• The Journal of the Korea institute of electronic communication sciences
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• v.10 no.1
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• pp.33-38
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• 2015

The goal of this paper is to propose the Hangul Jamo to make a optimum transmission code of Hangul consonant and vowel(Jamo). The Hangul Jamo was analyzed by three kinds of Hangul Jamo. First one is the basic Hangul Jamo which is consisted by 24ea Jamo. Second one is a two combination keyboard which has 28ea Jamo. Third one is 54 Jamo set which is added the double Jamo to the second one. Use frequency of Hangul-Jamo is analyzed based on the Hangul in "Modern Korean Use Frequency Rate Survey Result" issued by The National Institute of the Korean Language". Total 58,437 Korean words are contained in the report and the words are composed with Hangul 1,540ea. The results of this study are as follows, In the Jamo are that in the first Jamo set case, the highest use frequency consonant is "ㅇ" and the lowest one is "ㅋ", and in the vowel case, the highest use frequency one is "ㅏ" and the lowest one is "ㅑ". In the second case, the highest use frequency consonant is same as first case and the highest vowel is "ㅏ" and the lowest one is "ㅒ". In the third case, the highest consonant is "ㅏ" and the lowest one is "ㅞ". the highest vowel is "ㄱ" and the lowest one is "ㄽ".

• Journal of Advanced Navigation Technology
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• v.19 no.2
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• pp.153-160
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• 2015

This paper has studied about the scrambling occurrence frequency in UTF-8 coding system for Unicode Hangul Jamo codes. The scrambling methode applied in the study is HDB-3 in AMI line coding that is international transmission standard. In the study, the source coding rule was applied to analysis the scrambling occurrence. The quantity of the scrambling occurrence was calculated by the number of times and frequency rate of the scrambling occurrence in Hangul Jamo and Compatibity Hangul Jamo. In the case of Hangul Jamo, the number of times and frequency rate in Unicode and UTF-8 were 24times, 52% and 148times, 228% respectively. In the case of Compatibility Hangul Jamo, that were 10times, 14% and 83times, 131% respectively. As a result, when Hangul Jamo and Compatibility Hangul Jamo in UNICODE were transformed to UTF-8, the scrambling frequency rates were increased 340% and 851% respectively.

• Journal of KIISE:Software and Applications
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• v.34 no.2
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• pp.169-177
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• 2007

Hangul text normalization in current Unicode makes wrong Hangul syllable problems when using with precomposed modern Hangul syllables and composing old Hangul by using conjoining-Hangul Jamo and compatibility Hangul Jamo. This problem comes from allowing incorrect normalization form of compatibility Hangul Jamo and Hangul Symbol and also permitting to use conjoining-Hangul Jamo mixture with precomposed Hangul syllable in Unicode Hangul composing rule. It is caused by lack of consideration of old Hangul and/or insufficient understanding of Hangul code processing when writing specification for normalization forms in Unicode. Therefore on this paper, we study Hangul code in Unicode environment, specifically problems of normalization used for Web and XML, IDN in nowadays. Also we propose modification of Hangul normalization methods and Hangul composing rules for correct processing of Hangul normalization in Unicode.

• The Journal of the Korea institute of electronic communication sciences
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• v.8 no.10
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• pp.1535-1544
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• 2013

There are many Hangul input systems to input Korean letter on computer or smart phone. However, the existing systems need to be required more efforts to modify the already inputted letters. This research suggests the Hangul letter modification method which can modify letter effectively based on reusing the alphabets previously inputted. The Hangul modification system using "Jamo Modification Window" follows the composition principle of Hangul, and utilize the already inputted alphabets. It can be applicable to the existing input system without any modification using only "Jamo Modification Window". Especially, this system is very useful on smart phone with small screen.

• The Journal of the Korea institute of electronic communication sciences
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• v.13 no.4
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• pp.803-812
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• 2018

The Morse code was firstly used for a wire telegraph service on May 1884 in USA. After about 10 years Korean researchers developed the Morse code in 1884 and the Morse code was firstly introduced in Korea for the wire telegraph service in September 1885. For about 130 years later, the Hangul Jamo Morse code has been used without any serious modification up to now. The Morse code is the variable length code system which each codes have a different code length. The related reference shows that English alphabet Morse code was applied in the coding theory. However, a result of analysis showed that the Hangul Jamo Morse code was not applied in the coding theory as the english alphabet code system. This paper presents the analysis result of Hangul Jamo Morse code according to the variable length coding theory. As a result of the analysis, when Hangul Jamo are coded with application of the variable length coding theory, the transmission data rate could be increased up to 25% compare to the existing code system. This paper shows a new Hangul Jamo Morse code system based on the analysis result.

• Journal of Advanced Navigation Technology
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• v.16 no.6
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• pp.1044-1051
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• 2012

This paper proposed a new Hangul Jeongum Jamo coding system. To do it, the current Hangul Jeongum coding system was analyzed with the source coding rule of character. As a result of the study, the current Hangul Jeongum coding system should be changed because there are many violated codes in the coding system. When the proposed coding system for Hangul Jeongum coding system is applied, the datacommunication efficiency could be increased to 19.78%.

• The Journal of the Korea institute of electronic communication sciences
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• v.8 no.2
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• pp.227-240
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• 2013

This paper studied how much influence UTF coded data is given to HDB-3 operation efficiency. This paper applied the Hangul Jamo and Compatability Hangul Jamo in Unicode to compare to its UTF-8 coded data. As a result of study, When Unicode is reformatted to UTF-8 code, the data code run counter to the source coding rule was very much increased.

• The Transactions of the Korea Information Processing Society
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• v.3 no.6
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• pp.1580-1587
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• 1996

The Hangul font design by using Hangul automata is more economical than other system in terms of the time to generate whole Hangul font set. In order to obtain good quality of Hangul font by this system, it is known that more Hangul jamo font primitives rules. In this paper, we present an effective combing rules in order to generate Hangul font set and to provide an integrated capabilities in Hangul font design environment.

• KIISE Transactions on Computing Practices
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• v.21 no.11
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• pp.699-705
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• 2015

Thousands of glyphs are necessary for Hangul font generation. It is mandatory to generate the required glyphs before producing Hangul font. This paper, entitled "Multiple Master Glyph Algorithm", presents an process that generates a target number of glyphs automatically from a very small number of glyphs by using a combination rule setting and a glyph interpolation method. A font editor, which is able to generate Hangul glyphs or fonts, is developed based on this algorithm. The editor generates a target number of fundamental glyphs automatically by using a combination rule setting and four master glyphs, which can be set up by a user. The automatically generated glyphs can be used to generate a target font by combining KSX1001 standard Hangul 2350 characters or Unicode standard Hangul 11172 characters automatically. The efficiency of the proposed Hangul editor is analyzed quantitatively in this paper through application to several commercial typefaces.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.12 no.6
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• pp.561-566
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• 2019

In the Internet space, integrity and security must be maintained for secure and confidential communication, which ensures reliability between sender and receiver. Cryptography is an important factor in maintaining robustness against external attacks. For this purpose, encryption and steganography methods are used. Steganography is a method of hiding confidential information without making statistically significant changes to digital media. I propose a method of transforming the Hangul-Jamo consisting of choseong, jungseong and jongseong, and inserting them into RGB pixel values of the cover image. In order to improve security, a new blending method was used to hide the altered information in the lowest region. In this case, a mixture of LSB and LDR techniques was applied. PSNR was calculated for image quality. The PSNR of the proposed method is 43.225dB, which satisfies the lowest level.