• Journal of Broadcast Engineering
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• v.7 no.3
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• pp.277-284
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• 2002

In recent years, data broadcasting kas been drawing muck attention with glowing importance. In this paper, we implement a DASE middleware which is crucial for the data-ready DTV settop box. The software has been ported to a prototype system and tested with real time broadcasting streams.

• ETRI Journal
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• v.36 no.2
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• pp.271-279
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• 2014

This paper proposes a new broadcasting system for the service-compatible 3DTV in which the 3D service can coexist with the conventional digital TV broadcast. In the proposed system, the commercial 3DTV service can be implemented via the existing DTV channel without utilizing the dedicated 3DTV system. This 2D/3D system interworks with the conventional system and can switch to 2D or 3D service according to the broadcast programming and schedule. The system also provides a mechanism that can prevent the synchronization mismatch between left and right video streams and between the stream and the associated signaling in the 2D/3D transition periods. The picture quality measurements are carried out based on the ITU-R recommended test to check the level of quality of service provided by the proposed scheme. The conformity tests are also performed with the conventional channel and the receiver for the DTV system to confirm the feasibility of the proposed one for the commercial service.

• ETRI Journal
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• v.34 no.1
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• pp.17-23
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• 2012

This paper analyzes the feasibility of a new 3DTV broadcasting service scenario via Advanced Television Systems Committee Mobile/Handheld (ATSC-M/H). We suggest a dual-channel system in which a left-view image is encoded by MPEG-2 with HD quality and a small-sized right-view image is encoded by AVC. Also, the left view is transmitted through ATSC main channel and the right view is transmitted through ATSC-M/H channel. Although the transport stream formats of two channels are different from each other, we demonstrate that it is possible for the ATSC 2.0 decoder to synchronize the display of the left and right views when both encoders use a common wall clock and time stamp. We also propose a program specific information descriptor which guarantees full compatibility with the conventional 2D HDTV and emerging mobile TV services. Finally, we provide the results of subjective visual quality assessment of the proposed system in support of its 3DTV service quality.

• Journal of Broadcast Engineering
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• v.14 no.4
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• pp.518-536
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• 2009

To verify the performance of a Distributed Translator Network(DTxR) system in the real world conditions, 5 legacy DTV broadcasting repeater sites were implemented with 5 DTxR systems and field-tested by the DTV field test truck. The 4 DTV broadcasting repeater sites are selected in congested areas where their service areas are overlapped and the 5th site is deviated from the other sites to examine the effect of long-delayed multipath signals. First of all, we checked the receiving signal of the main station that used as a transmitting signal in 5 DTxR systems on the pre-selected 60 test points and tested every case of a DTxR system's on & off except 1 repeater site due to the already built-in DTV repeater system. The test items are received signal electric field strength, noise margin, ease of reception and subjective evaluation of the picture quality for received signals. We used 3rd, 5th, and 6th generation DTV receivers to examine the differences of the receivability by each generation of DTV receivers. Reviewing the test results, we conclude that the DTxR system can be adopted in the current DTV Repeater sites and it could improve the quality and receivability of the main signals by extending the service areas and enhancing the signal levels in the shadow areas without using the extra broadcasting channels.

• Journal of Broadcast Engineering
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• v.16 no.5
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• pp.750-761
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• 2011

Currently, 3DTV technologies are being developed as the future services of the HD digital broadcast environment. As one of the various research topics to apply 3DTV technologies to the conventional broadcasting network, methods to configure stereoscopic videos are being studied. In this paper, we proposed a method to broadcast high quality stereoscopic videos based on analysis of a method to add a stereoscopic descriptor to the PMT of MPEG-2 transport streams and a method to transmit stereoscopic videos by the expansion of MPEG-C part 3 which are from precedent studies. The proposed technique maintains compatibility with conventional MPEG-2 transport streams by showing only reference video for models that do not support 3D broadcasting. Therefore, the compatibility between conventional broadcasting and stereoscopic videos should make this method useful when activating 3D services in the communications and broadcasting area

• ETRI Journal
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• v.32 no.6
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• pp.961-964
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• 2010

This letter introduces a stereoscopic video broadcasting system that provides 3D visual service and has full backward compatibility with legacy digital television (DTV) service in the same channel capacity. The proposed stereoscopic video broadcasting system in this letter is composed of both a hybrid codec and a multiplexer with a newly defined stereoscopic-related signaling method. In conclusion, the proposed method can be effectively applied for 3D broadcasting services without major changes in legacy broadcasting platforms.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.36 no.9B
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• pp.1126-1142
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• 2011

This paper addresses the stereoscopic 3D broadcasting technology that delivers the 3DTV contents through the digital cable networks. In order to convey the 3D contents via DCA TV network, specifications of 3D video format, compression, multiplexing, signalling and transport are to be developed. Since 3D has some constraints unlike 2D, it is required to be well designed by considering the capacity of the additional view and the backward/forward compatibility. This paper goes with the latest trends of 3D standard, requirements and service scenarios and then covers the 3D format, compression, multiplexing and signaling, service information and transport/reception technologies.

• Electronics and Telecommunications Trends
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• v.26 no.6
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• pp.120-128
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• 2011

3D 영화 아바타에 의해 활성화되기 시작한 3D 콘텐츠 서비스는 영화, 게임, 방송 서비스 등 다양한 분야로 그 범위를 넓혀가고 있다. 특히 3D 방송 서비스는 post-HD 서비스의 선두 주자로서 국내는 물론 유럽, 일본, 미국 등 전 세계적으로 다양한 방식과 형태의 3DTV 실험방송 및 상용 서비스가 활발히 진행되고 있다. 본 고에서는 전 세계적으로 현재까지 이뤄지고 있는 국내외 3DTV 방송 서비스 현황에 대해 알아보기로 한다.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2012.07a
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• pp.323-324
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• 2012

서로 다른 해상도의 좌, 우 영상으로 구성된 3DTV 시스템에서는 낮은 화질의 영상을 높은 화질의 해상도로 확대하여야 한다. 본 논문에서는 3종류의 보간기법을 실험 대상으로 하였으며 부호화기 및 부호화기에 각각 적용한 경우의 PSNR을 기준으로 성능을 분석하였다. 3종류의 보간 기법 중 SVC의 normative upsampling(JVT-R006) 보간기법의 성능이 우수함을 확인 하였다.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.10 no.3
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• pp.61-68
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• 2010

Korea has made a plan to allocate CH 14~CH 51 (470 MHz~698 MHz) for DTV transition. Therefore, It is a necessary to take account compatibility between DTV service and other potential services. This paper assumes that DTV service operates on CH 51(692 MHz~698 MHz) and IMT service operates on CH 52(698 MHz~704 MHz), and then analyzes compatibility between DTV service and IMT service with Spectrum Engineering Advanced Monte Carlo Analysis Tool(SEAMCAT). The interference probability from IMT service to DTV service and capacity loss of IMT service due to interference from DTV service is studied, respectively. For the simulation, four interference cases in four different scenarios are considered. With considering the depolarization factor, a guard band of 8 MHz is required in the case of between IMT service downlink(DL) and DTV service, in the case of between IMT service uplink(UL) and DTV service, a guard band of 6 MHz is needed for the worst case of urban scenario on consideration of more then 15 dB increase of IMT system base station(BS) receiver blocking level.