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Text Input in Indic Scripts

Text Input in Indic Scripts. Anirudha Joshi Industrial Design Centre, IIT Bombay. Illiterate (26%). Illiterate (35%). Primary school (14%). Middle school (9%). Metric (8%). HSC / Diploma (4%). Graduates (3.7%). Source: The Times of India. How many people in India speak English?.

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Text Input in Indic Scripts

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  1. Text Input in Indic Scripts Anirudha JoshiIndustrial Design Centre, IIT Bombay

  2. Illiterate (26%) Illiterate (35%) Primary school (14%) Middle school (9%) Metric (8%) HSC / Diploma (4%) Graduates (3.7%)

  3. Source: The Times of India

  4. How many people in India speak English?

  5. How many people in India prefer to speak in English?

  6. Source: Top 10 Publications 2012 Q1, Hansa Research, MRUS, IRS

  7. Source: An Installation in IDC

  8. Structure of the Devanagari Script Vowels अ आ इ ई उ ऊ ए ऐ ओ औ अं अः Vowels Vowel modifiers ◌ा ि ी ु ू े ै ो ौ ं ः Gutturals कखगघङ Palatals च छ ज झ ञ Linguals ट ठ ड ढ ण ट ठ ड ढ ण त थ द ध न Consonants Dentals त थ द ध न च छ ज झ ञ प फ ब भ म Labials प फ ब भ म कखगघङ Semi-vowels य र ल व श ष स ह ळ क्ष ज्ञ 12

  9. Challenges in Text Input in Indian Languages Vowels अ आ इ ई उ ऊ • Large number of characters • ~660 frequent glyphs • 2+ keystrokes = glyph क + ो =को (C + V) क+ ो +ं = कों (C + V + V) • Difference in pronunciation and visual sequence क +ि =कि • Conjuncts (halant् between two consonants) ट+ ् + व= ट्व (C + C) • Varying similarity between conjuncts and consonants स+ ् + त= स्त क+ ् + र= क्र र+ ् + क= र्क क+ ् + ष= क्ष ए ऐ ओ औ अं अः Vowels Vowel modifiers ◌ा ि ी ु ू े ै ो ौ ं ः Gutturals कखगघङ Palatals च छ ज झ ञ Linguals ट ठ ड ढ ण Consonants Dentals त थ द ध न Labials प फ ब भ म Semi-vowels य र ल व श ष स ह ळ क्ष ज्ञ

  10. Text Input in Indic Languages • QWERTY keyboard for Devanagari input • Devanagari needs 52 keys (13 vowels, 34 consonants, 4 conjuncts, 1 halant) • QWERTY has 26 un-shifted keys • Leads to cognitive load on users • Complex structure of Indic scripts (G > K) • Large number of glyphs • Need much training and practice • 30-50 hours to reach 25 wpm • Slow starts • Only professional typists put in the effort • QWERTY is not suitable

  11. Source: Anshuman Kumar

  12. Without help p (one tailed) Nokia (0.208) Samsung (0.195) Sony (0.001) Total p (one tailed) Nokia (0.000) Samsung (0.010) Sony (0.000) Task Success /5 Users

  13. Disha

  14. Swarachakra

  15. Inscript

  16. Oct 2013 Jun 2013 Aug 2013 Jan 2014

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