Speaker-specific speech-to-text/text-to-speech communication system with hypertext-indicated speech parameter changes

• US 6,035,273 A
• Filed: 06/26/1996
• Issued: 03/07/2000
• Est. Priority Date: 06/26/1996
• Status: Expired due to Term

• Current Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Original Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Inventors: Spies, Carl Joseph
• Primary Examiner(s): Hudspeth, David R.
• Assistant Examiner(s): Smits, Talivaldis Ivars
• Application Number:
  US08/673,242
• Time in Patent Office: 1,350 Days
• Field of Search: 704/235, 704/260, 704/270
• US Class Current: 704/270
• CPC Class Codes: G10L 15/07 to the speaker
• CPC Class Codes: G10L 19/0018 Speech coding using phonetic or linguistical decoding of the source; Reconstruction using text-to-speech synthesis

Abstract

The invention consists of speech compression and transmission devices (CTD) connected to one another for transmission of signals therebetween via any transmission media including the public switched telephone network, a cellular network, a satellite or submarine communications system or any combination of such existing networks and systems. Each CTD consists of a speech profile defining the coefficients of speech for any person that will be using that device, a means for converting speech to text, and a means for converting text to speech based on the speech profile. When a connection is established between the devices, the speech profiles of the calling party and the called parties are exchanged such that the calling party'"'"'s CTD stores in RAM the called party'"'"'s speech profile and the called party'"'"'s CTD stores in RAM the calling party'"'"'s speech profile. When either one of the parties speaks, that party'"'"'s speech is converted into text. Changes in picth, rate, and volume of the speech are detected, and the amount of change indicated by hypertext characters inserted in the text. The text is transmitted from the speaking party'"'"'s device to the listening party'"'"'s device where it is converted back into speech using the speaking party'"'"'s speech profile. Because speech typically occurs at a rate of between 4 and 5 words per second with an average of 4.2 characters per word, normal speech generates approximately 20 characters per second. Assuming the formatted text uses 8 bits to define a character such as for standard ASCII text plus hypertext characters, the system of the invention transmit speech at a data rate of 160-300 bits per second, a data rate significantly lower than known speech compression techniques.

Claims

1. A compressed voice communication system, comprising:

at least two customer premise devices connected by a transmission media for allowing signals to be transmitted between said customer premise devices;

each of said at least two customer premise devices comprising;

means for receiving speech from an individual;

a speech profile defining coefficients of speech for the individual in a mathematical model;

means for detecting changes in the individual'"'"'s speech, said changes being defined by at least one of said coefficients of speech;

means for converting said speech to text which operates in response to means for detecting to add hypertext characters to said text indicative of said detected changes;

means for transmitting said text from one customer premise device over said transmission media for receipt at another one of the at least two customer premise devices;

means for converting said text received from said transmission media to speech; and

means for delivering speech to the individual.

2. The system according to claim 1, wherein said transmission media includes a satellite system.

3. The system according to claim 1, wherein said transmission media includes a cellular network.

4. The system according to claim 1, wherein said transmission media includes a public switched telephone network.

5. The system according to claim 1, wherein said means for receiving speech from an individual includes a microphone for converting the speech into an electrical signal.

6. The system according to claim 5, wherein each of said at least two customer premise devices further include a codec for converting said electrical signal into a digital signal.

7. The system according to claim 1, wherein said means for delivering speech to the individual includes a speaker for converting an electrical signal into speech.

8. The system according to claim 1, wherein said means for converting said speech to text uses said speech profile to create said text.

9. The system according to claim 1, wherein said means for converting text received from said transmission media to speech uses the speech profile of the individual whose speech is being converted.

10. The system according to claim 1, wherein each of said at least two customer premise devices include means for storing a speech profile of said individual.

11. A device for compressing and transmitting speech in a communications system, comprising:

means for receiving speech from an individual;

a speech profile defining the coefficients of speech for the individual in a mathematical model;

means for detecting changes in the individual'"'"'s speech, said changes being defined by at least one of said coefficients of speech;

means for converting said speech to text which operates in response to means for detecting to add hypertext characters to said text indicative of said detected changes;

means for transmitting said text over said transmission media;

means for converting said text received from said transmission media to speech; and

means for delivering speech to the individual.

12. The device according to claim 11, wherein said transmission media includes a satellite system.

13. The device according to claim 11, wherein said transmission media includes a cellular network.

14. The device according to claim 11 wherein said transmission media includes a public switched telephone network.

15. The device according to claim 11, wherein said means for receiving speech from an individual includes a microphone for converting the speech into an electrical signal.

16. The device according to claim 15, including a codec for converting said electrical signal into a digital signal.

17. The device according to claim 11, wherein said means for delivering speech to the individual includes a speaker for converting an electrical signal into speech.

18. The device according to claim 11, wherein said means for converting said speech to text uses said speech profile to create said text.

19. The device according to claim 11, wherein said means for converting text received from said transmission media to speech uses the speech profile of the individual whose speech is being converted.

20. The device according to claim 11, further including means for storing a speech profile of said individual.

21. A compressed voice communication system, comprising:

at least one customer premise device connected to a first device for compressing and transmitting speech;

at least one other customer premise device connected to a second device for compressing and transmitting speech;

a transmission media connecting said first and second devices for compressing and transmitting speech for transmitting signals therebetween;

each of said first and second devices for compressing and transmitting speech, comprising;

means for receiving speech from said at least one customer premise device;

a speech profile defining coefficients of speech for an individual in a mathematical model;

means for detecting changes in the individual'"'"'s speech, said changes being defined by at least one of said coefficients of speech;

means for converting said speech to text which operates in response to said means for detecting to add hypertext characters to said text indicative of said detected changes;

means for transmitting said text over said transmission media;

means for converting text received from said transmission media to speech; and

means for delivering speech to said at least one customer premise device.

22. The system according to claim 21, wherein said transmission media includes a satellite system.

23. The system according to claim 21, wherein said transmission media includes a cellular network.

24. The system according to claim 21, wherein said transmission media includes a public switched telephone network.

25. The system according to claim 21, wherein said first and second devices include means for storing a speech profile representative of an individual'"'"'s speech.

26. The system according to claim 21, wherein each of said first and second devices further include a codec for converting said electrical signal into a digital signal.

27. The system according to claim 21, wherein said means for converting said speech to text uses said speech profile to create said text.

28. The system according to claim 21, wherein said means for converting text received from said transmission media to speech uses the speech profile of the individual whose speech is being converted.

29. In a voice communication system having at least a first speech compression and transmission device and a second speech compression and transmission device connected by a transmission media for transmitting signals therebetween, a method for transmitting compressed speech comprising the steps of:

defining a first speech profile for a first individual and storing said first speech profile in said first speech compression and transmission device;

defining a second profile for a second individual and storing said second speech profile in said second speech compression and transmnission device;

establishing a connection between said first speech compression and transmission device and said second speech compression and transmission device;

detecting changes in the individual'"'"'s speech;

adding hypertext characters to the text in response to the detected changes;

transmitting said first speech profile to the second speech compression and transmission device and transmitting said second speech profile to the first speech compression and transmission device;

receiving speech from said first individual and converting the speech to text using the first speech profile at said first speech compression and transmission device;

transmitting said text from the first speech compression and transmission device to the second speech compression and transmission device; and

converting the text received from the first speech compression and transmission device to speech at the second speech compression and transmission device using the first transmitted speech profile.

30. The method of claim 29, wherein the step of detecting changes includes the step of detecting pitch and rate.