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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 17, Issue 6 - Nov 2012
Volume 17, Issue 5 - Sep 2012
Volume 17, Issue 4 - Jul 2012
Volume 17, Issue 3 - May 2012
Volume 17, Issue 2 - Mar 2012
Volume 17, Issue 1 - Jan 2012
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Transformation of Stereoscopic Images for 3D Perception Improvement
Gil, Jong In ; Choi, Hwang Kyu ; Kim, Manbae ;
Journal of Broadcast Engineering, volume 17, issue 6, 2012, Pages 911~923
DOI : 10.5909/JBE.2012.17.6.911
Recently, 3DTV and 3D displays have been released in the market. Accordingly, the production of stereoscopic images has gained much interest. Stereoscopic image being composed of left and right images are currently delivered to viewers without any modifications. The researches on the enhancement of depth perception using high-frequency components and the re-production of natural color by color compensation have been carried out for 2D images. The application of such 2D technologies to 3D stereoscopic images is an aim of this paper. This paper proposes the enhancement of 3D perception by color transformation. For this, we propose a stereo matching method for obtaining a depth map and two color transformation methods such as contrast transformation and background darkening. The effectiveness of the proposed method was verified through experiments.
Efficient Primary-Ambient Decomposition Algorithm for Audio Upmix
Baek, Yong-Hyun ; Jeon, Se-Woon ; Lee, Seok-Pil ; Park, Young-Cheol ;
Journal of Broadcast Engineering, volume 17, issue 6, 2012, Pages 924~932
DOI : 10.5909/JBE.2012.17.6.924
Decomposition of a stereo signal into the primary and ambient components is a key step to the stereo upmix and it is often based on the principal component analysis (PCA). However, major shortcoming of the PCA-based method is that accuracy of the decomposed components is dependent on both the primary-to-ambient power ratio (PAR) and the panning angle. Previously, a modified PCA was suggested to solve the PAR-dependent problem. However, its performance is still dependent on the panning angle of the primary signal. In this paper, we proposed a new PCA-based primary-ambient decomposition algorithm whose performance is not affected by the PAR as well as the panning angle. The proposed algorithm finds scale factors based on a criterion that is set to preserve the powers of the mixed components, so that the original primary and ambient powers are correctly retrieved. Simulation results are presented to show the effectiveness of the proposed algorithm.
Depth Map Upsampling with Improved Sharpness
Jang, Seungeun ; Lee, Dongwoo ; Kim, Sung-Yeol ; Choi, Hwang Kyu ; Kim, Manbae ;
Journal of Broadcast Engineering, volume 17, issue 6, 2012, Pages 933~944
DOI : 10.5909/JBE.2012.17.6.933
In this paper, we propose a new method to convert a low-resolution depth map into its high-resolution one called distance transform-based bilateral upsampling. Since the proposed method controls the spatial domain weighting function based on distance transform values of the depth map, it increases the input depth map resolution while preserving edge sharpness. The proposed method is composed of three main steps: distance transform, spatial weighting control, and image interpolation. Experimental results show that our method outperforms the conventional bilateral upsampling in terms of the quality of output depth maps.
High Resolution Depth-map Estimation in Real-time using Efficient Multi-threading
Cho, Chil-Suk ; Jun, Ji-In ; Choo, Hyon-Gon ; Park, Jong-Il ;
Journal of Broadcast Engineering, volume 17, issue 6, 2012, Pages 945~953
DOI : 10.5909/JBE.2012.17.6.945
A depth map can be obtained by projecting/capturing patterns of stripes using a projector-camera system and analyzing the geometric relationship between the projected patterns and the captured patterns. This is usually called structured light technique. In this paper, we propose a new multi-threading scheme for accelerating a conventional structured light technique. On CPUs and GPUs, multi-threading can be implemented by using OpenMP and CUDA, respectively. However, the problem is that their performance changes according to the computational conditions of partial processes of a structured light technique. In other words, OpenMP (using multiple CPUs) outperformed CUDA (using multiple GPUs) in partial processes such as pattern decoding and depth estimation. In contrast, CUDA outperformed OpenMP in partial processes such as rectification and pattern segmentation. Therefore, we carefully analyze the computational conditions where each outperforms the other and do use the better one in the related conditions. As a result, the proposed method can estimate a depth map in a speed of over 25 fps on
Multiple Candidate Matching Pursuit
Kwon, Seokbeop ; Shim, Byonghyo ;
Journal of Broadcast Engineering, volume 17, issue 6, 2012, Pages 954~963
DOI : 10.5909/JBE.2012.17.6.954
As a greedy algorithm reconstructing the sparse signal from underdetermined system, orthogonal matching pursuit (OMP) algorithm has received much attention. In this paper, we multiple candidate matching pursuit (MuCaMP), which builds up candidate support set in every iteration and uses the minimum residual at last iteration. Using the restricted isometry property (RIP), we derive the sufficient condition for MuCaMP to recover the sparse signal exactly. The MuCaMP guarantees to reconstruct the K-sparse signal when the sensing matrix satisfies the RIP constant
. In addition, we show a recovery performance both noiseless and noisy measurements.
System Implementation for Generating High Quality Digital Holographic Video using Vertical Rig based on Depth+RGB Camera
Koo, Ja-Myung ; Lee, Yoon-Hyuk ; Seo, Young-Ho ; Kim, Dong-Wook ;
Journal of Broadcast Engineering, volume 17, issue 6, 2012, Pages 964~975
DOI : 10.5909/JBE.2012.17.6.964
Recently the attention on digital hologram that is regarded as to be the final goal of the 3-dimensional video technology has been increased. A digital hologram can be generated with a depth and a RGB image. We proposed a new system to capture RGB and depth images and to convert them to digital holograms. First a new cold mirror was designed and produced. It has the different transmittance ratio against various wave length and can provide the same view and focal point to the cameras. After correcting various distortions with the camera system, the different resolution between depth and RGB images was adjusted. The interested object was extracted by using the depth information. Finally a digital hologram was generated with the computer generated hologram (CGH) algorithm. All algorithms were implemented with C/C++/CUDA and integrated in LabView environment. A hologram was calculated in the general-purpose computing on graphics processing unit (GPGPU) for high-speed operation. We identified that the visual quality of the hologram produced by the proposed system is better than the previous one.
Efficient Motion Prediction Architecture and Design of DPB for Scalable Multi-view Video Coding
Kim, Ji-Hoon ; Jung, Tae-Jun ; Lee, Hong-Rae ; Seo, Kwang-Deok ; Kim, Jin-Soo ; Lee, Hahyun ; Kang, Jung Won ;
Journal of Broadcast Engineering, volume 17, issue 6, 2012, Pages 976~989
DOI : 10.5909/JBE.2012.17.6.976
In this paper, we propose an efficient motion prediction architecture and DPB design mechanism for scalable multi-view video coding which is implemented by integrating SVC and MVC coding algorithms. In the proposed motion prediction architecture, we employ pictures associated with other views as a candidate for reference picture for improved motion prediction performance. By the proposed prediction architecture, we could enormously reduce the size of compressed video data. When performing scalable multi-view video coding, an integrated DPB design mechanism is also proposed. It is shown by various simulations that the proposed motion prediction architecture for scalable multi-view video coding can result in reduced data size in the compressed bitstream.
A Study on the AM/FM Digital Radio for Practical Use Based on DRM and DRM+
Park, Sung-Kyu ; Park, Goo-Man ;
Journal of Broadcast Engineering, volume 17, issue 6, 2012, Pages 990~1003
DOI : 10.5909/JBE.2012.17.6.990
In this paper, the possibility and necessity of the digital broadcasting propulsion in AM and FM is presented based on DRM and DRM+ transmission modes, They are the members of series technological family in digital radio development. As the frequency utilization, the application of DRM+ is flexible in any mode such as IN-BAND or OUT-OF-BAND. When the digital audio broadcasting is planned at LOW-VHF bandwidth such as TV channel No.5 and NO.6 being adjacent to FM band and OUT-Of-BAND DRM+ technology is applied, there is no collision and jamming. Particularly, in the IN-BAND Hybrid mode, it is mentioned that there was the difficulty problem for multiple SFN transmitters uses. Not like the IN-BAND mode the OUT-OF-BAND mode lets multiple transmitters, because neighbor transmitters do not interfere each other. Digital transmitter can be combined with the existing FM transmitter. The intensity of power and size of area can be easily determined according to local broadcasters' condition. And the OUT-OF-BAND mode is advantageous for AM/FM integration in digital radio receiver manufacturing, which makes the conversion schedule much shorter.
Influence of Gaming Display and Wearing Glasses on Perceived Characteristics, Presence, and Fatigue
Lee, Hyunji ; Chung, Donghun ;
Journal of Broadcast Engineering, volume 17, issue 6, 2012, Pages 1004~1013
DOI : 10.5909/JBE.2012.17.6.1004
3D images and videos are required viewers to wear 3D glasses. According to the data, about half of Korean people wear glasses or contact lens and this implies 3D video viewers may have a trouble due to putting a pair of 3D glasses atop their glasses. The purpose of this study is to examine gamers' perceived characteristics, presence, and fatigue according to video gaming display (2D vs. 3D) and glasses whether wearing or not. The results show that the interaction effect of the display and wearing glasses was statistically significant in the perceived presence, and the main effect of the display was statistically significant in the perceived characteristics and fatigue.
Slide-show of Panoramic Image through a Secondary Device by using MPEG-4 LASeR PMSI
Park, Yongchul ; Kim, Kyuheon ;
Journal of Broadcast Engineering, volume 17, issue 6, 2012, Pages 1014~1028
DOI : 10.5909/JBE.2012.17.6.1014
Recently, N-screen service and secondary device have gotten an attention from public. Also, we can experience N-screen service through various digital devices. N-screen means multimedia technology which can seamlessly consume multimedia content. Secondary device means auxiliary multimedia device which can consume content related to main content through adjunct connection to main device. Not only be electronic manufactures interested in N-screen technology and services but also digital devices applied for N-screen have been released. But it has limitation that user can only consume content to be purchased from content company server not device of user. This paper proposes the system that composes effective and various N-screen multimedia service through MPEG-4 LASeR (Lightweight Application Scene Representation) PMSI (Presentation and Modification of Structured Information) as international standard technology which can provide scene description including many instruction for dynamic update of scene.
Motion Estimation and Coding Technique using Adaptive Motion Vector Resolution in HEVC
Lim, Sung-Won ; Lee, Ju Ock ; Moon, Joo-Hee ;
Journal of Broadcast Engineering, volume 17, issue 6, 2012, Pages 1029~1039
DOI : 10.5909/JBE.2012.17.6.1029
In this papar, we propose a new motion estimation and coding technique using adaptive motion vector resolution. Currently, HEVC encodes a video using 1/4 motion vector resolution. If there are high texture regions in a picture, HEVC can't get a performance enough. So, we insert additional 1-bit flag meaning whether motion vector resolution is 1/4 or 1/8 in PU syntax. Therefore, decoder can recognize the transmitted motion vector resolution. Experimental results show that maximum coding efficiency gain of the proposed method is up to 5.3% in luminance and 7.9% in chrominance. Average computional time complexity is increased about 33% in encoder and up to 5% in decoder.
Soccer Ball Tracking Robust Against Occlusion
Lee, Kwon ; Lee, Chulhee ;
Journal of Broadcast Engineering, volume 17, issue 6, 2012, Pages 1040~1047
DOI : 10.5909/JBE.2012.17.6.1040
In this paper, we propose a ball tracking algorithm robust against occlusion in broadcasting soccer video sequences. Soccer ball tracking is a challenging task due to occlusion, fast motion and fast direction changes. Many works have been proposed based on ball trajectory. However, this approach requires heavy computational complexity. We propose a ball tracking algorithm with occlusion handling capability. Initial ball location is calculated using the circular hough transform. Then, the ball is tracked using template matching. Occlusion is handled by matching score. In occlusion cases, we generate a set of ball candidates. The ball candidates which exist in the previous frame were removed. On the other hand, the new appearing candidate is determined as the ball. Experiments with several broadcasting soccer video sequences show that the proposed method efficiently handles the occlusion cases.
Video De-noising Using Adaptive Temporal and Spatial Filter Based on Mean Square Error Estimation
Jin, Changshou ; Kim, Jongho ; Choe, Yoonsik ;
Journal of Broadcast Engineering, volume 17, issue 6, 2012, Pages 1048~1060
DOI : 10.5909/JBE.2012.17.6.1048
In this paper, an adaptive temporal and spatial filter (ATSF) based on mean square error (MSE) estimation is proposed. ATSF is a block based de-noising algorithm. Each noisy block is selectively filtered by a temporal filter or a spatial filter. Multi-hypothesis motion compensated filter (MHMCF) and bilateral filter are chosen as the temporal filter and the spatial filter, respectively. Although there is no original video, we mathematically derivate a formular to estimate the real MSE between a block de-noised by MHMCF and its original block and a linear model is proposed to estimate the real MSE between a block de-noised by bilateral filter and its original block. Finally, each noisy block is processed by the filter with a smaller estimated MSE. Simulation results show that our proposed algorithm achieves substantial improvements in terms of both visual quality and PSNR as compared with the conventional de-noising algorithms.
Binary Mask Estimation using Training-based SNR Estimation for Improving Speech Intelligibility
Kim, Gibak ;
Journal of Broadcast Engineering, volume 17, issue 6, 2012, Pages 1061~1068
DOI : 10.5909/JBE.2012.17.6.1061
This paper deals with a noise reduction algorithm which uses the binary masking approach in the time-frequency domain to improve speech intelligibility. In the binary masking approach, the noise-corrupted speech is decomposed into time-frequency units. Noise-dominant time-frequency units are removed by setting the corresponding binary masks as "0"s and target-dominant units are retained untouched by assigning mask "1"s. We propose a binary mask estimation by comparing the local signal-to-noise ratio (SNR) to a threshold. The local SNR is estimated by a training-based approach. An optimal threshold is proposed, which is obtained from observing the distribution of the training database. The proposed method is evaluated by normal-hearing subjects and the intelligibility scores are computed by counting the number of words correctly recognized.
Lane Spline Generation Using Edge Detection Robust to Environmental Changes
Kwon, Bo-Chul ; Shin, Dongwon ;
Journal of Broadcast Engineering, volume 17, issue 6, 2012, Pages 1069~1079
DOI : 10.5909/JBE.2012.17.6.1069
Lane detection with the use of a camera is an essential task required for the development of advanced driving assistance system. In this paper, edges of the lane are generated by applying Canny's method. The edge detection usually makes different results for several environmental conditions depending on the clearness of lane quality, so that it sometimes causes wrong lane detection. Therefore, we propose robust algorithm to environmental changes that automatically adjusts parameter for edge detection and generates edges more stably. Based on the acquired edges, we finally generate the spline curve of lane by using Catmull Rom spline.
A Study on Users' Perception on the Reallocation of 700MHz Spectrum After Digital Transition of Terrestrial Broadcasting
Lee, Yeong-Ju ; Park, Sung-Kyu ; Choi, Seong-Jin ;
Journal of Broadcast Engineering, volume 17, issue 6, 2012, Pages 1080~1090
DOI : 10.5909/JBE.2012.17.6.1080
This study investigates the users' preference of frequency reallocation and frequency auction after digital transition of terrestrial broadcasting and it focuses on the relationships between media using pattern, reception environment of broadcasting telecommunication, and expectation for the universal service and requirement for the public interest. The results show that the longer DMB viewing hours, people prefer to frequency allocation for the telecommunication side. The technical aspects such as perception on the reception environment of broadcasting don't make effect on the users' preference of frequency allocation. In addition, the more people think the universal service of terrestrial broadcasting important, the more people think it unnecessary to adopt auction system to the broadcasting frequency. These results give implication that it is the most basic condition to improve the reception environment in order to accomplish universal service duty of terrestrial broadcasting.
Statistical Characteristics and Complexity Analysis of HEVC Encoder Software
Ahn, Yongjo ; Hwang, Taejin ; Yoo, Sungeun ; Han, Woo-Jin ; Sim, Donggyu ;
Journal of Broadcast Engineering, volume 17, issue 6, 2012, Pages 1091~1105
DOI : 10.5909/JBE.2012.17.6.1091
In this paper, we analyzed statistical characteristics and complexity of HEVC encoder as a leading research of acceleration, optimization and parallelization. Computational complexity of the HEVC encoder is approximately twice the compression performance compared to H.264/AVC. But, the increase of encoder complexity remains a problem to be solved in the future. Before performing the research on acceleration, optimization and parallelization to reduce high complexity of HEVC encoder, we measure the complexity each module for HEVC encoder using it's reference software HM 7.1. We also measured the predicted complexity of fast HEVC encoder software, used in real applications, using HM 7.1 applying fast encoding method. The complexity is measured in terms of the operating cycle of the encoder software under the common test sequences and conditions in the Windows PC environment. In addition, we analyze statistical characteristics of HEVC encoder software according to encoding structures and limitation using coded bitstreams.
Pan/Tilt Camera System using Real-Time ELSAC and Stop/Go Procedure
Lee, Suk-Ho ;
Journal of Broadcast Engineering, volume 17, issue 6, 2012, Pages 1106~1109
DOI : 10.5909/JBE.2012.17.6.1106
The stability of object tracking in non-stationary camera environment, such as intelligent surveillance system using a pan/tilt camera, is less stable compared with stationary camera environment. This is due to the fact that it is difficult to model a background image in non-stationary environment. In this letter, we propose a non-stationay pan/tilt camera surveillance system which uses a stop/go procedure together with a real-time active contour. The proposed system can track the object stable even in an environment where only a few difference frames can be obtained.
Image Interpolation Technique Using Lapped Transforms
Joo, Seung-Yong ; Lee, Chang-Woo ;
Journal of Broadcast Engineering, volume 17, issue 6, 2012, Pages 1110~1113
DOI : 10.5909/JBE.2012.17.6.1110
Various image interpolation methods have been proposed to increase the resolution of images and accuracy of motion estimation of video, and the interpolation filters are used in H.264/AVC and HEVC standards. In this paper, we propose an efficient image interpolation method using lapped transforms. The relation between the resizing and interpolation of images is used in the proposed method, and the complexity is significantly reduced, while the performance of the proposed method is almost the same as conventional methods.