• Title/Summary/Keyword: Video

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Automatic Video Genre Classification Method in MPEG compressed domain (MPEG 부호화 영역에서 Video Genre 자동 분류 방법)

  • Kim, Tae-Hee;Lee, Woong-Hee;Jeong, Dong-Seok
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.27 no.8A
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    • pp.836-845
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    • 2002
  • Video summary is one of the tools which can provide the fast and effective browsing for a lengthy video. Video summary consists of many key-frames that could be defined differently depending on the video genre it belongs to. Consequently, the video summary constructed by the uniform manner might lead into inadequate result. Therefore, identifying the video genre is the important first step in generating the meaningful video summary. We propose a new method that can classify the genre of the video data in MPEC compressed bit-stream domain. Since the proposed method operates directly on the compressed bit-stream without decoding the frame, it has merits such as simple calculation and short processing time. In the proposed method, only the visual information is utilized through the spatial-temporal analysis to classify the video genre. Experiments are done for 6 genres of video: Cartoon, commercial, Music Video, News, Sports, and Talk Show. Experimental result shows more than 90% of accuracy in genre classification for the well -structured video data such as Talk Show and Sports.

An Advanced Coding for Video Streaming System: Hardware and Software Video Coding

  • Le, Tuan Thanh;Ryu, Eun-Seok
    • Journal of Internet Computing and Services
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    • v.21 no.4
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    • pp.51-57
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    • 2020
  • Currently, High-efficient video coding (HEVC) has become the most promising video coding technology. However, the implementation of HEVC in video streaming systems is restricted by factors such as cost, design complexity, and compatibility with existing systems. While HEVC is considering deploying to various systems with different reached methods, H264/AVC can be one of the best choices for current video streaming systems. This paper presents an adaptive method for manipulating video streams using video coding on an integrated circuit (IC) designed with a private network processor. The proposed system allows to transfer multimedia data from cameras or other video sources to client. For this work, a series of video or audio packages from the video source are forwarded to the designed IC via HDMI cable, called Tx transmitter. The Tx processes input data into a real-time stream using its own protocol according to the Real-Time Transmission Protocol for both video and audio, then Tx transmits output packages to the video client though internet. The client includes hardware or software video/audio decoders to decode the received packages. Tx uses H264/AVC or HEVC video coding to encode video data, and its audio coding is PCM format. By handling the message exchanges between Tx and the client, the transmitted session can be set up quickly. Output results show that transmission's throughput can be achieved about 50 Mbps with approximately 80 msec latency.

A VIDEO GEOGRAPHIC INFORMATION SYSTEM FOR SUPPORTING BI-DIRECTIONAL SEARCH FOR VIDEO DATA AND GEOGRAPHIC INFORMATION

  • Yoo, Jea-Jun;Joo, In-Hak;Park, Jong-Huyn;Lee, Jong-Hun
    • Proceedings of the KSRS Conference
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    • 2002.10a
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    • pp.151-156
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    • 2002
  • Recently, as the geographic information system (GIS) which searches, manages geographic information is used more widely, there is more requests for some systems which can search and display more actual and realistic information. As a response to these requests, the video geographic information system which connects video data obtained by using cameras and geographic information as it is by displaying the obtained video data is being more popular. However, because most existing video geographic information systems consider video data as an attribute of geographic information or use simple one-way links from geographic information to video data to connect video data with geographic information, they support only displaying video data through searching geographic information. In this paper, we design and implement a video geographic information system which connects video data with geographic information and supports hi-directional search; searching geographic information through searching video data and searching video data through searching geographic information. To do this, we 1) propose an ER data model to represent connection information related to video data, geographic information, 2) propose a process to extract and to construct connection information from video data and geographic information, 3) show a component based system architecture to organize the video geographic information system.

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An Efficient Video Retrieval Algorithm Using Key Frame Matching for Video Content Management

  • Kim, Sang Hyun
    • International Journal of Contents
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    • v.12 no.1
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    • pp.1-5
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    • 2016
  • To manipulate large video contents, effective video indexing and retrieval are required. A large number of video indexing and retrieval algorithms have been presented for frame-wise user query or video content query whereas a relatively few video sequence matching algorithms have been proposed for video sequence query. In this paper, we propose an efficient algorithm that extracts key frames using color histograms and matches the video sequences using edge features. To effectively match video sequences with a low computational load, we make use of the key frames extracted by the cumulative measure and the distance between key frames, and compare two sets of key frames using the modified Hausdorff distance. Experimental results with real sequence show that the proposed video sequence matching algorithm using edge features yields the higher accuracy and performance than conventional methods such as histogram difference, Euclidean metric, Battachaya distance, and directed divergence methods.

Server Side Solutions For Web-Based Video

  • Biernacki, Arkadiusz
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.10 no.4
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    • pp.1768-1789
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    • 2016
  • In contemporary video streaming systems based on HTTP protocol, video players at the client side are responsible for adjusting video quality to network conditions and user expectations. However, when multiple video clips are streamed simultaneously, an intricate application logic implemented in the video players overlays the TCP mechanism which is responsible for a balanced access to a shared network link. As a result, some video players may not obtain a fair share of network throughput and may be vulnerable to an unstable video bit-rate. Therefore, we propose to simplify the algorithms implemented in the video players, which are responsible for the adjustment of video quality and constrain their functionality only to sending feedback to a server about a state of the player buffer. The main logic of the system is shifted to the server, which is now responsible for bit-rate selection and prioritisation of the video streams transmitted to multiple clients. To verify our proposition, we performed several experiments in a laboratory environment which show that when the server cooperates with the clients, the video players experience fewer quality switches and the system achieves better fairness when allocating network throughput among the video players. However, this comes at the cost of worse utilisation of network bandwidth.

Video Segmentation and Video Segment Structure for Virtual Navigation

  • Choi, Ji-Hoon;Kim, Seong-Baek;Lee, Seung-Yong;Lee, Jong-Hun
    • Proceedings of the KSRS Conference
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    • 2003.11a
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    • pp.783-785
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    • 2003
  • In recent years, the use of video in GIS is considered to be an important subject and many related studies result in VideoGIS. The virtual navigation is an important function that can be applied to various VideoGIS applications. For virtual navigation by video, the following problems must be solved. 1) Because the video route may be not exactly coincided with route that user wants to navigate, parts of several video clips may be required for single navigation. Virtual navigation should allow the user to move from one video to another at the proper position. We suggest the video segmentation method based on geographic data combined with video. 2) From a point to a destination, the change frequency of video must be minimized. The frequent change of video make user to mislead navigation route and cause the wasteful use of computing resource. We suggest methods that structure video segments and calculate weight value of each node and link.

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Video Browsing and Retrieval System using Structured Logical Video (구조화된 논리적 비디오를 이용한 비디오 브라우징 및 검색 시스템)

  • Kwon, Sung-Bok;Cho, Young-Woo;Kim, Young-Mo
    • The Transactions of the Korea Information Processing Society
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    • v.4 no.6
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    • pp.1443-1452
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    • 1997
  • In this paper, we propose a new video structuring method for reconstructuring a 'structured logical video' which adds logical video information to a conventional structured video. Logical video information is composed of background, object, and situation. The proposed structured video is reconstructed in logical unit like episodes as well as in physical unit like shots. It can support many video functions and may be reusable in many video applications-video browsing, video retrieval, video editing, etc. we also present the video database management system in order to manage the proposed structured video is modeled on object-oriented concept and hierarchical structure. Also, we design and implement a video browsing and retrieval system using the proposed structured video.

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An Efficient Video Retrieval Algorithm Using Luminance Projection

  • Kim, Sang-Hyun
    • Journal of the Korean Data and Information Science Society
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    • v.15 no.4
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    • pp.891-898
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    • 2004
  • An effective video indexing is required to manipulate large video databases. Most algorithms for video indexing have been commonly used histograms, edges, or motion features. In this paper, we propose an efficient algorithm using the luminance projection for video retrieval. To effectively index the video sequences and to reduce the computational complexity, we use the key frames extracted by the cumulative measure, and compare the set of key frames using the modified Hausdorff distance. Experimental results show that the proposed video indexing and video retrieval algorithm yields the higher accuracy and performance than the conventional algorithm.

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Video Cut Detection Using Complementary Color (보색개념을 도입한 Video Cut 검출)

  • 김재학;박종승;한준희
    • Proceedings of the Korean Information Science Society Conference
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    • 1998.10c
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    • pp.411-413
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    • 1998
  • Video영상을 의미있는 부분으로 나누는 Video segmentation을 위해서는 Video Cut의 검출이 필요하다. 본 논문에서는 Video Cut의 검출을 위하여 신경망을 이용하였으며, cut의 측정 방법으로 보색(complementary color)의 개념을 도입하였다. 이 방법을 이용하여, 여러개의 Video data로부터 학습을 한 뒤 새로운 Video에 대해서 테스트한 결과 좋은 성능을 보였다.

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Analyzing Performance of MPEG-7 Video Signature for Video Copy Detection (동영상 복사본 검출을 위한 MPEG-7 Video Signature 성능분석)

  • Yu, Jeongsoo;Ryu, Jaesug;Nang, Jongho
    • KIISE Transactions on Computing Practices
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    • v.20 no.11
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    • pp.586-591
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    • 2014
  • In recent years, we can access to video contents anywhere and at any time. Therefore distributed video is easily copied, transformed and republished. Since it brings copyright problem, similarity/duplicate detection and measurement is essential to identify the excessive content duplication. In this paper, we analysed various discernment of video which has been transformed with various ways using MPEG-7 Video Signature. MPEG-7 Video Signature, one of video copy detection algorithms, is block based abstraction. Thus we assume Video Signature is weak for spatial transform. The experiments show that MPEG-7 Video Signature is very weak for spatial transform which could occur general as we have assumed.