Abstract: An apparatus for actively tracking an object is provided. The apparatus includes a camera unit; a motor drive for changing a shooting direction of the camera unit; and a controller for acquiring a first comparative image and a second comparative image in sequence using the camera unit, comparing the first comparative image with the second comparative image, detecting a moving direction and a speed of an identical object existing in the first and second comparative images, determining an estimated location of the object after receipt of the second comparative image based on the detected moving direction and speed, and enlarging and capturing the object in the estimated location of the object.

Abstract: There is provided a method for real-time target detection comprising detecting a preprocessed pixel as a target and/or a background, based on a library, and refining the library by extracting a sample from the target or the background.

Abstract: There is provided a method of localizing an object comprising projecting an object located on an object plane and a reference point corresponding thereto on a virtual viewable plane and an actual camera plane; estimating coordinates of the reference point; and prescribing a relationship between a location of the object and the coordinates of the reference point.

Abstract: There is provided a method for real-time target detection comprising detecting a preprocessed pixel as a target and/or a background, based on a library, and refining the library by extracting a sample from the target or the background.

Abstract: There is provided a method of tracking an object in a three-dimensional (3-D) space by using particle filter-based acoustic sensors, the method comprising selecting two planes in the 3-D space; executing two-dimensional (2-D) particle filtering on the two selected planes, respectively; and associating results of the 2-D particle filtering on the respective planes.

Abstract: A method of recognizing a self location of an image acquisition device by acquiring an image of two or more reference objects is provided.

Abstract: Disclosed is a voice registration method for voice recognition, comprising the steps of analyzing a spectrum of a sound signal inputted from the outside; extracting predetermined language units for a speaker recognition from a voice signal in the sound signal; measuring the loudness of each language unit; collecting voice data on registered (background) speakers including loudness data of the plurality of background speakers as a reference onto voice database; determining whether the loudness of each language unit is within a predetermined loudness range based on the voice data base; learning each language unit by using a multi-layer perceptron in the case that at least a predetermined number of language units are within the predetermined loudness range; and storing data on the learned language unit as data for recognizing the speaker. With this configuration, loudness of a speaker is considered at learning for registering his/her voice and at verifying a speaker.

Abstract: Disclosed is a voice registration method for voice recognition, comprising the steps of analyzing a spectrum of a sound signal inputted from the outside; extracting predetermined language units for a speaker recognition from a voice signal in the sound signal; measuring the loudness of each language unit; collecting voice data on registered(background) speakers including loudness data of the plurality of background speakers as a reference onto voice database; determining whether the loudness of each language unit is within a predetermined loudness range based on the voice data base; learning each language unit by using a multi-layer perceptron in the case that at least a predetermined number of language units arc within the predetermined loudness range; and storing data on the learned language unit as data for recognizing the speaker.

Abstract: A system for restoring a digital TV signal, comprising a signal dividing means receiving the digital TV signal, and dividing the digital TV signal into digital video signals and digital audio signals after a predetermined signal processing; a video decoding means decoding the digital video signals outputted from the signal dividing means into analog video signals, and outputting low frequency analog video signals by colors; an audio decoding means decoding the digital audio signals outputted from the signal dividing means into analog audio signals with a plurality of channels corresponding to predetermined frequencies; a plurality of frequency-modulators frequency-modulating the low frequency analog video signals and the analog audio signals, in response to intermediate frequencies, respectively; a computer system having a wireless transmitter wirelessly transmitting the signals modulated by the frequency-modulators; a plurality of wireless receivers wirelessly receiving the analog video and audio signals tra