Abstract:
A satellite transponder switch (STS) maintains a table that maps set-top boxes (STBs) to carrier frequencies. The STS receives a first request from a first STB for a first transponder band and a second request from a second STB for a second transponder band. The STS accesses a first satellite feed and polarity based on the first request, and a second satellite feed and polarity based on the second request. The STS band-pass filters the first and second transponder bands from the first and second satellite feed and polarity, respectively. The STS frequency shifts the first transponder band to a first carrier frequency assigned to the first STB and the second transponder band to a second carrier frequency assigned to the second STB. The STS outputs a signal that comprises the frequency-shifted first and second transponder bands to the first STB and the second STB.
Abstract:
The present invention relates to a method and apparatus for selectively enabling and disabling transmit and receive functions of a radio (figure 1A), and more particularly to a system and method utilizing an out-of-band signal over a time division duplex channel to control transmit (11) and receive (12) functions of a radio so as to synchronize with the functions of a remote modem (figure 2, 40). The invention relates to a system and method for synchronizing the transmit and receive modes of a radio via an out of band signal. The out of band signal is preferably a control tone at a predetermined frequency and is substantially coextensive with the communication signal to be transmitted. The radio filters a multiplexed signal and detects if the control tone is present. If the control tone is not detected, the radio preferably remains in the default receive mode. If the control tone is detected, the radio operates in the transmit mode for the duration of the control signal.
Abstract:
Electronic media content (64) received from a remote server to be displayed according to a schedule (62) together with Dynamic Data (66) to be displayed according to another overlying schedule are mixed in a scheduler (74) according to logs (66) of user preferences, monitored and formatted (76) and loaded for display (72) in a composite Scene Renderer (78) and displayed to a user (8) who may, at times be disconnected from the remote server.
Abstract:
Methods and systems that support downstream media signal insertion into a digital signal without affecting digital signal quality is presented here. The methods and systems can utilize pre-defined bitrate values assigned to media signals and allocate that bitrate to a portion of a digital signal that will be replaced by the media signal. The methods are equally applicable to both open and closed-loop encoding systems.
Abstract:
The present invention relates to a method and apparatus for selectively enabling and disabling transmit and receive functions of a radio (figure 1A), and more particularly to a system and method utilizing an out-of-band signal over a time division duplex channel to control transmit (11) and receive (12) functions of a radio so as to synchronize with the functions of a remote modem (figure 2, 40). The invention relates to a system and method for synchronizing the transmit and receive modes of a radio via an out of band signal. The out of band signal is preferably a control tone at a predetermined frequency and is substantially coextensive with the communication signal to be transmitted. The radio filters a multiplexed signal and detects if the control tone is present. If the control tone is not detected, the radio preferably remains in the default receive mode. If the control tone is detected, the radio operates in the transmit mode for the duration of the control signal.
Abstract:
A broadcast network (1) is described in which to improve network efficiency and quality of service, a particular transmitter (11a) within the network (1) is selected to transmit content to a particular, preferably mobile terminal (3). The selection of the transmitter (11a) is carried out by reference to information available in a second network (27), the user of the terminal (3) having a further terminal (12) connected to the second network (27) and either integrated with or in close proximity to their mobile terminal (3).
Abstract:
A system and method of compensating for path losses for data transmissions from various remote modems (408) to a central modem (332) for use in a system that provides data communications over a passive multipoint network such as coaxial tree and branch cable television distribution network (320). The central modem (332) communicates to remote modems (408). The remote modems can be placed in communication with a downstream device (such as a personal computer) (420) to allow the downstream device (420) to communicate with the central modem and ultimately with a wide area network such as the Internet (504).
Abstract:
A system and method supplies internet protocol television (IPTV) services to a subscriber. A content management subsystem processes and executes integrated workflow functionality for content management of video data to be delivered from a video headend to a subscriber premises. An infrastructure subsystem performs signal processing and routing of the video data from the video headend across the network to subscriber premises based on subscriber requirements at the subscriber premises. A network management, test and monitoring subsystem is coupled with the content management and infrastructure subsystems and includes test and management equipment and control and monitoring systems equipment for monitoring network performance and controlling the infrastructure subsystem and optimizing network performance and video delivery to the subscriber premises.
Abstract:
The present invention provides methods, systems, and apparatus that allow at least two end-point IP telephony devices (12,16) to synchronize multiple data streams conforming to mutually-exclusive signaling protocols into a single video telephony connection. An audio-only data stream conforming to an audio-only signaling protocol (14) (such as PacketCable NCS) is combined with at least one video data stream conforming to one or more video signaling protocols (22) (such as SIP or H.323) to produce a single IP telephony connection. Methods, systems, and apparatus are provided to establish an audio portion, a video portion, and optional data stream portions of a single IP telephony session.