308 results about "Dual-tone multi-frequency signaling" patented technology

A system and method include implementing and accessing a subscriber's telecommunications services, using a graphical user interface (GUI) via the Internet, and an interactive voice response (IVR) system via the public switched telecommunications network (PSTN). The system and method enable a subscriber to review, schedule and modify call forwarding information stored and implemented by a service control-point (SCP) through a common server from any dual tone multi-frequency (DTMF) telephone and IVR system via the PSTN or any GUI and Web client via the Internet. The subscriber is able to build and edit call forwarding data, such as a scheduler and priority and rejection screening lists, by the GUI via the Internet for subsequent implementation.

A system and method for speech-responsive voice messaging, in which a Speech-Responsive Voice Messaging System (SRVMS) preferably provides a hierarchically-simple speech user interface (UI) that enables subscribers to use speech to specify commands such as mailboxes, passwords, and digits. The SRVMS generates and evaluates candidate results. The SRVMS invokes a speech UI navigation operation or a voice messaging operation according to the outcome of the evaluation of the candidate results. In the preferred embodiment, the SRVMS determines whether the candidate results are good, questionable, or bad; and whether two or more candidate results are ambiguous due to a likelihood that each such result could be a valid command. If the candidate results are questionable or ambiguous, an ambiguity resolution UI prompts the subscriber to confirm whether the best candidate result is what the subscriber intended. In response to repeated speech recognition failures, the SRVMS transfers the subscriber to a Dual Tone Multi Frequency (DTMF) UI. Transfer to the DTMF UI is also performed in response to detection of predetermined DTMF signals issued by the subscriber while the speech UI is in context. The SRVMS provides a logging unit and a reporting unit which operate in parallel with the speech UI, in a manner that is transparent to subscribers. The logging unit directs the selective logging of subscriber utterances, and the reporting unit selectively generates and maintains system performance statistics on multiple detail levels.

A mediation device located in the user's home receives dual-tone multi-frequency (DTMF) signals via a Plane Old Telephone Service (POTS) connection and decodes the signals into signals that are used to control one or more cameras of the user's home security system. The mediation device may be a device that serves only this purpose, or it may be part of another device, such as, for example, an answering machine, a fax machine, or a cordless telephone.

Uplink and downlink telemetry between an implantable medical device (IMD) telemetry transceiver and an external medical device (EMD) telemetry transceiver used by a patient or health care provider is facilitated by the communications system of the present invention. The IMD provides a therapy and / or measures physiologic conditions of the patient for use in formulating a therapy and / or for storage in IMD memory for later uplink telemetry transmission. The patient causes the EMD to emit encoded dual tone multiple frequency (DTMF) tones that are detected by an audio receiver of the IMD to enable uplink and downlink telemetry transmissions in a telemetry or communication session. Then, the patient formulates a message via a message entry mechanism of the EMD that communicates an instruction or query to the IMD. The downlink message is optionally displayed by an EMD display as it is composed by the user and is then downlink telemetered to the IMD. A responsive uplink message from the IMD is uplink telemetered, received by the EMD telemetry transceiver, stored in EMD memory and displayed by EMD display. The EMD optionally includes a DSVD / modem module for either connection to a telephone line or a cellular telephone receiver in a variety of ways that can provide two-way voice communication between the patient and a remote care provider as well as transmission of uplink telemetered IMD and patient data to a remote EMD. The IMD may further include an audio tone generator for generating a tone or series of tones indicative of operation or status of the IMD that can be heard by the patient or received and displayed by the IMD. The DTMF tones can also be employed to alter an IMD operation.

A system and method for speech-responsive voice messaging, in which a Speech-Responsive Voice Messaging System (SRVMS) preferably provides a hierarchically-simple speech user interface (UI) that enables subscribers to use speech to specify commands such as mailboxes, passwords, and digits. The SRVMS generates and evaluates candidate results. The SRVMS invokes a speech UI navigation operation or a voice messaging operation according to the outcome of the evaluation of the candidate results. In the preferred embodiment, the SRVMS determines whether the candidate results are good, questionable, or bad; and whether two or more candidate results are ambiguous due to a likelihood that each such result could be a valid command. If the candidate results are questionable or ambiguous, an ambiguity resolution UI prompts the subscriber to confirm whether the best candidate result is what the subscriber intended. In response to repeated speech recognition failures, the SRVMS transfers the subscriber to a Dual Tone Multi Frequency (DTMF) UI. Transfer to the DTMF UI is also performed in response to detection of predetermined DTMF signals issued by the subscriber while the speech UI is in context. The SRVMS provides a logging unit and a reporting unit which operate in parallel with the speech UI, in a manner that is transparent to subscribers. The logging unit directs the selective logging of subscriber utterances, and the reporting unit selectively generates and maintains system performance statistics on multiple detail levels.

Uplink and downlink telemetry between an implantable medical device (IMD) telemetry transceiver and an external medical device (EMD) telemetry transceiver used by a patient or health care provider is facilitated by the communications system of the present invention. The IMD provides a therapy and / or measures physiologic conditions of the patient for use in formulating a therapy and / or for storage in IMD memory for later uplink telemetry transmission. The patient causes the EMD to emit encoded dual tone multiple frequency (DTMF) tones that are detected by an audio receiver of the IMD to enable uplink and downlink telemetry transmissions in a telemetry or communication session. Then, the patient formulates a message via a message entry mechanism of the EMD that communicates an instruction or query to the IMD. The downlink message is optionally displayed by an EMD display as it is composed by the user and is then downlink telemetered to the IMD. A responsive uplink message from the IMD is uplink telemetered, received by the EMD telemetry transceiver, stored in EMD memory and displayed by EMD display. The EMD optionally includes a DSVD / modem module for either connection to a telephone line or a cellular telephone receiver in a variety of ways that can provide two-way voice communication between the patient and a remote care provider as well as transmission of uplink telemetered IMD and patient data to a remote EMD. The IMD may further include an audio tone generator for generating a tone or series of tones indicative of operation or status of the IMD that can be heard by the patient or received and displayed by the IMD. The DTMF tones can also be employed to alter an IMD operation.

Systems and methods are disclosed for mobile payment using dual-tone multi-frequency (DTMF) signals. A mobile device equipped with at least a speaker and an input is used to connect to a server on the mobile network. Upon authentication of a user of the mobile device, the server generates the payment key, translates the key to DTMF signals, and plays the DTMF signals over the speaker of the mobile device. The user holds the mobile device speaker close to a microphone of a DTMF scanner at a POS terminal. The DTMF scanner includes logic that extracts the payment key from the DTMF signals, and the POS terminal uses the payment key to bill the user. The POS terminal transmits the bill with the payment key to the server on the network. The server ensures that the key is active, and debits an account for the user based on the amount presented in the bill. The key is de-activated after a specified time period or one use, whichever occurs first.

An data packet network telephony system provides identification information of an end user terminal making an Internet telephone call to a call center terminal and provides a call center agent with the ability to cause an end user terminal making an Internet telephone call to display selected web pages and or to synchronize displays between the agent and end user terminals. In one embodiment, customer identification information is provided in-band. In another embodiment, customer identification information is accomplished out of band, in some cases using an identifier of the PSTN gateway as an index into a table to identify an end user terminal. In another embodiment, an agent may enter DTMF (dual tone multi-frequency tones) to push web pages to an end user terminal. In still other embodiments, a second communications link between the end user terminal and the agent's terminal is established, allowing for data sharing / synchronization.

A method for telephone communications includes providing a protocol that defines a relation between predetermined graphic elements and respective sequences of dual-tone multi-frequency (DTMF) signals. A screen to be displayed is designed, including one or more of the graphic elements. An encoded representation of the screen is then generated using DTMF signals in accordance with the protocol. The encoded representation is transmitted over a telephone line to a telephone subscriber unit, whereby the one or more graphic elements are displayed by the subscriber unit responsive to the encoded representation of the screen.

The invention relates to a method for constructing a full-coverage all-direction resource sharing family endowment service system, belonging to the field of the information processing and transmission technology. The invention is technically characterized by mainly comprising a system platform, an Internet website subsystem, a call platform subsystem, an Internet aged-people interaction subsystem, a 120 first-aid supplementary information service subsystem, a home delivery logistics subsystem, home service scheduling subsystem and a call termination subsystem, wherein the call termination subsystem mainly comprises a computer, dual tone multi-frequency signal receiving and transmitting equipment, a telephone terminal and computer software. The family endowment service system constructed with the method can be used as an integrated network service system in the community and further as a digital information platform. The method of the invention is not only a special method applied to a special object but also a general method for constructing an information processing and transmission system serving the public. For example, the method of the invention can be used for constructing the full-coverage all-direction resource sharing life insurance service system.

A secure three-way bridge in a SIP-based processing switch protects sensitive information provided by a party during a call with an agent in a contact center. During the call, the agent may bridge an interactive voice response system (“IVR”) onto the call using the secure three-way bridge so that the party can enter sensitive information, such as a credit card account, to the IVR. The information is provided by the party using dual-tone multiple frequency (“DTMF”) tones that are presented in an unmodified form to the IVR, but modified and then presented to the agent, so that the agent is unable to discern the sensitive information provided by the party. Other embodiments may accomplish similar capabilities by application of components outside of the bridging structure. Further, recording systems may record the call comprising the modified audio, thus protecting the sensitive information from subsequent detection upon review of the recording.

A communication device, such as a Voice over Internet Protocol (VoIP) gateway, determines a duration for Dual Tone Multi-Frequency (DTMF) tone portions of telephony signal. If the duration is less than a pre-determined amount, a minimum duration is enforced during DTMF playback at a remote end of a network connection connected to a destination gateway. Minimum playback duration can be enforced at the terminating gateway—however, the originatinggateway can also encode a DTMF packet with a minimum duration value. At the terminating receiver it is not always possible to playback exactly what happened at the originating point in the same time frame. One solution to is to, at the terminating gateway, drop the first portion of voice packets that overlap with the end portion of played back DTMF tones.

The present invention is directed to a method and system for detecting a wireless telephone communication in a vehicle, and once detected, when the vehicle exceeds a predefined speed limit, for generating and sending Dual-Tone Multi Frequency (DTMF) encoded information over the voice channel. The encoded information comprises the values of various physical parameters related to the moving vehicle. For instance, these parameters can include the current time at which the telephone communication started, and optionally, the position of the vehicle. In a particular embodiment, the values of the various parameters are sent at regular time intervals until the communication terminates.

An data packet network telephony system provides identification information of an end user terminal making an Internet telephone call to a call center terminal and provides a call center agent with the ability to cause an end user terminal making an Internet telephone call to display selected web pages and or to synchronize displays between the agent and end user terminals. In one embodiment, customer identification information is provided in-band. In another embodiment, customer identification information is accomplished out of band, in some cases using an identifier of the PSTN gateway as an index into a table to identify an end user terminal. In another embodiment, an agent may enter DTMF (dual tone multi-frequency tones) to push web pages to an end user terminal. In still other embodiments, a second communications link between the end user terminal and the agent's terminal is established, allowing for data sharing / synchronization.

A person receiving a Voice over IP call, such as a call center agent, remotely controls media settings on a caller's multimedia terminal device functioning as a telephone terminal device. In some embodiments, the call center agent may remotely control media settings by entering a DTMF (dual tone multi-frequency) sequence from the telephone keypad. The DTMF sequence may be recognized by a gateway through which an Internet-to-PSTN call is made, stripped out of the audio stream and sent to the caller's multimedia terminal device in a separate command message through the Internet, or the DTMF sequence may be encoded into packets along with the voice information for detection and translation into a command message by software at the caller's terminal device. In pure VoIP applications, command packets may be sent directly. When a command message is received at the caller's terminal device, software on the end user computer makes the corresponding media setting changes without requiring any intervention on the part of the caller.

The present invention relates to a communication method integrating network and extension forwarding to automatically broadcast caller messages to specific computer IP addresses, which will transmit in real-time the caller messages to a computer specified by each extension user, and display all kinds of information in a multimedia form, via network. The present invention comprises a main server, a caller ID module, a DTMF (Dual Tone Multi-Frequency) module, a telephone extension data base, a caller information database, a network communication interface, and a client-side program. When a user dials into an enterprise switch, the extension number that the caller intends to forward, and the caller's phone number will be retrieved, and be automatically transmitted to a computer specified by the extension user, thereby facilitating the retrieval of caller information for the extension user.

The invention discloses highly-reliable data transmission method and device based on dual tone multiple frequency sound waves, wherein the device comprises a sending end which is connected with a sound making device so as to be used for sending sound wave signals, and a receiving end which is connected with a listening device so as to be used for receiving the sound wave signals, the sending end comprises a data generating unit, a dual tone multiple frequency information coding unit and a dual tone multiple frequency sound wave sending unit, and the receiving end comprises a dual tone multiple frequency sound wave receiving unit, a dual tone multiple frequency information decoding unit and a data verifying unit. The method and device provided by the invention has lower requirements on hardware, can carry out data transmission only by arranging a horn and a microphone, can be used on a mobile phone and a computer, and facilitates the realization of application and service fast and with lower cost; when the dual tone multiple frequency information is encoded, the difficult problem that the starting positions of the signals are not easy to look up by adopting a method of comparing and collecting total values after multi-step excursion; and during date generation and data verification, the data consistency can be ensured by adopting verification and an algorithm.

An integrated telephone user interface (TUI) system permitting switching between Dual Tone Multi-Frequency and voice operating command modes. This system provides the user with access to either command mode and allows the user to toggle among the two command modes while each command mode remains functionally distinct from the other. For example, when receiving a call, the TUI prompts the user to select either the voice-based or the tone-based command mode. After receiving an input from the user that activates one of the command modes, the user may initiate a desired TUI operation while in the active command mode. However, the user can also interrupt the active command mode and switch to another operationally distinct command mode. In response to the interruption, the system translates command modes to allow the user to resume TUI operation in the other command mode.

A Plain Old Telephone System (POTS) connection is established between a Broadband modem and a remote server. A configuration request is then transmitted from the Broadband modem to the remote server using DTMF tones. Subsequently a domain name associated with a Broadband Service Node (BSN) and a user identifier, such as a telephone number, is received from the remote server via the POTS connection using Dual-Tone Multi-Frequency (DTMF) tones. A PPPoE session is then established using the domain name, by firstly authenticating the Broadband modem for the PPPoE session and then configuring the DSL modem. This configuration is accomplished by transmitting a request for configuration details from the Broadband modem to the BSN having the domain name and then receiving configuration details from the configuration server. The Broadband modem then automatically configures itself using the configuration details.

A general purpose network tone detection method and apparatus that allows the precise and accurate recognition of North American tones (MF, DTMF (Dual-Tone Multifrequency), and CPT (Call Progress Tones)) and international MF-R2 tones as well as taking into consideration other common tones such as Calling Card Service Prompt and Recall Dial. Through the use of the Discrete Fourier Transform (DFT) on small time windows and by providing phase continuity between these windows, the results of the successive DFTs may be combined and processed by a second DFT computation. This second DFT allows higher frequency resolution without requiring the re-computation of the DFT from the time samples. The resulting effect is a tone receiver with both high time and frequency resolution which consequently leads to robust and accurate tone recognition systems conforming even to the most stringent specification while maintaining low computational requirements.

In one embodiment, a secure mechanism operates in conjunction with a three-way bridge in a contact center to protect against inadvertent exposure of sensitive information provided during a call. During the call, an agent may bridge on an interactive voice response system (“IVR”) onto the call prompting the party to enter sensitive information, such as a credit card account number, to effect a payment. The information may be provided by the party using dual-tone multiple frequency (“DTMF”) tones or speech. The IVR may provide a confirmatory announcement indicating the sensitive information received. A switch may be controlled by the IVR so that any sensitive information expected from the party or provided by the IVR in a confirmatory announcement is not presented to the agent or to a recording system. In this manner, the IVR suppresses the exposure of sensitive information to the agent and / or a recording system.

A system that concurrently provides multiple user interface (UI) mechanisms that facilitate control of an application state machine (e.g., unified message system). More particularly, the invention can create two relatively distinct user experiences, one via dual tone multi-frequency (DTMF) navigation and another through speech recognition navigation of a unified message system. In accordance therewith, one single underlying state machine can be used. Navigation and flow control (e.g., state transitions) in the state machine can be leveraged by multiple UI mechanisms that actively co-exist. The invention introduces speech recognition features together with other input mechanisms to drive the UI of an application state machine (e.g., unified messaging system). The speech recognition UI can be designed to provide a natural navigation through the application independent of a DTMF UI.

The invention discloses a multi-terminal multimedia conference control system and an implementation method. The conference control system comprises a conference capability component subsystem and a conference flow control subsystem, wherein the conference flow control subsystem comprises a dual tone multiple frequency (DTMF) normality monitoring module, a request message routing module, a conference speech policy control module, a terminal speech making module, a speech stopping module and a terminal switching module. The multimedia conference control system realizes the functions of applied message acquiring of mobile phones, phones and web client ends, message routing, terminal switching, conference speech policy controlling, terminal speech making and speech stopping through all the functional modules of the conference flow control subsystem so as to achieve the purposes of controlling a multimedia conference and carrying out conference switching between participated communication terminals. By adopting the multimedia conference control system, the cost for using the conference control system of publics can be reduced so as to be helpful to popularize the multimedia conference service.

Data may be encoded into dual tone multiple frequency (DTMF) digits within a set top box (STB). The STB may be a satellite STB. The STB may establish connection to a networked entity such as a billing center or satellite headend via voice call over cellular network and communicate data encoded by DTMF digits. A wireless transceiver integrated within the STB and / or an external wireless transceiver such as cellular phone may be utilized to establish a call and transmit the DTMF digits. The external wireless transceiver may be coupled to the STB via a wired connection or a wireless connection such as WiFi or Bluetooth. The data communicated via DTMF digits may comprise billing data. The STB may receive an acknowledgement for receipt of the transmitted data.

The invention relates to the technical field of speech technology, and discloses a method and a system for processing users' speech signals. The method includes the steps of, by a server, receiving users' speech signals which are mixture of external speech received by a speech terminal through a microphone and double-tone multi-frequency key tone of the speech terminal; subjecting the received users' speech signals to spectral analysis by the server; judging whether the preset key is pushed or not during talking according to double-tone multi-frequency target frequency component corresponding to the preset key in the frequency spectrum; if the key is pushed, then determining that current user speech input is over. By the method and the system for processing users' speech signals, whether speech is over or not can be determined accurately effectively.

A method for sending a dual-tone multi-frequency (DTMF) signal using a voice over Internet protocol (VoIP). A user datagram protocol (UDP) port is set up for transfer of DTMF data between a VoIP gateway and a VoIP client. If a caller inputs a numeral key in a VoIP-based call connection state, the VoIP client requests the VoIP gateway to send information regarding a digital signaling processor (DSP) channel currently established therein. The VoIP gateway retrieves the currently established DSP channel information on the basis of an IP address of the VoIP client and sends the retrieved DSP channel information to the VoIP client. The VoIP client sends DTMF data corresponding to the inputted numeral key to the VoIP gateway through the set-up UDP port. The VoIP gateway receives the DTMF data from the VoIP client through the UDP port, generates a DTMF signal corresponding to the received DTMF data and sends the generated DTMF signal to the VoIP client's counterpart. Therefore, the DTMF signal can be accurately sent to the counterpart, and routing information for transfer of the DTMF data is provided by sending DSP channel information of a current VoIP call to the VoIP client and a Web call server.

The invention relates to an end-to-end voice encryption method. The method comprises the following steps: a first mobile terminal in a connected status sends a dual tone multi-frequency signal input by a key to a second mobile terminal at the other end of communication, obtains corresponding key index information according to key interruption input by the key, and then extracts the corresponding key from a key storage area of the first mobile terminal; after a secret communication channel is established, the first mobile terminal performed encrypted communication with the second mobile terminal according to the key. The invention also relates to an end-to-end voice encryption device. The corresponding key can be extracted so as to provide the voice encryption service in the mobile network through the key index method of DTMF transmission and based on the specific mobile terminal. Therefore, the security of the voice communication can be provided for users.

A method and system of updating location information of a portable computing device is disclosed. Location data is received from a positioning device. A voice link is utilized for communication between the portable computing device and a call center. A dual-tone multi-frequency signal is mapped to a pre-determined range of movement. The dual-tone multi-frequency signal is transmitted to the call center when a longitude measurement in the location data indicates a change in longitude that is within the pre-determined rage of movement. The dual-tone multi-frequency signal is transmitted as an indicator of longitude change of location of the portable computing device. In addition, the dual-tone multi-frequency signal is transmitted to the call center when a latitude measurement in the location data indicates a change in latitude that is within the pre-determined rage of movement. The dual-tone multi-frequency signal is transmitted as an indicator of latitude change of location of the portable computing device.