Abstract:
본 발명의 실시예에 따른 비디오 데이터 제공 방법은 정규 채널, 패칭 채널 및 복수의 세그먼트로 분할된 비디오 데이터 중 첫번째 세그먼트와 같은 크기를 가지는 패칭 보조 채널을 서버와 연결하는 단계와, 사용자 클라이언트 비디오 데이터 요청 신호를 상기 서버로 전송하는 단계와, 상기 첫번째 세그먼트 중 상기 비디오 데이터 요청 신호의 전송 시점 이전에 스트리밍된 부분인 전단부를 상기 패칭 채널을 통해 전송받는 단계와, 상기 전단부를 재생하는 단계와, 상기 첫번째 세그먼트 중 상기 비디오 데이터 요청 신호의 전송 시점 이후에 스트리밍될 부분인 후단부을 상기 패칭 보조 채널을 통해 전송받는 단계와, 상기 첫번째 세그먼트를 제외하고 상기 두번째 세그먼트를 포함하는 나머지 세그먼트들을 상기 정규 채널을 통해 전송받아 버퍼링하는 단계 및 후단부 및 상기 나머지 세그먼트들을 재생하는 단계를 포함한다. 사용자의 대기 시간을 더욱 단축하고 비디오 데이터를 스트림의 끊김 없이 재생할 수 있다. 주문형 비디오, 대기 시간, 데이터 분할 방식.
Abstract:
본 발명은 디지털 감시 시스템에 템플레이트(Template) 데이터베이스를 이용한 실시간 이미지 검색기술을 적용하여 감시 관리자의 효율적인 감시를 위한 지능형 감시 방법 및 시스템에 관한 것이다. 본 발명에 따른 실시간 이미지 검색을 이용한 지능형 감시 방법은 위험요소라고 판단되는 모양 및 장면이 담긴 템플레이트 이미지를 저장하여 템플레이트 이미지 데이터베이스를 구축하는 단계 및 상기 템플레이트 이미지 데이터베이스를 참조하여 감시 카메라에서 취득한 정지 영상의 위험도 등급을 판단하는 단계를 포함한다. 모양기반, 다차원 색인, 감시 카메라, 지능형
Abstract:
PURPOSE: A three-dimensional active position tracking system and a method thereof are provided to precisely trace a position of a target within a building. CONSTITUTION: A three-dimensional(3D) active position tracking system comprises a 3D position tracking antenna part(210), a received signal strength calculation part(220), a direction estimation part(230), and a position tracking part(240). The 3D position tracking antenna part includes a plurality of directional antennas. The directional antennas are three-dimensionally arranged in order to have different orientation directions. The received signal strength calculation part calculates received signal strength of a beacon signal with respect to the directional antennas in order to output a plurality of vector values corresponding to the directional antenna. The direction estimation part adds up the vector values in order to calculate a beacon signal generation direction. The position tracking part traces the location of a target terminal which transmits the beacon signal based on the beacon signal generation direction.
Abstract:
PURPOSE: An emergency rescue system and a method for detecting position are provided to transmit an emergency rescue signal to a terminal in remote site within constant distance from the terminal using a zigbee module even in case a rescue request person does not possess the terminal. CONSTITUTION: A zigbee module generates a rescue request signal. A terminal receives the rescue request signal and sends to a central control chamber using conventional communications network. The central control chamber receives the rescue request signal and detects a broad area location using the location of the terminal and dispatches a rescue team. The rescue team moves to the broad area location and detects the location of the zigbee module by directly receiving the rescue request signal generated from the zigbee module.
Abstract:
PURPOSE: A node of a zigbee network for the selection of a parent node, a method for parent node selection, and a reliability model measurement method of the zigbee network are provided to differently apply a reliability model to network configuration according to the installation location of a sensor node and the design of a node. CONSTITUTION: A communication unit(140) receives each reliability model of neighbor nodes from the neighbor node. Using a received reliability model, a parent node selecting unit(150) selects one of the neighbor node as a parent node. The parent node selecting unit selects a plurality of candidate parent nodes with an LQI(Link Quality Indicator) and hop for the each neighbor node. The parent node selecting unit selects a node having the greatest reliability of the candidate parent node as the parent node.
Abstract:
PURPOSE: A system and a method for preventing the occurrence of a missing child are provided to continuously check a distance between a location transmitter and a location receiver, thereby preventing a situation of a ward to be a missing child in advance. CONSTITUTION: A location transmitter(10) periodically sends a location signal. A location receiver(20) receives the location signal and determines spaced distance with the location transmitter. If the spaced distance escapes the preset range, the location receiver generates an alarm signal. The location transmitter and the location receiver directly exchanges signals wirelessly in a close distance. The location transmitter is mounted to a mobile phone of a guardian.
Abstract:
감시 네트워크를 이용한 객체 이동 경로 추적 방법 및 시스템을 개시한다. 감시 네트워크를 이용한 객체 이동 경로 추적 시스템은 객체의 영상을 획득하는 복수의 감시 카메라로 구성된 감시 네트워크; 상기 감시 카메라에서 획득한 영상에서 객체들의 특징 정보를 추출하는 객체 인식부; 및 상기 객체들의 특징 정보를 기초로 상기 객체들을 구별하기 위한 이미지 색인 구조와 상기 객체의 영상이 획득된 시간을 나타내는 시공간 색인 구조를 생성하는 색인부를 포함한다. 시공간 색인, 감시 카메라, 객체, 네트워크, 추출.
Abstract:
PURPOSE: A monitoring method and a system thereof using a danger image to roughly express the danger image are provided to easily perform a feature extraction and determination by displaying the degree of danger in an image obtaining from a monitoring camera. CONSTITUTION: A danger feature information extractor(111) extracts the feature information of the danger image in which the product determined as a risk factor is included. A multidimensional index contracting unit(112) drives a multi dimensional index structure by using feature information. An image database(113) stores the danger image. A danger degree decision manager decides the dangerous grade of the image.
Abstract:
PURPOSE: A method and a system for tracing trajectories of moving objects using a monitoring system network are provided to check a common object in an image transmitted from a monitoring camera, thereby tracking the trajectories of the moving objects. CONSTITUTION: A monitoring network(101) has a plurality of monitoring cameras obtaining an image of an object. An object recognizing unit(102) extracts feature information of the object from an image obtained by the monitoring camera. An indexing unit(103) generates an image indexing structure and a space-time indexing structure based on the feature information of the object. The image indexing structure is a structure for distinguishing the object. The space-time indexing structure shows time when an image of the object is obtained.
Abstract:
PURPOSE: An emergency relief system and a control method for relieving a person in an emergency by accurately tracing an emergency caller are provided to accurately trace the location of an emergency call terminal by sharing a candidate place of the emergency call terminal. CONSTITUTION: An emergency call signal is received from an emergency calling terminal(S510). The candidate locations of the emergency calling terminal calculates based on the received emergency call signal(S520). A final position of the emergency calling terminal is calculated and excluded from the direction of the emergency call signal(S530, S540).