System and method for text entry on a reduced keyboard

• US 7,256,769 B2
• Filed: 02/24/2003
• Issued: 08/14/2007
• Est. Priority Date: 02/24/2003
• Status: Expired due to Fees

• Current Assignee: Zi Corporation (Cerence Inc.)
• Original Assignee: ZI Corporation of Canada Incorporated (Cerence Inc.)
• Inventors: Pun, Samuel Yin Lun, Paek, Eun-Kyong, Conrad, John M., Xu, Changshi
• Primary Examiner(s): Tran; Henry N
• Application Number:
  US10/373,280
• Publication Number:
  US 20040164951A1
• Time in Patent Office: 1,632 Days
• Field of Search: 345/156, 345/168, 345/169, 345171-173, 345/2.3, 345/467, 700/14, 700/17, 700/84, 341/22, 341/26, 341/182, 455/566, 400/109, 400/477, 285/466, 285/145.R
• US Class Current: 345/171
• CPC Class Codes: G06F 3/0233 Character input methods

Abstract

A system and method for efficient Asian character text input into a reduced keypad machine such as a word processor, telephone, hand-held computer, or personal computer is provided. The system comprises a data entry keypad associated with a monitor, and a disambiguation process supporting multiple keycap depression timespan range definitions and interpretations to produce accurate messaging with a reduced keypad.

Claims

1. A text input system comprising:

a user input device having a plurality of user-actuable keys, each said key displaying one or more Asian character elements for selection by a user, each said key being associated with at least one character element of an Asian language character and each said key also being associated with a suggested candidate, character or word, each said key also being actuable for a variable timespan range for building an Asian character or word from said Asian character elements; and

a keypress interpretation process for determining the duration of the variable timespan range and comparing said duration to a plurality of timespan ranges, at least one of which represents a character element selection by a user, another of which represents a candidate selection by said user, and said keypress interpretation process displaying, in response to selections by said user, further suggested candidates allowing the user to build an Asian character or word from one or more of its Asian character elements.

2. The system of claim 1 wherein said candidate selection timespan range is longer than said character element selection timespan range.

3. The system of claim 1 further comprising a user output device for echoing an output from said keypress interpretation process.

4. The system of claim 3 wherein said user output device is an electronic display, said electronic display having at least a user choice display area and a candidate display area.

5. The system of claim 1 wherein said user input device further comprises numeric keys and control keys, said numeric keys enabling character element selection and candidate selection, said control keys enabling functions, said functions including spacing, deletion, and candidate selection.

6. The system of claim 1 wherein said user input device further comprises a keypad having at least ten numeric keys and at least two control keys, said numeric keys being assigned to one or more character elements.

7. The system of claim 6 further comprising a memory, said memory storing one or more relationships between said character elements and said numeric keys, said memory storing one or more relationships between said character elements and said candidates.

8. The text input system as defined in claim 1 wherein said Asian character elements are Korean Hangul jamos including at least one of a consonant, a vowel and a candidate or word.

10. The system of claim 8 further comprising a user output device for echoing an output from said keypress interpretation processor.

11. The system of claim 10 wherein said user output device is an electronic display, said electronic display having at least a user choice display area and a candidate display area.

12. The system of claim 8 wherein said user input device further comprises numeric keys and control keys, said numeric keys enabling character element selection and candidate selection, said control keys enabling functions, said functions including spacing, deletion, and candidate selection.

13. The system of claim 8 wherein said user input device further comprises a keypad having at least ten numeric keys and at least two control keys, said numeric keys being assigned to one or more character elements.

14. The system of claim 13 further comprising a memory, said memory storing one or more relationships between said character elements and said numeric keys, said memory storing one or more relationships between said character elements and said candidates.

9. A wireless telephone system for text input comprising:

a user input device having a plurality of user-actuable keys, each said key displaying one or more Asian character elements for selection by a user, each said key being associated with at least one character element of an Asian language character, and each said key also being associated with a suggested candidate, each said key also being actuable for a variable timespan range for building an Asian character or word from said Asian character elements; and

a keypress interpretation process for determining the duration of the variable timespan range and comparing said duration to a plurality of timespan ranges, at least one of which represents a character element selection by a user, another of which represents a candidate selection, and said keypress interpretation process displaying, in response to selections by said user, further suggested candidates allowing the user to build an Asian character or word from one or more of its Asian character elements.

15. The system of claim 9 wherein said candidate selection timespan range is longer than said character element selection timespan range.

16. A method for processing electronic entry of text comprising:

receiving user input into a front end process, said front end process interfacing with a user input device, said user input device having at least one user-actuable key, said key being actuable for a variable timespan range, and each key being associated with at least one Asian character element;

determining the duration of the variable timespan range;

comparing said duration to a plurality of minimum timespan ranges, at least one of which represents a character element selection, another of which represents a candidate character or word selection; and

displaying, in response to selections by said user, further suggested candidates allowing the user to build an Asian character or word from one or more of its Asian character elements.

17. The method of claim 16 including the further step of displaying said user input on a user output device, said user output device being an electronic display, said electronic display having at least a user choice display area and a candidate display area.

18. The method of claim 16 wherein said user input device further comprises numeric keys and control keys, said numeric keys enabling character element selection and candidate selection, said control keys enabling functions, said function including spacing, deletion, and candidate selection.

19. The method of claim 16 wherein said user input device further comprises a keypad having at least ten numeric keys and at least two control keys, said numeric keys being assigned to one or more character elements.

20. The method of claim 19 further comprising

storing one or more relationships between said character elements and said numeric keys in a memory;

and

storing one or more relationships between said character elements and said candidate in said memory.

21. The method as defined in claim 20 including the further step of storing as said relationship between said character elements and said numeric keys, a list of predictive choices based upon the probability of use of a particular character element.

22. The method as defined in claim 20 including the further step of storing as said relationship between said character element and said candidates, a list of predictive choices based upon the probability that a particular candidate is intended when a particular character element is selected.

23. The computer readable medium comprising electronic instructions for carrying out the method of claim 16.

24. The method of claim 16 wherein said candidate selection timespan range is longer than said character element selection timespan range.