Go to the main menu
Skip to content
Go to bottom
REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of Broadcast Engineering
Journal Basic Information
Journal DOI :
The Korean Institute of Broadcast and Media Engineers
Editor in Chief :
Volume & Issues
Volume 3, Issue 2 - Dec 1998
Volume 3, Issue 1 - Jun 1998
Selecting the target year
A Design of 8VSB Transmission System for Use in PAL Standard
Journal of Broadcast Engineering, volume 3, issue 1, 1998, Pages 1~12
8VSB transmission system of American standard and OFDM system of European standard are to be international standards for the transmission of digital terrestrial television. When countries using PAL standard adopt the American 8VSB system which is designed under the circumstance of NTSC system, one of strong interference is the co-channel PAL interference coming from analog PAL signal. In this paper, in order to solve this problem, we classified seven types of PAL system into three groups according to the bandwidth and a new PAL-8VSB system is proposed to reject the co-channel PAL interference by using modified comb filters suitable for each group. By computer simulations of the proposed PAL-8VSB system with the co-channel PAL interference it is confirmed that the proposed comb filter results in the improvement of DIU ratio by about 9 dB.
Development of a Multimedia Authoring Tool Based on Script Interpreter
Journal of Broadcast Engineering, volume 3, issue 1, 1998, Pages 13~23
A Design of Interworking Broker for Provision of End-to-End Interoperability in Multimedia Service Environment
Journal of Broadcast Engineering, volume 3, issue 1, 1998, Pages 24~37
This paper presents a new interworking paradigm using service-level interworking functionality for provision of end-to-end interperability in Heterogeneous Network Environments such as ATM network to Internet, Internet to ATl'vI network. PSTN to ATM network, etc. We propose the concept of the Service Interworking Broker. We also propose the functional architecture of the Interworking Broker. The middleMEN is implemented for evaluating the functions of the Interworking Broker
Virtual Stage: A Scenario-Based VR System
Journal of Broadcast Engineering, volume 3, issue 1, 1998, Pages 39~49
Motion Parameter Estimation and Segmentation with Probabilistic Clustering
Journal of Broadcast Engineering, volume 3, issue 1, 1998, Pages 50~60
This paper addresses a problem of extraction of parameteric motion estimation and structural motion segmentation for compact image sequence representation and object-based generic video coding. In order to extract meaningful motion structure from image sequences, a direct parameteric motion estimation based on a pre-segmentation is proposed. The pre-segmentation which considers the motion of the moving objects is canied out based on probabilistic clustering with mixture models using optical flow and image intensities. Parametric motion segmentation can be obtained by iterated estimation of motion model parameters and region reassignment according to a criterion using Gauss-Newton iterative optimization algorithm. The efficiency of the proposed methoo is verified with computer simulation using elF real image sequences.
The Comparison among Various Propagation prediction Models for Broadcasting Wave
Journal of Broadcast Engineering, volume 3, issue 1, 1998, Pages 61~68
This paper compares various propagation models developed by several researchers with the measurements in Korea. The models we have considered are Okumura model, Longley-Rice model, ITU-R model and Lee model. The measured signal is vertically IXllarized E -field transmitted from Mt. Namsan at 320MHz. According to the result, Okumura model shows the best performance for the overall test IXlints, and ITU-R model has a good performance as Okumura model for receiving points above lOkm from the transmitter.
Joint Quality Control of MPEG-2 Video Programs for Digital Broadcasting Services
Journal of Broadcast Engineering, volume 3, issue 1, 1998, Pages 69~84
In digital broadcasting, services such as digital satellite TV, cable TV and digital terrestrial TV, several video programs are compressed by MPEG-2, and then simultaneously transmitted over a conventional CBR (Constant Bit Rate) broadcasting channel. In this paper, we propose a joint quality control scheme to be able to accurately control the relative picture quality among the video programs, which is achieved by simdt;,nL'Ously controlling the video encoders to generate the VBR (Variable Bit Rate) compressed video streams. Our quality control scheme can prevent the video buffer overflow and underflow by total target bit allocation process, and also exactly control the relative picture quality in terms of PSNR (Peak Signal to Noise Ratio) between some programs requiring higher picture quality and others by rate-distortion modification. Furthermore we present a rate-distortion estimation method for MPEG-2 video, which is base of our joint quality control, and verify its performance by experiments. The most attractive features of this estimation method are as follows: 1) computational complexity is low because main operation for the estimation is to calculate the histogram of OCT coefficients into quantizer; 2) estimation results are very accurate enough to be applied to the practical MPEG-2 video coding applications. Simulation results show that the proposed joint quality control scheme accurately controls the relative picture quality among the video progran1s transmitted over a single channel as well as provides more consistent and higher picture quality than independent coding scheme that encodes each program independently.
A VLSI Architecture for Fast Motion Estimation Algorithm
Journal of Broadcast Engineering, volume 3, issue 1, 1998, Pages 85~92
The block matching algorithm is the most popular motion estimation method in image sequence coding. In this paper, we propose a VLSI architecture. for implementing a recently proposed fast bolck matching algorith, which uses spatial correlation of motion vectors and hierarchical searching scheme. The proposed architecture consists of a basic searching unit based on a systolic array and two shift register arrays. And it covers a search range of -32~ +31. By using the basic searching unit repeatedly, it reduces the number of gatyes for implementation. For basic searching unit implementation, a proper systolic array can be selected among various conventional ones by trading-off between speed and hardware cost. In this paper, a structure is selected as the basic searching unit so that the hardware cost can be minimized. The proposed overall architecture is fast enough for low bit-rate applications (frame size of
, 3Oframes/sec) and can be implemented by less than 20,000 gates. Moreover, by simply modifying the basic searching unit, the architecture can be used for the higher bit-rate application of the frame size of
and 30 frames/sec.
Design and Fabrication of a Ka-Band Fin-line Filter
Journal of Broadcast Engineering, volume 3, issue 1, 1998, Pages 93~99
Motion Estimation Using Modified Cost Functions
Journal of Broadcast Engineering, volume 3, issue 1, 1998, Pages 100~109
The coding of video sequences has been the focus of research in recent years. High Definition TV(HDTV), video conferencing and video on demand(VOD) are some of the well known applications. In the moving picture compression, motion estimation algorithm plays a very important role, but due to its high computational complexity, there has been many approaches to overcome this difficulty. We propose a new block matching criterion that uses modified cost functions. This new block matching criterion classifies pixels into 2-levels, 4-levels and 8-levels with a suitable thresholding method. We also show that our new proposed algorithms can easily be combined with many other fast motion estimation algorithms with good performance.