Abstract: A method of initiating a call between users with reduced call set-up times using one or more telecommunication networks. The method is provided between at least a pair of H.324-like terminals coupled to the one or more telecommunication networks. The method includes providing one or more preferences for a call associated with a first terminal and a second terminal. The one or more preferences are associated with an initial mode of operation for the call between the first terminal and the second terminal. The method also includes processing the one or more preferences as a Custom Message, embedding the Custom Message in a predetermined field of a call initiation message, and transferring the Custom Message from the first terminal to the second terminal through a telecommunication network using call signaling.

Abstract: A method and apparatus for frame classification and rate determination in voice transcoders. The apparatus includes a classifier input parameter preparation module that unpacks the bitstream from the source codec and selects the codec parameters to be used for classification, parameter buffers that store previous input and output parameters of previous frames, and a frame classification and rate decision module that uses the source codec parameters from the current frame and zero or more frames to determine the frame class, rate, and classification feature parameters for the destination codec. The classifier input parameter preparation module separates the bitstream code and unquantizes the sub-codes into the codec parameters. The frame classification and rate decision module comprises M sub-classifiers and a final decision module.

Abstract: Methods of establishing multimedia telecommunication (a multimedia “call”) between equipment (“terminals”). More particularly, the invention provides methods for reducing the time required to establish calls between terminals implementing ITU-T Recommendation H.324 and derived or related standards or recommendations such as 3G-324M. More specifically, it relates to methods and apparatuses for (i) concatenating H.245 messages to pass between the terminals at the start of the call to establish the capabilities of both terminals and agree on the type and format of media and data to be exchanged (ii) using non-standard H.245 messages or standard H.245 messages with non-standard fields to accelerate establishment and (iii) informing each terminal of the capabilities of the other and proposing the type and format of media and data to be exchanged by means of fields inserted in the call signaling protocol used for bearer establishment prior to the H.324 stage of the call.

Abstract: A variable-rate voice transcoder that transcodes a bitstream representing frames of data encoded according to a first compression standard to a bitstream representing frames of data according to a second compression standard; the second compression standard defines a variable-rate voice codec. The method includes unquantizing a bitstream into a first set of parameters compatible with the first compression standard. The first set of parameters in addition to external control commands are then used to determine a frame class and a rate for the second compression standard. Next, the first set of parameters are transformed into a second set of parameters compatible with the second compression standard according to the frame-classification and rate determination decision. Lastly, the second set of parameters is packed into a bitstream compatible with the second compression standard.

Abstract: A method of initiating a call between users with reduced call set-up times using one or more telecommunication networks. The method is provided between at least a pair of H.324-like terminals coupled to the one or more telecommunication networks. The method includes transmitting a call signaling message from a first terminal to a second terminal through a telecommunication network to initiate a call, establishing a bearer channel between the first terminal and the second terminal once the call signaling message has been received by the second terminal, and determining a common mobile level. The method also includes determining two or more H.245 messages associated with set up parameters for an initial predetermined mode of operation, concatenating the two or more H.245 messages into one SRP command frame according to a predetermined size of the SRP command frame, and transmitting the SRP command frame including the two or more H.

Abstract: A method of processing a call with reduced call set-up times using one or more telecommunication networks includes providing one or more preferences for a call associated with a first terminal and a second terminal. The one or more preferences are associated with an initial setup of one or more media channels for the call. The method also includes processing the one or more preferences as a preference message, processing the preference message by an FEA procedure to provide an FEA preference message, and transferring a first framing synchronization flag sequence, the FEA preference message, and a second framing synchronization flag sequence from the first terminal to the second terminal. The method further includes receiving one or more acknowledgement preference messages from the second terminal, completing the initial setup of the one or more media channels, and thereafter, exchanging information between the first and second terminals.

Abstract: An apparatus and method for mapping CELP parameters between a source codec and a destination codec. The apparatus includes an LSP mapping module, an adaptive codebook mapping module coupled to the LSP mapping module, and a fixed codebook mapping module coupled to the LSP mapping module and the adaptive codebook mapping module. The LSP mapping module includes an LP overflow module and an LSP parameter modification module. The adaptive codebook mapping module includes a first pitch gain codebook. The fixed codebook mapping module includes a first target processing module, a pulse search module, a fixed codebook gain estimation module, a pulse position searching module.

Abstract: A method for transcoding a CELP based compressed voice bitstream from source codec to destination codec. The method includes processing a source codec input CELP bitstream to unpack at least one or more CELP parameters from the input CELP bitstream and interpolating one or more of the plurality of unpacked CELP parameters from a source codec format to a destination codec format if a difference of one or more of a plurality of destination codec parameters including a frame size, a subframe size, and/or sampling rate of the destination codec format and one or more of a plurality of source codec parameters including a frame size, a subframe size, or sampling rate of the source codec format exist. The method includes encoding the one or more CELP parameters for the destination codec and processing a destination CELP bitstream by at least packing the one or more CELP parameters for the destination codec.

Abstract: A method of establishing a session between a first device and a second device. The session is established over a telecommunications network using an accelerated session setup technique. The method includes providing a first accelerated session setup technique and providing a second accelerated session setup technique. The method also includes establishing the session using either the first accelerated session setup technique or the second accelerated session setup technique based on a predetermined process.

Abstract: A method of establishing a reduced setup time session through a gateway includes receiving a first capability message transmitted from the first terminal to the gateway and receiving a second capability message transmitted from the second terminal to the gateway. The method also includes processing the first capability message and the second capability message to form a third capability message and a fourth capability message. The method further includes transmitting a third capability message from the gateway to the first terminal and transmitting a fourth capability message from the gateway to the second terminal. Moreover, the method includes receiving a first request message transmitted from the second terminal to the gateway and transmitting a second request message from the gateway to the first terminal. Transmitting the second request message is performed independent of receiving the first request message.

Abstract: A conferencing system is provided that utilizes both time domain signal mixing and direct signal fast transcoding. An exemplary embodiment of the present invention utilizes both time domain signal mixing and direct signal fast transcoding to process a bit-stream from a same channel during a conference.

Abstract: A method of reducing a call set-up time between a pair of H.324-like terminals coupled to one or more telecommunication networks includes providing a first capability identifier in at least one of a non-standard or generic field of a first TCS message, transmitting the first capability identifier from the first H.324-like terminal to the second H.324-like terminal, and receiving, at the first H.324-like terminal, a second capability identifier in at least one of a non-standard or generic field of a second TCS message transmitted from the second H.324-like terminal. The method also includes determining, at the first H.324-like terminal, a mode of operation by utilizing an inference algorithm based upon at least the first capability identifier and the second capability identifier. The method further includes transmitting media from the first H.324-like terminal to the second H.324-like terminal in accordance with the determined mode of operation.

Abstract: A method of delivering a video ringback media stream to a first terminal includes transmitting a session signaling message from the first terminal to a ringback server, transmitting a session signaling response message from the ringback server to the first terminal, and establishing one or more channels between the ringback server and the first terminal. The method also includes establishing one or more media streams between a content device and the ringback server and processing the one or more media streams in the ringback server to form a video ringback media stream. The method further includes transmitting the video ringback media stream from the ringback server to the first terminal, transmitting a second session signaling message from the ringback server to a second terminal, and transmitting a second session signaling response message associated with answering a call from the second terminal to the ringback server.

Abstract: An apparatus and method for encoding and decoding a voice signal. The apparatus includes an encoder configured to generate an output bitstream signal from an input voice signal. The output bitstream signal is associated with at least a first standard of a first plurality of CELP voice compression standards. Additionally, the apparatus includes a decoder configured to generate an output voice signal from an input bitstream signal. The input bitstream signal is associated with at least a first standard of a second plurality of CELP voice compression standards. The CELP encoder includes a plurality of codec-specific encoder modules. Additionally, the CELP encoder includes a plurality of generic encoder modules. The CELP decoder includes a plurality of codec-specific decoder modules. Additionally, the CELP decoder includes a plurality of generic decoder modules.

Abstract: A multimedia exchange server adapted to communicate multimedia information includes a multimedia gateway adapted to receive a first media from a first network and transmit a second media to a second network. The multimedia exchange server also includes a processor coupled to the multimedia gateway and adapted to provide the second media. The multimedia exchange server further includes a memory coupled to the processor and adapted to store the first media. The first media is stored in the memory for a predetermined period of time, which is greater than a buffering period.

Abstract: A method of managing media on a multimedia exchange server using a multimedia terminal includes receiving, at a multimedia exchange server, a request to establish a communication link between the multimedia terminal and the multimedia exchange server and establishing the communication link between the multimedia terminal and the multimedia exchange server. The method also includes transmitting a content management menu from the multimedia exchange server to the multimedia terminal. The content management menu includes one or more options for managing content on the multimedia exchange server. Additionally, the multimedia exchange server is adapted to respond to a receipt of an input indicating a selection of the one or more options for managing content.

Abstract: A method of providing an interactive multimedia game to a multimedia terminal in a telecommunication network includes receiving, at a multimedia exchange server, a request to establish a communication link between the multimedia terminal and the multimedia exchange server and establishing the communication link between the multimedia terminal and the multimedia exchange server. The method also includes providing, at the multimedia exchange server, a first media stream to the multimedia terminal. The first media stream is associated with the interactive multimedia game. The method further includes receiving, at the multimedia exchange server, one or more user inputs from the multimedia terminal. The one or more user inputs either control the interactive multimedia game or define a participation in the interactive multimedia game.

Abstract: Methods of establishing multimedia telecommunication (a multimedia “call”) between equipment (“terminals”). More particularly, the invention provides methods for reducing the time required to establish calls between terminals that implement the ITU-T H.324 Recommendation and other Standards and Recommendations derived from or related to this such as the 3G-324M recommendation developed and adopted by the Third Generation Partnership Projects (3GPP and 3GPP2). More specifically, it relates to (i) a method and apparatus for concatenating the H.245 messages that are required to pass between the terminals at the start of the call to establish the capabilities of both terminals and agree on the type and format of media and data to be exchanged (ii) a method and apparatus for using non-standard H.245 messages or standard H.

Abstract: A method of reducing a call set-up time for a call between a pair of H.324-like terminals includes providing a first capability for the call, processing the first capability to form a first message, establishing a bearer channel, and transmitting the first message from the first terminal to the second terminal through the telecommunications network using the bearer channel. The first capability is associated with an initial mode of operation for the call. The method also includes receiving a second message transmitted from the second terminal to the first terminal. The second message includes a second capability associated with the initial mode of operation for the call. The method further includes determining that a conflict exists between the first capability and the second capability, resolving the conflict by modifying at least one of the first capability or the second capability, and transmitting information from the first terminal to the second terminal.

Abstract: A method of processing a call with reduced call set-up times using one or more telecommunication networks includes providing one or more preferences for a call associated with a first terminal and a second terminal. The one or more preferences are associated with an initial setup of one or more media channels for the call. The method also includes processing the one or more preferences as a preference message, processing the preference message by an FEA procedure to provide an FEA preference message, and transferring a first framing synchronization flag sequence, the FEA preference message, and a second framing synchronization flag sequence from the first terminal to the second terminal. The method further includes receiving one or more acknowledgement preference messages from the second terminal, completing the initial setup of the one or more media channels, and thereafter, exchanging information between the first and second terminals.