Abstract:
본 발명은 게이트웨이에 수신된 각 메시지에 대하여 지연시간을 산출하고 이를 기반으로 허용 지연시간이 제일 적게 남은 메시지가 먼저 전송될 수 있도록 게이트웨이 내에서 전송 우선순위를 조정함으로써, 차량 게이트웨이의 실시간 데이터 처리성능을 향상시키고 시간 지연으로 인한 전송 오류를 방지할 수 있는 차량 게이트웨이의 실시간 데이터 처리성능 향상 방법 및 그 시스템에 관한 것이다.
Abstract:
PURPOSE: A device for detecting a vehicle and calculating the distance between the vehicles using stereo vision are provided to recognize the vehicle with a simple method about a vehicle nominating area detected from the image by determining availability in Canny Edge image extracted by vehicle detection technology based on a computer. CONSTITUTION: A device for detecting a vehicle and calculating the distance between the vehicles using stereo vision comprises a stereo vision unit(100), a pre-processor(110), and a unit(120) for detecting the vehicle and calculating the distance between the vehicles. The stereo vision unit detects the left image and the distance image corrected from an image signal. The image signal is filmed by right and left cameras installed in the vehicle. The pre-processor extracts edge information based on an output signal of the stereo vision unit. The unit for detecting the vehicle and calculating the distance between the vehicles detects a corner of the vehicle based on the edge information. The unit detects the vehicle and calculates the distance between the vehicles from image information through expanding a vehicle area, grouping, and testing availability. [Reference numerals] (101) Left camera; (102) Right camera; (103) Stereo vision module; (104) Rectified left image; (105) Depth image; (111) Multi-scale image module; (112) Histogram smoothing module; (113) Canny edge detecting module; (121) Vehicle corner detecting module; (122) Vehicle area expanding module; (123) Vehicle area grouping module; (124) Vehicle area effectiveness checking module; (125) Inter-vehicle distance calculating module
Abstract:
PURPOSE: A real time voice activity detecting device and a method thereof are provided to store a voice signal in a plurality of parallel buffers and simultaneously extract two feature information from the stored data. CONSTITUTION: A sound signal buffering unit(120) buffers a digital sound signal of a sound signal obtaining unit(110). A periodicity calculating unit(130) calculates whether the stored sound signal has a periodic feature at a sound frame unit. A voice detection output unit(150) outputs a voice detection signal according to the calculation result. A sample delay storage unit(160) delays and stores the sound signal as much as reference time to output the stored sound signal by synchronization with an output signal of the voice detection output unit. [Reference numerals] (100) Real time voice activity detecting device; (110) Sound signal obtaining unit; (120) Sound signal buffering unit; (130) Periodical calculating unit; (140) Energy calculating unit; (150) Voice detection output unit; (160) Sample delay storage unit; (AA) Voice signal; (BB) Voice activity detection result; (CC) Delayed voice signal