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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Broadcast Engineering
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Journal DOI :
The Korean Institute of Broadcast and Media Engineers
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Volume & Issues
Volume 14, Issue 6 - Nov 2009
Volume 14, Issue 5 - Sep 2009
Volume 14, Issue 4 - Jul 2009
Volume 14, Issue 3 - May 2009
Volume 14, Issue 2 - Mar 2009
Volume 14, Issue 1 - Jan 2009
Selecting the target year
Transcoding MPEG-2 to H.264/AVC in the GOP Structure Conversion
Lee, Kang-Jun ; Ha, Chang-Woo ; Jeong, Je-Chang ;
Journal of Broadcast Engineering, volume 14, issue 1, 2009, Pages 3~14
DOI : 10.5909/JBE.2009.14.1.3
Currently, H.264/AVC is used in many multimedia applications. Also, The MPEG-2 main profile which supports B pictures for bi-directional motion prediction is widely used in applications such as HDTV and DVD’s. Therefore, transcoding the MPEG-2 main profile to the H.264/AVC baseline is necessary for universal multimedia access. In this transcoding architecture including the GOP structure conversion, the proposed algorithms adopt the adaptive search range selection through the linearity test of a predictive motion vector and adaptive mode selection using the reference region complexity information. The proposed algorithms extremely reduce the computational complexity while maintaining the video quality.
Design and simulation of session synchronization system for Linked Play of Video-on-Demand service in heterogeneous devices
Kim, Seong-Won ; Jung, Moon-Ryul ;
Journal of Broadcast Engineering, volume 14, issue 1, 2009, Pages 15~27
DOI : 10.5909/JBE.2009.14.1.15
As various portable digital devices are developed, the space of the TV audience is expanding. We propose a structure of broadcasting control in VOD service in which viewers can resume the viewing of digital broadcasting contents in different devices after they have stopped the viewing to move to another place. Then we design a session and resource management system of VOD for this control. In particular, we design the session management of each consumer and simulate the seamless VOD connection model.
Fast Mode Decision for H.264/AVC P Slices Using Classification of SKIP Mode Distortion
You, Jong-Min ; Jeong, Je-Chang ;
Journal of Broadcast Engineering, volume 14, issue 1, 2009, Pages 28~35
DOI : 10.5909/JBE.2009.14.1.28
H.264/AVC, a recently developed video compression standard, is used for various applications because of its high coding efficiency. Variable block mode plays important role in the high coding efficiency of H.264/AVC but involves significant computations to select the optimal mode. In this paper, a fast mode decision method for H.264/AVC P slices is presented. To reduce computations for mode decision, the proposed mode decision method skips the mode decision processes for small partition modes using distortions of SKIP mode and intra16x16 mode. The experimental results show that the proposed method can reduce encoding time up to 66.41% while maintaining compression efficiency.
Structural Similarity Based Video Quality Metric using Human Visual System
Park, Jin-Cheol ; Lee, Sang-Hoon ;
Journal of Broadcast Engineering, volume 14, issue 1, 2009, Pages 36~43
DOI : 10.5909/JBE.2009.14.1.36
Recently, the structural similarity (SSIM) index metric is proposed. In the present paper, a new framework, which is called visual SSIM (VSSIM), is proposed by incorporating crucial human factors into the SSIM. The human factors are foveation, luminance, frequency and motion information. The performance of VSSIM is evaluated by subjective quality test compliant with the Video Quality Expert Group (VQEG) multimedia group test plan. It shows that the visual SSIM is more correlated with the subjective quality result than the conventional SSIM.
Efficient Video Streaming Mechanism through a New Rate Adaptation Scheme
Lee, Sun-Hun ; Chung, Kwang-Sue ;
Journal of Broadcast Engineering, volume 14, issue 1, 2009, Pages 44~58
DOI : 10.5909/JBE.2009.14.1.44
To provide efficient video streaming service over a wireless networks, the rate adaptation scheme should be applied at the low layer and the quality adaptation scheme should be considered at the high layer. In this paper, we propose a new cross-layer design which includes rate adaptation scheme at the MAC/PHY layers and quality control at the application layer. Proposed rate adaptation scheme improves the wireless channel utilization by transmitting the consecutive frames and selects optimal transmission mode by calculating the goodputs for each transmission mode. Based on selected transmission mode, the rate adaptation scheme calculates the rate limits and informs that to the application layer. Then the video streaming application utilizes this rate limits to adjust the quality of the video stream. Through performance evaluations, we prove that our cross-layer design improves the quality of the wireless video streaming service by means of the proposed rate adaptation scheme.
Improved Bi-directional Symmetric Prediction Encoding Method for Enhanced Coding Efficiency of B Slices
Jung, Bong-Soo ; Won, Kwan-Hyun ; Jeon, Byeung-Woo ;
Journal of Broadcast Engineering, volume 14, issue 1, 2009, Pages 59~69
DOI : 10.5909/JBE.2009.14.1.59
A bi-directional symmetric prediction technique has been developed to improve coding efficiency of B-slice and to reduce the computational complexity required to estimate two motion vectors. On the contrary to the conventional bi-directional mode which encodes both forward and backward motion vectors, it only encodes a single forward motion vector, and the missing backward motion vector is derived in a symmetric way from the forward motion vector using temporal distance between forward/backward reference frames to and from the current B picture. Since the backward motion vector is derived from the forward motion vector, it can halve the computational complexity for motion estimation, and also reduces motion vector data to encode. This technique always derives the backward motion vector from the forward motion vector, however, there are cases when the forward motion vector is better to be derived from the backward motion vector especially in scene changes. In this paper, we generalize the idea of the symmetric coding with forward motion vector coding, and propose a new symmetric coding with backward motion vector coding and adaptive selection between the conventional symmetric mode and the proposed symmetric mode based on rate-distortion optimization.
New Line Coding of Visible Light Communication System for WPAN
Kim, Jin-Young ; Choi, Jae-Hyuck ; Sang, Cha-Jae ;
Journal of Broadcast Engineering, volume 14, issue 1, 2009, Pages 70~80
DOI : 10.5909/JBE.2009.14.1.70
We propose an ideal line coding for high speed data communication in visible light communication system. B4-HBT line coding is defined as follow. The 1 bit is +V at first though 1 encodes +Voltage and -Voltage doing change of shift each other, then -V newly. V that is been mutually contradictory for 1 bit that exist before that if continuous 0 bits exist 4 here same and reduces mistake because has reverse mark V in 4 continuous last 0 bits and gives half bit variation in 1 bit and made effect of noise low. 2
3 dB profit is seen comparing with line coding that exist in simulation result.
An Analysis of 3-D Object Characteristics Using Locally Linear Embedding
Lee, Soo-Chahn ; Yun, Il-Dong ;
Journal of Broadcast Engineering, volume 14, issue 1, 2009, Pages 81~84
DOI : 10.5909/JBE.2009.14.1.81
This paper explores the possibility of describing objects from the change in the shape according to the change in viewpoint. Specifically, we sample the shapes from various viewpoints of a 3-D model, and apply dimension reduction by locally linear embedding. A low dimensional distribution of points are constructed, and characteristics of the object are described from this distribution. Also, we propose two 3-D retrieval methods by applying the iterative closest point algorithm, and by applying Fourier transform and measuring similarity by modified Housdorff distance, and present experimental results. The proposed method shows that the change of shape according to the change in viewpoint can describe the characteristics of an object.
Stereoscopic Video Services for Terrestrial DMB
Kim, Yong-Han ;
Journal of Broadcast Engineering, volume 14, issue 1, 2009, Pages 85~88
DOI : 10.5909/JBE.2009.14.1.85
Recently "DMB Video-Associated Stereoscopic Data Services" standard has been published by TTA. The standard enables DMB broadcasters to provide 3D or stereoscopic interactive data services based on MPEG-4 BIFS (Binary Format for Scenes). The purpose is to entice viewers to utilize DMB interactive data services more often by providing realistic and protrusive image objects overlaid on top of the main video in the background. This paper provides the background, technical analysis, and in-depth considerations for the standard. Also the results of standard verification are provided including the results of interoperability test with the existing terrestrial DMB receivers.
BBA based Power Scaling Method in Cognitive Radio Technique for WPAN
Kim, Dae-Ik ; Cho, Ju-Phil ; Cha, Jae-Sang ;
Journal of Broadcast Engineering, volume 14, issue 1, 2009, Pages 89~92
DOI : 10.5909/JBE.2009.14.1.89
In this paper, we discuss the BBA based power scaling scheme in cognitive radio technique for WPAN system. We focus on Cognitive Radio environment which is currently ongoing standard procedure and is able to focus on future communication and show the transmitted power scaling of CR user. We suggest the available communication method of CR user, while it is simultaneously satisfying both minimum interference of PU(Primary User) and possible communication of CR user. The method is using the BBA, and we show several merits in face of received SINR. and we prove that CR vary its transmit power while maintaining a guarantee of service to primary users.
An Internet Streaming Service for Digital Cinema Using Motion JPEG2000
Jeong, Dae-Gwon ;
Journal of Broadcast Engineering, volume 14, issue 1, 2009, Pages 93~98
DOI : 10.5909/JBE.2009.14.1.93
While the Motion JPEG2000 has been considered as a unique encoder for digital cinema due to its high quality coding and large screen format, the realization of a digital cinema system and its service cost enormous fund and time. In this paper a digital cinema transmission system with PC and RTP protocol over the Internet is proposed, and showed how tiles of moving images are transmitted, decoded independently and combined to reconstruct and display at a large screen for digital cinema service. The simulation has been carried out for tiles of 128
512, and 1024
1024 pixels. In the experiment, two clients of PC’s received and decoded tiles of video and constructed whole size of moving images successfully. The PSNR’s of the video ranges 30dB to 40dB at compression rate of 160:1 and 30dB to 50dB at and below 16:1, respectively. The result showed a possibility for the reconstruction of video in multi-vision.