A Hangul Sebeolsik(3-Layer) 23-Keys Phoneme/Syllable Chorded Keys Computer Keyboard for Easy Fingering: Ahnmatae Keyboard Improvement

초록

For high speed key in, it must be entered in syllable units like the shorthand method. In this study, fingering was made easier by reducing the number of keys on the existing Ahnmatae keyboard, which is a syllable unit input method, from 30 to 23 and adjusting the key arrangement for each phoneme. That is, the Ahnmatae keyboard was improved. Hangul's 8 initial consonant keys, 8 neutral vowel keys, and 7 final consonant keys were placed. It was designed with 23 single-key phonemes and 44 two-keys combination phoneme chorded key phonemes. The number of keys to be pressed at the same time to key in a single syllable, that is, the number of syllable chorded keys is 2 to 6. Existing was 2 to 8. The key input weight effort index obtained by applying the phoneme use frequency was 1.60ue(unit effort). Existing was 1.92ue. The entropy value of the phoneme use frequency was 1.46nat. The weight effort index to entropy ratio obtained from this entropy value and the weight effort index value was 1.10ue/nat. Existing was 1.32ue/nat. The actual operation was implemented by setting the Nalgaeset which is a keyboard design software, and using the N key roll-over keyboard. © 2021, Korean Institute of Communications and Information Sciences. All rights reserved.

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