Iraqi Journal of Information and Communication Technology https://ijict.edu.iq/index.php/ijict <p>The Iraqi Journal of Information &amp; Communication Technology (IJICT) is a quarterly published specialized, referred, and indexed journal published by the college of Information Engineering at Al–Nahrain University, Baghdad, Iraq. IJICT invites contributions from researchers, scientists and practitioners from all over the world.</p> College of Information Engineering | Al-Nahrain University en-US Iraqi Journal of Information and Communication Technology 2222-758X COMPARISON STUDY BETWEEN IMAGE RETRIEVAL METHODS https://ijict.edu.iq/index.php/ijict/article/view/182 <p>Searching for a relevant image in an archive is a problematic research issue for the computer vision research community. The majority of search engines retrieve images using traditional text-based approaches that rely on captions and metadata. Extensive research has been reported in the last two decades for content-based image retrieval (CBIR), analysis, and image classification. Content-Based Image Retrieval is a process that provides a framework for image search, and low-level visual features are commonly used to retrieve the images from the image database. The essential requirement in any image retrieval process is to sort the images with a close similarity in terms of visual appearance. The shape, color, and texture are examples of low-level image features. In image classification-based models and CBIR, high-level image visuals are expressed in the form of feature vectors made up of numerical values. The researcher's findings a significant gap between human visual comprehension and image feature representation. In this paper, we plan to present a comparison study and a comprehensive overview of the recent developments in the field of CBIR and image representation.</p> Zahraa H. Al-Obaide Ayad A. Al-Ani Copyright (c) 2022 Iraqi Journal of Information and Communication Technology 2022-04-29 2022-04-29 5 1 16 30 10.31987/ijict.5.1.182 A Comparative Study of Speech Coding Techniques for Electro Larynx Speech Production https://ijict.edu.iq/index.php/ijict/article/view/185 <p>Speech coding is a method of earning a tight speech signals representation for efficient storage and efficient transmission over band limited wired or wireless channels.&nbsp; This is usually achieved with acceptable representation and least number of bits without depletion in the perceptual quality. A number of speech coding methods already developed and various speech coding algorithms for speech analysis and synthesis are used. This paper deals with the comparison of selected coding methods for speech signal produced by Electro Larynx (EL) device.&nbsp; The latter is a device used by cancer patients with their vocal laryngeal cords being removed.&nbsp; The used methods are Residual-Excited Linear Prediction (RELP), Code Excited Linear Prediction (CELP), Algebraic Code Excited Linear Predictive (ACELP), Phase Vocoders based on Wavelet Transform (PVWT), Channel Vocoders based on Wavelet Transform (CVWT), and Phase vocoder based on Dual-Tree Rational-Dilation Complex Wavelet Transform (PVDT-RADWT). The aim here is to select the best coding approach based on the quality of the reproduced speech. The signal used in the test is speech signal recorded either directly by normal persons or else produced by EL device. The performance of each method is evaluated using both objective and subjective listening tests. &nbsp;The results indicate that PVWT and ACELP coders perform better than other methods having about 40 dB SNR and 3 PESQ score for EL speech and&nbsp; 75 dB with 3.5 PESQ score for normal speech, respectively.</p> Zinah J. Mohammed Abdulkareem A. Kadhim Copyright (c) 2022 Iraqi Journal of Information and Communication Technology 2022-04-29 2022-04-29 5 1 31 41 10.31987/ijict.5.1.185 AN OPTIMIZED FUZZY LOGIC CONTROLLER FOR WIRELESS NETWORK CONTROL SYSTEM USING PSO https://ijict.edu.iq/index.php/ijict/article/view/180 <p>Wireless Networked Control System (WNCS), has the advantage of control signal efficiency, reduced costs, robust, and more flexible over the wired Networked Control System (NCS). However, one of the most important challenges of WNCS is the variable and random time delay associated with the network that effect on the whole system stability. In this paper, a fuzzy PID controller is proposed to overcome this issue by controlling the DC motor over the Wi-Fi network. PSO algorithm is used to tune the controller, and TrueTime simulator is used to simulate the Wi-Fi network. &nbsp;Experimental results showed that the tuned Fuzzy PID controller is efficiently reduced the effect of the time delay. The results show that the network can handle up to 7500 and 6000 nodes when the bandwidth is 0.4 and 0.9 respectively without a sensible degradation in the system performance of the tackled system.</p> Ibtihal A. Hasan Osama A. Awad Copyright (c) 2022 Iraqi Journal of Information and Communication Technology 2022-04-29 2022-04-29 5 1 1 15 10.31987/ijict.5.1.180 SIMULATION AND COMPARISON OF AD HOC NETWORKS ROUTING PROTOCOLS BASED ON OPNET https://ijict.edu.iq/index.php/ijict/article/view/190 <p>Ad-hoc routing algorithm has always been a core problem in research of ad-hoc networks. In order to be able to deal with various routing protocol problems on an ad-hoc network like poor validity and large control overhead, this paper classify and compare ad-hoc network routing protocols through OPNET simulation tool and focus on testing two routing protocols' performance namely, table-driven and on-demand routing protocol. The Destination Sequenced Distance Vector routing protocol is the most used table-driven routing protocols, While AODV and DSR routing protocols are the two most used on-demand routing protocols. The performance of these three protocols is simulated with a variety of packet delivery functions, average end-to-end delays, and routing loads. These protocols are also analyzed and compared. The simulation results show that for a high mobility environment, the on-demand routing protocol is the best option.</p> Samar T. Yousif Copyright (c) 2022 Iraqi Journal of Information and Communication Technology 2022-04-29 2022-04-29 5 1 42 49 10.31987/ijict.5.1.190