minimize the sound deterioration of an audio signal. CONSTITUTION: A transmitting device(100) corrects amplitude distortion of a modulation audio signal. The transmitting device inverses the modulation audio signal. The transmitting device generates an output audio signal. A receiving device(200) receives the output audio signal. The receiving device outputs data from the output audio signal.
Abstract:
PURPOSE: An information transmission/reception system and a method thereof in sound wave communication are provided to transfer additional data based on audio content to a personal sound device. CONSTITUTION: A transmission unit(100) selects frequency section. The transmission unit generates a modulated audio signal. The transmission unit outputs an audio signal which is formed through reverse conversion related to the modulated audio signal. A reception unit(200) receives the output audio signal. The reception unit extracts the information data from the output audio signal.
Abstract:
PURPOSE: A foreign language speaking evaluation method and system using a speech recognition technique are provided to accurately evaluate the pronunciation of a foreign language by removing unnecessary habit through normalization. CONSTITUTION: A voice input module(100) inputs voice of a learner and a native speaker. A preprocessing module(200) preprocesses evaluation of the voice of a learner. A foreign language speaking estimating module(700) evaluates foreign speaking performance of a learner.