Abstract: A self-contained wireless camera (10) and a wireless camera system (25) having such a device and a base station (20). Video processing (e.g. video compression) circuitry (200, 210) of the camera device receives video signals from a camera (130) and provides processed video signals. These are transmitted over a shared radio channel. A radio receiver (101) receives processed (e.g. compressed) video signals from the base station or another camera device. Images from the camera or the base station are displayed in a selected manner on a display or monitor (140). The base station device (20) receives processed (e.g. compressed) video signals, stores them and retransmits them. A command signal is received by the radio receiver to modify operation in such a manner as to control bandwidth usage. Wireless camera devices can adjust their operation to accommodate other wireless camera devices.

Abstract: A self-contained wireless camera (10) and a wireless camera system (25) having such a device and a base station (20). Video processing circuitry (200, 210) of the camera device receives video signals from a camera (130) and provides processed video signals. A radio receiver (101) receives processed video signals from the base station or another camera device. Images from the camera or the base station are displayed in a selected manner on a display or monitor (140). The base station device (20) receives processed video signals, stores them and retransmits them. A command signal is received by the radio receiver to modify operation in such a manner as to control bandwidth usage. Wireless camera devices can adjust their operation to accommodate other wireless camera devices. Different transport protocol modules 230 and 240 can be selected according to the application that the user selects for operation.

Abstract: A self-contained wireless camera (10) and a wireless camera system (25) having such a device and a base station (20). Video processing circuitry (200, 210) of the camera device receives video signals from a camera (130) and provides processed video signals. A radio receiver (101) receives processed video signals from the base station or another camera device. Images from the camera or the base station are displayed in a selected manner on a display or monitor (140). The base station device (20) receives processed video signals, stores them and retransmits them. A command signal is received by the radio receiver to modify operation in such a manner as to control bandwidth usage. Wireless camera devices can adjust their operation to accommodate other wireless camera devices. Different transport protocol modules 230 and 240 can be selected according to the application that the user selects for operation.

Abstract: A self-contained wireless camera (10) and a wireless camera system (25) having such a device and a base station (20). Video processing circuitry (200, 210) of the camera device receives video signals from a camera (130) and provides processed video signals. A radio receiver (101) receives processed video signals from the base station or another camera device. Images from the camera or the base station are displayed in a selected manner on a display or monitor (140). The base station device (20) receives processed video signals, stores them and retransmits them. A command signal is received by the radio receiver to modify operation in such a manner as to control bandwidth usage. Wireless camera devices can adjust their operation to accommodate other wireless camera devices. Different transport protocol modules 230 and 240 can be selected according to the application that the user selects for operation.

Abstract: A method and apparatus for multiplexing a plurality of communication signals where the communication signals may operate using different protocols is provided. A communication node (102) that is a part of a communications system or network (100) is provided. The access point includes a transceiver (202, 204) for transmitting and receiving a first signal and a second signal wherein the first signal (410) is using a first protocol and the second signal (412) using a second protocol. The access point also includes a scheduler (208) for scheduling a transmit time for the first signal and for the second signal within a first frame (402, 404) and a receiving time for the first signal and for the second signal within a second frame (406, 408). A multiplexer (210) is also provided where the multiplexer combines the first signal and second signal in the first and second frames according to the scheduled transmit time and receive time.

Abstract: A power line communications (PLC) system and method for providing broadband communications over a low voltage power line are disclosed. The system and method comprise a manager that controls access to a bridge for a client where the bridge communicates with the manager to provide the client Internet access. The bridge modulates Ethernet communications from the Internet access to the low voltage power line to provide the modulated Ethernet communications to the client and the client demodulates modulated Ethernet communications from the low voltage power line to yield Ethernet communications.

Abstract: A self-contained wireless camera (10) and a wireless camera system (25) having such a device and a base station (20). Video processing (e.g. video compression) circuitry (200, 210) of the camera device receives video signals from a camera (130) and provides processed video signals. These are transmitted over a shared radio channel. A radio receiver (101) receives processed (e.g. compressed) video signals from the base station or another camera device. Images from the camera or the base station are displayed in a selected manner on a display or monitor (140). The base station device (20) receives processed (e.g. compressed) video signals, stores them and retransmits them. A command signal is received by the radio receiver to modify operation in such a manner as to control bandwidth usage. Wireless camera devices can adjust their operation to accommodate other wireless camera devices.

Abstract: A self-contained wireless camera (10) and a wireless camera system (25) having such a device and a base station (20). Video processing (e.g. video compression) circuitry (200, 210) of the camera device receives video signals from a camera (130) and provides processed video signals. These are transmitted over a shared radio channel. A radio receiver (101) receives processed (e.g. compressed) video signals from the base station or another camera device. Images from the camera or the base station are displayed in a selected manner on a display or monitor (140). The base station device (20) receives processed (e.g. compressed) video signals, stores them and retransmits them. A command signal is received by the radio receiver to modify operation in such a manner as to control bandwidth usage. Wireless camera devices can adjust their operation to accommodate other wireless camera devices.

Abstract: A multi-level demodulator has a VCO (32) and two reference frequency sources (50, 41). A relatively long time-constant loop (45, 47) has an input coupled to the VCO, an input coupled to one of the reference frequency sources (41) and an output coupled to the VCO. A relatively short time-constant loop (51, 30) has an input coupled to the VCO, an input coupled to the other reference frequency source (50) and an output coupled to the VCO.

Abstract: An RF shield for use on tightly packed printed circuit boards has a normally-closed lid that can be opened to provide repair access to shielded components and then reclosed. The shield is a five-sided metal can having a top surface (12) with a lid defined on one edge by a fold line (20) and on the other three edges by partial shear lines (22, 24, 26) through the thickness of the metal top surface. The shear lines define frangible connections between the lid and top surface (18) that can be severed to allow the lid to open. The fold line serves as a hinge about which the lid can pivot for opening. Upon closing the lid can be spot-soldered to hold it shut.

Abstract: An apparatus automatically corrects for DC offset in a multi-level packet-switched receiver. A reference carrier frequency is used during the receiver's idle mode to establish a DC offset exiting a discriminator (302). The DC offset is amplified by a video amplifier (315) and fed into an error amplifier (320) which generates the negative of the DC offset. The DC offset and the negative of the DC offset are input into a summing network (330) resulting in a zero DC offset exiting the video amplifier (315).

Abstract: An improved multilevel FSK demodulator, according to the invention, is provided that down-converts the IF frequency back to baseband quadrature via dual mixers. The improved multilevel FSK demodulator uses controllable time-delay in the demodulation process. This method requires a 90.degree. phase difference between 2 modulated signals to produce a maximum demodulated output amplitude at the maximum frequency deviation. Since the IF frequencies have been down-converted back to baseband quadrature, these 2 signals are only "out of phase" by an amount .DELTA.t that is equal to 90.degree./d.omega.. A further aspect of this invention addresses minimizing the DC offset from the demodulator by providing a feedback signal which controls the amount of delay provided to one of the quadrature signals.