253 results about "Satellite broadcasting" patented technology

In conventionally receiving satellite broadcasting (BS, CS) and terrestrial broadcasting (VHF, UHF) services, transmitting the services to a plurality of TV receivers in an individual house results in complicated wiring and a community house is also limited in the number of installed TV receivers due to previously setting a distributor and thus requires an additional distributor to be installed when a TV receiver is additionally installed. The milliwave receiving and transmitting system of the present invention allows a broadcast signal to be transmitted and received indoors via indoor, wireless milliwave transmission without using any indoor wiring.

The present invention relates to an information providing apparatus and an information providing method. The display is switched through a transit screen based on a zoom-in screen or a zoom-out screen of a menu screen, and the menu screen is scrolled so as to display a focused icon at a predetermined position. In this manner, the present invention can be applied to a set-top box for digital satellite broadcasting, and the operationality can be improved even in case of providing a large number of programs and the like.

A system for locating a person including a mobile transmitter removably secured to the person and a portable monitoring unit carried by a user monitoring the location of the person. The mobile transmitter receives GPS ranging signals from GPS satellites. Each of the GPS ranging signals includes an offset proportional to the distance of the mobile transmitter from the respective GPS satellite broadcasting the GPS ranging signal. The GPS ranging signals, including the respective offsets, are transmitted to the portable monitoring unit. The portable monitoring unit comprises a GPS circuit which determines the location of the mobile transmitter based on the GPS ranging signals received by the mobile transmitter, and superimposes the location of the mobile transmitter on a map displayed on the portable monitoring unit.

In order to receive satellite broadcasting (BS and CS) and terrestrial broadcasting (VHF and UHF), complicated wiring is required in a personal residence for transmitting broadcasting signals to a plurality of TV receivers while new distributors must be additionally set for installing additional TV receivers in a condominium previously provided with distributors limiting the number of settable TV receivers. The inventive millimeter wave communication system forms power supply paths by simply connecting a BS/CS antenna with a millimeter wave transmitter and connecting an electronic apparatus such as a TV receiver with a millimeter wave receiver through connectors or the like while transmitting/receiving broadcasting signals by millimeter wave radio communication without employing wires such as coaxial cables indoors.

A fiber to the home (FTTH) system based on a passive optical network (PON) includes an optical line terminal (OLT) block, an optical network terminal (ONT) block, and an optical distribution network (ODN). The ONT block includes a video-optical line terminal (V-OLT) and an optical line terminal (OLT) in order to output optical signals of the video-optical line terminal (V-OLT) and the optical line terminal (OLT) by multiplexing the optical signals. The VOLT receives cable TV, master antenna TV, and satellite broadcasting optical signals inputted from a broadcasting service network so as to output received signals as a first optical signal having a predetermined wavelength band. The OLT includes a first downstream data optical transmitter and a first upstream data optical receiver and outputs a data communication signal inputted from a data service network as a second optical signal having different wavelength from the video-optical line terminal. The ONT block includes a video-optical network terminal (V-ONT) and an optical network terminal (ONT) in order to split multiplexed data communication signals, and cable TV broadcasting, master antenna TV broadcasting, and satellite broadcasting optical signals. The V-ONT processes the split cable TV broadcasting, master antenna TV and satellite broadcasting optical signals so as to provide subscribers with the split cable TV broadcasting, master antenna TV and satellite broadcasting optical signals. The optical network terminal (ONT) has an upstream data optical transmitter and a downstream data optical receiver so as to process split data communication signals. The optical distribution network (ODN) connects the optical line terminal block to the optical network terminal as an optical transmission medium.

In a broadcasting receiver, to quickly switch channels of the received multiplexed broadcasting signals at a high response speed to improve the convenience for a viewer, when broadcasting signals of a plurality of channels are to be code-division-multiplexed and broadcasted from a ground broadcasting station (BC1, BC2) to a broadcasting receiver (MS) in a service area via a geostationary satellite (SAT), the broadcasting signals are multiplexed and transmitted after matching the spreading code phase between the channels in the ground broadcasting station (BC1, BC2). Alternatively, the spreading code phase difference between the channels of a CDM broadcasting signal arriving from the ground broadcasting station (BC1, BC2) is detected in the geostationary satellite (SAT), and the broadcasting signal is transmitted to the broadcasting receiver (MS) after matching the spreading code phase between the channels on the basis of the detection result.

Receiving apparatus for receiving satellite broadcasting electric wave to be mounted mobile vehicle being realized at low cost and not influence by the weather etc. The apparatus is provided with an antenna of which directivity pattern can be varied, and by a geomagnetism sensor mechanically coupled with said antenna to detect present orientation of the antenna, and comprising antenna controlling means by which the directivity pattern of the antenna is directed towards objective broadcasting satellite based on said detected orientation output. When an electric wave from a gap-filler station is to be received, the antenna is controlled to become non-directivity pattern automatically. For the antenna, a microstrip patch antenna having a plurality of conductive patches arranged in a plane is used.

Disclosed is a system and a method for collecting various road traffic information, road image information, and position information of a position information generation device carried by an object, the position of which is to be tracked, by interworking with an information provision means and using the collected information to provide service subscribers with real-time traffic information, traffic prediction, or position information of the object via wireless Internet, satellite broadcasting, DMB, or cable data broadcasting. The system and method can provide detailed traffic information service regarding a specific region or location on a nationwide scale, predict traffic to properly deal with it, and easily provide position information of an object to be tracked.

The present invention is directed to high frequency, high power or low noise devices such as low noise amplifiers, amplifiers operating at frequencies in the range of 1 GHz up to 400 GHz, radars, portable phones, satellite broadcasting or communication systems, or other devices and systems that use high electron mobility transistors, also called hetero-structure field-effect transistors. A high electron mobility transistor (HEMT) includes a substrate, a quantum well structure and electrodes. The high electron mobility transistor has a polarization-induced charge of high density. Preferably, the quantum well structure includes an AlN buffer layer, an un-doped GaN layer, and an un-doped InAlN layer.

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.

An antenna switch apparatus and a switching method thereof including an antenna-input for cable broadcasting and an antenna-input for terrestrial broadcasting and satellite broadcasting, always receiving an OOB signal, and freely selecting one of a cable broadcasting channel and a terrestrial broadcasting channel or a satellite broadcasting channel is provided. In the antenna switch apparatus and the switching method, the terrestrial broadcasting signal is input to a select means, the cable broadcasting signal is split by a split means and the signals are input to an OOB tuner and the select means, then a signal selected by the select means is input to an A/D tuner. With this arrangement, one of the signal of the cable broadcasting channel and the terrestrial broadcasting channel or the satellite broadcasting is selected while keep receiving the OOB signal.

A satellite broadcasting receiver (LNB) receiving signal radio waves from broadcasting satellites is provided with a low noise amplifier (LNA) amplifying a received signal, and a frequency converting circuit converting an output from the LNA to an intermediate frequency signal for output. The LNA includes four amplifiers in the first stage respectively amplifying four types of different received signals. A power supply control circuit sets a current flowing through one of four amplifiers at a prescribed value and sets currents flowing through all the other amplifiers at 0. Thus, the output from only one amplifier is supplied to the amplifier in the second stage for amplification and further applied to the frequency converting circuit. Accordingly, the amplifiers in the first stage do not simultaneously consume currents, and a switching circuit is not necessary.

The invention relates to a method for realizing live broadcast of television news by using a wireless communication network. The method comprises the following steps of: establishing wireless connection with a media server by dialing; acquiring images and sound; encoding audio and video data; loading destination address information into the encoded data information to generate an IP data packet; performing real-time transmission through the wireless communication network; decoding the audio and video data information received by the media server; and converting the decoded information into an SDI signal and outputting the signal to a studio for playing. Compared with the prior art, the method has the advantages of replacing the majority of the functions of a satellite broadcasting vehicle and breaking through the limitation of time and region, along with low live broadcast cost and less limitation, and the method has the advantages that: no matter where and when a news event occurs, journalists can immediately rush to the field to carry out live video broadcast; and by the method, audiences can very easily participate in television media propagation, the television media has obvious propagation advantage, and the audiences can participate in the live program broadcast by using mobile phones, so that the video propagation advantages of the television media and the interaction of the audiences for immediately participating in the programs are shown.

This invention discloses a mobile satellite broadcast system and a method for realizing multimedia service transmission including: applying the OFDM technology to modulate input signals, which increases the usability of spectrum, besides, this invention applies LDPC mode for coding and the APSK technology for constellation mapping to further increase the usability of spectrums.

A hybrid antenna system for providing a communication service or/and a satellite broadcasting receiving service by coarsely tracking a target satellite in a mechanical fashion and finely tracking the target satellite in an electrical fashion is disclosed. The hybrid antenna system includes: a rotatory unit for tracking a satellite direction using a mechanical movement including a rotating motion and an electron beam tracking function and transmitting/receiving a multi-band frequency from a satellite through a free space; a stationary unit for communicating to an external terminal and/or transmitting and receiving a broadcasting signal from/to the external terminal; and a stabilizing unit for connecting the rotatory unit to the stationary unit, and driving and controlling the rotatory unit in mechanical fashion and electrical fashion.

Provided is a method for detecting frame sync and frame structure in a satellite broadcasting system. The method for detecting frame sync and frame structure includes the steps of: calculating differential correlation values of reception symbols; generating index sequences of reception symbols whose differential correlation values calculated above exceed a threshold value; calculating positions estimated as frame start points which correspond to a total frame number based on the number of symbols per frame for each frame structure; and detecting frame sync and frame structure based on the umber of positions where the above-calculated frame start point estimated positions and the above-generated index sequences are matched.

A system and method for providing program guide information to subscribers is disclosed. In one embodiment, the method is applied to a satellite broadcasting system having a first satellite broadcasting a first signal having a first set of program material and first program guide information describing at least a portion of said set of program material, and a second satellite broadcasting a second signal having a second set of program material and second program guide information describing at least a portion of said second set of program material, wherein the first broadcast signal and the second broadcast signal each include service channels uniquely described by a service channel identifier. The method comprises the steps of mapping at least a portion of the first program guide information to a first service channel of the first broadcast signal; mapping at least a portion of the second program guide information to a second service channel of the first broadcast signal, wherein the second service channel is logically offset from the first service channel; and transmitting the first signal to the subscriber.

Provided is a digital satellite broadcasting set-top box and a home network control system employing the same. The set-top box includes: a satellite signal receiving unit for receiving a satellite signal including a home network control signal for controlling the household appliances through a satellite broadcasting network from a remote terminal; and a control unit for extracting a household appliances control signal included in the satellite signal transmitted from the satellite signal receiving unit and commanding a power line converter to transmit the household appliances control signal to a corresponding household appliance, wherein the power line converter converts the household appliances control signal transmitted from the digital satellite broadcasting set-top box into a power line communication signal and transmits the power line communication signal on the home network through a power line.