Text parser for use with a text-to-speech converter

• US 5,555,343 A
• Filed: 04/07/1995
• Issued: 09/10/1996
• Est. Priority Date: 11/18/1992
• Status: Expired due to Term

• Current Assignee: Canon Information Systems Incorporated (Canon Inc.)
• Original Assignee: Canon Information Systems Incorporated (Canon Inc.)
• Inventors: Luther, Willis J.
• Primary Examiner(s): MacDonald, Allen R.
• Assistant Examiner(s): Sartori, Michael A.
• Application Number:
  US08/418,872
• Time in Patent Office: 522 Days
• Field of Search: 395/2, 395/2.67, 395/2.69, 395/2.7, 395/2.76, 395/2.77, 381/52, 381/53
• US Class Current: 704/260
• CPC Class Codes: G06F 3/16 Sound input; Sound output speech processing G10L
• CPC Class Codes: G10L 13/08 Text analysis or generation of parameters for speech synthesis out of text, e.g. grapheme to phoneme translation, prosody generation or stress or intonation determination

Abstract

A text parser for a text-to-speech processor accepts a text stream and parses the text stream to detect non-spoken characters and spoken characters. The spoken characters are passed to the text-to-speech converter and are not altered. A text generator generates pre-designated text sequences in response to non-spoken characters, such as special character sequences or character sequences which match format templates. A speech command generator generates speech commands in response to detecting of non-spoken characters such as non-spoken characters which affect text style, font, underlining, etc. The text-to-speech converter converts spoken text parsed by the parser and text generated by the text generator into speech, the text-to-speech converter being operable in response to speech commands generated by the speech command generator. According to the invention, it is not necessary to pre-process text files in preparation for text-to-speech conversion, and arbitrary files which contain both spoken and non-spoken characters may be converted easily.

Claims

1. A text processor for a text-to-speech converter comprising:

a parser for accepting a text stream, for parsing the text stream to detect an unspoken character having a first characteristic, an unspoken character having a second characteristic, and spoken characters, and for not altering the spoken characters in the text stream;

a text generator, responsive to detection of an unspoken character having the first characteristic, for generating a pre-designated text sequence, and for replacing, in the text stream, said unspoken character having said first characteristic with said pre-designated text sequence; and

a speech command generator, responsive to detection of an unspoken character having a second characteristic, for generating pre-designated speech commands.

2. A text processor according to claim 1, further comprising a look-up table of spoken characters, wherein said parser detects unspoken characters by reference to said look-up table.

3. A text processor according to claim 1, wherein said parser includes a pointer for pointing to an input position in an input character buffer, said text stream comprising characters pointed to by said pointer.

4. A text processor according to claim 1, further comprising a look-up table, wherein the first characteristic is determined by reference to said look-up table.

5. A text processor according to claim 1, further comprising a look-up table, wherein said text generator generates text in accordance with said look-up table.

6. A text processor according to claim 5, wherein said look-up table is comprised by pre-designated text associated with text mark-up codes.

7. A text processor according to claim 6, wherein said table is further comprised by speech commands associated with text mark-up codes, said speech command generator generating speech commands in response to speech commands in the look-up table.

8. A text processor according to claim 5, wherein the look-up table is comprised by pre-designated text associated with punctuation and arithmetic symbols.

9. A text processor according to claim 8, wherein said table is further comprised by speech commands associated with punctuation and arithmetic symbols, said speech command generator generating speech commands in response to speech commands in the look-up table.

10. A text processor according to claim 5, wherein said look-up table is comprised by format templates.

11. A text processor according to claim 10, wherein said format templates further include embedded speech commands, said speech command generator generating speech commands based on said embedded speech commands.

12. A text processor according to claim 1, further comprising a look-up table, wherein the second characteristic is determined by reference to said look-up table.

13. A text processor according to claim 12, wherein said speech command generator generates speech commands in accordance with the look-up table.

14. A text processor according to claim 13, wherein said look-up table is comprised by speech commands associated with text mark-up codes.

15. A text processor according to claim 14, wherein said table is further comprised by pre-designated text associated with text mark-up codes, said text generator generating text in response to the pre-designated text in the look-up table.

16. A text processor according to claim 13, wherein the look-up table is comprised by speech commands associated with punctuation and arithmetic symbols.

17. A text processor according to claim 16, wherein said table is further comprised by pre-designated text associated with punctuation and arithmetic symbols, said text generator generating text in response to pre-designated text in the look-up table.

18. A text processor according to claim 13, wherein said look-up table is comprised by format templates.

19. A text processor according to claim 18, wherein said format templates include speech commands having embedded pre-designated text, said text generator generating text based on said embedded pre-designated text.

20. A text processor according to claim 1, further comprising a text-to-speech interface which receives spoken text parsed by said parser, text generated by said text generator, and speech commands generated by said speech command generator.

21. A text processor according to claim 20, wherein said text-to-speech interface is comprised by an output buffer for sequentially storing spoken text parsed by said parser, text generated by said text generator, and speech commands generated by said speech command generator.

22. A text processor according to claim 1, wherein the text stream is comprised by a stream of hexadecimal codes such as ASCII codes for each character in the text stream.

23. A text-to-speech processor comprising:

an input buffer for storing characters;

a text-to-speech interface for receiving a text stream and speech commands, whereby characters in the text stream may be converted into speech whose characteristics are controlled by the speech commands;

a parser including a pointer that points to characters in said input buffer, said parser for parsing characters at the pointer'"'"'s position to detect unspoken characters and spoken characters, said parser sending spoken characters to said text-to-speech interface without altering the spoken characters;

a text generator for generating pre-designated text sequences in response to detection of unspoken characters having a first characteristic, for replacing, in the text stream, said unspoken characters having said first characteristic with said pre-designated text sequences, and for sending the generated text sequences to said text-to-speech interface;

means for updating the position of said pointer; and

a speech command generator for generating speech commands in response to detection of unspoken characters having a second characteristic, and for sending the generated speech commands to said text-to-speech interface.

24. A text-to-speech processor according to claim 23, further comprising a look-up table, wherein the first characteristic is determined by reference to said look-up table.

25. A text-to-speech processor according to claim 24, wherein said text generator generates text in accordance with said look-up table.

26. A text-to-speech processor according to claim 25, wherein said look-up table is comprised by pre-designated text associated with text mark-up codes.

27. A text-to-speech processor according to claim 26, wherein said table is further comprised by speech commands associated with text mark-up codes, said speech command generator generating speech commands in response to speech commands in the look-up table.

28. A text-to-speech processor according to claim 25, wherein the look-up table is comprised by pre-designated text associated with punctuation and arithmetic symbols.

29. A text-to-speech processor according to claim 28, wherein said table is further comprised by speech commands associated with punctuation and arithmetic symbols, said speech command generator generating speech commands in response to speech commands in the look-up table.

30. A text-to-speech processor according to claim 25, wherein said look-up table is comprised by format templates.

31. A text-to-speech processor according to claim 30, wherein said format templates further include embedded speech commands, said speech command generator generating speech commands based on said embedded speech commands.

32. A text-to-speech processor according to claim 23, further comprising a look-up table, wherein said second characteristic is determined by reference to said look-up table.

33. A text-to-speech processor according to claim 32, wherein said speech command generator generates speech in accordance with the look-up table.

34. A text-to-speech processor according to claim 33, wherein said look-up table is comprised by speech commands associated with text mark-up codes.

35. A text-to-speech processor according to claim 34, wherein said table is further comprised by pre-designated text associated with text mark-up codes, said text generator generating text in response to the pre-designated text in the look-up table.

36. A text-to-speech processor according to claim 33, wherein the look-up table is comprised by speech commands associated with punctuation and arithmetic symbols.

37. A text-to-speech processor according to claim 36, wherein said table is further comprised by pre-designated text associated with punctuation and arithmetic symbols, said text generator generating text in response to pre-designated text in the look-up table.

38. A text-to-speech processor according to claim 33, wherein said look-up table is comprised by format templates.

39. A text-to-speech processor according to claim 38, wherein said format templates further include speech commands having embedded pre-designated text, said text generator generating text based on said embedded pre-designated text.

40. A text-to-speech processor according to claim 23, further comprising a look-up table of spoken characters, wherein said parser detects unspoken characters by reference to said look-up table of spoken characters.

41. A text-to-speech processor according to claim 23, further comprising a voice telephone interface for receiving speech generated by said text-to-speech converter and for putting the generated speech on a voice telephone line.

42. A text-to-speech processor according to claim 41, wherein said voice telephone interface includes a DTMF decoder for decoding DTMF text positioning commands.

43. A text-to-speech processor according to claim 42, wherein said parser repositions its pointer in said input buffer in accordance with the decoded positioning commands.

44. A text-to-speech processor according to claim 23, further comprising means for providing pointer positioning commands, wherein said parser repositions said pointer in said input buffer based on said positioning commands.

45. A text-to-speech processor according to claim 44, wherein said means for providing pointer positioning commands is a graphical user interface.

46. A text-to-speech processor according to claim 23, wherein the text stream is comprised by a stream of hexadecimal codes such as ASCII codes for each character in the text stream.

47. A text-to-speech processing apparatus comprising:

a processing unit including a computer for executing stored program process steps;

a memory for storing plural files which include text and for storing process steps for execution by said processing unit; and

a text-to-speech converter for converting characters in a text stream into speech and for executing speech commands;

wherein said process steps include steps

to select one of the data files stored in said memory,

to advance a pointer through the selected data file,

to parse characters at the pointer'"'"'s position to detect in the text stream unspoken characters and spoken characters,

to feed the spoken characters to said text-to-speech converter,

to generate pre-designated text sequences in response to detection of unspoken characters,

to replace, within said text stream, said unspoken characters with said pre-designated text sequences,

to feed the replaced text stream to said text-to-speech converter,

to generate speech commands in response to detection of unspoken characters, and

to feed the generated speech commands to said text-to-speech converter for execution thereby,

whereby text in the selected data file is converted to speech.

48. A text-to-speech processing apparatus according to claim 47, further comprising interface means for accessing remote text files, wherein said process steps include process steps to store the remotely accessed text file in said memory.

49. A text-to-speech processing apparatus according to claim 48, wherein said interface means includes a LAN interface for accessing local area network files.

50. A text-to-speech processing apparatus according to claim 48, wherein said interface means includes a modem for downloading binary data files modulated on a voice telephone line.

51. A text-to-speech processing apparatus according to claim 48, wherein said interface means includes a facsimile interface, and wherein said process steps include process steps to perform optical character recognition on received facsimiles and to store resulting text into said memory.

52. A text-to-speech processing apparatus according to claim 47 further comprising a look-up table stored in said memory, wherein text is generated in accordance with said look-up table.

53. A text-to-speech processing apparatus according to claim 52, wherein said look-up table is comprised by pre-designated text associated with text mark-up codes.

54. A text-to-speech processing apparatus according to claim 53, wherein said table is further comprised by speech commands associated with text mark-up codes, wherein speech commands are generated in response to speech commands in the look-up table.

55. A text-to-speech processing apparatus according to claim 52, wherein the look-up table is comprised by pre-designated text associated with punctuation and arithmetic symbols.

56. A text-to-speech processing apparatus according to claim 55, wherein said table is further comprised by speech commands associated with punctuation and arithmetic symbols text mark-up codes, wherein speech commands are generated in response to speech commands in the look-up table.

57. A text-to-speech processing apparatus according to claim 52, wherein said look-up table is comprised by format templates.

58. A text-to-speech processing apparatus according to claim 57, wherein embedded speech commands are included in the text for said format templates, wherein speech commands are generated based on the embedded speech commands.

59. A text-to-speech processing apparatus according to claim 47, further comprising a look-up table stored in said memory, wherein said speech commands are generated in accordance with said look-up table.

60. A text-to-speech processing apparatus according to claim 59, wherein said look-up table is comprised by speech commands associated with text mark-up codes.

61. A text-to-speech processing apparatus according to claim 60, wherein said table is further comprised by pre-designated text associated with text mark-up codes, wherein speech commands are generated in response to speech commands in the look-up table.

62. A text-to-speech processing apparatus according to claim 59, wherein the look-up table is comprised by speech commands associated with punctuation and arithmetic symbols.

63. A text-to-speech processing apparatus according to claim 62, wherein said table is further comprised by pre-designated text associated with text mark-up codes, wherein text is generated in response to pre-designated text in the look-up table.

64. A text-to-speech processing apparatus according to claim 59, wherein said look-up table is comprised by format templates.

65. A text-to-speech processing apparatus according to claim 64, wherein said format templates further include speech commands having embedded pre-designated text, and wherein text is generated based on said embedded pre-designated text.

66. A text-to-speech processing apparatus according to claim 47, further comprising a look-up table of spoken characters, wherein unspoken characters are detected by reference to said look-up table.

67. A text-to-speech processing apparatus according to claim 47, further comprising a voice telephone interface for receiving speech generated by said text-to-speech converter and for putting the generated speech on a voice telephone line.

68. A text-to-speech processing apparatus according to claim 67, wherein said voice telephone interface includes a DTMF decoder for decoding DTMF text positioning commands.

69. A text-to-speech processing apparatus according to claim 68, wherein said decoder provides decoded positioning commands, and wherein said processing unit repositions said pointer in accordance with said decoded positioning commands.

70. A text-to-speech processing apparatus according to claim 69, wherein the process steps stored in said memory further include process steps to reposition the pointer based on said positioning commands.

71. A text-to-speech processing apparatus according to claim 70, further comprising a graphical user interface, wherein said positioning commands are provided by said graphical user interface.

72. A text-to-speech processing apparatus according to claim 47, wherein the text stream is comprised by a stream of hexadecimal codes such as ASCII codes for each character in the text stream.

73. A text processor for a text-to-speech converter comprising:

a parser for accepting a text stream, for parsing the text stream to detect a control character having a pre-defined characteristic, for parsing the text stream to detect spoken characters, and for not altering the spoken characters in the text stream;

a look-up table, said look-up table providing a pre-designated text sequence associated with said pre-defined characteristic, wherein said pre-defined characteristic is determined by reference to said look-up table; and

a text generator, responsive to detection of said control character having the pre-defined characteristic, for generating said pre-designated text sequence, and for replacing, in the text stream, said control character having said pre-defined characteristic with said pre-designated text sequence.

74. A text processor according to claim 73, further including a speech command generator for generating pre-designated speech commands, said speech command generator being responsive to the detection of a control character having a second characteristic for generating said pre-designated speech commands.

75. A text processor according to claim 74, wherein said pre-defined characteristic corresponds to text mark-up codes, said look-up table being further comprised by speech commands associated with said text mark-up codes, said speech command generator generating said pre-designated speech commands in response to said speech commands in said look-up table.

76. A text processor according to claim 74, wherein said pre-defined characteristic corresponds to punctuation and arithmetic symbols, said look-up table being further comprised by speech commands associated with said symbols, and said speech command generator generating said pre-designated speech commands in response to said speech commands in said look-up table.

77. A text processor according to claim 74, wherein said second characteristic is determined by reference to a second look-up table.

78. A text processor according to claim 77, wherein said speech command generator generates said pre-designated speech commands in accordance with said second look-up table.

79. A text processor according to claim 73, wherein the text stream is comprised by a stream of hexadecimal codes such as ASCII codes for each character in the text stream.

80. Apparatus for converting text into speech comprising:

a memory for storing plural format templates, each of said plural format templates having both format data and at least one wild card field, said memory also storing pre-designated text which corresponds to format data for each format template;

a parser for parsing a text stream to determine whether a character string in the text stream matches one of the plural format templates, for parsing the text stream to detect spoken characters, and for not altering the spoken characters in the text stream;

a text generator responsive to a determination by said parser that a character string in the text stream matches one of the plural templates by replacing, the text stream, format data from the character string which matches format data from said one of the plural templates with corresponding pre-designated text, said text generator leaving unaltered text in the character string corresponding to each wild card field; and

a text-to-speech converter for converting the text stream, including the replaced pre-designated text and the unaltered text, into speech.

81. Apparatus according to claim 80, further comprising a speech command generator, and wherein said memory also stores speech commands associated with said pre-designated text, said speech command generator generating pre-designated speech commands in response to a matching character string.

82. Apparatus according to claim 80, wherein the text stream is comprised by a stream of hexadecimal codes such as ASCII codes for each character in the text stream.