• 방송공학회논문지
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• 제13권1호
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• pp.119-127
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• 2008

Transmission of video over Internet or wireless network requires coded stream capable of adapting to dynamic network conditions instantly. To meet this requirement, various scalable video coding schemes have been developed, among which the Scalable Video Coding (SVC) extension of the H.264/AVC is the most recent one. In comparison with the scalable profiles of previous video coding standards, the SVC achieves significant improvement on coding efficiency performance. For adapting to dynamic network bandwidth, the SVC employs inter-layer switching between different temporal, spatial or/and fidelity layers, which is currently supported with instantaneous decoding refresh (IDR) access unit. However, for real-time adaptability, the SVC has to frequently employ the IDR picture, which dramatically decreases the coding efficiency. Therefore, an extension of SP picture from the AVC to the SVC for an efficient inter-layer switching is investigated and presented in this paper. Simulations regarding the adaptability to dynamic network bandwidth are implemented. Results of experiment show that the SP picture added SVC provides an average 1.2 dB PSNR enhancement over the current SVC while providing similar adaptive functionality.

• 대한임베디드공학회논문지
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• 제3권4호
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• pp.175-181
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• 2008

This paper describes the SVC-based media adaptation system which can adapt video contents optimally to various consumption environments in an IP-based transmission scenario. As key technologies, we will present scalable video coding, SVC-based adaptive media transmission, and SVC-based adaptation signaling technology.

• Journal of information and communication convergence engineering
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• 제8권1호
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• pp.71-76
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• 2010

Scalable video coding (SVC) has been standardized as an extension of the H.264/AVC standard. SVC allows straightforward adaptation of video streams by providing layered bit streams. In this paper, we propose a SVC video-based multicasting system preserving scalable security which is able to provide a SVC video service while maintaining information security. In order to maintain information security between a server and a client during all transmission time, the proposed system immediately performs a packet filtering process without decoding with respect to encrypted data received in a routing device, thereby reducing an amount of calculations and latency.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제6권1호
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• pp.379-394
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• 2012

The ever-increasing demand for H.264 scalable video coding (H.264/SVC) distribution motivates researchers to devise ways to enhance the quality of video delivered on the Internet. Furthermore, researchers and practitioners in general depend on computer simulators to analyze or evaluate their designed network architecture or proposed protocols. Therefore, a complete toolset, which is called myEvalSVC, for evaluating the delivered quality of H.264/SVC transmissions in a simulated environment is proposed to help the network and video coding research communities. The toolset is based on the H.264 Scalable Video coding streaming Evaluation Framework (SVEF) and extended to connect to the NS2 simulator. With this combination, people who work on video coding can simulate the effects of a more realistic network on video sequences resulting from their coding schemes, while people who work on network technology can evaluate the impact of real video streams on the proposed network architecture or protocols. To demonstrate the usefulness of the proposed new toolset, examples of H.264/SVC transmissions over 802.11 and 802.11e are provided.

• ETRI Journal
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• 제30권3호
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• pp.441-450
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• 2008

The scalable extension of H.264, known as scalable video coding (SVC) has been the main focus of the Joint Video Team's work and was finalized at the end of 2007. Synchronization between media is an important aspect in the design of a scalable video streaming system. This paper proposes an efficient media synchronization mechanism for SVC video transport over IP networks. To support synchronization between video and audio bitstreams transported over IP networks, a real-time transport protocol/RTP control protocol (RTP/RTCP) suite is usually employed. To provide an efficient mechanism for media synchronization between SVC video and audio, we suggest an efficient RTP packetization mode for inter-layer synchronization within SVC video and propose a computationally efficient RTCP packet processing method for inter-media synchronization. By adopting the computationally simple RTCP packet processing, we do not need to process every RTCP sender report packet for inter-media synchronization. We demonstrate the effectiveness of the proposed mechanism by comparing its performance with that of the conventional method.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2007년도 추계종합학술대회
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• pp.123-126
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• 2007

본 논문에서는 고품질-DMB(Advanced Terrestrial-DMB) 비디오 서비스를 제공하기 위해 SVC(Scalable Video Coding) 부호화기법을 다룬다. SVC 기저계층으로 T-DMB 서비스와 호환이 되도록 하면서, 향상계층은 공간 확장성을 통하여 AT-DMB 비디오 서비스를 제공할 수 있다. 그러나 SVC 부호화 기법은 매우 복잡하므로, 이를 구현하기 위해서는 SVC 부호화하기의 복잡도에 따른 성능을 분석이 필요하다. 본 논문에서는 SVC 부호화 파라미터에 따른 성능 변화를 조사하고, 이를 기반으로 3가지 부호화기 모델에 따른 복잡도 및 성능 특성을 모의실험을 통하여 비교 분석한다.

• 한국정보통신학회논문지
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• 제11권11호
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• pp.2015-2020
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• 2007

본 논문에서는 고품질-DMB(Advanced Terrestrial-DMB) 비디오 서비스를 제공하기 위해 SVC(Scalable Video Coding) 부호화기 법을 다룬다. SVC 기저계층으로 T-DMB 서비스와 호환이 되도록 하면서, 향상계층은 공간 확장성을 통하여 AT-DMB 비디오 서비스를 제공할 수 있다. 그러나 SVC 부호화 기법은 매우 복잡하므로, 이를 구현하기 위해서는 SVC 부호화기의 복잡도에 따른 성능 분석이 필요하다. 본 논문에서는 SVC 부호화 파라미터에 따른 성능 변화를 조사하고, 이를 기반으로 3가지 부호화기 모델에 따른 복잡도 및 성능 특성을 모의실험을 통하여 비교 분석한다.

• 방송공학회논문지
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• 제10권4호통권29호
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• pp.515-527
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• 2005

앞으로의 동영상의 부호화 방법은 압축효율을 최대화시키는 것뿐 만 아니라 다양한 단말기 및 변화하는 통신 환경에 친화적으로 대응할 수 있는 Scalable Video Codec으로 발전해야 한다. 이러한 요구에 부응하여 ISO/IEC와 ITU-T의 합작 팀인 JVT(Joint Video Team)에서 H.264기반 스케일러블 비디오 부호화(SVC : Scalable Video Coding)에 관한 표준화가 진행 중이다. 본 논문에서는 현재 표준화 진행 중인 H.264/AVC기반 SVC의 연구 방향 및 표준화 진행 현황을 소개하고 그 기술을 분석한다.

• 방송공학회논문지
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• 제18권2호
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• pp.249-260
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• 2013

고해상도의 고품질 비디오 서비스가 보편화됨에 따라 최근 초고해상도(UHD) 비디오 부호화를 위한 HEVC(High Efficiency Video Coding) 표준이 마무리되었으며, 향후 융합환경에서 HD 및 UHD 비디오를 동시에 제공하기 위한 스케일러블 확장 HEVC 표준화도 진행되고 있다. 본 논문에서는 UHD/HD 비디오를 동시에 제공하기 위한 H.264/SVC의 확장 부호화 기법을 제시한다. 즉, HEVC의 대표적인 부호화 툴인 Large Block 개념을 H.264/SVC에 적용함으로써 계층간 예측 및 신택스 부호화 등의 부호화 효율성을 개선한 부호화 기법을 제시하고 그 부호화 성능을 분석한다. 실험결과 Large Block을 적용한 SVC가 기존의 H.264/SVC에 비하여 평균 4.53% 내외의 비트 감소의 이득이 있음을 확인하였다.

• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송공학회 2009년도 IWAIT
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• pp.23-27
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• 2009

A scalable video coding (SVC) extension to the H.264/AVC standard has been developed by the Joint Video Team (JVT). SVC provides spatial, temporal and quality scalability with high coding efficiency and low complexity. SVC is now developing the extension of the first version including color format scalability. The paper proposes to remove some luminance related header and luminance coefficients when an enhancement layer adds only additional color information to its lower layer. Experimental results shows 0.6 dB PSNR gain on average in coding efficiency compared with an approach using the existing SVC standard.