Abstract:
Disclosed are a proximity sensor and a proximity sensing method using an event-driven vision sensor. The proximity sensor includes a point distinguishing part which distinguishes a point of a light, outputted from a focused light source and reflected by an object, in an image photographed by the proximity sensor; and a distance determination part which determines a distance between the object and the proximity sensor based on the position of the point. [Reference numerals] (100) Proximity sensor; (101) Light source; (102) Object; (110) Pattern detecting part; (120) Image photographing part; (130) Point distinguishing part; (140) Distance determination part
Abstract:
A neuromorphic signal processing device for estimating the direction of a sound source using a plurality of neuron circuits. Embodiments in each band of a plurality of frequency bands include: a detection unit for detecting a detection spiking signal using a detection neuron circuit which corresponds to a specific time difference when a first signal and a second signal have a specific time difference and include the same input spiking signal; a multiplexing unit for outputting a multiplexed spiking signal based on a plurality of detection spiking signals which are outputted from a plurality of neuron circuits which correspond to a plurality of frequency bands in a specific time difference; and an integration unit for outputting an integration spiking signal which corresponds to a specific time difference based on a plurality of multiplexing spiking signals which correspond to a plurality of time differences. [Reference numerals] (111,113) Delay neuron;(112,114) Simultaneous detection neuron;(121,122) Multiplexing neuron;(131,132) Integration neuron;(AA) Frequency band;(BB) Time difference
Abstract:
PURPOSE: A spiking neuron based working memory is provided to recognize various patterns by temporarily storing an input pattern changed by time during a desired period. CONSTITUTION: A working memory(100) includes an input interface(110) and a plurality of memory elements(120,130,140). The input interface converts an input spike signal into a burst signal which is a spike signal of a burst structure with a specific shape and outputs. The plurality of memory elements successively store a feature value corresponding to one burst signal in one memory element according to the sequence of the outputted burst signal and continuously outputs the spike signal corresponding to the stored feature values. [Reference numerals] (110) Input unit; (120) 0-th storage unit; (130) First storage unit; (140) M-th storage unit
Abstract:
PURPOSE: A video conference apparatus and method for discriminating a speaker are provided to efficiently display a conference scene on the small display of a mobile terminal. CONSTITUTION: A speaker discriminating unit(210) discriminates a speaking participant in a video conference composed of a plurality of participants. A video data generator(220) creates video data which distinguishes and displays the discriminated participant and the plurality of participants except for the discriminated participant. A voice information collector(230) includes a plurality of voice acquisition units corresponding to each of the plurality of participants.
Abstract:
PURPOSE: A network synchronization method and a device thereof are provided to improve the performance of a jitter, a wander, and time synchronization by gradually increasing a window size for the measurement of transmission time. CONSTITUTION: A slave node measures transmission time from a slave node to a master node(310). The transmission time from the slave node to the master node is the summation or average between the transmission time T2-T1 from the slave node to the master node and the transmission time T4-T3 from the master node to the slave node. The slave node calculates a transmission time average value at (k+1)th time step(320). The slave node calculates an offset by using message transmission time at the master node, message reception time at the slave node, and the transmission time average value.
Abstract:
A WDMPON(Wavelength-Division-Multiplexed Passive Optical Network) is provided to use LEDs as a light source for optical communication by enabling a central office to have a pump means and enabling a remote node to has an amplifier, thereby realizing a high-quality optical communication service. A WDMPON comprises the followings: an ONU(Optical Network Unit)(400) for transceiving an optical communication service; a remote node(300) which has an amplifier(310) which amplifies a wavelength of light transmitted from the ONP(400); and a central office(100) which receives the amplified light. The central office(100) has a pump means(140) for amplifying the amplifier(310). The ONU(400) comprises LEDs(Light Emitting Diodes) as a light source from which the light is transmitted. The amplifier(310) has an isolator which amplifies only the light from the ONU(400) to the central office(100) and passes the amplified light.
Abstract:
파장 오프셋 편광분할 다중화 방식의 레이블링을 이용한 광 패킷 통신 시스템이 개시된다. 본 발명에 따른 파장 오프셋 편광분할 다중화 방식의 레이블링을 이용한 광 패킷 통신 시스템은 광패킷 스위칭 네트워크에서 송신단이 위치한 출발지 노드에 존재하고, 편광방향이 수직이며, 소정 파장 간격을 유지하는 패킷 데이터 및 레이블을 각각 생성하여 결합한 후, 경유지 노드로 전송하는 광신호 전송장치 및 전송받은 광신호로부터 레이블을 검출하여 패킷 데이터의 다음 이동 위치에 대한 정보를 검출하고, 새로운 레이블을 생성하여 검출된 레이블과 교체한 후, 검출된 다음 이동 위치로 패킷 데이터와 새로운 레이블을 결합시켜 전송하는 레이블 스와핑 장치를 포함한다. 본 발명에 의하면, 편광모드분산이나 편광의존손실 등으로 인해 발생하는 비팅 노이즈를 줄일 수 있으며, 보다 안정적이면서 저렴한 비용으로 패킷 데이터와 레이블을 전송할 수 있는 장점이 있다. 레이블링, 패킷 데이터, 광패킷 스위칭 네트워크, 레이블 스와핑, 편광 분할 다중화