LetterWise is a patented [1] keyboard for predictive text input on portable devices , developed by Eatoni Ergonomics.
Content
- 1 Design
- 1.1 Example
- 2 Memory / Storage Requirements
- 3 Chinese LetterWise
- 4 See also
- 5 notes
Design
Unlike other predictive text input systems, LetterWise is not dependent on a dictionary that allows the user to type anything, but with very high efficiency. Being a very easy-to-use system, without Multi-tap- style timeouts or dictionary restrictions, its instruction manual consists of just one sentence:
“Press the key with the desired letter, if it does not appear, press“ Next ”until it appears.”
Example
Typing sirs
Press “7” once for “s”
Press “4” once, then “Next” for “i”
Press “7” once for “r”
Press “7” once for “s”
Memory / Storage Requirements
LetterWise has been found on many resource-limited systems (such as cordless or satellite phones) where dictionary-based solutions are not suitable due to memory or storage limitations. In the repository that is usually required for a single dictionary database (30–100 KB), you can easily place LetterWise databases for 10–20 different languages. RAM requirements are equally low, usually less than 2 KB, there is an implementation for 200 bytes of available memory [2] .
Chinese LetterWise
Chinese LetterWise is essentially a two-level version of the LetterWise alphabet where you enter phonetic characters (like pinyin or bopomofo ) at the first level, and they are automatically converted to Chinese letter for which you have a second level key (Next Hanzi) [3] .
See also
- iTap
- Predictive text input
- T9
- Wordwise
Notes
- ↑ Method and apparatus for improved multi-tap text input. US Patent 6,219,731 (2001)
- ↑ How much memory does LetterWise require? Archived July 10, 2011.
- ↑ Chinese LetterWise text entry example. Archived January 5, 2009.