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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 15, Issue 6 - Nov 2010
Volume 15, Issue 5 - Sep 2010
Volume 15, Issue 4 - Jul 2010
Volume 15, Issue 3 - May 2010
Volume 15, Issue 2 - Mar 2010
Volume 15, Issue 1 - Jan 2010
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A High-Quality Occlusion Filling Method Using Image Inpainting
Kim, Yong-Jin ; Lee, Sang-Hwa ; Park, Jong-Il ;
Journal of Broadcast Engineering, volume 15, issue 1, 2010, Pages 3~13
DOI : 10.5909/JBE.2010.15.1.003
In this paper, we propose a method for filling out the occlusions in generating multi-view images from one source image and its ground-truth depth image. The method is based on image inpainting and layered interpolation. The source image is first divided into several layers using depth information. The occlusions are interpolated separately in every layered image using the image inpainting algorithm. Finally, the interpolated layered images are combined to obtain different viewpoint images. Interpolating occlusions with depth-correlated texture information that is contained to each layer makes it possible to obtain more detailed and accurate results than previous methods. The effectiveness of the proposed method is shown through experimental results.
Distributed Translator Part 1: Distributed Translator Technology
Kim, Heung-Mook ; Park, Sung-Ik ; Eum, Ho-Min ; Seo, Jae-Hyun ; Lee, Yong-Tae ; Lim, Hyoung-Soo ; Lee, Soo-In ; Lee, Hyuck-Jae ;
Journal of Broadcast Engineering, volume 15, issue 1, 2010, Pages 14~28
DOI : 10.5909/JBE.2010.15.1.014
This paper considers technological requirements to broadcast digital television signals using distributed frequency network (DFN) in the advanced television systems committee (ATSC) transmission system and proposes distributed translator (DTxR) to meet such requirements. In the DFN, DTxR uses different frequency from main transmitter, but same among DTxRs. In addition, this paper introduces digital signal processing (DSP) techniques, which consist of demodulation, equalization, transmitter identification (TxID) generation and insertion, and modulation, to implement DTxR.
Distributed Translator Part 2: Laboratory Test Results
Park, Sung-Ik ; Eum, Ho-Min ; Seo, Jae-Hyun ; Kim, Heung-Mook ; Lee, Soo-In ;
Journal of Broadcast Engineering, volume 15, issue 1, 2010, Pages 29~39
DOI : 10.5909/JBE.2010.15.1.029
This paper presents and analyzes laboratory test results of distributed translator (DTxR) for distributed frequency network (DFN) in the ATSC (Advanced Television Systems Committee) terrestrial digital TV broadcasting system. The DTxR laboratory test is classified to receiving part test and transmitting part test. The receiving part test includes dynamic range, random noise, single echo, and adjacent channel interference. The transmitting part test includes quality of output signal (out-of channel emission, quality of transmitting signal, and phase noise), frequency synchronization among output signals, and TxID (Transmitter Identification) signal's affect to the legacy receiver. By the laboratory test results, the receiving part of DTxR eliminates average -2.5 dB of single echo and has average 17.5 dB at TOV (Threshold of Visibility) under random noise environment. In addition, the transmitting part of DTxR satisfies the specification of US FCC (Federal Communications Commission), and frequency difference among DTxR output signals is less than 0.001 Hz.
Distributed Translator Part 3: Field Test Results
Park, Sung-Ik ; Seo, Jae-Hyun ; Eum, Ho-Min ; Lee, Yong-Hoon ; Kim, Heung-Mook ;
Journal of Broadcast Engineering, volume 15, issue 1, 2010, Pages 40~51
DOI : 10.5909/JBE.2010.15.1.040
This paper presents and analyzes field test results of distributed translator (DTxR) for distributed frequency network (DFN) in the ATSC (Advanced Television Systems Committee) terrestrial digital TV broadcasting system. In the field test, according to types of antennas and receivers in areas where are overlapped by two DTxRs' coverage, we measured reception power, noise margin reception possibility, and ease of reception at each test point. By the field test results, when two DTxRs are on, reception power and noise margin are increased than when one DTxR is on. However, reception rate and ease of reception are similar or increased according to types of receivers.
A PDWZ Encoder Using Code Conversion and Bit Interleaver
Kim, Jin-Soo ; Kim, Jae-Gon ; Seo, Kwang-Deok ;
Journal of Broadcast Engineering, volume 15, issue 1, 2010, Pages 52~62
DOI : 10.5909/JBE.2010.15.1.052
Recently, DVC (Distributed Video Coding) is attracting a lot of research works since this enables us to implement a light-weight video encoder by distributing the high complex tasks such as motion estimation into the decoder side. In order to improve the coding efficiency of the DVC, the existing works have been focused on the efficient generation of side information (SI) or the virtual channel modeling which can describe the statistical channel noise well. But, in order to improve the overall performance, this paper proposes a new scheme that can be implemented with simple bit operations without introducing complex operation. That is, the performance of the proposed scheme is enhanced by using the fact that the Wyner-Ziv (WZ) frame and side information are highly correlated, and by reducing the effect of virtual channel noise which tends to be clustered in some regions. For this aim, this paper proposes an efficient pixel-domain WZ (PDWZ) CODEC which effectively exploits the statistical redundancy by using the code conversion and Gray code, and then reduces the channel noise by using the bit interleaver. Through computer simulations, it is shown that the proposed scheme can improve the performance up to 0.5 dB in objective visual quality.
Multi-Level Correlation LMS Algorithm for Digital On-Channel Repeater System in Digital TV Broadcasting System Environment
Lee, Je-Kyoung ; Kim, Jeong-Gon ;
Journal of Broadcast Engineering, volume 15, issue 1, 2010, Pages 63~75
DOI : 10.5909/JBE.2010.15.1.063
In this paper, the equalizer techniques that is able to adopt the digital on-channel repeater for 8VSB-based DTV system has been analyzed and we propose an effective equalizer structure which can reduce the error propagation phenomenon by the feedback signal and improve the receiver performance at the same time. In order to confirm the effective cancellation of the feedback signal, the multi-level Correlation LMS scheme is proposed through the analysis of conventional basic LMS based DFE and Correlation LMS algorithm and as compared with the conventional method, we can confirm the reduction of error propagation. When performing the computer simulation, as the Brazil channel model which is very popular for DTV broadcasting system is adopted, the result is drawn by comparing and analysing the equalizer algorithm. We have examine the symbol error rate which is in the range of 15~25dB of operation receipt SNR and MSE(Mean Square Error) in the DTV broadcasting system. As a result of comparing with the existing method, the signal-noise ratio which is necessary for maintain the bit error correction ability that the means of proposal is same is reduced by about 2~5dB, and in the rate of convergence through the MSE, we found the reduction of needed time.
The effects of video quality by LED background image in the broadcasting lighting
Kim, Yong-Kyu ; Kim, Kyung-Ho ; Lee, Seon-Hee ; Choi, Seong-Jhin ;
Journal of Broadcast Engineering, volume 15, issue 1, 2010, Pages 76~88
DOI : 10.5909/JBE.2010.15.1.076
Recently, LED background image devices are used for the production of broadcasting programs. But the effective advantages of LED background image devices are not realized for good HD video quality because the correlations between lighting sources and LED background image devices are not analyzed yet. In this paper, we analyze the color change and light intensity that lighting sources and the light intensity ratio of LED background images influence on a subject, making use of equipments used in real broadcasting, and examine the correlations between HD video quality and the light intensity ratio of LED background images. As a result in this experiment, the video is most expressed having an 20[IRE] effect on a subject when the light intensity of LED background image is 6%. When the LED background image is light, the light and darkness of video is distorted and when the LED background image is dark, the colors of image are distorted.
Technical analysis of frequency reallocation to FM broadcasting link system for effective use in 900 MHz band
Suh, Kyoung-Whoan ; Lee, Joo-Hwan ;
Journal of Broadcast Engineering, volume 15, issue 1, 2010, Pages 89~98
DOI : 10.5909/JBE.2010.15.1.089
In this paper, the technical analyzing methodology has been suggested to preserve the same transmission quality of a M/W system used for FM broadcasting link after the frequency reallocation. The simulation was also performed for the actual M/W system operating in each frequency band, and its results were evaluated in terms of an availability based upon a fade margin. It was confirmed that only if the relative fade margin of more than 2.6 dB at 1700 MHz is provided, the equivalent service quality may be obtained regardless of the frequency reallocation. The suggested method will be expected to be widely used for accessing service quality of the M/W system concerned with the frequency reallocation.
Experimental analysis of frequency reallocation to FM broadcasting link system for effective use in 900 MHz band
Lee, Joo-Hwan ; Suh, Kyoung-Whoan ;
Journal of Broadcast Engineering, volume 15, issue 1, 2010, Pages 99~111
DOI : 10.5909/JBE.2010.15.1.099
In this paper as a follow-up to Paper I, the required fade margin derived in Paper I to preserve the same service quality has been examined by analyzing system and propagation characteristics as well as measured data. The comparison of the fade margin between simulated and measured results is also performed for the actual operating line-of-sight(LOS) and non-LOS links, and practical usefulness as an analysis tool is revealed by checking service quality of M/W system relevant to frequency reallocation. According to simulated and measured results, there was a little difference for LOS link between Mt. Moodung and Mt. Mangun, but a fairly good agreement was reached for non-LOS link between Andong KBS and transmitter site.
Distributed video coding complexity balancing method by phase motion estimation algorithm
Kim, Chul-Keun ; Kim, Min-Geon ; Suh, Doug-Young ; Park, Jong-Bin ; Jeon, Byeung-Woo ;
Journal of Broadcast Engineering, volume 15, issue 1, 2010, Pages 112~121
DOI : 10.5909/JBE.2010.15.1.112
Distributed video coding is a coding paradigm that allows complexity to be shared between encoder and decoder, in contrast with conventional video coding. We propose that complexity balancing method of encoder/decoder by phase motion estimation algorithm. The encoder performs partial motion estimation. The result of the partial motion estimation is transferred to the decoder, and the decoder performs motion estimation within the narrow range. When the encoder can afford some complexity, complexity balancing is possible. The method proposed is able to know relativity between complexity balancing and coding efficiency. The coding efficiency increase rate by the encoder complexity increases is higher than that by the decoder complexity increases. The proposed method can control the complexity and coding efficiency according to devices' resources and channel conditions.
AT-DMB Reception Method with Eigen-space Beamforming Algorithm
Lee, Jae-Hong ; Choi, Seung-Won ;
Journal of Broadcast Engineering, volume 15, issue 1, 2010, Pages 122~132
DOI : 10.5909/JBE.2010.15.1.122
AT-DMB system has been developed to increase data rate up to double of conventional T-DMB in the same bandwidth while maintaining backward compatibility. The AT-DMB system adopted hierarchical modulation which adds BPSK or QPSK signal as enhancement layer to existing DQPSK signal. The enhancement layer signal should be small enough to maintain backward compatibility and to minimize the coverage loss of conventional T-DMB service coverage. But this causes the enhancement layer signal of AT-DMB susceptible to fading effect in transmission channel. A turbo code which has improved error correction capability than convolutional code, is applied to the enhancement layer signal of the AT-DMB system for compensating channel distortion. However there is a need for other solutions for better reception of AT-DMB signal in receiver side without increasing transmitting power. In this paper, we propose adaptive array antenna system with Eigen-space beamforming algorithm which benefits beamforming gain along with diversity gain. We analyzed the reception performances of AT-DMB system in indoor and mobile environments when this new smart antenna system and algorithm is introduced. The computer simulation results are presented along with analysis comments.
Quadtree Image Compression Using Edge-Based Decomposition and Predictive Coding of Leaf Nodes
Jang, Ho-Seok ; Jung, Kyeong-Hoon ; Kim, Ki-Doo ; Kang, Dong-Wook ;
Journal of Broadcast Engineering, volume 15, issue 1, 2010, Pages 133~143
DOI : 10.5909/JBE.2010.15.1.133
This paper proposes a quadtree image compression method which encodes images efficiently and also makes unartificial compressed images. The proposed compression method uses edge-based quadtree decomposition to preserve the significant edge-lines, and it utilizes the predictive coding scheme to exploit the high correlation of the leaf node blocks. The simulation results with
grayscale images verify that the proposed method yields better coding efficiency than the JPEG by about 25 percents. The proposed method can provide more natural compressed images as it is free from the ringing effect in the compressed images which used to be in the images compressed by the fixed block based encoders such as the JPEG.
Automated Video Clip Creation Using Time-based Social Bookmark Clustering
Han, Sung-Hee ; Lee, Jae-Ho ; Kang, Dae-Kap ;
Journal of Broadcast Engineering, volume 15, issue 1, 2010, Pages 144~147
DOI : 10.5909/JBE.2010.15.1.144
Recently the change of content consumption trend activated the social video sharing platform and the video clip itself. There have been intensive interests and efforts to automatically abstract compact and meaningful video clips. In this paper, we propose a method which use the clustering of the bookmark data created by collective intelligence instead of using the video content analysis. The partitional clustering of points in 2-dimensional space derived from the bookmark data make it possible to abstract highlights effectively. The method is enhanced by the 1-dimensional accumulated bookmark count graph. Experiments on the real data from KBS internet service show the effectiveness of the proposed method.