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Extension of Coding of User Requirements

Discussion Document


Dr. John Gill
February 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.snapi.org.uk/info/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/equipment/eb9.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/equipment/eb19.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

  1. Collate all suggestions for additional features.
  2. Test experimentally the proposals which relate to interactive television and next generation networks (the latter may involve Wizard of Oz studies).
  3. Prepare detailed coding proposal in the format used by EN 1332-4.
  4. Submit proposal to CEN TC 224 WG6.


Sources of Information

EN 1332-4 Identification card systems - Man-machine interface - Part 4: Coding of user requirements for people with special needs.

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.

 



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