• Title/Summary/Keyword: Ntsc

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The Techology, the Present, and the Future of Still Video Cameras (스틸 비디오 카메라의 기술, 현황 및 전망)

  • 이동춘;신형웅;안태식;최홍규
    • Proceedings of the Optical Society of Korea Conference
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    • 1990.07a
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    • pp.1-5
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    • 1990
  • Still video camera (SVC)가 도입된 동기 및 특성을 소개하고 구성장치가운데서 SVC의 가장 특징적인 charge coupled device (CCD) 장치의 동작을 TV의 NTSC 방식과 관련해서 기술하였다. 현황 향후과제, 시장성 및 전망에 대해서도 조사하였다.

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De-interlacing and Block Code Generation For Outsole Model Recognition In Moving Picture (동영상에서 신발 밑창 모델 인식을 위한 인터레이스 제거 및 블록 코드 생성 기법)

  • Kim Cheol-Ki
    • Journal of Intelligence and Information Systems
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    • v.12 no.1
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    • pp.33-41
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    • 2006
  • This paper presents a method that automatically recognizes products into model type, which it flows with the conveyor belt. The specific interlaced image are occurred by moving image when we use the NTSC based camera. It is impossible to process interlaced images, so a suitable post-processing is required. For the purpose of this processing, after it remove interlaced images using de-interlacing method, it leads rectangle region of object by thresholding. And then, after rectangle region is separated into several blocks through edge detection, we calculate pixel numbers per each block, re-classify using its average, and classify products into model type. Through experiments, we know that the proposed method represent high classification ratio.

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A Design of 8VSB Transmission System for Use in PAL Standard (PAL 표준 지역에 적합한 8VSB 송수신 시스템 설계)

  • 김대진;박성우
    • Journal of Broadcast Engineering
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    • v.3 no.1
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    • pp.1-12
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    • 1998
  • 8VSB transmission system of American standard and OFDM system of European standard are to be international standards for the transmission of digital terrestrial television. When countries using PAL standard adopt the American 8VSB system which is designed under the circumstance of NTSC system, one of strong interference is the co-channel PAL interference coming from analog PAL signal. In this paper, in order to solve this problem, we classified seven types of PAL system into three groups according to the bandwidth and a new PAL-8VSB system is proposed to reject the co-channel PAL interference by using modified comb filters suitable for each group. By computer simulations of the proposed PAL-8VSB system with the co-channel PAL interference it is confirmed that the proposed comb filter results in the improvement of DIU ratio by about 9 dB.

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A Study on the Improvement of Image Quality for a Thermal Imaging System with focal Plane Array Typed Sensor (초점면 배열 방식 열상 카메라 시스템의 화질 개선 연구)

  • 박세화
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.1 no.2
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    • pp.27-31
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    • 2000
  • Thermal imaging system is implemented for the measurement and the analysis of the thermal distribution of the target objects. The main Part of the system is thermal camera in which a focal plane array typed sensor is introduced The sensor detects mid-range infrared spectrum or target objects and then it output generic video signal which should be processed to form a thermal image frame. A digital signal processor(DSP) in the system inputs analog to digital converted data. performs algorithms to improve the thermal images and then outputs the corrected frame data to frame buffers for NTSC encoding and for digital outputs.. To enhance the quality of the thermal images, two point correction method is applied. Figures indicate that the corrected thermal images are much improved.

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Focus Control for CCD Camera using Annealing Algorithm (어닐링 알고리즘을 이용한 CCD 카메라 초점 제어)

  • 이관용;임신영;조성원
    • Journal of the Korean Institute of Intelligent Systems
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    • v.10 no.5
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    • pp.459-465
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    • 2000
  • In this paper, we propose a method for controlling camera focus in the short distance by analyzing NTSC signal of a CCD camera. When the distance between a camera and an object is less than about 1 meter, the existing CCD cameras with auto-focusing function are hard to acquire the proper images because they focus on the protruding minute parts ofthe object without taking into account the whole state of the object. To solve such a problem, we use an annealing algorithm to control the motor of a camera by analyzing the overall signal obtained from the camera. By doing so, we can acquire the adequate images at the near distance. The proposed method will be used for a personal identification system by human iris patterns.

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A study of the Implementation of Adaptive De-interlacing Algorithm with Improved Horizontal and Vertical Edges (수평 및 수직 윤곽선을 개선한 적응 주사선 보간 알고리즘 및 구현에 관한 연구)

  • Kwon, Yong-Jae;Park, No-Kyung;Moon, Dai-Tchul
    • Journal of IKEEE
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    • v.2 no.2 s.3
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    • pp.225-232
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    • 1998
  • Currently NTSC, PAL, and SECOM are widely used for TV broadcasting systems. In Korea, NTSC has been used to reduce transmission bandwidth and broadband flickers using the Interlaced scanning method. Image data in the Interlaced scanning method require De-interlacing compensation for PC-based multimedia applications. The existing compensation algorithms such as ZOI, FOI, and ELA provieds simple computations and effective image compensation while the PSNR is low and horizontal and vertical edges are hardly detected. In this paper, the ADI(Adaptive De-Interlacing) algorithm that can increase PSNR and detect horizontal and vertical edges is proposed and a hardware system is implemented using three ACTEL 1020B FPGA chips. The system consists of the algorithm part implemented using two FPGAs and the memory control part implemented using rest one. Also the system operation is investigated for real time processing.

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Implementation of the mote Image Based Metering System bridging with PCS Network (PCS망을 연동한 원격영상 검침시스템 구현)

  • Lee, Chang-Su;Na, Jong-Ray;Hwang, Jin-Kwon
    • The KIPS Transactions:PartD
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    • v.10D no.6
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    • pp.1041-1048
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    • 2003
  • This paper implements a remote image based metering(IBM) system which capture meter image, recognizes number automatically, and send the data wirelessly through PCS data network. We use existing gas/water meter and get NTSC camera image by installing small monochrome CMOS camera on the meter closely. For remote data transfer, we use SMS (short message service) that is provided by commercial PCS network. We developed DVR(digital video recorder) for capturing meter image and character recognition algorithm. In addition, hardware and software for SMS and meter selector were developed.

Design of Video Encoder activating with variable clocks of CCDs for CCTV applications (CCTV용 CCD를 위한 가변 clock으로 동작되는 비디오 인코더의 설계)

  • Kim, Joo-Hyun;Ha, Joo-Young;Kang, Bong-Soon
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.10 no.1
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    • pp.80-87
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    • 2006
  • SONY corporation preoccupies $80\%$ of a market of the CCD used in a CCTV system. The CCD of SONY have high duality which can not follow the progress of capability. But there are some problems which differ the clock frequency used in CCD from the frequency used in common video encoder. To get the result by using common video encoder, the system needs a scaler that could adjust image size and PLL that synchronizes CCD's with encoder's clock So, this paper proposes the video encoder that is activated at equal clock used in CCD without scaler and PLL. The encoder converts ITU-R BT.601 4:2:2 or ITU-R BT.656 inputs from various video sources into NTSC or PAL signals in CVBS. Due to variable clock, property of filters used in the encoder is automatically changed by clock and filters adopt multiplier-free structures to reduce hardware complexity. The hardware bit width of programmable digital filters for luminance and chrominance signals, along with other operating blocks, are carefully determined to produce hish-quality digital video signals of ${\pm}1$ LSB error or less. The proposed encoder is experimentally demonstrated by using the Altera Stratix EP1S80B953C6ES device.

Digital signal processing of automatic color control in VCR (비디오 레코더의 색신호 자동 조절 장치의 디지탈 신호처리)

  • 김동하;이정숙;강경용;권오일;이태원
    • Journal of the Korean Institute of Telematics and Electronics B
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    • v.33B no.6
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    • pp.119-127
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    • 1996
  • The proposed method uses a signal of the smae frequency as the input modulating carrier frequency and of a different phase. This signal is generated in the digital automatic frequency control part to decide the input color demodulated signal. And the phase error from the burst signal is calculated. The calculated phase error is utilized to rmove the phase error contained inthe demodulated color signal. In this paper, digital signal processing of automatic color control is proposed for VCR system campatible with both NTSC and PAL TV systems.

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