• Proceedings of the Korean Society of Broadcast Engineers Conference
• /
• 2001.11a
• /
• pp.37-50
• /
• 2001

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.15 no.4
• /
• pp.803-809
• /
• 2011

In this paper, we present a very useful method for updating digital satellite radio broadcast channel information. When a devices equipped with function to receive Digital Satellite Radio such as Home Theater, MP3 player, mobile phones, car audio system and various other types of Digital Devices, receives new Digital satellite radio (will be mentioned as XM radio onwards) broadcast channel information, only the current received XM radio broadcast channel and N number of pre/post nearby broadcast channels are scanned randomly in zigzag manner. Then the previous XM radio broadcast channel information updated with the newly received XM radio broadcast channel information. Since this method can prevent batch update for all XM radio channel, including some channels which less likely did not select by user, update process for real time frequently changed XM radio broadcast channel information can be performed efficiently with minimal or without delay.

• Proceedings of the Korean Society of Broadcast Engineers Conference
• /
• 2011.07a
• /
• pp.53-56
• /
• 2011

최근 3D 입체영상이 핫 이슈로 떠오르면서 관련 업계에서는 여세를 몰아 제품 개발이나 마케팅에 총력을 기울이고 있으며 방송, 영화, 게임 등에 접목하여 차세대 핵심 산업을 견인하고 있다. 특히, Post-HDTV 이후 3DTV 방송은 국내외 표준화 단체를 중심`으로 표준화 및 다양한 3DTV 실험방송 서비스가 활발히 진행되고 있다. 이를 반영하듯, 케이블 및 위성 매체기반의 상용 3DTV 방송이 서비스 중에 있으며 이를 점차 지상파에도 적용하기 위하여 각 지역 방송표준단체는 타 표준단체들과 공조를 통하여 표준화를 진행 중에 있다. 이에, 본 논문에서는 다양한 디지털방송 플랫폼에서 적용이 가능하며 종래의 디지털방송과 호환성을 유지하면서 3DTV 방송서비스를 제공하기 위한 시스템 및 시그널링 방식을 소개한다. 특히, 시그널링 부분은 지상파/케이블/위성 매체에서 스테레오스코픽 비디오를 서비스하기 위하여 공통적으로 적용되는 기술로서 국내에서는 TTA를 중심으로 현재 MPEG 국제 표준화에 참여 중에 있다.

• Aerospace Engineering and Technology
• /
• v.3 no.1
• /
• pp.134-142
• /
• 2004

This is a survey report of Japan's geo-stationary satellite development. Owing to Japanese government's ambitious space development efforts since 1950's, Japan became the fourth country that launched successfully its own satellite by using its own launch vehicle with the launch of Japan's first satellite, Ohsumi, in 1970. Since then Japan is maintaining a world leader's position in space development with continuous technology accumulation. Japan is injected 97 satellites into orbit(third in the world) by the end of 2003 including 18 science satellite series, 7 technology experiment satellite series, 5 meteorological satellites, and numerous telecommunication and broadcasting satellites, etc. With successful delivery of Optus C1 satellite to Sing Tel Optus Pty., Ltd. in Australia in June 2003 by MELCO, Japan is capable of competing in the international geo-stationary satellite market.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.7 no.3
• /
• pp.485-491
• /
• 2003

In this paper, We designed the multi-stage amplifier having high gain/low noise characteristics for terrestial repeater of direct digital satellite broadcasting system. In the design the amplifier, we optimized the parameters to have the stable operation between gain, noise figure and stability. The first stage of amplifier can be specified low noise impedance matching, 2nd stage to 5th stage show constant gain and stable operation and final stage of amplifier shows high gain impedance matching. As a result of experiment at the frequency of digital satellite terrestial, show 68dB gain under 2,4dB noise figure and 63dB dynamic range in the 11.7GHz-12.7GHz frequency range, it is a good agreement of communication channel amplifier requirements for satellite terrestial repeater.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
• /
• v.11 no.4
• /
• pp.544-552
• /
• 2000

In this paper, the microstrip antenna is studied to replace the parabolic antenna in the DBS reception. It is expected that the good picture quality DBS reception will be possible with this antenna irrespective of rain attenuation for the 99.9% time in a monthly average since the C/N ratio f 19dB is proved by the reception experiment of a Koreasat with fabricated antenna. From the results of this paper, it is shown that the electrical characteristics of the microstrip antenna can be improved to the level similar to that of the parabolic antenna. Hence, it is considered that the fabricated microstrip antenna can replace the parabolic antenna in DBS service coverage.

• Proceedings of the Korea Multimedia Society Conference
• /
• 2003.11b
• /
• pp.917-920
• /
• 2003

방송ㆍ통신 융합 서비스 환경으로의 변화에 따라 새로운 형태의 수신 처리 개발이 연구되고 있는데, 본 논문에서는 가정 내에서 IEEE 802.l1b 기반의 무선 홈 네트워크에 접속하면서 DVB 기반 디지털 위성방송을 통해 수신하는 멀티미디어 컨텐츠 처리 기능을 갖는 포터블 양방향위성방송 수신 플랫폼 설계 및 구현에 대해 논한다.

• Proceedings of the Korean Society of Broadcast Engineers Conference
• /
• 2000.11a
• /
• pp.139-148
• /
• 2000

국내 데이터방송 프로토콜 표준안 요약 .국제규격과의 호환성을 유지하기 위해 지상파(ATSC)와 위성(DVB) 규격을 별도로 정함. - 지상파 .T3/S13 : ATSC Data Broadcasting Standard .T3/S8 : PSIP(Program and System Information Protoc이) - 위성 .ETSI SN 301 192 : DVB Specification for Data B Broadcasting .ETSI EN 300 468 : Specification for SI(Service Information) i in DVB Systems 국내 규격 고유의 기능인 한글 처리 부분을 보완 또는 추가함 .

• The Magazine of the IEIE
• /
• v.3 no.2
• /
• pp.36-45
• /
• 1976

오늘날 실시되고 있는 각국의 칼라/흑백 TV 방송의 표준은 잡다한 것 같으나 간추리면 525/60625/50의 2개방식을 NTSC, PAL 및 SECAM의 칼라 3방식으로 채택하고 있다. 한편 통신위성에 의하여 TV방송프로는 국제간에 하시하처에서나 즉시중계가 가능해야하기 때문에 또 앞으로는 방송위성이 등장하게 됨으로 이 표준방식변환(TSC)장치가 꼭 필요하고 매우 중요하게 되었다. 본고에서는 일본 NHK방송센터에 설치된 인터레이스내주사선내압방식 디지털 TSC를 중심으로 TSC의 발달, 표준변환의 원리, 또 여기쓰이는 기억소자로서의 메모리 유형 및 최신의 TSC연구방향으로서 프레임 내주사선내압방식디지털 TSC등을 간약하게 해설하고져 한다.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
• /
• v.20 no.9
• /
• pp.890-899
• /
• 2009

One of major services for the next generation mobile satellite system will be multimedia broadcasting and multi-casting service(MBMS). An integrated satellite and terrestrial network can be considered to provide those services seamlessly and cooperatively. This paper presents efficient cooperative transmission architectures for integrated satellite and terrestrial network. First, an integrated satellite and terrestrial system architectures is introduced, and several cooperative transmission architectures for the integrated system are derived. Extensive performance simulation results reveal that the proposed architectures can improve the system performance and make an efficient transmission.