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Journal of ICT Research and Applications
Published by Institut Teknologi Bandung
ISSN : 23375787     EISSN : 23385499     DOI : https://doi.org/10.5614/itbj.ict.res.appl.
Core Subject : Science,
Computer Science & IT
Journal of ICT Research and Applications welcomes full research articles in the area of Information and Communication Technology from the following subject areas: Information Theory, Signal Processing, Electronics, Computer Network, Telecommunication, Wireless & Mobile Computing, Internet Technology, Multimedia, Software Engineering, Computer Science, Information System and Knowledge Management.
Arjuna Subject : Ilmu Komputer (semua kategori) - Aplikasi Ilmu Komputer
Articles 5 Documents
 1 
Search results for , issue "Vol. 6 No. 2 (2012)" : 5 Documents clear
An Alternative Design Topology for Metropolitan Area Networks Antonius Suhartomo
Journal of ICT Research and Applications Vol. 6 No. 2 (2012)
Publisher : LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/itbj.ict.2012.6.2.1

Abstract

One of the key issues in designing a network topology is vulnerability. The vulnerability parameter measures the resistance of a network to disruption of operation  after  the  failure  of  certain  stations  or  communication  links.  One counter-measure  to address  the vulnerability of a network is edge connectivity.In this paper, a  more selective concept of edge  connectivity is introduced, called component  order  edge  connectivity  for  MAN  topology  design.  This  parameter equals the smallest number of edges that must be removed in order to ensure that the  order  of  each  component  of  the  resulting  sub -network  or  sub-graph  is  less than k. 
A Low-Complexity and High-Throughput RTL Design of a BCH (15,7) Decoder Hendra Setiawan
Journal of ICT Research and Applications Vol. 6 No. 2 (2012)
Publisher : LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/itbj.ict.2012.6.2.2

Abstract

The  Bose,  Chaudhuri  and  Hocquenghem  (BCH)  codes  form  a  large class  of  powerful  random-error  correcting  cyclic  codes.  However,  the implementation  of  its  decoder  requires  high-complexity  computation  resources with a huge number of sequential circuits. This paper presents a  low-complexity register transfer level (RTL) circuit design of a BCH decoder. In accordance with the  table  relationship  between  the  syndrome  and  the  error  bit  position,  we propose  a  circuit that  is  mostly occupied by combinational elements without any sequential evolvement. Therefore the designed  system has a  low complexity and high  throughput  properties.  The  implementation  of  the  BCH  (15,7)decoder  on Virtex  5  FX70TFF1136  requires  77  look-up  tables  (LUTs)  with  the  maximum throughput reaching 1.7 Gbps.
A New RTL Design Approach for a DCT/IDCT-Based Image Compression Architecture using the mCBE Algorithm Rachmad Vidya Wicaksana Putra; Rella Mareta; Nurfitri Anbarsanti; Trio Adiono
Journal of ICT Research and Applications Vol. 6 No. 2 (2012)
Publisher : LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/itbj.ict.2012.6.2.3

Abstract

In  the  literature, several approaches  of  designing  a  DCT/IDCT-based image compression system have been proposed.  In this paper,  we present a new RTL design approach with as main  focus developing a  DCT/IDCT-based image compression  architecture  using  a  self-created  algorithm.  This  algorithm  can efficiently  minimize  the  amount  of  shifter -adders  to  substitute  multiplier s.  We call  this  new  algorithm  the  multiplication  from  Common  Binary  Expression (mCBE)  Algorithm. Besides this algorithm, we propose alternative quantization numbers,  which  can  be  implemented  simply  as  shifters  in  digital  hardware. Mostly, these numbers can retain a good compressed-image quality  compared to JPEG  recommendations.  These  ideas  lead  to  our  design  being  small  in  circuit area,  multiplierless,  and  low  in  complexity.  The  proposed  8-point  1D-DCT design  has  only  six  stages,  while  the  8-point  1D-IDCT  design  has  only  seven stages  (one  stage  being  defined as  equal  to  the  delay  of  one  shifter  or  2-input adder). By using the pipelining method, we can achieve a high-speed architecture with latency as    a  trade-off consideration. The  design has been synthesized and can reach a speed of up to 1.41ns critical path delay (709.22MHz). 
Incident and Traffic-Bottleneck Detection Algorithm in High-Resolution Remote Sensing Imagery Sayed M.M. Kahaki; Md. Jan Nordin; Amir H. Ashtari
Journal of ICT Research and Applications Vol. 6 No. 2 (2012)
Publisher : LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/itbj.ict.2012.6.2.4

Abstract

One  of  the  most  important  methods  to  solve  traffic  congestion  is  to detect the incident state of a roadway. This paper describes the development of a method  for  road  traffic  monitoring  aimed  at  the  acquisition  and  analysis  of remote  sensing  imagery.  We  propose  a  strategy  for  road  extraction,  vehicle detection  and incident detection  from remote sensing imagery using techniques based on neural networks, Radon transform  for angle detection and traffic-flow measurements.  Traffic-bottleneck  detection  is  another  method  that  is  proposed for recognizing incidents in both offline and real-time mode. Traffic flows and incidents are extracted from aerial images of bottleneck zones. The results show that the proposed approach has a reasonable detection performance compared to other methods. The best performance of the learning system was a detection rate of 87% and a false alarm rate of less than 18% on 45 aerial images of roadways. The performance of the traffic-bottleneck detection  method had a detection rate of 87.5%.
Development of a Two-Channel Simultaneous Photoplethysmography Recording System Kim Soon Chong; Kok Beng Gan; Mohd. Ali Mohd. Alauddin
Journal of ICT Research and Applications Vol. 6 No. 2 (2012)
Publisher : LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/itbj.ict.2012.6.2.5

Abstract

Multi-site photoplethysmograph  (PPG) recording enables researchers to study the vascular and hemodynamic  properties of human subjects. Currently, there  is  no  commercial  system  available  in  the  market  to  perform  either  one channel or multi-channel PPG recording. PPG is an optoelectronic technique that measures  changes  in  blood  volume  associated  with  cardiac  contraction.  The measurements  can  be  obtained  from  fingertips,  ear  lobes  and toes  due  to  their low absorption and high degree of vasculature. The main objective of this project is to develop a two-channel simultaneous PPG recording system to acquire PPG signals  from  two  different  physiological  sites  using  a  Nellcor  equivalent  PPG probe.  MATLAB  software  was  used  during  the  development  phase  to  ensure rapid prototyping. The experiment results show that there was no inter -channel delay in the developed two-channel PPG system. Our preliminary results show that the delays between the left and the right arm were from 4 to 12 ms in three healthy random subjects. The system is portable, powered by universal serial bus (USB) and allows the user to do the PPG data acquisition in a clinical setting.

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