• Title/Summary/Keyword: RTSP Streams

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Design and Implementation of Dynamic Streaming Server based on RTSP (RTSP 기반의 동적 스트리밍 서버의 설계 및 구현)

  • Yeon, Jae-Hyuk;Lim, Hyo-Taek;Park, Jae-Hong
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2010.10a
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    • pp.407-410
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    • 2010
  • This paper is to implement a RTSP based streaming server in order to provide streaming service. When a client requests a stream from a server, transmission speed is measured on a regular basis through communications between the client and the server. Server will send different encoded movie clip streams based on measured transmission speeds. Different streams are sent to a server depending on the transmission speed and their locations are saved when streams are sent. Even though different streams are sent, the streams will be sent without any interruptions because they are sent from their original locations.

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Real-time Smoke Detection Based on Colour Information, Morphological and Dynamic Features of the Smoke (연기의 색 정보, 형태학적 및 동적 특징 기반의 실시간 연기 검출)

  • Kim, Hyun-Tae;Park, Jang-Sik
    • The Journal of the Korea institute of electronic communication sciences
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    • v.10 no.1
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    • pp.21-26
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    • 2015
  • In this paper, we propose a system which can detect the smoke in real time from the high-quality IP camera. For real-time processing, open directly the RTSP streams transmitted from the IP camera using the library FFmpeg as opening a video file. To recognize smoke, color information and morphological characteristics of smoke, as well as the dynamic characteristics of the smoke also considered for candidate regions. To combine the characteristics of the various smoke effectively, the Adaboost algorithm, was used as the boosting algorithm finally. Through the experiments with input videos from IP camera, the proposed algorithms were useful to detect smokes.

Real-time Flame Detection Using Colour and Dynamic Features of Flame Based on FFmpeg (화염의 색상 및 동적 특성을 이용한 FFmpeg 기반 실시간 화염 검출)

  • Kim, Hyun-Tae
    • The Journal of the Korea institute of electronic communication sciences
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    • v.9 no.9
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    • pp.977-982
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    • 2014
  • In this paper, we propose a system which can detect the flame in real time from the high-quality IP camera. First, open directly the RTSP streams transmitted from the IP camera using the library FFmpeg as opening a video file. The second thing is to extract the background images from video signal using Gaussian mixture model. Then the foreground images are obtained through subtracting operation between the input image and the background image. Separated foreground image through a mathematical morphology operation are considered as candidate area. By analysing colour information and dynamic characteristics of the candidate area, flame is determined finally. Through the experiments with input videos from IP camera, the proposed algorithms were useful to detect flames.

CORBA-based Distributed Multimedia Communication Systems for Controlling and Managing Multimedia Streams (멀티미디어 스트림 제어 및 관리를 위한 CORBA 기반 분산 멀티미디어 통신 시스템)

  • 박상윤;정길호;박상현;엄영익
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.26 no.11C
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    • pp.51-63
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    • 2001
  • According to the popular use of the multimedia services in distributed environments, the need for the variable multimedia communication technologies have been presented today. In order to support the efficient transmission multimedia streams, the multicasting, and the interoperability between multimedia applications in distributed environments, the development of the open exclusive multimedia communication systems and the provision of the control and management methodologies for media streams have been required. In order support the realtime transmission of multimedia stream in distributed environments. the protocols such as RTP, RSVP, and RTSP have been standardized. For supporting the interoperability between multimedia applications and the control and management of streams, the distributed processing platforms such as CORBA by OMG and DSM-CC by DAVIC were published. In this paper, we introduce the CORBA-based distributed multimedia communication system which support the realtime transmission, control, and management of multimedia streams and provide the interoperability between multimedia applications. Finally, we present the QoS measurement results by the interoperability between our systems and VoD systems.

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A Proxy based QoS Provisioning Mechanism for Streaming Service in Wireless Networks (무선이동통신망에서 스트리밍 서비스를 위한 프락시 기반Qos 보장 방안)

  • Kim Yong-Sul;Hong Jung-Pyo;Kim Hwa-Sung;Yoo Ji-Sang;Kim Dong-Wook
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.31 no.7B
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    • pp.608-618
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    • 2006
  • The increasing popularity of multimedia streaming services introduces new challenges in content distribution. Especially, it is important to provide the QoS guarantees as they are increasingly expected to support the multimedia applications. The service providers can improve the performance of multimedia streaming by caching the initial segment (prefix) of the popular streams at proxies near the requesting clients. The proxy can initiate transmission to the client while requesting the remainder of the stream from the server. In this paper, in order to apply the prefix caching service based on IETF's RTSP environment to the wireless networks, we propose the effective RTSP handling scheme that can adapt to the radio situation in wireless network and reduce the cutting phenomenon. Also, we propose the traffic based caching algorithm (TSLRU) to improve the performance of caching proxy. TSLRU classifies the traffic into three types, and improve the performance of caching proxy by reflecting the several elements such as traffic types, recency, frequency, object size when performing the replacement decision. In simulation, TSLRU and RTSP handling scheme performs better than the existing schemes in terms of byte hit rate, hit rate, startup latency, and throughput.

Design and Implementation of Media Manager in Multimedia Streaming Framework (스트리밍 프레임워크에서 미디어 관리자의 설계 및 구현)

  • Lee, Jae-Wook;Lee, Sung-Young;Hong, Een-Kee
    • Journal of KIISE:Computing Practices and Letters
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    • v.7 no.4
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    • pp.273-287
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    • 2001
  • In this paper, we introduce our experience for designing and implementing a media manager in the Integrated Streaming Service Architecture (ISSA) developed by the authors. The media manager is regarded as a necessary module in the ISSA framework for the following reasons. It realizes that from which locations of the media source devices, the media streams are coming. Once it knows where the origin is, the media manager should recognizes what types of stream are. After that, it performs how to chose an appropriate CODEC to handle the recognized input streams efficiently, and what type of media playback device should be selected. In order to do such a job efficiently, the proposed media manager consists of two modules source module and sink module. The major role of a media source module is to make an abstraction for the media streams that are coming from various types of media device. This, in consequence, enables a media manager to consistently handle tlle media streams without considering wherever they come from. On the other hand, the media sink module distributes the input streams to an appropriate media device to playback. One of the remarkable virtues of the proposed media manager is an ability to supporting high value-added database services since it provides an interface between the ISSA and real-time multimedia database. Also, it provides the RTP!RTSP source filter and Winamp gateway modules which allow the flexibility to the system. Moreover, the media manager can adopt any types of new media which in fact will provide scalability to the ISSA.

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