Abstract:
A receiving circuit module and method for operating the same includes a housing receiving a first signal, a first encoder disposed within the housing encoding the first signal to form a first encoded signal and a second encoder disposed within the housing encoding the first signal to form a second encoded signal having a different format than the first signal.
Abstract:
The disclosed embodiments relate to a system and method for processing digital communication signals. An exemplary system (100) comprises a first input adapted to receive a first digital communication signal (103a), a second input adapted to receive a second digital communication signal (103b), an upconverter (102) adapted to generate a multichannel digital signal that incorporates data corresponding to the first digital signal (103a) at a first frequency and data corresponding to the second digital signal (103b) at a second frequency, and a digital-to-analog converter (108) adapted to convert the multichannel digital signal to a multichannel analog signal.
Abstract:
A method and a system are provided for use in a satellite communications network in which broadcasting services are provided to a mobile terminal. The method comprises: duplicating bits comprised in communications which the satellite is about to broadcast, thereby forming a first stream of bits and a second stream of bits; conveying the first stream of bits in an encoded form along a satellite channel whereas the second stream of bits is conveyed in an encoded form along a terrestrial channel; and combining bits conveyed along the satellite channel with bits conveyed along the terrestrial channel in order to obtain a combined stream of bits.
Abstract:
The invention relates to a method for synchronizing a radio receiver to radio signals, according to which a locating signal, preferably a GPS signal, is used for correcting the synchronization of the radio receiver to the received radio signals. The correction is carried out with a filter that can preferably be a Kalman filter. The locating device determines a velocity vector and/or corrects the on-board clock pulse if necessary.
Abstract:
A method of processing an LNB power supply output signal (22) comprising providing an LNB selection signal to select a first of the plurality of LNB signals as the input signal, superimposing a tone onto the LNB selection signal to select a second of the plurality of LNB signals as the input signal, providing a first transponder selection voltage to select a first set of transponders within the input signal, providing a second transponder selection voltage to select a second set of transponders within the input signal, and activating an adaptive load (40) to preserve the tone if the second of the plurality of LNB signals is selected.
Abstract:
The invention relates to a ground station (10) for generating a data stream (20) that comprises a main program and an additional program. Said ground station comprises a memory (12) that stores the additional program, which is for example a commercial, while the main program is a radio program produced in a sound studio. The ground station further comprises a multiplexer (14) with a first input (14a) for receiving the main program and a second input (14b) for receiving the additional program from the memory, and with an output. A control device (16) for controlling the multiplexer (14) switches, at a first interval, an output (14c) of the multiplexer (14) from the first input to the second input and at a second interval from the second input back to the first input, thereby inserting the additional program into the main program between the first interval and the second interval. The ground station further comprises a transmitter device (18) that is connected to the output of the multiplexer (14) on the input side and that is connected to a transmitting antenna (22) on the output side so as to provide the transmitting antenna with the data stream (20). The inventive method provides a simple means for inserting commercials into the data stream without requiring special devices in the sound studio. The ground station can easily detect at which intervals commercials were inserted. The commercials can be exchanged or updated via an optional remote maintenance device of the ground station with little effort.
Abstract:
The disclosed embodiments relate to a system and method for processing digital communication signals. An exemplary system (100) comprises a first input adapted to receive a first digital communication signal (103a), a second input adapted to receive a second digital communication signal (103b), an upconverter (102) adapted to generate a multichannel digital signal that incorporates data corresponding to the first digital signal (103a) at a first frequency and data corresponding to the second digital signal (103b) at a second frequency, and a digital-to-analog converter (108) adapted to convert the multichannel digital signal to a multichannel analog signal.
Abstract:
The invention includes a mostly conventional digital television system (2000) to transmit compressed digital signals. A multiplexer (2004) receives a plurality of further input signals, assembles one or more transport streams and transmits compressed digital signals to a transmitter (2008) of the broadcast centre via linkage (2010). The transmitter (2008) transmits electromagnetic signals via uplink (2012) towards a satellite transponder (2014), where they are electronically processed and broadcast via notional downlink (2016) to earth receiver (2018). The signals received by receiver (2018) are transmitted to an integrated receiver/decoder (2020) connected to the end user's television set (2022). The receiver/decoder (2020) decodes the compressed MPEG-2 signal into a television signal for the television set (2022). A conditional access system (3000) is connected to the multiplexer (2004) and the receiver/decoder (2020), and is located partly in the broadcast centre and partly in the decoder. It enables the end user to access digital television broadcasts from one or more broadcast suppliers. A smartcard, capable of decrypting messages relating to one or several television programmes sold by the broadcast supplier, can be inserted into the receiver/decoder (2020). Using the decoder (2020) and smartcard, the end user may purchase commercial offers in either a subscription mode or a pay-per-view mode. A number of features of particular interest are disclosed, involving the randomization of EMMs, mixing parameter length and identifier on EMMs and the like to save space, dynamic allocation of bandwidth for specific EMMs, and the STM being separate from the SMS.
Abstract:
A satellite direct radio broadcast system (10) assemblies bits of broadcast programs into prime rate increments assembled into a frame (100). Frames (100) are divided into symbols which are demultiplexed into a plurality of prime rate channels (110). The prime rate channels (110) are demultiplexed into corresponding broadcast frequencies (21) for transmission to a satellite (25). An on board demultiplexer (144) separates uplink signals into time division multiplexed streams of symbols (154). A phase shift keying demodulator (146) demodulates the symbols into digital baseband data. The satellite payload switches the symbols into time division multiplexed data streams using two ping-pong buffers (156) and a routing switch (172). The receivers (29) process TDM streams using frame preambles and control channels provided by the satellite (25) and service control headers provided by broadcast stations (23, 24). A management system is provided to manage the satellite (25) and broadcast stations (23, 24).
Abstract:
Provided is an apparatus and method for transmitting/receiving multiband broadcasting using scalable video coding, which can solve a limitation of a transmission band in a multichannel satellite broadcasting service and increase availability of a satellite broadcasting service by scalably encoding video data and transmitting the data using a different transmission band for each layer. The apparatus for transmitting multiband broadcasting using scalable video coding includes: a scalable video encoder for scalably encoding video data to generate a scalable video stream having multiple layers; a multiplexer for multiplexing the scalable video elementary stream having multiple layers, a compressed audio elementary stream, and program specification information to generate a transport stream (TS); and a multiband transmitter for separating packets of the TS into multiple TSs according to pre-given priority information and transmitting the packet streams using a different transmission band.