Abstract:
Provided is an apparatus and a method for receiving a satellite broadcast. The method may include estimating a channel using signal-to-noise ratio (SNR) information being received, determining a video signal to be received among at least two video signals based on the estimated channel, and controlling selective reception of the determined video signal.
Abstract:
Provided is a data processing apparatus and method that may initialize baseband frame data that is newly input, and may randomize the baseband frame data based on a byte unit. Also, provided is a data processing system and method that may configure baseband frame data by randomizing the baseband frame data based on the byte unit in performing mode adaptation and stream adaptation with respect to a received transport stream (TS) packet, and may perform channel encoding of the baseband frame data.
Abstract:
The present invention relates to a method for transmitting a synchronization signal block (SSB) through a plurality of satellites from a base station that can connect to a plurality of gateways, wherein the method may comprise the steps of: controlling transmission of first SSBs corresponding to the number of beams of each satellite through respective transmission beams in a first SSB cycle; determining a transmission beam of each of the satellites on the basis of a first measurement report for the respective beams received from a terminal; and controlling transmission of second SSBs for determining one combination including two or more gateways among the plurality of gateways in a second SSB cycle.
Abstract:
A method according to an embodiment of the present invention corresponds to a method for transmitting, by a gateway, a synchronization signal block (SSB) through a plurality of satellites, and may comprise the steps of: determining satellite identification SSBs for identifying a plurality of satellites, respectively; determining beam identification SSBs for identifying beams usable for the plurality of satellites, respectively; and controlling the satellite identification SSBs and the beam identification SSBs to be transmitted to the plurality of satellites, respectively, through a predetermined resource, wherein the satellite identification SSBs and each of the beam identification SSBs have different SSB indices from each other.
Abstract:
Disclosed is a broadcasting transmission apparatus for simulcast broadcasting, including: a first stream generating unit configured to generate a first video stream by encoding video data; a second stream generating unit configured to generate a second video stream by encoding the video data; a PMT generating unit configured to generate a program map table (PMT) including a first descriptor that describes whether one or more programs included in the first video stream and the second video stream each are simulcast broadcasting targets and a second descriptor that describes video qualities of the one or more programs; a multiplexing unit configured to generate a first multiplexed stream and a second multiplexed stream by multiplexing each of the first stream and the second stream, and the PMT; a modulation unit configured to modulate the first multiplexed stream and the second multiplexed stream; and a transmission unit configured to transmit the modulated first and second multiplexed streams.
Abstract:
Provided is a satellite terminal controlling apparatus and method that may measure a packet loss rate of a return link at a central station, may determine a modulation and coding (MODCOD) value of the return link using the packet loss rate, and may control MODCOD of a satellite terminal with respect to the return link.