Abstract: A method and apparatus control the use of transmission bandwidth by detecting a change in presentation of a video picture on a receiving telecommunication terminal; transmitting the detected change to a transmitting telecommunication terminal; and adjusting the transmission rate of the video picture in response to the detected change by the transmitting telecommunication terminal.

Abstract: A method and apparatus for testing network performance are provided. In data provided by an application on a first host for transport or communication to an application associated with a second host according to a first data transport protocol is intercepted at the first host and wrapped or encapsulated in a test data packet formatted according to a second data transport protocol. The test data packet formatted according to the second data transport protocol includes, in addition to data comprising all or a portion of the original data packet, instrumentation information. The test data packet is then delivered to the second host, which unpacks the original data packet and the instrumentation information. A response packet containing instrumentation information may be sent from the second host to the first host to provide roundtrip performance metrics.

Abstract: A method and apparatus protect data stored in a device by storing data from the device on a backup system upon the device being connected to the backup system; detecting that the device has been lost or stolen; encrypting a set of data stored on the device that has not been stored on the backup system using an encryption key based on another set of data stored on the device and also stored on the backup system; and deleting the other set of data and encryption key from the device.

Abstract: A video telecommunications system 100 for effecting a communication between at least first and second participants including an image alteration agent 358 that (i) removes desired and/or undesired image information 370 and 374 from the acquired image information 362 to form filtered image information 378 and the removed information and (ii) combines the filtered image information 378 and/or the image information 370 and 374 with substitute image information 382 to form composite image information 366; and a video communication infrastructure 304 that transmits the composite image information 366 to a communication device associated with the second participant 120. The composite image information 366 excludes undesired image information 374.

Abstract: The present invention is directed to a video telephony system, comprising: (a) an imaging device 116 to receive an image of a first participant 104 in a communication interaction with a second participant 120 remote from the first participant; (b) an audio input device 108 to receive the first participant's voice communication with the second participant; and (c) a processor 136 operable to forward the received image and voice communication, respectively, to a display and audio output device associated with the second participant. The imaging device 116 comprises at least one boundary marking device to project, during the communication session, at least one boundary marker 154 visible to the first participant 104. The boundary marker 154 indicates a spatial extent of at least one of the received image and an image circle of the imaging device.