• 제어로봇시스템학회:학술대회논문집
• /
• 제어로봇시스템학회 2001년도 ICCAS
• /
• pp.131.1-131
• /
• 2001

At the present time, multimedia chip, internet application, and network equipment is designed by using ARM core. Because it has a good debugging, software compiler and needed low power. We must process a data coding to send a multimedia data by real time. So need to connect software and hardware algorithm. In this research, We design interface for ARM9/AMBA based board using VHDL for these function implementation. The board is used the ARM company´s ARM940T for software function implementation and Xilinx company´s Virtex E2000 for hardware function algorithm. The various hardware algorithm (ME,ME,DCT) block for performance can be implemented on this system.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2004년도 학술대회 논문집 정보 및 제어부문
• /
• pp.86-88
• /
• 2004

As the rapid incensement of the number of internet users has occurred recently, many multimedia application services have been emerging. To improve quality of service, traffic can be suggested to be classified with priority in EPON(Ethernet Passive Optical Network), which is supporting the multimedia application services. In this paper, multimedia application services treat bandwidth classifying device in serving both delay sensitive traffic for real-time audio, video and voice data such as VoIP(Voice over Internet Protocol), and nonreal-time traffic such as BE(Best Effort). With looking through existing mechanisms, new mechanism to improve the quality will be suggested. The delay performances and packet losses of traffic achieved by supporting bandwidth allocation of upstream traffic in suggested mechanism will be analyzed with simulation.

• 한국정보처리학회논문지
• /
• 제3권1호
• /
• pp.9-32
• /
• 1996

본고는 분산 멀티미디어 시스템 환경에서 여러가지 응용 서비스를 지원하기 위한 범용 멀티미디어 데이타 처리 모델을 제시하고 그것을 구현하기 위한 객체지 향, 클 라이언트 서버 구조에 대하여 기술하였다. 이 모델은 분산 멀티미디어 시스템에서 필 요한 원격 데이타의 이용을 위한 통신망 투명성과 실시간 멀티미디어 입출력, 그리고 미디어의 통합이나 동기화 등의 멀티미디어 처리를 지원하는 범용 모델이다. 이 모델 은, 스트립 계층, 멀티미디어 프리젠테이션 계층, 하이퍼 프리젠테이션 계층등으로 구 성된다. 본 고는 이 모델의 각 계층에 해당되는 추상적인 데이타개념을 정의하고 이것 이 각 계층의 서비스와 실재로 객체지향 기법으로 제공되는 AP(Application Programming Interface)가 어떻게 연결되는지 기술하였다. 그리고 실제 구현하기 위한 구체적인 문제 를 예를 들면서 다루었고 마지막에 추후 연구해야 할 방향을 제시하며 결론을 맺었다.

• 전자공학회논문지C
• /
• 제35C권1호
• /
• pp.34-41
• /
• 1998

In this paper, I designed a P1394 serial bus chip as new bus interface architecture which can transmit the multimedia data at the rate of 400 Mbps and guarantee necessary bandwidth. because multimedia data become meaningless data after appropriate time, it is necessary to transfer multimedia data in real time, P1394 serial bus chip designed in this paper support isochronous transfer mode to solve this problem. Also, designed P1394 serial bus chip can transfer high quality video data or high quality audio data because it support the speed of 400 Mbps. While user must set device ID manually in previous interface such as SCSI, device ID is automatically determined if user connect each node with designed P1394 serial bus cable and power on. To design this chip, I verified the behavioral of the entrire system and synthesized layout. Also, I did layout the analog blocks and blocks which must be optimized in full custom.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제13권2호
• /
• pp.929-944
• /
• 2019

Many critical applications require accurate real-time human action recognition. However, there are many hurdles associated with capturing and pre-processing image data, calculating features, and classification because they consume significant resources for both storage and computation. To circumvent these hurdles, this paper presents a recognition machine learning (ML) based system model which uses reduced data structure features by projecting real 3D skeleton modality on virtual 2D space. The MMU VAAC dataset is used to test the proposed ML model. The results show a high accuracy rate of 97.88% which is only slightly lower than the accuracy when using the original 3D modality-based features but with a 75% reduction ratio from using RGB modality. These results motivate implementing the proposed recognition model on an embedded system platform in the future.

• Journal of Communications and Networks
• /
• 제8권4호
• /
• pp.432-441
• /
• 2006

As the community antenna television (CATV) networks becomes ubiquitous, instead of constructing an entirely new broadband network infrastructure, it has emerged as one of the rapid and economic technologies to interconnecting heterogeneous network to provide broadband access to subscribers. How to support ubiquitous real-time multimedia applications, especially in a heavy traffic environment, becomes a critical issue in modern CATV networks. In this paper, we propose a time guaranteed and efficient upstream minislots allocation algorithm for supporting quality-of-service (QoS) traffic over data over cable service interface specification (DOCSIS) CATV networks to fulfill the needs of realtime interactive services, such as video telephony, video on demand (VOD), distance learning, and so on. The proposed adaptive fast expansion algorithm and the loading statistics with dynamic swapping algorithm have been shown to perform better than that of the multimedia cable network system (MCNS) DOCSIS.

• Journal of Multimedia Information System
• /
• 제6권1호
• /
• pp.37-42
• /
• 2019

Skyline queries are used in a variety of fields to make optimal decisions. However, as the volume of data and the dimension of the data increase, the number of skyline points increases with the amount of time it takes to discover them. Mainly, because the number of skylines is essential in many real-life applications, various studies have been proposed. However, previous researches have used the k-parameter methods such as top-k and k-means to discover representative skyline points (RSPs) from entire skyline point set, resulting in high query response time and reduced representativeness due to k dependency. To solve this problem, we propose a new Connected Component Clustering based Representative Skyline Query (3CRS) that can discover RSP quickly even in high-dimensional data through connected component clustering. 3CRS performs fast discovery and clustering of skylines through hash indexes and connected components and selects RSPs from each cluster. This paper proves the superiority of the proposed method by comparing it with representative skyline queries using k-means and DBSCAN with the real-world dataset.

• 한국인터넷방송통신학회논문지
• /
• 제15권2호
• /
• pp.57-63
• /
• 2015

멀티미디어 시대에 들어서면서 고속의 무압축 영상 정보 전송의 요구가 증가하고 있다. 그동안 영상 정보는 전송하기 전에 데이터량을 줄이기 위해서 압축하여 전송하였고, 수신 후 다시 압축을 해제하는 과정에서 프로세싱 지연이 있었다. 그러나 본 논문에서는 실시간 멀티미디어 컨텐츠 전송용 60 GHz 대 무선 송수신 시스템을 제작하였고, 실내에서 20 m 떨어진 거리에서 4 Gbps의 전송속도로 Full HD급의 영상을 무압축하여 성공적으로 송수신하였다. 따라서 개발한 송수신 시스템으로 원격지의 카메라 영상 또는 스마트 폰 멀티미디어 콘텐츠를 무압축하여 실시간으로 대화면에 무선으로 전송할 수 있게 되었다.

• 한국정보통신학회:학술대회논문집
• /
• 한국해양정보통신학회 2001년도 춘계종합학술대회
• /
• pp.378-382
• /
• 2001

인터넷 방송 등의 서비스를 제공하는 서버 시스템 등에서 사용자 수가 증가함에 따라 서비스 질이 저하된다거나 네트워크의 폭주로 인하여 실시간성 상실 및 데이터 손실이 발생할 수 있다. 또한. 인터넷 방송 등과 같이 네트워크를 통해서 압축 부호화된 영상이나 음성 데이터를 전송하는 경우, 일반적인 multicast 방식으로는 신뢰성 있는 데이터 전송을 보장할 수 없다는 문제점이 있다. 이를 극복하기 위하여 사용자 수의 증가에 대하여 서버가 크게 영향을 받지 않도록 하는 방법과, 다양한 사용자의 네트워크 상황을 고려하는 지능적인 데이터 송신 기술이 요구된다. 본 논문에서는 다수 이용자를 지원하는 인터넷 방송과 같은 응용에서 신뢰성있는 실시간 영상 및 음성 데이터 전달을 위하여, reliable multicast를 사용하여 전송 오류가 없도록 하고, 네트워크 환경에 따른 사용자별 adaptive encoding을 통해 다양한 네트워크 환경에 동적으로 적응하여 서비스의 질을 향상시키며, 비슷한 접속 속도의 사용자들을 그룹화하여 사용자 수의 증가에 대한 서버의 부하를 줄이는 서버 구현 방법을 제안한다.

• 한국멀티미디어학회논문지
• /
• 제7권6호
• /
• pp.814-823
• /
• 2004

Current video games and game room games are played as a single player mode on the basis of various emulators. With the evolution of data communications and game technology, a new trend in the game industry has made the primary interests of game developers and companies in the game industry be moved toward a multiplayer mode from the traditional single player mode. In this paper, we represent how to implement a network game platform by allowing network modules to be run in conjunction with the current video emulator games. It also suggests a synchronization scheme for real-time game playout and practical mechanism that can support network games to be played with the Peer-to-Peer process using a lobby system.