Ambiguous Word Correction on Reduced Keyboards
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Solution Overview
Problem
Handheld electronic devices with reduced keyboards face challenges in disambiguating ambiguous word inputs, leading to incorrect word selections and increased review time due to limitations in existing keystroke interpretation systems and disambiguation software.
Innovation Solution
A method and device for ambiguous word review or correction using a touch screen, where a processor renders word representations, detects ambiguous words, displays visual indicators, and allows users to magnify and select alternatives through touch screen interactions or a virtual track ball, enabling quick correction of errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a reduced keyboard with multiple characters per key is used, then the device compactness and key count are improved, but the ambiguity of word input increases
Solution Approach 1:
The system performs preliminary disambiguation by displaying multiple possible words that can be formed from a given key sequence before the user completes input. This allows the user to review and select the intended word, preventing ambiguous input from being sent without clarification.
Solution Approach 2:
The system provides feedback to the user by displaying the list of possible words that correspond to the current key sequence. This feedback loop allows the user to see what words are being generated and actively select the correct one, resolving the ambiguity.
2Productivity
If disambiguation software with frequency-based prediction is used, then the text entry speed is improved, but the accuracy of word selection deteriorates
Solution Approach 1:
The system displays not just the single most likely word but multiple possible words (a partial list of alternatives) that could result from the input. This excessive listing of options ensures that even if frequency prediction is wrong, the user can still find and select the correct word from the displayed alternatives.
3Speed
If automatic disambiguation is used without user review, then the operation speed is improved, but the error rate increases
Solution Approach 1:
The system performs preliminary display of possible words after key input but before final confirmation. This intermediate step allows quick visual verification without requiring complete re-typing, maintaining speed while enabling accuracy checking.
Solution Approach 2:
The user can quickly self-correct by simply viewing the displayed alternatives and mentally selecting the correct word, or by using a quick confirmation mechanism. This self-service approach is faster than complete re-typing while ensuring accuracy.
4Ease of operation
If a touch screen interface is added for word selection, then the ease of word correction is improved, but the device complexity increases
Solution Approach 1:
The system merges the physical keyboard with a touch screen display, allowing users to interact with both input and display interfaces simultaneously. This combination enables easy word selection through touch while maintaining the compact form factor.
Solution Approach 2:
The touch screen serves multiple functions: displaying the current input, showing alternative words, providing visual feedback, and enabling selection. This multi-functionality reduces the need for separate physical controls, managing complexity through versatile interface elements.
Data Source
AI summary
A method of ambiguous word review or correction for a handheld electronic device includes receiving a plurality of actuations of input members in which each of a number of these members has a plurality of assigned characters, rendering a plurality of words responsive to the actuations, displaying a plurality of representations of the words, and detecting a number of the words, which are ambiguous. For each of the detected number, a visual indicator is displayed associated with a corresponding one of the representations. Touching of a touch screen is detected in connection with the displayed visual indicator. Preferably, a first magnification of the corresponding representation and a second magnification of a representation of a number of alternative words are displayed. The touch screen can be used to select one of the first and second magnifications to correct the ambiguous word.