• Title/Summary/Keyword: Wireless Video Sensor

Search Result 59, Processing Time 0.024 seconds

A Multimedia Data Compression Scheme for Disaster Prevention in Wireless Multimedia Sensor Networks

  • Park, Jun-Ho;Lim, Jong-Tae;Yoo, Jae-Soo;Oh, Yong-Sun;Oh, Sang-Hoon;Min, Byung-Won;Park, Sun-Gyu;Noh, Hwang-Woo;Hayashida, Yukuo
    • International Journal of Contents
    • /
    • v.11 no.2
    • /
    • pp.31-36
    • /
    • 2015
  • Recent years have seen a significant increase in demand for multimedia data over wireless sensor networks for monitoring applications that utilize sensor nodes to collect multimedia data, including sound and video. However, the multimedia streams generate a very large amount of data. When data transmission schemes for traditional wireless sensor networks are applied in wireless multimedia sensor networks, the network lifetime significantly decreases due to the excessive energy consumption of specific nodes. In this paper, we propose a data compression scheme that implements the Chinese remainder theorem to a wireless multimedia sensor network. The proposed scheme uses the Chinese Remainder Theorem (CRT) to compress and split multimedia data, and it then transmits the bit-pattern packets of the remainder to the base station. As a result, the amount of multimedia data that is transmitted is reduced. The superiority of our proposed scheme is demonstrated by comparing its performance to that of an existing scheme. The results of our experiment indicate that our proposed scheme significantly increased the compression ratio and reduced the compression operation in comparison to those of existing compression schemes.

Prioritized Multipath Video Forwarding in WSN

  • Asad Zaidi, Syed Muhammad;Jung, Jieun;Song, Byunghun
    • Journal of Information Processing Systems
    • /
    • v.10 no.2
    • /
    • pp.176-192
    • /
    • 2014
  • The realization of Wireless Multimedia Sensor Networks (WMSNs) has been fostered by the availability of low cost and low power CMOS devices. However, the transmission of bulk video data requires adequate bandwidth, which cannot be promised by single path communication on an intrinsically low resourced sensor network. Moreover, the distortion or artifacts in the video data and the adherence to delay threshold adds to the challenge. In this paper, we propose a two stage Quality of Service (QoS) guaranteeing scheme called Prioritized Multipath WMSN (PMW) for transmitting H.264 encoded video. Multipath selection based on QoS metrics is done in the first stage, while the second stage further prioritizes the paths for sending H.264 encoded video frames on the best available path. PMW uses two composite metrics that are comprised of hop-count, path energy, BER, and end-to-end delay. A color-coded assisted network maintenance and failure recovery scheme has also been proposed using (a) smart greedy mode, (b) walking back mode, and (c) path switchover. Moreover, feedback controlled adaptive video encoding can smartly tune the encoding parameters based on the perceived video quality. Computer simulation using OPNET validates that the proposed scheme significantly outperforms the conventional approaches on human eye perception and delay.

Frame Complexity-Based Adaptive Bit Rate Normalization (프레임 복잡도를 고려한 적응적 비트율 정규화 방법)

  • Park, Sang-Hyun
    • The Journal of the Korea institute of electronic communication sciences
    • /
    • v.10 no.12
    • /
    • pp.1329-1336
    • /
    • 2015
  • Due to the advances in hardware technologies for low-power CMOS cameras, there have been various researches on wireless video sensor network(WVSN) applications including agricultural monitoring and environmental tracking. In such a system, its core technologies include video compression and wireless transmission. Since data of video sensors are bigger than those of other sensors, it is particularly necessary to estimate precisely the traffic after video encoding. In this paper, we present an estimation method for the encoded video traffic in WVSN networks. To estimate traffic characteristics accurately, the proposed method first measures complexities of frames and then applies them to the bit rate estimation adaptively. It is shown by experimental results that the proposed method improves the estimation of bit rate characteristics by more than 12% as compared to the existing method.

A study on the implementation of the wireless video security system (무선 영상보안시스템 구현에 관한 연구)

  • Kim, Young-Min;Kim, Myeong-Hwan;Kim, Sun-Hyung
    • Asia-Pacific Journal of Business Venturing and Entrepreneurship
    • /
    • v.7 no.1
    • /
    • pp.99-104
    • /
    • 2012
  • In this paper, implementation of a wireless video security system relates to a situation outside of using infrared sensors to detect changes when using Zigbee network security in the area of the sensor sends information to the server. The server can judge the situation if an emergency situation through the IP network security camera shot of the area to be transferred command to pantilte. The camera images and information in the security area, sent to administrator's smartphone users to control the camera can see the situation and More than a small video security system was designed so that user can monitor the security zone. Finally, for real-time to identify and respond to emergency situations based on the available wireless networks for video surveillance systems were verified through research and implementation.

  • PDF

An Intelligent Moving Wireless Camera Surveillance System with Motion sensor and Remote Control (무선조종과 모션 센서를 이용한 지능형 이동 무선감시카메라 구현)

  • Lee, Young Woong;Kim, Jong-Nam
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
    • /
    • 2009.05a
    • /
    • pp.661-664
    • /
    • 2009
  • Recently, intelligent surveillance camera systems are needed popularly. However, current researches are focussed on improvement of a single module rather than implementation of an integrated system. In this paper, we implemented a moving wireless surveillance camera system which is composed of face detection, and using motion sensor. In our implementation, we used a camera module from SHARP, a pair of wireless video transmission module from ECOM, body of moving robot used for A4WD1 Combo kit for RC, a pair of ZigBee RF wireless transmission module from ROBOBLOCK, and a motion sensor module (AMN14111) from PANASONIC. We used OpenCV library for face dection and MFC for implement software. We identified real-time operations of face detection, PTT control, and motion sensor detecton. Thus, the implemented system will be useful for the applications of remote control, human detection, and using motion sensor.

  • PDF

A Marking Algorithm for QoS Provisioning in WMSN (WMSN에서 QoS 보장을 위한 마킹 알고리즘)

  • Kim, Jeonghue;Lee, Sungkeun;Koh, Jingwang;Jung, Changryul
    • The Journal of the Korea institute of electronic communication sciences
    • /
    • v.5 no.2
    • /
    • pp.193-204
    • /
    • 2010
  • Since Wireless Multimedia Sensor Network(WMSN) needs to process various multimedia data such as audio, image and video data as well as scalar data, it requires a mechanism that can support Quality of Service(QoS) to handle efficiently. This paper classifies traffic in WMSN as periodic monitoring traffic, event traffic, multimedia traffic and query-based traffic, proposes marking algorithm and queue management mechanism that guarantee differentiated QoS in terms of delay, energy efficiency and credibility on each traffic and conduct performance analysis with simulation.

Drone Deployment Using Coverage-and-Energy-Oriented Technique in Drone-Based Wireless Sensor Network (드론 기반 무선 센서 네트워크에서의 커버리지와 에너지를 고려한 드론 배치)

  • Kim, Tae-Rim;Song, Jong-Gyu;Im, Hyun-Jae;Kim, Bum-Su
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.20 no.8
    • /
    • pp.15-22
    • /
    • 2019
  • Awireless sensor network utilizes small sensors with a low cost and low power being deployed over a wide area. They monitor the surrounding environment and gather the associated information to transmit it to a base station via multi-hop transmission. Most of the research has mainly focused on static sensors that are located in a fixed position. Unlike a wireless sensor network based on static sensors, we can exploit drone-based technologies for more efficient wireless networks in terms of coverage and energy. In this paper, we introduce a transmission power model and a video encoding power model to design the network environment. We also explain a priority mapping scheme, and deploy drones oriented for network coverage and energy consumption. Through our simulations, this research shows coverage and energy improvements in adrone-based wireless sensor network with fewer sensors, compared to astatic sensor-based wireless sensor network. Concretely, coverage increases by 30% for thedrone-based wireless sensor network with the same number of sensors. Moreover, we save an average of 25% with respect to the total energy consumption of the network while maintaining the coverage required.

Performance Evaluation of Wireless Sensor Networks in the Subway Station of Workroom (지하철 역사내 무선 센서네트워크 환경구축을 위한 무선 스펙트럼 분석 및 전송시험에 관한 연구)

  • An, Tea-Ki;Kim, Gab-Young;Yang, Se-Hyun;Choi, Gab-Bong;Sim, Bo-Seog
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.12 no.7
    • /
    • pp.3220-3226
    • /
    • 2011
  • In order to monitor internal risk factors such as fire, terror, etc. on the subway station, the surveillance systems using CCTV and various kinds of sensors have been implemented and recently, introduction of surveillance systems using an advanced IT technology, sensor network technology is tried on several areas. Since 2007, Korean government has made an effort to develop the intelligent surveillance and monitoring system, which can monitor fire, intrusion, passenger congestion, health-state of structure, etc., by using wireless sensor network technology and intelligent video analytic technique. For that purpose, this study carried out field wireless communication environment test on Chungmuro Station of Seoul Metro on the basis of ZigBee that is considered as a representative wireless sensor network before field application of the intelligent integrated surveillance system being developed, arranged and analyzed and ZigBee based wireless communication environment test results on the platform and waiting room of Chungmuro Station on this paper. Results of wireless spectrum analysis on the platform and waiting room showed that there is no radio frequency overlapped with that of ZigBee based sensor network and no frequency interference with adjacent frequencies separated 10MHz or more. As results of wireless data transmission test using ZigBee showed that data transmission is influenced by multi-path fading effect from the number and flow rate of passengers on the platform or the waiting room rather than effects from entrance and exit of the train to/from the platform, it should be considered when implementing the intelligent integrated surveillance system on the station.

Multipath and Multipriority based Routing Protocol for Wireless Multimedia Sensor Networks (무선 멀티미디어 센서 네트워크에서 다중 경로와 다중 우선순위 기반의 라우팅 알고리즘)

  • Lee, Dong-Hoon;Gautam, Navin;Pyun, Jae-Young
    • The Journal of The Korea Institute of Intelligent Transport Systems
    • /
    • v.10 no.3
    • /
    • pp.101-109
    • /
    • 2011
  • In this paper, we present a new routing protocol, multipath and multi-priority based routing protocol, (MMRP) for wireless multimedia sensor networks. The proposed MMRP chooses the multiple routing paths from source to the sink, then the selected paths are assigned with different priority levels depending upon the residual energy and transmission delay in the routing paths. That is, the highly prioritized I frames of the MPEG video are transmitted over the high priority routing paths, and other P and B frames are transmitted over the lower priority routing paths. The proposed MMRP protocol can be applied to time critical applications which require both lower latency and low power consumption over wireless multimedia sensor network. Simulations results of MMRP protocol show respectively an improvement of 23.48% and 23.11% in energy conservation and 81.6% and 32.01% improvement in latency as compared to protocols without and with multipath routing.

Design of Miniaturized Telemetry Module for Bi-Directional Wireless Endoscopy

  • Park, H. J.;H. W. Nam;B. S. Song;J. H. Cho
    • Proceedings of the IEEK Conference
    • /
    • 2002.07a
    • /
    • pp.494-496
    • /
    • 2002
  • A bi-directional and multi-channel wireless telemetry capsule, 11mm in diameter, is presented that can transmit video images from inside the human body and receive a control signal from an external control unit. The proposed telemetry capsule includes transmitting and receiving antennas, a demodulator, decoder, four LEDs, and CMOS image sensor, along with their driving circuits. The receiver demodulates the received signal radiated from the external control unit. Next, the decoder receives the stream of control signals and interprets five of the binary digits as an address code. Thereafter, the remaining signal is interpreted as four bits of binary data. Consequently, the proposed telemetry module can demodulate external signals so as to control the behavior of the camera and four LEDs during the transmission of video images. The proposed telemetry capsule can simultaneously transmit a video signal and receive a control signal determining the behavior of the capsule itself. As a result, the total power consumption of the telemetry capsule can be reduced by turning off the camera power during dead time and separately controlling the LEDs for proper illumination of the intestine.

  • PDF