Patent Publication Number: US-7725116-B2

Title: Techniques for combining voice with wireless text short message services

Description:
CROSS-REFERENCE TO RELATED CASES 
   This application is a continuation of application Ser. No. 11/019,754 filed on Dec. 21, 2004 now U.S. Pat. No. 7,184,786, allowed on Jul. 3, 2006 and claims the benefit of U.S. Provisional Patent Application No. 60/532,075, entitled “Techniques for combining voice with wireless text short message services,” filed Dec. 23, 2003. 

   FIELD OF THE INVENTION 
   The present invention relates generally to sending and receiving of short messages between wireless telephony users, and, more specifically the addition of speech capabilities to standard text messaging systems creating a multimodal SMS service. 
   BACKGROUND OF THE INVENTION 
   In addition to the usual wireless telephony that cellular telephones provide, such devices are also widely used for sending short text messages (under the name Short Message Services or SMS) between wireless users. 
   More recently new devices and supporting network services are being introduced that allow more general class of messages to be sent between wireless devices, where the messages include voice, still images, and even moving images. Standards have been introduced for such services including Multimedia Message Services (MMS) and Enhanced Message Services (EMS). 
   However, as attractive as such new services are to users and wireless network providers, they require new and expensive wireless devices, of which few have been deployed to customers, as well as extensive additional network capabilities. Further, these new services do not inter-operate with existing SMS services in a seamless manner. 
   In view of the foregoing discussion there is a need for a system that can overcome the drawbacks of these new services and provide comparable advanced capabilities using only the inexpensive devices and networks currently available to support standard text SMS and that seamlessly inter-operate with SMS services. 
   Further, the disclosure herein is not limited to wireless phones but will also work with wireline phones with SMS capabilities and services over such wireline devices. 
   SUMMARY OF THE INVENTION 
   The present invention provides a Multimodal SMS mechanism (MultimodalSMS) combining speech, or other modalities (such as image or video data), with standard text SMS. This mechanism allows users to send and receive voice messages associated directly with text SMS messages. The mechanism can be applied using standard wireless telephone devices capable of sending and receiving SMS text messages and can be extended to many other device types, and network technologies. 
   A system according the invention preferably includes one or more of the following components: user input and/or output devices including those capable of playing and recording speech and those capable of entering and displaying text information; a speech recognition engine with an additional capability of recording voice; a text-to-speech engine for rendering text into spoken words; an application server for the MultimodalSMS service that uses the speech engines to combine speech with text messages created using one the input devices and sending such combined messages to a device that provides one or more of the output capabilities. The system also may include other network components such as a Short Message Service Center (SMSC) and a Multimodal Platform. 
   The text input device is used to compose a message to be sent using standard SMS technology. The MutlimodalSMS application combines the text message (if any) with a spoken message if desired by the user. The combined message is sent to recipient(s) who then can read the text message and retrieve, from the application server, the associated voice message. The speech recognition engine may be used for easy control of the playback and recording of voice messages as well as the control of other useful messaging function. 
   The SMSC provides a standard mechanism for transmitting SMS text messages and is also used to transmit or to insert the link into the text messages that allow connection to the speech server. The Multimodal Platform, which may be the Kirusa MultiModal Platform (KMMP), provides control and synchronization of modalities as needed. KMMP is presently provided by Kirusa, Inc., of Edison, N.J., U.S.A. KMMP is described in “Kirusa Sequential and SMS Multimodality,” and at http://kirusa.com/products 13  kms 13  cv.php. 
   Other features are described below. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The foregoing summary, as well as the following detailed description of preferred embodiments, is better understood when read in conjunction with the appended drawings. For the purpose of illustrating the invention, there is shown in the drawings example constructions of the invention; however, the invention is not limited to the specific methods and instrumentalities disclosed. In the drawings: 
       FIG. 1  is a flow and block diagram showing how a MultimodalSMS is created by a user device, transmitted through the network and received by a second user device; and 
       FIG. 2  is flow and block diagram of features of the invention deployed in a wireless telephone network. The MultimodalSMS application is shown in accordance with aspects of the invention. A Speech Platform and Multimodal Platform supporting the application within a wireless network illustrate the architecture of the invention. 
   

   DETAILED DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS 
     FIG. 1  an overview of the process(es)  100  for creating, sending and receiving a MultimodalSMS message in accordance with the invention and shows one context in which a MultimodalSMS message may be used. 
   The following four application scenarios expand on what is outlined in  FIG. 1 . 
   An application scenario is a sequence of user actions, spanning a single or multiple modes. For example, a user may start the application in data mode and then switch to voice mode. Multiple application scenarios can be supported using a platform described herein. Switching between modes can be actuated via user and/or application control. And, most importantly, these scenarios can be supported from a single application code base and a single platform. In each of the following scenarios both Alice and Bob are wireless subscribers, and each operates a wireless telephone  110 ,  120 , where the wireless telephones and other components are capable of communicating through a wireless network  122 : 
   1. Alice sends a text SMS  112  to Bob and Bob replies with voice using a MultimodalSMS. 
   2. Alice receives  124  a MultimodalSMS from Bob, reads the text, and clicks the MultimodalSMS link to retrieve  130  and hear the voice portion of the message. 
   3. Bob connects to the MultimodalSMS application  108  and records a voice message for Alice. A MultimodalSMS is sent to Alice, containing a link  114  to the voice message left by Bob. 
   4. Alice calls in and chooses to listen to her SMS messages. 
   Scenario 1: In this scenario, Alice sends a text SMS message to Bob, which may be sent through the Short Message Service Center (SMSC)  118 . Bob receives and views  116  the SMS message and chooses to respond with a MultimodalSMS message. Bob chooses to reply using voice, clicks on the MultimodalSMS link that is embedded in the SMS message, and records his voice message. The MultimodalSMS service also allows Bob to: 
   Listen to other MultimodalSMS messages 
   Delete the message or other Multimodal SMS messages 
   Forward this and other MultimodalSMS messages 
   It should be noted that the link embedded in an SMS message can be created at the sending device, or by using the Multimodal Platform  134  to SMSC  118  link, or by using a modified SMSC  118 . In a preferred embodiment, the Multimodal Platform  134  adds the links. 
   Scenario 2: For this scenario, Alice receives a text SMS notifying her that Bob has sent her a MultimodalSMS. Alice clicks on the link embedded in the SMS message to listen to the voice message. After she has heard the message, she has four options: 
   Reply to the message using voice in a MultimodalSMS message 
   Reply to the message with text 
   Delete the message 
   Forward the message as a MultimodalSMS message containing voice and any original text 
   Scenario 3: In this example, Bob initiates a MultimodalSMS message to send to Alice. He connects to the MultimodalSMS application and speaks Alice&#39;s number, then records and sends his MultimodalSMS message (which may include, possibly, creating a voice message  104 ). Alice receives an SMS message with an embedded link which she can activate to listen  126  to the message. 
   Scenario 4: In this scenario, Alice wishes to listen to her text-based SMS messages. She is driving or unable to view her mobile screen. She calls a number and then is led through a series of voice prompts that enable her to access, select, and listen to the text, rendered by the Text-to-Speech (TTS) component of the Speech Server  106 , (and any recorded speech) in the MultimodalSMS messages that she has received. Once again, she has four options: 
   Reply to the message with a MultimodalSMS message containing voice ( 128 ) 
   Reply to the message with text ( 128 ) 
   Delete the message 
   Forward the message as a MultimodalSMS message containing voice and any original text. 
     FIG. 2  shows an example architecture in which illustrative components of the invention may be used and/or deployed. It is assumed that any conventional protocols mentioned in the drawing are known in the art, and thus detailed description of such is not provided herein. 
   An example process of creating a MultimodalSMS is as follows. To create a MultimodalSMS message the user of the telephone device  202  first creates any text message she wishes to send, including an empty message, and determines to whom the message is to be sent using whatever mechanisms are provided by the device  202 . If she wishes to add speech to the SMS message, she clicks on a MultimodalSMS link in her phone book, or similar mechanism provided by the device, which connects her through the voice network  204  to the Multimodal Platform  134  (such as KMMP). Instructions are provided to allow her to record her voice message through the Speech Platform  206 . The recorded voice message is then stored for future retrieval in database  214 . The specific storage mechanism used may include a Media Server, a database or any other storage mechanism  107  that facilitates storing audio content. She then sends the SMS message which is transmitted through the SMS network  204  to the Short Message Service Center (SMSC)  118  which transmits the message to the recipient and also communicates a link within the message that allows the Multimodal Platform  134  to uniquely associate the SMS message and the stored voice message. (SMSC  118  may include, for example, an interface  216  that allows SMSC  118  to communicate with multimodal platform  134 .) In a preferred embodiment, voice is sent as part of an SMS message by including within the SMS message a link to retrieve the voice message from another location (e.g., the SMS message may contain a link to the Multimodal Platform  134  which, when accessed, causes the voice message to be retrieved from the Speech Platform  206  (or from a media server or database); alternatively, the link may be to any other location, wherein the user is led through any series of events to obtain the voice message). 
   When the message is received by the user at the other end of the connection there is a telephony link embedded in the message that, using whatever method is available on the recipients&#39;device, once accessed, connects the recipient to the Multimodal Platform  134  which retrieves the voice message from the Speech Server (or from a media server or database) and plays it to the recipient. 
   At that point the recipient has a number of options provided by the MultimodalSMS Application  108 . These may include a voice reply, a text SMS reply or deletion of the message stored on the server. 
   In other illustrative embodiments of the invention more complex scenarios are possible. 
   The MultimodalSMS application may provide a user with the capability of storing, editing and applying lists of recipients so that a message can be distributed to a number of recipients. These lists would be stored in the application Database  214 . Such lists could be entered by conventional means or could be uploaded to the network. Once stored the lists could be used for addressing MultimodalSMS or even standard text SMS messages. 
   Instead of composing the text SMS message in advance, the invention also envisions addition of text material to a voice message while a voice connection is active to the Speech Server. This would preferably be done using a Unstructured Supplementary Services Data (USSD) channel which is a standard low-bit-rate channel that can be active, if enabled by the network provider, simultaneously with a voice connection. (This can also be accomplished by using SMS technology to directly send an SMS.) Those skilled in the art will also realize that other mechanisms inherent in current devices and networks can be used to simultaneously encode and send the small text messages required, while a voice connection is active. 
   A further exemplary capability is the storage of preset or standard messages (“canned” messages) that could be stored in the database and maintained using a web or Wireless Application Protocol (WAP) interface. Once stored these messages would be accessible using the voice interface already provided as part of MultimodalSMS. 
   If contacts are stored in the device, rather than in the network, they can also be used in addressing a MultimodalSMS message. They could be accessed as part of the Multimodal application, by using an application on the device or through the use of USSD as previously described. If a buddy list, used with a Push-to-talk (PTT) capable device, is available that list can be used for sending a MultimodalSMS and it also can be used for sending a voice message to a buddy who is off-line using the PTT capability. The resulting message can also be retrieved using PTT. 
   Any message, or text portion of a message, sent via standard SMS mechanisms can, as part of the invention described herein, be intercepted and converted, using the TTS component  210  of the Speech Server, to a MultimodalSMS for forwarding to the recipient. 
   If one of the users (e.g., the sender of the message) has access to a device that supports MMS or EMS capability the invention allows the speech component of an enhanced message to be removed from the message, stored in the Speech Server (or media server or database) and delivered as a MultimodalSMS message to a recipient even if the recipient has a device only supporting SMS text capability. 
   The Multimodal Platform  134  component, controlled by the MultimodalSMS application  108 , also allows MultimodalSMS message creation and retrieval by other means and with other than standard wireless telephones. Any device that supports either Simultaneous or Sequential Multimodal applications, or Web applications, can be used. These include Personal Digital Assistants (PDA), Pocket PCs, laptop and desktop PCs as well as any wireless or wireline telephones supporting such applications. As an illustrative example, a PDA that supports simultaneous multimodal applications could be used to enter text via a keyboard while recording the voice portion of the message simultaneously. Complex control option can be displayed on the PDA screen and selected using a stylus. Having access to such devices, or to MMS or EMS devices, an additional inventive idea allows creation and display of video data, which can also be stored in the MultimodalSMS database and controlled through the MultimodalSMS application  108 . 
   If the user has a WAP capable phone, the invention can be used to provide image extensions to text SMS by storing these in the MultimodalSMS database and providing them, through the MultimodalSMS application and the Multimodal Platform for display on the WAP browser in the phone. 
   In general, since the data, voice or image, associated with the MultimodalSMS message is stored in the MultimodalSMS database it can be directed to other media. Such media illustratively includes print media. The MultimodalSMS can be printed on a Kiosk or home computer printer. The voice portion of a MultimodalSMS can be directed for retrieval to any standard Voicemail system, such as those provided for network storage of voice messages, or directed to any telephone for listening or possible storage on local Voicemail. In further illustration, in addition to direct printing of image data portion, the voice portion can be converted to text using the ASR (“Automatic Speech Recognition”) element  208  of the Speech Server and similarly directed to a standard printer. 
   It is noted that the foregoing examples have been provided merely for the purpose of explanation and are in no way to be construed as limiting of the present invention. While the invention has been described with reference to various embodiments, it is understood that the words which have been used herein are words of description and illustration, rather than words of limitations. Further, although the invention has been described herein with reference to particular means, materials and embodiments, the invention is not intended to be limited to the particulars disclosed herein; rather, the invention extends to all functionally equivalent structures, methods and uses, such as are within the scope of the appended claims. Those skilled in the art, having the benefit of the teachings of this specification, may effect numerous modifications thereto and changes may be made without departing from the scope and spirit of the invention in its aspects.