Abstract: A data communication system capable of forwarding IP-addressed data to devices as such devices move among networks having different IP addresses is dislcosed herein. The system includes first and second networks containing first and second pluralities of nodes. At least one of the first plurality of nodes is adapted to receive data transmissions from an external IP-based network. Upon joining the first network, this device is assigned an IP address which remains with it irrespective of whether it moves beyond the range of the first network. When this device roams into the vicinity of the second network, data addressed to the device which is received at the first network is forwarded via at least one node of the second network to the roaming device.

Abstract: A data communication system capable of forwarding IP-addressed data to devices as such devices move among networks having different IP addresses is disclosed herein. The system includes first and second networks containing first and second pluralities of nodes. At least one of the first plurality of nodes is adapted to receive data transmissions from an external IP-based network. Upon joining the first network, this device is assigned an IP address which remains with it irrespective of whether it moves beyond the range of the first network. When this device roams into the vicinity of the second network, data addressed to the device which is received at the first network is forwarded via at least one node of the second network to the roaming device.

Abstract: A data communication system capable of forwarding IP-addressed data to devices as such devices move among networks having different IP addresses is disclosed herein. The system includes first and second networks containing first and second pluralities of nodes. At least one of the first plurality of nodes is adapted to receive data transmissions from an external IP-based network. Upon joining the first network, this device is assigned an IP address which remains with it irrespective of whether it moves beyond the range of the first network. When this device roams into the vicinity of the second network, data addressed to the device which is received at the first network is forwarded via at least one node of the second network to the roaming device.

Abstract: A data communication system capable of forwarding IP-addressed data to devices as such devices move among networks having different IP addresses is disclosed herein. The system includes first and second networks containing first and second pluralities of nodes. At least one of the first plurality of nodes is adapted to receive data transmissions from an external IP-based network. Upon joining the first network, this device is assigned an IP address which remains with it irrespective of whether it moves beyond the range of the first network. When this device roams into the vicinity of the second network, data addressed to the device which is received at the first network is forwarded via at least one node of the second network to the device.

Abstract: A method and apparatus for internetworked communication between first and second wireless networks containing first and second pluralities of wireless nodes, respectively, is disclosed herein. In a preferred implementation an internetworking node participates in both the first and second wireless networks, and receives a first set of network information identifying each of the first plurality of wireless nodes and the services offered thereby. The internetworking node is configured to transmit the first set of network information to a master node of the second wireless network. The internetworking node also receives, from the second wireless network, a second set of network information identifying each of the second plurality of wireless nodes and the services offered thereby. In addition, the internetworking node may also transmit the second set of network information to a master node of the first wireless network.

Abstract: A method and apparatus for internetworked communication between first and second wireless networks containing first and second pluralities of wireless nodes, respectively, is disclosed herein. In a preferred implementation a first dual-power node participates in both a first wireless network and an overlay network. The dual-power node is configured to transmit and receive in both a high-power mode and a low-power mode. The dual-power node operates in an overlay network and facilitates data transmission between low-power nodes and high-power nodes by toggling between these two power modes. In a preferred implementation, a third wireless network containing a third plurality of wireless nodes is utilized. The overlay network can accommodate a plurality of high-power or dual-power nodes.

Abstract: A method and apparatus for internetworked communication between first and second wireless networks containing first and second pluralities of wireless nodes, respectively, is disclosed herein. In a preferred implementation an internetworking node participates in both the first and second wireless networks, and receives a first set of network information identifying each of the first plurality of wireless nodes and the services offered thereby. The internetworking node is configured to transmit the first set of network information to a master node of the second wireless network. The internetworking node also receives, from the second wireless network, a second set of network information identifying each of the second plurality of wireless nodes and the services offered thereby. In addition, the internetworking node may also transmit the second set of network information to a master node of the first wireless network.

Abstract: A method and apparatus for internetworked communication between first and second wireless networks containing first and second pluralities of wireless nodes, respectively, is disclosed herein. In a preferred implementation a first dual-power node participates in both a first wireless network and an overlay network. The dual-power node is configured to transmit and receive in both a high-power mode and a low-power mode. The dual-power node operates in an overlay network and facilitates data transmission between low-power nodes and high-power nodes by toggling between these two power modes. In a preferred implementation, a third wireless network containing a third plurality of wireless nodes is utilized. The overlay network can accommodate a plurality of high-power or dual-power nodes.

Abstract: A flexible video information analysis apparatus stores a video information data base and a plurality of moving image content analysis algorithms for analyzing the video information in the data base. A user can manipulate a mouse to select one of the analysis algorithms. The selected algorithm is used to analyze video information in the data base.

Abstract: A data storage device located at a first location stores data representing plural images of a dynamic video image stream. A host processor located at a second location stores a program file representing a search algorithm for searching for a desired image among the images represented by the data stored at the first location. The program file representing the search algorithm is downloaded from the host processor to the data storage device. The downloaded program file is used to search for the desired image in the video data stored in the data storage device at the first location.

Abstract: A video data storage apparatus simultaneously records a plurality of streams of video images each generated by a respective video camera. The apparatus includes a housing having a front panel, a storage device inside the housing for storing a video information, a display screen for displaying video information and a control circuit inside the housing. A plurality of manually-operable switches is mounted in a layout pattern on the front panel. A mouse controls positioning of a cursor on the display screen. The display screen displays switch areas in accordance with the switch layout pattern of the front panel. The switch areas on the display screen are actuatable by the mouse.

Abstract: Video data storage apparatus stores on a hard disk plural fields of video data and header data associated with each field of video data. The video data is reproduced from the hard disk and the reproduced video data is processed by an image analysis algorithm. Data indicative of the outcome of the image analysis is then recorded on the hard disk as part of the header data.

Abstract: A digital recording device records and displays plural streams of video information. Portions of an image plane are assigned among image streams each generated by a respective video camera. A mouse is used to drag a camera icon into a region corresponding to a portion of the image plane to indicate assignment of the portion of the image plane to the stream of images generated by a corresponding camera. Other operating modes of the recording device are selectable by the user.

Abstract: Apparatus for analyzing and storing video data includes a video camera for generating video data and analysis circuitry for analyzing the video data generated by the video camera to detect a predetermined characteristic of the video data. The apparatus also includes first and second storage devices, and routes the analyzed video data to a selected one of the first and second storage devices in response to detection of the predetermined characteristic of the video data.

Abstract: A video data storage apparatus includes a source of video data including a number of video cameras and digitizing circuitry. Two hard disk drives are provided in the apparatus for storing the video data. Also provided in the apparatus is an archive device such as a back-up tape unit. Video data is stored on one of the hard disks, while concurrently video data is copied from the other hard disk onto the tape backup.

Abstract: A video image data field to be compression-encoded is divided into rectangular blocks. Each of the rectangular blocks is compared with a corresponding block of a reference image to generate comparison data. The block of the image to be encoded is selected for representation if the comparison data for the block meets a selection criterion. Mapping data is generated which is indicative of locations in the image plane corresponding to the selected blocks. The image to be encoded is represented in compressed form by header data, the mapping data and image data representative of the selected blocks.