Method and apparatus for determining character and character mode for multi-lingual keyboard based on input characters

• US 5,634,134 A
• Filed: 06/19/1992
• Issued: 05/27/1997
• Est. Priority Date: 06/19/1991
• Status: Expired due to Term

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Nakajima, Akira, Taniguchi, Shigeki, Matsuda, Yasumasa, Kawase, Masaki, Suzuki, Toyokazu, Kashiwa, Hirobumi, Ito, Jun, Kumai, Hiroyuki
• Primary Examiner(s): Hayes, Gail O.
• Assistant Examiner(s): Yount, Steven R.
• Application Number:
  US07/901,236
• Time in Patent Office: 1,803 Days
• Field of Search: 364/419.02, 364/419.03, 364/419.14, 364/419.08, 364/419.07, 364/419.06, 364/419.16, 364/419.09, 364/419.12
• US Class Current: 715/223
• CPC Class Codes: B41J 3/46 Printing mechanisms combined with apparatus providing a visual indication
• CPC Class Codes: B41J 5/10 Arrangements of keyboards , e.g. key button disposition
• CPC Class Codes: G06F 40/123 Storage facilities
• CPC Class Codes: G06F 40/263 Language identification
• CPC Class Codes: G06F 40/53 Processing of non-Latin text kana-to-kanji conversion G06F40/129; vowelisation G06F40/232

Abstract

A method and apparatus for determining at least one of a character and a destination therefor in accordance with a received signal representing at least one of a plurality of characters and at least one character corresponding to at least one of a plurality of languages. Likelihood values for at least one of plurality of characters and each of the languages are evaluated, and at least one of the plurality of characters and one of the character languages are selected in accordance with the evaluated likelihood values thereof.

Claims

1. A method of determining at least one character in response to a received signal representing at least one character of a plurality of characters generated by utilizing an input device including a keyboard having said plurality of characters corresponding to at least one of a plurality of languages, the signal being generated by selection of at least one of the character keys, said method comprising the steps, executed by a processing apparatus, of:

receiving said signal representing at least one character of said plurality of characters;

evaluating likelihood values corresponding to said signal,

wherein the step of evaluating includes assigning likelihood values for each of said plurality of characters represented by said signal and each of a plurality of character destinations represented by said signal, and effecting evaluation of the assigned likelihood values; and

selecting at least one character of said plurality of characters determined in accordance with the evaluated likelihood values.

2. A method according to claim 1, wherein each character key is indicative of a plurality of characters representing different languages.

3. A method according to claim 1, wherein the step of assigning likelihood values includes the steps of holding received signals sequentially and assigning a likelihood value at least one of in accordance with the continuity between one held signal and the next held signal and in accordance with the frequency of each signal.

4. A method according to claim 1, wherein said likelihood values are determined using a statistical method.

5. A method according to claim 1, wherein the keyboard includes a plurality of character mode keys, one of the character mode keys being set for selecting said at least one character of said plurality of characters of the selected character key which is used for generating said signal, and further comprising the step of displaying the character in accordance with the set character mode key and selected character key.

6. A method according to claim 5, further comprising the step of displaying a message in addition to the displayed character.

7. A method according to claim 6, wherein the step of displaying a message includes displaying a message indicating the possibility that a displayed character is an incorrect character based upon the evaluated likelihood values.

8. A method according to claim 7, wherein the displayed message requests a user to at least one of verify that a correct character mode has been selected and to effect changeover to a correct character mode.

9. A method according to claim 7, further comprising the step of changing the displayed character displayed in accordance with the set character mode key to a correct character display based upon the evaluation of the likelihood values for the displayed character.

10. A method according to claim 9, further comprising the step of outputting the correct character for processing based upon the likelihood value evaluation.

11. A method according to claim 5, wherein the step of evaluating includes converting said received signal into character codes for each of the plurality of characters and evaluating the likelihood values for the respective character codes, and the step of selecting includes selecting a character code in accordance with the evaluated likelihood values and enabling changing of a character mode when the evaluated likelihood values for a character code is determined to be different from a character code for the set character mode.

12. A method according to claim 11, wherein the step of enabling changing of a character mode is effected upon evaluation of a predetermined number of received signals representing a character string of characters, displaying the characters corresponding to the set character mode in accordance with the received signals and upon determining that a different character mode should utilized, at least one of displaying a message that the character mode should be changed and effecting change of the character mode.

13. A method according to claim 12, wherein upon determining that a different character mode should be utilized, displaying a message indicative thereof.

14. A method according to claim 12, wherein after displaying a message indicative that the character mode should be changed, enabling a user to effect change of a character mode and displaying the characters in accordance with the changed character mode.

15. A method according to claim 14, further comprising the step of enabling processing of characters of the received signals in accordance with the changed character mode.

16. A method according to claim 12, wherein the evaluation of a predetermined number of received signals includes effecting a summation of likelihood values for the predetermined number of received signals for a respective character mode and effecting comparison among the summations for the respective character modes.

17. A method according to claim 16, wherein the summation includes predetermined threshold values.

18. A method according to claim 1, wherein said received signal represents a plurality of destinations for a character to which the received signal is transmittable, and the step of selecting includes selecting the likeliest destination for the received signal in accordance with the evaluated assigned likelihood values thereof.

19. A method according to claim 18, wherein each signal represents a character having destinations corresponding to different languages.

20. A method according to claim 18, wherein the step of evaluating includes effecting evaluation upon receipt of a predetermined number of signals representing a character string of characters and displaying the characters of the string, and the step of selecting includes displaying a message indicative of a destination based upon the likelihood values.

21. An apparatus for determining at least one character in response to a received signal representing at least one character of a plurality of characters generated by utilizing an input device including a keyboard having said plurality of characters corresponding to at least one of a plurality of languages, the signal being generated by selection of at least one of the character keys, comprising:

means for receiving said signal representing at least one character of said plurality of characters from said input device;

means for evaluating likelihood values corresponding to said signal,

wherein said means for evaluating includes means for assigning likelihood values for each of said plurality of characters represented by said signal and each of the plurality of character destinations represented by said signal, and means for effecting evaluation of the assigned likelihood values; and

means for selecting at least one character of said plurality of characters determined in accordance with the evaluated likelihood values.

22. An apparatus according to claim 21, wherein each character key is indicative of a plurality of characters representing different languages.

23. An apparatus according to claim 21, wherein said means for assigning likelihood values includes means for holding received signals sequentially and for assigning a likelihood value at least one of in accordance with the continuity between one held signal and the next held signal and in accordance with the frequency of each signal.

24. An apparatus according to claim 21, wherein said likelihood values are determined using a statistical method.

25. An apparatus according to claim 21, wherein the keyboard includes a plurality of character mode keys, one of the character mode keys being set for selecting said at least one character of said plurality of characters of the selected character key which is used for generating said signal, and further comprising display means for displaying the character in accordance with the set character mode key and selected character key.

26. An apparatus according to claim 25, wherein said display means displays a message in addition to the displayed character.

27. An apparatus according to claim 26, wherein the displayed message requests a user to take steps to at least one of verify that a correct character mode has been selected and to effect changeover to a correct character mode.

28. An apparatus according to claim 26, wherein said display means displays a message indicating the possibility that a displayed character is an incorrect character based upon the evaluation of likelihood values.

29. An apparatus according to claim 28, further comprising means for changing the displayed character displayed in accordance with the set character mode key to a correct character display based upon the evaluation of the likelihood values for the displayed character.

30. An apparatus according to claim 29, further comprising means for outputting the correct character for processing based upon the likelihood value evaluation.

31. An apparatus according to claim 25, wherein said means for evaluating includes means for converting said received signal into character codes for each of the plurality of characters and for evaluating the likelihood values for the respective character codes, and the means for selecting includes means for selecting a character code in accordance with the evaluated likelihood values and enabling changing of a character mode when the evaluated likelihood values for a character code is determined to be different from a character code for the set character mode.

32. An apparatus according to claim 31, wherein said means for enabling changing of a character mode enables changing upon evaluation of a predetermined number of received signals representing a character string of characters, said display means displaying the characters corresponding to the set character mode in accordance with the received signals and upon determining that a different character mode should utilized, at least one of displaying a message that the character mode should be changed and effecting change of the character mode.

33. An apparatus according to claim 32, wherein the display means upon determining that a different character mode should be utilized, displays a message indicative thereof.

34. An apparatus according to claim 32, wherein after said display means displays a message indicative that the character mode should be changed, said means for enabling enables a user to effect change of a character mode and the display means displays the characters in accordance with the changed character mode.

35. An apparatus according to claim 34, further comprising processing means for enabling processing of characters of the received signals in accordance with the changed character mode.

36. An apparatus according to claim 32, wherein said means for enabling changing signals includes means for effecting a summation of likelihood values for the predetermined number of received signals for a respective character mode and for effecting comparison among the summations for the respective character modes.

37. An apparatus according to claim 21, wherein said means for effecting summation includes utilizing predetermined threshold values.

38. An apparatus according to claim 21, wherein the received signal represents a plurality of destinations for a character to which the received signal is transmittable, and said means for selecting enables selection of the likeliest destination for the received signal in accordance with the evaluated assigned likelihood values thereof.

39. An apparatus according to claim 38, wherein each signal represents a character having destinations corresponding to different languages.

40. An apparatus according to claim 38, wherein said means for evaluating includes means for effecting evaluation upon receipt of a predetermined number of signals representing a character string of characters, and further comprising means for displaying the characters of the string and a message indicative of a destination based upon the likelihood values.