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Tiresias (typeface)
Encyclopedia
Tiresias is a family of TrueType
realist sans-serif typeface
s that were designed for best legibility by people with impaired vision at the Scientific Research Unit of Royal National Institute of the Blind
in London. The research basis of Tiresias Screenfont’s legibility claims have been called into question.
Tiresias is the font used in subtitles for digital terrestrial television (DVB-T
) in the UK and the Sky Digital
satellite service (DVB-S
) targeting the UK and Ireland.
The family includes
In late 2007, all Tiresias fonts except Tiresias Screenfont were released under the GNU General Public License
version 3 or any later version.
TrueType
TrueType is an outline font standard originally developed by Apple Computer in the late 1980s as a competitor to Adobe's Type 1 fonts used in PostScript...
realist sans-serif typeface
Typeface
In typography, a typeface is the artistic representation or interpretation of characters; it is the way the type looks. Each type is designed and there are thousands of different typefaces in existence, with new ones being developed constantly....
s that were designed for best legibility by people with impaired vision at the Scientific Research Unit of Royal National Institute of the Blind
Royal National Institute of the Blind
RNIB is a UK charity offering information, support and advice to almost two million people in the UK with sight loss.- History :The Royal National Institute of Blind People was founded by Thomas Rhodes Armitage, a successful doctor who suffered from eyesight problems.In 1868 Dr Armitage founded an...
in London. The research basis of Tiresias Screenfont’s legibility claims have been called into question.
Tiresias is the font used in subtitles for digital terrestrial television (DVB-T
DVB-T
DVB-T is an abbreviation for Digital Video Broadcasting — Terrestrial; it is the DVB European-based consortium standard for the broadcast transmission of digital terrestrial television that was first published in 1997 and first broadcast in the UK in 1998...
) in the UK and the Sky Digital
Sky Digital (UK & Ireland)
Sky is the brand name for British Sky Broadcasting's digital satellite television and radio service, transmitted from SES Astra satellites located at 28.2° east and Eutelsat's Eurobird 1 satellite at 28.5°E. The service was originally launched as Sky Digital, distinguishing it from the original...
satellite service (DVB-S
DVB-S
DVB-S is an abbreviation for Digital Video Broadcasting — Satellite; it is the original Digital Video Broadcasting forward error coding and demodulation standard for satellite television and dates from 1994, in its first release, while development lasted from 1993 to 1997...
) targeting the UK and Ireland.
The family includes
- Tiresias Infofont – for information labels, optimized for maximum legibility at a distance of 30–100 cm.
- Tiresias Keyfont – for labeling the tops of keys of keyboards, PIN pads, appliances, remote controls (features exaggerated punctuation marks)
- Tiresias LPfont – for large-print publications
- Tiresias PCfont – for raster displays
- Tiresias Screenfont – for television subtitling and on-screen user interfaces
- Tiresias Signfont – a more open spacing for use on signs
In late 2007, all Tiresias fonts except Tiresias Screenfont were released under the GNU General Public License
GNU General Public License
The GNU General Public License is the most widely used free software license, originally written by Richard Stallman for the GNU Project....
version 3 or any later version.