Extension of Coding of User Requirements
A Discussion Document
Dr. John Gill, Chief Scientist, RNIBFebruary 2003
(revised January 2004)
Introduction
The European Standard EN 1332-4 Identification Card Systems - Man-machine Interface: Coding of User Requirements for People with Special Needs (www.tiresias.org/reports/en1332_4.htm) was written at a time when the main relevant application areas were financial transactions (eg at an ATM), fixed line telecommunications and public transport. However the standard is now five years old and needs to be revised to take into account a range of new systems such as mobile telecommunications, interactive television and computer access.
This document summarises the features in the present standard and the new features which have been proposed so far (written in blue). Please send in any suggestions for additional features which you think should be included in the revised standard.
Features
| 1. | Symbols |
| Text required | |
| Symbols requested | |
| Sign language required | |
| Braille output required | |
| No animation | |
| Symbol size | |
| Symbol colour (white, red, orange, yellow, green, blue, purple, black) | |
| 2. | Character size |
| Height of character in millimetres | |
| Double height characters | |
| 3. | Screen colour |
| Preferred colour for text (white, red, orange, yellow, green, blue, purple, black) | |
| Preferred colour for background (white, red, orange, yellow, green, blue, purple, black) | |
| Reversed text/background contrast | |
| 4. | Colour avoidance |
| Avoid display of information in red | |
| Avoid red/green | |
| Avoid blue/yello | |
| Maximum contrast monchrome | |
| 5. | Position of screen |
| Height in decimetres from ground or floor level | |
| 6. | Voice output |
| Loudspeaker output required | |
| Headset output required | |
| Hearing aid - magnetic inductive coupling required | |
| Audible output on key press (eg beep, speech) | |
| Convert icons to speech | |
| Convert icons to earcons | |
| Audible output of route or destination | |
| Wireless interface (eg Bluetooth, IEEE 802.11b, HiperLAN2, DECT) | |
| 7. | Sound amplification |
| Offset amount in dBA from the terminal's normal sound level | |
| 8. | High frequency amplification |
| Offset amount in dBA from the terminal's normal sound level | |
| 9. | Low frequency amplification |
| Offset amount in dBA from the terminal's normal sound level | |
| 10. | Input requirements |
| Voice input required (letter by letter, words, natural language) | |
| Keyboard input required (programmable shortcuts) | |
| Finger guiding devices (frames or funnels) | |
| PIN pad top row denotes 1, 2, 3 | |
| PIN pad top row denotes 7, 8, 9 | |
| Sticky keys | |
| Repeat keys (eg auto-repeat when held down) | |
| Auto delay for repeat keys | |
| Debounce | |
| Alphanumeric layout (eg QWERTY, alphabetic) | |
| Chording input (eg multiple key input for Braille) | |
| Pointing device (eg mouse, tracker ball) | |
| Touch screen | |
| On-screen keyboard | |
| Voice recognition software | |
| Microphone gain | |
| Dictation settings | |
| Vocabulary | |
| Feedback on voice input | |
| Wireless (eg Blutooth, IEEE 802.11b, HiperLAN, DECT) | |
| 11. | Touch screen |
| Large button size required | |
| Very large button size required | |
| Finger entring touch-sensitive area | |
| Finger exiting touch-sensitive area | |
| 12. | Position of input device |
| Desired height in decimetres from ground level | |
| 13. | Time-outs |
| Number of seconds of time required before a time-out or a series of time-outs come into force | |
| 14. | Language |
| Up to 4 preferred languages in order of user preference (coded in accordance to ISO 639) | |
| 15. | Interface complexity level |
| Simplified dialogue level required | |
| Very simplified dialogue required | |
| Simplified text required | |
| Very simplified text required | |
| Low text density required | |
| Very low text density required | |
| 16. | Screenreader |
| Preferred screen reader (eg Jaws, Opera) | |
| Common settings for screenreaders | |
| (A list of screenreaders is at www.tiresias.org/research/devices/screen_reading.htm.) | |
| 17. | Links |
| Speak link | |
| Different voice | |
| Sound effect | |
| 18. | Speech rate |
| Preferred maximum speech output speed in words per minute | |
| 19. | Screen enhancement software |
| Preferred screen enhancement software (eg ZoomText) | |
(A list of magnification software is at www.tiresias.org/research/devices/screen_magnification.htm) |
|
| 20. | Font |
| Preferred generic characteristics (eg serif, sans serif, monospaced) | |
| Preferred fonts (up to 4 in order of user preference) | |
| No moving or flashing text | |
| 21. | Icons |
| Enlarge icons | |
| Increase contrast | |
| Show text description | |
| 22. | Cursor |
| Preferred size | |
| Preferred shape | |
| Preferred colour | |
| Preferred tracking | |
| 23. | Pointing device |
| Preferred pointing device (eg mouse, tracker ball, joystick) | |
| Double-click speed | |
| Handedness (eg left-handed or right-handed) | |
| Button assignment | |
| 24. | Caret |
| Preferred size | |
| Preferred shape | |
| Preferred colour | |
| Preferred tracking | |
| 25. | Text reading highlight |
| Common settings for text reading (as it is read by a speech synthesiser) with highlighting | |
| 26. | ALT text |
| Speak the ALT text | |
|
27. |
Speech output of non-alphanumeric characters |
| Speak tabs | |
| Speak punctuation | |
| Speak links | |
| Speak buttons | |
| 28. | Braille display |
| Contractions (eg Grade 1 or 2) | |
| Number of dots in a cell (eg 6 or 8) | |
| Number of active cells | |
| Mark highlighted text | |
| Mark bold text | |
| Mark underlined text | |
| Mark italic text | |
| Mark strikeout text | |
| Mark coloured text | |
| Back pressure on pins | |
| Status cell (eg left, right or none) | |
| 29. | Tactile display (touch or haptic) |
| Type of display | |
| Preferred software driver | |
| 30. | Captions (subtitles) |
| Preferred maximum speed of presentation | |
| Preferred veiling (ie level of transparency of background) | |
| Enhanced caption (eg include description of sound effects) | |
| 31. | Audio description |
| Level of description | |
| 32. | Clean sound (ie no background noise) |
| 33. | Menu selection mode |
| 34. | Scrolling mode |
| Scrolling wheel, Up/Down, Left/Right buttons | |
| 35. | Animation |
| Turn off all animation | |
| Slow down animation | |
| 36. | Biometrics |
| Use PIN instead of specific biometric | |
| Cannot use specific biometric | |
| Preferred biometric | |
| 37. | Digital signature |
The Next Steps
- Collate all suggestions for additional features.
- Test experimentally the proposals which relate to interactive television and next generation networks (the latter may involve Wizard of Oz studies).
- Prepare detailed coding proposal in the format used by EN 1332-4.
- Submit proposal to CEN TC 224 WG6.
Sources of Information
Gill, J. M. & Perera, S. (2003) Accessible universal design of interactive digital television. [accessed 29/08/07].
IMS learner information package accessibility for LIP information model
Acknowledgements: Contributions have been made by A. Leibert, K.
Nordby and S. Perera.
Last updated: 20.11.2009 © Copyright reserved Website design: Digital Accessibility Team