Method to distribute speech resources in a media server

• US 8,015,304 B2
• Filed: 12/12/2005
• Issued: 09/06/2011
• Est. Priority Date: 12/12/2005
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Nusbickel, Wendi L.
• Primary Examiner(s): Najjar; Saleh
• Assistant Examiner(s): Shepperd; Eric W
• Application Number:
  US11/164,929
• Publication Number:
  US 20070136414A1
• Time in Patent Office: 2,094 Days
• Field of Search: 709/203, 709/230, 709/231, 709/219, 370/466, 370/469
• US Class Current: 709/230
• CPC Class Codes: H04L 67/02 based on web technology, e.g. hypertext transfer protocol [HTTP]
• CPC Class Codes: H04L 67/1001 for accessing one among a plurality of replicated servers
• CPC Class Codes: H04L 67/1014 based on the content of a request
• CPC Class Codes: H04L 69/08 Protocols for interworking; Protocol conversion

Abstract

A method and a system for distributing media processing resources. A first request formatted in accordance with a first protocol can be received from a client requesting a media processing resource. The first request can be morphed into a second request that is formatted in accordance with a second protocol. Further, a media processing resource can be selected from a plurality of available media processing resources, and the second request can be forwarded to the selected media processing resource in accordance with the second protocol.

Claims

1. A method of distributing speech resources comprising:

establishing a user session between a client and a server via a first protocol;

receiving, at the server, a first request from the client requesting a media processing resource, said first request being formatted in accordance with Media Resource Control Protocol (MRCP);

morphing the first request into a second request formatted in accordance with Hypertext Transfer Protocol (HTTP) by;

replacing in a Real Time Streaming Protocol (RTSP) portion of the first request a line of code comprising terms “

ANNOUNCE rtsp”

with HTTP specific code, and

replacing in an MRCP portion of the first request a line of code comprising the term “

SPEAK”

with a line of code comprising terms “

MRCPMethod;

Speak”

;

wherein the HTTP specific code enables a plurality of media processing resources distributed across a plurality of server nodes to respond to the second request;

selecting at least one of the plurality of media processing resources from the plurality of media processing resources; and

forwarding the second request to the selected at least one media processing resource in accordance with HTTP;

wherein said morphing is performed at a server-side node functioning as an intermediary between the client and the selected at least one media processing resource.

2. The method of claim 1, wherein said step of selecting the at least one of the plurality of media processing resources comprises selecting a media servlet associated with the selected at least one media processing resource.

3. The method of claim 2, further comprising establishing a client session with the media servlet.

4. The method of claim 3, further comprising supporting the client session with cookies or URL rewriting.

5. The method of claim 1, further comprising:

receiving from the selected at least one media processing resource a first event generated in response to the second request, the first event being formatted in accordance with HTTP;

morphing the first event into a second event formatted in accordance with MRCP by replacing HTTP specific code with correlating MRCP specific code; and

forwarding the second event to the client in accordance with MRCP.

6. The method of claim 5, further comprising establishing a client session with a media servlet associated with the selected at least one media processing resource and communicating from the media servlet to a callback servlet a session identifier identifying the client.

7. The method of claim 6, wherein said step of morphing the first event into the second event comprises associating the session identifier with the second event.

8. The method of claim 1, further comprising:

defining the first protocol to be a Real Time Streaming Protocol (RTSP); and

wherein morphing the first request into a second request formatted in accordance with HTTP, further comprises combining code specified in HTTP with code located in the MRCP message.

9. The method of claim 1, further comprising:

removing from the RTSP portion of the first request a line of code comprising the term “

Content-Type” and

a line of code comprising the term “

Content-Length”

.

10. A machine readable storage device having stored thereon a computer a computer-readable program code configured to perform:

establishing a user session between a client and a server via a first protocol;

receiving, at the server, a first request from the client requesting a media processing resource, the first request being formatted in accordance with Media Resource Control Protocol (MRCP);

morphing the first request into a second request formatted in accordance with Hypertext Transfer Protocol (HTTP) by;

replacing in a Real Time Streaming Protocol (RTSP) portion of the first request a line of code comprising terms “

ANNOUNCE rise”

with HTTP specific code, and

replacing in an MRCP portion of the first request a line of code comprising the term “

SPEAK”

with a line of code comprising terms “

MRCPMethod;

Speak”

;

wherein the HTTP specific code enables a plurality of media processing resources distributed across a plurality of server nodes to respond to the second request;

selecting at least one of the plurality of media processing resources from the plurality of media processing resources; and

forwarding the second request to the selected at least one media processing resource in accordance with HTTP;

wherein said morphing is performed at a server-side node functioning as an intermediary between the client and the selected at least one media processing resource.

11. The machine readable storage device of claim 10, wherein selecting the at least one of the plurality of media processing resources comprises code for selecting a media servlet associated with the selected at least one media processing resource.

12. The machine readable storage of claim 11, further comprising code for establishing a client session with the media servlet.

13. The machine readable storage of claim 12, further comprising code for supporting the client session with cookies or URL rewriting.

14. The machine readable storage device of claim 10, further comprising computer-readable program code configured to perform:

receiving from the selected at least one media processing resource a first event generated in response to the second request, the first event being formatted in accordance with HTTP;

morphing the first event into a second event formatted in accordance with MRCP by replacing HTTP specific code with correlating MRCP specific code; and

forwarding the second event to the client in accordance with MRCP.

15. The machine readable storage device of claim 14, further comprising computer-readable program code configured to perform:

establishing a client session with a media servlet associated with the selected at least one media processing resource and

communicating from the media servlet to a callback servlet a session identifier identifying the client.

16. A system for distributing speech resources comprising:

a protocol morpher configured to;

establish a user session with a client;

receive a first request from the client requesting a media processing resource, the first request being formatted in accordance with Media Resource Control Protocol (MRCP);

morph the first request into a second request formatted in accordance with Hypertext Transfer Protocol (HTTP) by;

replacing in a Real Time Streaming Protocol (RTSP) portion of the first request a line of code comprising terms “

ANNOUNCE rtsp”

with HTTP specific code, and

replacing in an MRCP portion of the first request a line of code comprising the term “

SPEAK”

with a line of code comprising terms “

MRCPMethod;

Speak”

;

wherein the HTTP specific code enables a plurality of media processing resources distributed across a plurality of server nodes to respond to the second request;

select at least one of the plurality of media processing resources that are available from the plurality of media processing resources; and

forward the second request to the selected at least one media processing resource in accordance with HTTP;

wherein said protocol morpher is located at a server-side node functioning as an intermediary between the client and the selected at least one media processing resource.

17. The system of claim 16, wherein the protocol morpher selects a servlet associated with the selected at least one media processing resource.

18. The system of claim 17, wherein the media servlet establishes a client session with the protocol morpher.

19. The system of claim 18, wherein the protocol morpher supports the client session with cookies or URL rewriting.

20. The system of claim 16, wherein the protocol morpher further receives from the selected at least one media processing resource a first event generated in response to the second request, the first event being formatted in accordance with HTTP, morphs the first event into a second event formatted in accordance with MRCP by replacing

HTTP specific code with correlating MRCP specific code, and forwards the second event to the client in accordance with MRCP.

21. The system of claim 20, further comprising a media servlet associated with the selected at least one media processing resource, the media servlet establishing a client session and communicating to a callback servlet a session identifier identifying the client.