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All Journal Scientific Journal of Informatics Jurnal Sistem Informasi Kaputama (JSIK)
Silitonga, Parasian D. P
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Computer Science & IT

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Compression and Decompression of Audio Files Using the Arithmetic Coding Method Silitonga, Parasian D. P; Morina, Irene Sri
Scientific Journal of Informatics Vol 6, No 1 (2019): May 2019
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/sji.v6i1.17839

Abstract

Audio file size is relatively larger when compared to files with text format. Large files can cause various obstacles in the form of large space requirements for storage and a long enough time in the shipping process. File compression is one solution that can be done to overcome the problem of large file sizes. Arithmetic coding is one algorithm that can be used to compress audio files. The arithmetic coding algorithm encodes the audio file and changes one row of input symbols with a floating point number and obtains the output of the encoding in the form of a number of values greater than 0 and smaller than 1. The process of compression and decompression of audio files in this study is done against several wave files. Wave files are standard audio file formats developed by Microsoft and IBM that are stored using PCM (Pulse Code Modulation) coding. The wave file compression ratio obtained in this study was 16.12 percent with an average compression process time of 45.89 seconds, while the average decompression time was 0.32 seconds.
IMPLEMENTASI SYSTEM DEVELOPMENT LIFE CYCLE PADA RANCANG BANGUN SISTEM PENDAFTARAN PASIEN BERBASIS WEB Silitonga, Parasian D. P; Purba, Doni El Rezen
Jurnal Sistem Informasi Kaputama (JSIK) Vol. 5 No. 2 (2021): Volume 5, Nomor 2, Juli 2021
Publisher : STMIK KAPUTAMA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59697/jsik.v5i2.712

Abstract

The system development life cycle (SDLC) is a form of describing the stages of the system development process. The systems development life cycle presents a methodology or an organized process for building a system. One of the efforts made by the hospital to avoid long queues is to develop a web-based patient registration system. The design of the system in this study was carried out using use case diagrams and sequence diagrams. Based on the results of the process testing carried out on the applications produced in the study, it was found that the system built worked well, with no errors in the data processing process. Meanwhile, based on system interface testing, it was found that based on usability aspects, 26% of respondents chose very good; 59.4% chose good and 14.6% chose enough. Based on the user aspect 29% chose very good; 55.2% chose good and 15.6% chose enough. Based on the interaction aspect 20% chose very good; 50.8% chose good and 28.9% chose enough.
Co-Authors Morina, Irene Sri Purba, Doni El Rezen