Abstract:
The present invention provides a method of transmitting broadcast signals. The method includes, formatting, by an input formatting block, input streams into plural PLPs (Physical Layer Pipes); encoding, by an encoder, data in the plural PLPs; time interleaving, by a time interleaver, the encoded data in the plural PLPs, wherein the time interleaving includes: cell interleaving, by a cell interleaver, the encoded data by permuting cells in a FEC (Forward Error Correction) block in the plural PLPs; frame mapping, by a framer, the time interleaved data onto at least one signal frame; and waveform modulating, by a waveform block, the mapped data in the at least one signal frame and transmitting, by the waveform block, broadcast signals having the modulated data.
Abstract:
The present invention provides a method of transmitting broadcast signals. The method includes, formatting, by an input formatting block, input streams into plural PLPs (Physical Layer Pipes); encoding, by an encoder, data in the plural PLPs; time interleaving, by a time interleaver, the encoded data in the plural PLPs, wherein the time interleaving includes: cell interleaving, by a cell interleaver, the encoded data by permuting cells in a FEC (Forward Error Correction) block in the plural PLPs; frame mapping, by a framer, the time interleaved data onto at least one signal frame; and waveform modulating, by a waveform block, the mapped data in the at least one signal frame and transmitting, by the waveform block, broadcast signals having the modulated data.
Abstract:
A method and an apparatus for transmitting broadcast signals thereof are disclosed. The apparatus for transmitting broadcast signals comprises an encoder for encoding DP (Data Pipe) data corresponding to each of a plurality of DPs, a mapper for mapping the encoded DP data onto constellations, a time interleaver for time interleaving the mapped DP data at DP level, a frame builder for building at least one signal frame including the time interleaved DP data, a modulator for modulating data in the built at least one signal frame by an OFDM (Orthogonal Frequency Division Multiplex) scheme and a transmitter for transmitting the broadcast signals having the modulated data.
Abstract:
A method for generating and processing a broadcast signal according to an embodiment of the present invention includes encoding broadcast data for one or more broadcast services, encoding first level signaling information including information describing properties of the one or more broadcast services, encoding second level signaling information including information for scanning the one or more broadcast services and generating a broadcast signal including the broadcast data, the first level signaling information and the second level signaling information, wherein the first level signaling information includes user service description (USD) information describing service layer properties with respect to the broadcast services, wherein the USD information includes capability information specifying capabilities necessary to present broadcast content of the broadcast services.
Abstract:
A method for providing a service based on hybrid networks including a broadcast network and a broadband network in a digital transmitter, includes generating multiple service components of the service and service layer signaling (SLS) information for the service; generating data for providing bootstrap information that allows a receiver to discover the SLS information for the service; transmitting a first signal comprising a first service component among the multiple service components, the SLS information and the data via the broadcast network, wherein the first service component is carried via a first Layered Coding Transport (LCT) channel included in a Real-time Object delivery over Unidirectional Transport (ROUTE) session, wherein the bootstrap information included in the data is used to represent a second LCT channel that carries the SLS information; and transmitting a second signal comprising a second service component among the multiple service components via the broadband network.
Abstract:
A method for processing a broadcast service at a Primary Device (PD), and which includes performing a discovery process with a Companion Device (CD) application in a CD by receiving a discovery request from the CD and providing an endpoint for a WebSocket server of the PD; establishing a connection between the WebSocket server and the CD application based on the endpoint; in response to receiving a query for a current service from the CD, transmitting a response for the current service to the CD application based on the connection; receiving a broadcast signal having signaling information including flag information to obtain emergency data in the broadcast signal; and time de-interleaving Forward Error Correction (FEC) blocks including the emergency data based on a Time Interleaving (TI) block, wherein the FEC blocks are de-interleaved based on position for one or more virtual FEC blocks and the FEC blocks. In addition, the signaling information further includes information for a maximum number for the FEC blocks. The method also includes transmitting a notification message including the emergency data to the CD.
Abstract:
A method of processing a broadcast signal in a broadcast receiver includes receiving the broadcast signal including service data of a service, first signaling information for fast channel scans and service acquisition, and second signaling information providing information for discovery and acquisition of the service data. Further, the first signaling information includes bootstrap information for the second signaling information, identification information for identifying the service, category information for indicating a category of the service and capability information specifying a capability required to decode the service data. In addition, the second signaling information is carried in a Layered Coding Transport (LCT) channel that is identified by a Transport Session Identifier (TSI), and the bootstrap information includes address and port information for access of the second signaling information. The method also includes acquiring the service data based on at least the first signaling information or the second signaling information; and decoding the service data.
Abstract:
An apparatus for transmitting a broadcast signal includes a processor configured to format a plurality of Internet Protocol (IP) packets to output one or more Physical Layer Pipes (PLPs). Further, the plurality of IP packets includes signaling information for listing broadcast service, a content component for a broadcast service and service signaling information, the service signaling information including format information representing a payload format of an object; and a time interleaver configured to time interleave data in a PLP based on a Time Interleaving (TI) block. In addition, the TI block including data FEC blocks, and a number of the data FEC blocks is equal to a difference between a maximum value for the TI block and a number of virtual FEC blocks; and a transmitter configured to transmit the broadcast signal including the time interleaved data. Further, the signaling information is transmitted at an IP packet level, and the service signaling information is transmitted through transport packets included in the IP packets.
Abstract:
A method for transmitting a broadcast signal by a transmitter includes generating first service data, and second service data; generating service signaling data including an extended User Service Description (USD); encoding the first service data, the second service data, and the service signaling data; time interleaving the first service data, and the second service data, and the service signaling data in a memory based on one or more virtual position information; frequency interleaving the first service data, the second service data, and the service signaling data based on an interleaving sequence that is generated by checking a sequence that is generated based on an offset and a bit sequence; and transmitting the service signaling data, the first service data and the second service data.
Abstract:
A device for processing a broadcast signal, includes a tuner configured to receive the broadcast signal carrying a bootstrap prefixed to the beginning of a signal frame, the bootstrap including one or more bootstrap symbols, a last bootstrap symbol immediately followed by a preamble of the signal frame including bootstrap termination information, the bootstrap including first information for representing a structure of the preamble; a demodulator configured to demodulate the broadcast signal; a de-framer configured to de-frame the signal frame in the broadcast signal to output the preamble and PLP data, the preamble carrying Layer 1 (L1) signaling data for the signal frame; a signaling decoder configured to decode the L1 signaling data; and a decoder to decode the PLP data based on the L1 signaling data.