Source-dependent text-to-speech system

• US 20040225501A1
• Filed: 05/09/2003
• Published: 11/11/2004
• Est. Priority Date: 05/09/2003
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Cutaia, Nicholas J.
• Granted Patent: US 8,005,677 B2
• Time in Patent Office: Days
• US Class Current: 704/260
• CPC Class Codes: G10L 13/033 Voice editing, e.g. manipulating the voice of the synthesiser
• CPC Class Codes: G10L 13/047 Architecture of speech synthesisers

Abstract

A method of generating speech from text messages includes determining a speech feature vector for a voice associated with a source of a text message, and comparing the speech feature vector to speaker models. The method also includes selecting one of the speaker models as a preferred match for the voice based on the comparison, and generating speech from the text message based on the selected speaker model.

Claims

1. A method of generating speech from text messages, comprising:

determining a speech feature vector for a voice associated with a source of a text message;

comparing the speech feature vector to a plurality of speaker models;

based on the comparison, selecting one of the speaker models as a preferred match for the voice; and

generating speech from the text message based on the selected speaker model.

2. The method of claim 1, wherein the step of determining comprises:

receiving a sample of the voice; and

analyzing the sample to determine the speech feature vector for the voice.

3. The method of claim 1, wherein the step of determining comprises:

requesting an endpoint that is the source of the text message to provide the speech feature vector; and

receiving the speech feature vector from the endpoint.

4. The method of claim 1, wherein the step of generating comprises communicating a command to generate the speech to a text-to-speech server, the command comprising the selected speaker model, wherein the text-to-speech server generates the speech based on the selected speaker model.

5. The method of claim 1, wherein:

the speech feature vector comprises a feature vectors for a Gaussian mixture model; and

the step of comparing comprises comparing a first Gaussian mixture model associated with the speech feature vector with a plurality of second Gaussian mixture models, each second Gaussian mixture model associated with at least one of the speaker models.

6. The method of claim 1, further comprising:

generating a plurality of model voice samples; and

analyzing the model voice samples to determine the speaker model for each model voice sample.

7. The method of claim 6, wherein the model voice samples are generated based on a text sample associated with the voice sample.

8. The method of claim 1, wherein the steps of the method are implemented by an endpoint in a communication network.

9. The method of claim 1, wherein the steps of the method are implemented in a voice match server in a communication network.

10. The method of claim 1, wherein:

the steps of the method are implemented in a unified messaging system; and

the speech feature vector is associated with a user that provided the text message in a user profile.

11. A voice match server, comprising:

an interface operable to;

receive a speech feature vector for a voice associated with a source of a text message; and

communicate a command to a text-to-speech server instructing the text-to-speech server to generate speech from the text message based on a selected speaker model; and

a processor operable to;

compare the speech feature vector to a plurality of speaker models; and

select one of the speaker models as a preferred match for the voice based on the comparison.

12. The server of claim 11, further comprising a memory operable to store the plurality of speaker models.

13. The server of claim 11, wherein:

the interface is further operable to cause the text-to-speech server to generate a plurality of model voice samples; and

the speaker models are determined based on analysis of the model voice samples.

14. The server of claim 13, wherein the model voice samples are generated based on a text sample associated with the voice sample.

15. The server of claim 11, wherein:

the interface is further operable to communicate a request for the speech feature vector to an endpoint that is the source of the text message; and

the interface receives the speech feature vector from the endpoint.

16. The server of claim 11, wherein:

the speech feature vector comprises a feature vector for a Gaussian mixture model; and

the step of comparing comprises comparing a first Gaussian mixture model associated with the speech feature vector to a plurality of second Gaussian mixture models, each second Gaussian mixture model associated with at least one of the speaker models.

17. The server of claim 11, wherein:

the server is part of a unified messaging system; and

the speech feature vector is associated with a user that provided the text message in a user profile.

18. An endpoint, comprising:

a first interface operable to receive a text message from a source; and

a processor operable to;

determine a speech feature vector for a voice associated with a source of the text message;

compare the speech feature vector to a plurality of speaker models;

select one of the speaker models as a preferred match for the voice based on the comparison; and

generate speech from the text message based on the selected speaker model; and

a second interface operable to output the generated speech to a user.

19. The endpoint of claim 18, wherein the first interface is further operable to:

communicate a request for the speech feature vector to the source of the text message; and

receive the speech feature vector in response to the request.

20. The endpoint of claim 18, wherein:

the first interface is further operable to receive a voice sample from the source of the text message; and

the processor is further operable to analyze the voice sample to determine the speech feature vector.

21. The endpoint of claim 18, wherein:

the first interface is further operable to receive speech from the source of the text message;

the second interface is further operable to output the received speech; and

the processor is further operable to analyze the received speech to determine the speech feature vector.

22. A system, comprising:

a voice match server operable to;

compare a speech feature vector to a plurality of speaker models; and

select one of the speaker models as a preferred match for the voice based on the comparison; and

a text-to-speech server operable to generate speech from a text message based on the selected speaker model.

23. The system of claim 22, further comprising a speech feature vector server operable to:

receive speech; and

determine an associated speech feature vector based on the speech, wherein the speech feature vector compared by the voice match server is received from the speech feature vector server.

24. The system of claim 22, wherein the voice match server is further operable to receive the speaker models from the speech feature vector server.

25. The system of claim 24, wherein:

the voice match server is further operable to cause the text-to-speech server to generate a plurality of model voice samples; and

the speech feature vector server is further operable to analyze the voice samples to determine the speaker models.

26. The system of claim 22, wherein:

the text-to-speech server is one of a plurality of text-to-speech servers, each text-to-speech server operable to generate speech using a different speaker model; and

the voice match server is further operable to select one of the text-to-speech servers to generate speech based on which text-to-speech server uses the selected speaker model.

27. Software embodied in a computer-readable medium, operable to perform the steps of:

determining a speech feature vector for a voice associated with a source of a text message;

comparing the speech feature vector to a plurality of speaker models;

based on the comparison, selecting one of the speaker models as a preferred match for the voice; and

generating speech from the text message based on the selected speaker model.

28. The software of claim 27, wherein the step of determining comprises:

receiving a sample of the voice; and

analyzing the sample to determine the speech feature vector for the voice.

29. The software of claim 27, wherein the step of determining comprises:

requesting an endpoint that is the source of the text message to provide the speech feature vector; and

receiving the speech feature vector from the endpoint.

30. The software of claim 27, further operable to perform the steps of:

generating a plurality of model voice samples; and

analyzing the model voice samples to determine the speaker model for each model voice sample.

31. A system, comprising:

means for determining a speech feature vector for a voice associated with a source of a text message;

means for comparing the speech feature vector to a plurality of speaker models;

means for selecting one of the speaker models as a preferred match for the voice based on the comparison; and

means for generating speech from the text message based on the selected speaker model.

32. The system of claim 31, wherein the means for determining comprise:

means for receiving a sample of the voice; and

means for analyzing the sample to determine the speech feature vector for the voice.

33. The system of claim 31, wherein the means for determining comprise:

means for requesting an endpoint that is the source of the text message to provide the speech feature vector; and

means for receiving the speech feature vector from the endpoint.

34. The system of claim 31, further comprising:

means for generating a plurality of model voice samples; and

means for analyzing the model voice samples to determine the speaker model for each model voice sample.