• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2011년도 춘계학술대회
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• pp.447-450
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• 2011

행정기관 VoIP 서비스는 현재 PSTN망과 인터넷망을 활용하여 기존 전화망보다 저렴한 가격에 음성통화를 할 수 있게 해주는 서비스로 확대되고 있다. 하지만 공공의 보안이 유지 되어야 할 행정기관 VoIP의 경우 보안취약성에 대한 문제들이 발생하고, 해커의 공격을 받을 가능성이 높다. 본 논문은 행정기관에서 유 무선 인터넷을 이용하여 VoIP 서비스 이용 시 발생할 수 있는 침해사고 유형을 분석하고 도청 공격을 실시하여 취약점을 분석한다. 행정기관용 Smart Phone으로 VoIP 취약점을 분석을 위하여 OmniPeek와 AirPcap 장비가 설치되어 있는 실험실 환경에서 도청 공격을 실시한 다. 도청 공격에 따르는 Packet을 분석하고, IP을 확인하여 공격에 의한 침해사고로 도청이 이루어짐을 시험으로 증명한다. 본 논문의 연구는 행정기관뿐 아니라 일반사용자의 Smart Phone과 VoIP 서비스 보안성 강화에 기초자료로 제공 될 것이다.

• 디지털산업정보학회논문지
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• 제14권4호
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• pp.117-125
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• 2018

Recently, VoIP technology is widely used in our daily life. Even VoIP has become a technology that can be easily accessed from services such as home phone as well as KakaoTalk.[1] Most of these Internet telephones use the RTP protocol. However, there is a vulnerability that the audio data of users can be intercepted through packet sniffing in the RTP protocol. So we want to create a tool to check the security level of a VoIP network using the RTP protocol. To do so, we capture data packet from and to these VoIP networks. For this purpose, we first configure a virtual VoIP network using Raspberry Pi and show the security vulnerability by applying our developed sniffing tool to the VoIP network. We will then analyze the captured packets and extract meaningful information from the analyzed data using the Google Speech API. Finally, we will address the causes of these vulnerabilities and possible solutions to address them.

• International journal of advanced smart convergence
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• 제11권2호
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• pp.108-117
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• 2022

The recent development of information and communication technology has a great impact on the audio/video industry. In particular, IP-based AoIP transmission technology and AVB technology are making changes in the audio/video market. Video signal transmission technology has been introduced to the market through a network, but it has not replaced the video switcher function. Video signals in the conference room or classroom are still controlled by the switching device. In order to switch input/output video devices, a cable that is not limited by distance must be connected to the switcher. In addition, the control of the switching device must be performed by a person who has received professional training. In this paper, it is a technology that can be operated even by non-experts by replacing complex video cables (RGB, DVI, HDMI, DP) with LAN cables and enabling IP-based video switching and transmission (Video Mirroring over IP: VMoIP) to replace video switcher equipment. We are going to do this study, I/O videos were controlled in the form of matrix and high-definition videos were transmitted without distortion, and VMoIP is expected to become the standard for video switching systems in the future.

• 한국생활과학회지
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• 제15권6호
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• pp.961-971
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• 2006

The purpose of this study was firstly to provide fundamental data on the activation for the IP-based video phone for the special consumer related to the physically handicapped; secondly to inform empirical data for the consumer public policy in the information technology market, specially for the deaf people. The results of study showed that consumer needs extend to not only simple voice communication for general consumers but also special demands for both the handicapped and the elderly. This study also indicated that VoIP's characteristics of technology would be easily applied to the TRS or VRS which can be adapted to the special consumer market so that VoIP service would be optimal technology for the special consumers like the deaf. In order to successfully implement TRS & VRS business, the paper proposed as follows; 1) the provision of VoIP service enable to satisfying consumers in special market such as the deaf market and the elderly market, 2) the necessity of supporting policy by the related law, and 3) the construction of the system inducing interests from the market participants.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2011년도 춘계학술대회
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• pp.769-770
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• 2011

본 논문에서는 정보기술 시스템온칩을 구성하는 방법을 제안하였다. 시스템온칩을 구현하기 위해 설계자는 IP의 재사용을 염두해 두어야 한다. IP 블록은 미리 설계되어지고 검증되기 때문에 설계자는 개별 부품의 올바름과 수행에 대해 거정을 하지 않아도 된다.또한, 정보기술 시스템온침의 임베디드된 코어는 시스템 레벨의 테스트 메카니즘을 호출하여 사용한다. 실제에 있어, IP 블록을 사용하여 조립할 때 아직까지는 error-prone, labor-intensive, time-consuming 과정을 사용한다. 본 논문에서는 시스템온칩 설계자가 IP 블록과 툴을 사용하는 것에 �X점을 맞추었다.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2007년도 춘계학술대회A
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• pp.485-489
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• 2007

Knowledge-based economy is the economy or economic structure based on production, accumulation and utilization of knowledge. With the emergence of knowledge-based economy, the importance to the corporate competitiveness of IP and IP-related activities has increased. This paper discuss the issues related to the mode of IP-related activities, including the comparison of SMEs and large firms. Especially, I focus on the role and impact of IP-related activities on innovation and growth of firm in machinery industry. The result of this study can help to set up strategy for supporting firm's technology innovation.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 1998년도 하계종합학술대회논문집
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• pp.114-117
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• 1998

This paper highlights new IP network design and internetworking scenarios overlayed on the existing ATM technology network. It describes the proper network configurations to solve the IP/ATM internetworking probrems on the AISN(Advanced Information Superhighway Network). The paper outlines that IP network can be constructed on ATM backbone network. The paper looks at how new design technology is to enhance the AISN in Korea. The paper concludes that new IP network design is applied to AISN and there is enough possibility that AISN can be developed to efficient NGI(Next Generation Internet).

• International Journal of Internet, Broadcasting and Communication
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• 제16권2호
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• pp.10-21
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• 2024

Recently, audio systems are changing the configuration of conventional sound reinforcement (SR) systems and public address (PA) systems by using audio over IP (AoIP), a technology that can transmit and receive audio signals based on internet protocol (IP). With the advancement of IP technology, AoIP technologies are leading the audio market and various technologies are being released. In particular, audio networks and control hierarchy over peer-to-peer (Anchor) technology based on AoIP is a system that transmits and receives audio signals over a wide bandwidth without an audio mixer, creating a novel paradigm for existing audio system configurations. Anchor technology forms an audio system by connecting audio sources and output equipment with On-site audio center (OAC), a device that can transmit and receive IP. Anchor's receiving OAC is capable of receiving and mixing audio signals transmitted from different IPs, making it possible to configure a novel audio system by replacing the conventional audio mixer. However, Anchor technology does not have the ability to provide audio effects to input devices such as microphones and instruments in the audio system configuration. Due to this, when individual control of each audio source is required, there is a problem of not being able to control the input signal, and it is impossible to individually affect a specific input signal. In this paper, we implemented a tone control module that can individually control the tone of the audio source of the input device using the audio processor core in the audio system based on Anchor technology, tone control for audio sources is possible through a tone control module connected to the transmitting OAC. As a result of the study, we confirmed that OAC receives the signal from the audio source, adjusts the tone and outputs it on the tone control module. Based on this, it was possible to solve problems that occurred in Anchor technology through transmitting OAC and tone control modules. In the future, we hope that the audio system configuration using Anchor technology will become established as the standard for audio equipment.

• 전자통신동향분석
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• 제24권3호
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• pp.13-23
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• 2009

유선통신망과 이동통신망은 그 동안 개별적으로 발전되어 왔으나 망 운영자의 강한 요구에 따라 차세대 유무선통합망으로 발전하고 있다. 차세대 유무선통합망은 IP 기반의 All-IP 망으로서 사용자는 다양한 액세스 망을 통하여 자유롭게 접속하며, 무선 액세스의 활성화로 고정 사용자보다는 이동 사용자가 주가 되는 망이 될 것으로 전망된다. 이러한 망 환경에서 가장 중요한 요구사항 중의 하나가 다양한 액세스망 간을 이동하는 사용자에 대한 심리스한 서비스 제공이다. 이러한 다양한 이기종 액세스망 간의 이동은 기본적으로 IP 이동성 지원을 필요로 하기 때문에 최근 IP 이동성 지원 기술의 중요성이 커지고 있다. 따라서 IP 기술의 대표적인 기관인 IETF 뿐만 아니라 유선통신망과 이동통신망의 대표적인 표준화 기관인 ITU-T, 3GPP에서도 관련 표준화가 활발히 진행되고 있다. 본 논문은 IP 이동성 지원 기술에 대하여 주요 표준화 기관에서 이루어지고 있는 표준화 동향을 살펴보고 이에 대한 대응방안에 대하여 논한다.

• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송공학회 2015년도 하계학술대회
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• pp.51-53
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• 2015

본 논문은 현재 서비스 시작 단계인 UHDTV 방송 서비스의 확산을 위해서 UHD 콘텐츠 제작 워크플로우에서 우선적으로 요구되는 UHD 콘텐츠의 실시간 획득, 저장을 하고 이를 편집할 수 있는 UHD 콘텐츠 인제스트 및 편집용 비디오 서버 시스템의 설계와 구현 방법에 대해 기술한다. 제안된 UHD 콘텐츠 비디오 서버 시스템은 최대 8K UHD 콘텐츠를 실시간으로 인제스트 및 재생하고, 또한 저장된 콘텐츠를 상용 편집툴과 연동하여 8K 콘텐츠를 편집할 수 있다.