• Title/Summary/Keyword: Stereoscopic video coding

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Stereoscopic Video Coding for Subway Accident Monitoring System (지하철 사고 감시를 위한 스테레오 비디오 부호화 기법)

  • Kim Gil-Dong;Park Sung-Hyuk;Lee Hanmin;Oh Seh-Chan
    • Journal of the Korean Society for Railway
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    • v.8 no.6 s.31
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    • pp.559-565
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    • 2005
  • In this paper, we propose a stereoscopic video coding scheme for subway accident monitoring system. The proposed designed for providing flexible video among various displays, such ass control center, station employees and train driver. We uses MPEG-2 standard for coding the left-view sequence and IBMDC coding scheme predicts matching block by interpolating both motion and disparity predicted macroblocks. To provide efficient stereoscopic video service, we define both temporally and spatially scalable layers for each eye's-view by using the concept of Spatio-Temporal scalability. The experimental results show the efficiency of proposed coding scheme by comparison with already known methods and the advantages of disparity estimation in terms of scalability overhead. According to the experimental results, we expect the proposed functionalities will play a key role in establishing highly flexible stereoscopic video codec for ubiquitous display environment where devices and network connections are heterogeneous.

Disparity-Compensated Stereoscopic Video Coding Using the MAC in MPEG-4

  • Cho, Suk-Hee;Yun, Kug-Jin;Ahn, Chung-Hyun;Lee, Soo-In
    • ETRI Journal
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    • v.27 no.3
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    • pp.326-329
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    • 2005
  • The MPEG-4 multiple auxiliary component (MAC) is a good mechanism to achieve one-stream stereoscopic video coding. However, there is no syntax or semantics for the residual texture data of the disparity-compensated image in the current MAC. Therefore, we propose a novel disparity-compensated coding method using the MAC for stereoscopic video. We also define a novel MAC semantics in MPEG-4 so as to support the proposed coding algorithm. The major difference between the existing and proposed coding methods using the MAC is the addition of the residual texture coding.

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Application of Adaptive Loop Filter for NRT-Based Stereoscopic Video Coding (비실시간 기반 스테레오스코픽 비디오 부호화를 위한 적응루프필터 적용기법)

  • Lee, Byung-Tak;Lee, BongHo;Choi, Haechul;Kim, Jin-Soo;Yun, Kugjin;Cheong, Won-Sik;Kim, Jae-Gon
    • Journal of Broadcast Engineering
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    • v.18 no.2
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    • pp.261-270
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    • 2013
  • A stereoscopic 3D video service is able to provide a 3D video service while keeping backward compatibility with the existing 2D video service. In the terrestrial digital television (DTV) system, a stereoscopic video codec is required to have high coding efficiency in order to provide a 3D video service in the same channel capacity. A hybrid codec consisting of MPEG-2 for base video and H.264/AVC or HEVC for 3D auxiliary video is considered. Furthermore, Non-Real-Time (NRT) delivery of stereoscopic video is also considered as a service scenario for 3DTV services to overcome the limited bandwidth. In this paper, we propose a stereoscopic video coding scheme using adaptive loop filter (ALF) which had been considered in HEVC as a pre-/post-filter for enhancing coding efficiency in NRT-based 3DTV services. In order to apply ALF as a post-filter to the reconstructed additional view coded by H.264/AVC, we devise a method in which ALF is adaptively applied based on a structure determined by using macroblock (MB) coding information such as MB mode type and reference index instead of coding unit (CU) structure on which ALF is applied in the HEVC. Experimental results shows that the proposed stereoscopic video coding scheme applying ALF obtains up to 24.9% gain of bit saving.

Adaptive Pre-/Post-Filters for NRT-Based Stereoscopic Video Coding

  • Lee, Byung-Tak;Lee, BongHo;Choi, Haechul;Kim, Jin-Soo;Yun, Kugjin;Cheong, Won-Sik;Kim, Jae-Gon
    • ETRI Journal
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    • v.34 no.5
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    • pp.666-673
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    • 2012
  • Non-real-time delivery of stereoscopic video has been considered as a service scenario for 3DTV to overcome the limited bandwidth in the terrestrial digital television system. A hybrid codec combining MPEG-2 and H.264/AVC has been suggested for the compression of stereoscopic video for 3DTV. In this paper, we propose a stereoscopic video coding scheme using adaptive pre-/post-filters (APPF) to improve the quality of 3D video while retaining compatibility with legacy video coding standards. The APPF are applied adaptively to blocks of various sizes determined by the macroblock coding mode and reference frame index. Experiment results show that the proposed method achieves up to 24.86% bit rate savings relative to a hybrid codec of MPEG-2 and H.264/AVC including the inter-view prediction.

Stereoscopic Video Coding for Subway Accident Monitoring System (지하철 사고 감시를 위한 스테레오 비디오 부호화 기법)

  • Oh, Seh-Chan;Kim, Gil-Dong;Park, Sung-Hyuk
    • Proceedings of the KIEE Conference
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    • 2005.10b
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    • pp.484-486
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    • 2005
  • Passenger safety is a primary concern of railway system but, it has been urgent issue that dozens of people are killed every year when they falloff from train platforms. Recently, advancements in IT have enabled applying vision sensors to railway environments, such as CCTV and stereo camera sensors. In this paper, we propose a stereoscopic video coding scheme for subway accident monitoring system. The proposed scheme is designed for providing flexible video among various displays, such as control center, station employees and train driver. We uses MPEG-2 standard for coding the left-view sequence and IBMDC for predicting the P- and B-types of frames of the right-view sequence. IBMDC predicts matching block by interpolating both motion and disparity predicted macroblocks. To provide efficient stereoscopic video service. we define both temporally and spatially scalable layers for each eye's-view by using the concept of Spatio-Temporal scalability. According to the experimental results. we expect the proposed functionalities will play a key role in establishing highly flexible stereoscopic video codec for ubiquitous display environment where devices and network connections are heterogeneous.

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An Efficient Coding Method for Stereoscopic Videos using HEVC (HEVC를 이용한 양안식 영상의 효율적인 부호화 방법)

  • Hwang, Soo-Jin;Ho, Yo-Sung
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.36 no.12C
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    • pp.721-726
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    • 2011
  • The compression performance of HEVC (high efficiency video coding) is improved 40%, compared to H.264/AVC. Since the existing 3D video CODEC is based on H.264/AVC or MPEG-2, we can improve the compression performance when we use the proposed stereoscopic video coding method based on HEVC. Since the stereoscopic video has the temporal and inter-view correlations, the videos of the left and right cameras encode together to improve the performance. Especially, we implemented the proposed technique using HM(HEVC test model) 3.4. To compare the performance of the proposed method, we only compare the right view video which is coded using the inter-view prediction. The proposed method which is considered inter-view correlation is improved the performance which BDBR reduce about 36.24% and BDPSNR increase approximately 1.19 dB compared to the separated-coding method.

Stereoscopic Video Coding Using MPEG-4 Multiple Auxiliary Component (MPEG-4 MAC(Multiple Auxiliary Component) 기반 스테레오스코픽 비디오 부호화)

  • 조숙희;윤국진;안충현
    • Proceedings of the IEEK Conference
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    • 2003.11a
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    • pp.167-170
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    • 2003
  • We propose stereoscopic video coding method using the syntax of MAC(Multiple auxiliary component) that was added to the MPEC-4 visual version 2 in order to describe the transparency of the video object. We also define the novel MAC's semantics in MPEG-4 that should support the proposed coding method. The major difference between the existing coding method and the proposed coding method is the addition of the residual texture coding. The proposed coding method assigns disparity map and residual texture to 3 components of MAC: one component for disparity map and the rest 2 components fer the luminance and chrominance data of the residual texture, respectively. The performance of the proposed method is evaluated in terms of PSNR by computer simulations.

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Scalable Stereoscopic Video Coding for Heterogeneous Environments (이질적인 환경을 위한 스케러블 스테레오 영상 부호화)

  • 오세찬;이영호;우운택
    • Journal of Broadcast Engineering
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    • v.9 no.3
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    • pp.225-235
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    • 2004
  • In this paper, we propose a new stereoscopic video coding approach for heterogeneous consumer devices by exploiting the concept of spatio-temporal scalability. The proposed method uses MPEG-2 standard for coding the left or main sequence and an enhanced compatible coding scheme for predicting the P- and B-type of frames of the right or auxiliary sequence. The enhanced compatible coding scheme predicts matching block by interpolating both two forward and backward motion predicted macroblocks and disparity predicted macroblock. To provide flexible stereo video service, we define both a temporally scalable layer and a spatially scalable layer for each eye-view. The experimental results show the efficiency of proposed coding scheme by comparison with already known methods and the advantages of disparity estimation in terms of scalability overhead. According to the experimental results, we expect the proposed functionalities will play a key role in establishing highly flexible stereo video service for ubiquitous computing environment where devices and network connections are heterogeneous.

Object-based Stereoscopic Video Coding Using Image Segmentation and Prediction (영역분할 및 예측을 통한 객체기반 스테레오 동영상 부호화)

  • 권순규;배태면;한규필;정의윤;하영호
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.24 no.12B
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    • pp.2349-2358
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    • 1999
  • Object-based stereoscopic video coding scheme is presented in this paper. In conventional BMA based stereoscopic video coding for low bit rate transmission, image prediction errors such as block artifacts and mosquito phenomena are occurred. In order to reduce these errors, object based coding scheme is adopted. The proposed scheme consists of preprocessing, object extraction, and object update procedures. The preprocessing procedure extracts non-object regions having low reliability for motion and disparity estimation. This procedure prohibits extracting inaccurate objects. For the better prediction of left channel image, the disparity information is added to the object extraction. And the proposed algorithm can reduce the accumulated error through the object update procedure that detects newly emerging objects, merges objects that have the same object-disparity and object motion, and splits object which has large image prediction error. The experimental results show that the proposed algorithms improve the quality of the prediction without block artifacts and mosquito phenomena.

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Coding Technology for Strereoscopic 3D Broadcasting (스테레오 3D 방송을 위한 비디오 부호화 기술)

  • Choe, Byeong-Ho;Kim, Yong-Hwan;Kim, Je-U;Park, Ji-Ho
    • Broadcasting and Media Magazine
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    • v.15 no.1
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    • pp.24-36
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    • 2010
  • Nowadays, digital broadcasting providers have plan to extend their service area to 3D broadcasting without exchanging conventional system and equipments. The maintenance of backward compatibility to conventional 2D broadcasting system is very importance issue on digital broadcasting. To satisfy the requirement, highly-optimized MPEG-2 video encoder is essential for coding left-view and new video coding techniques having higher performance than MPEG-4 AVC/H.264 is needed for right-view since terrestrial broadcasting system has very limited and fixed bandwidth. In this paper, conventional video coding algorithms and new video coding algorithms are analyzed to present a capable solution for the best quality stereoscopic 3D broadcasting keeping backward compatibility within the bandwidth.