Apparatus for transmitting broadcast signals, apparatus for receiving broadcast signals, method for transmitting broadcast signals and method for receiving broadcast signals

摘要

A method and an apparatus for transmitting broadcast signals thereof are disclosed. The apparatus for transmitting broadcast signals comprises an input formatter to format at least one input stream to output DP (Data Pipe) data corresponding to each of a plurality of DPs, wherein the each of a plurality of DPs carries at least one service or at least one service component, an encoder to encode the DP data, a mapper to map the encoded DP data onto constellations, a time interleaver to time interleave the mapped DP data, a frame builder to build at least one signal frame including the time interleaved DP data, a modulator to modulate data in the built at least one signal frame by an OFDM (Orthogonal Frequency Division Multiplex) scheme and a transmitter to transmit the broadcast signals having the modulated data.

主权项

1. A method for transmitting broadcast signals, the method comprising:
formatting at least one input stream to output PLP (Physical Layer Pipe) data, wherein the input stream includes at least one null packet and input packets, wherein the formatting further includes:
removing sync byte from each input packet,deleting the at least one null preceding at least one input packet in the input streams,selectivity compressing the input packets by deleting common information of first headers of the input packets, wherein the common information is transmitted once in a data packet, andinserting a second header in front of the at least one input packet, wherein the second header is a header of the data packet and includes first information for a number of the deleted null packets; encoding the PLP data; mapping the encoded PLP data onto constellations; time interleaving the mapped PLY data; building at least one signal frame including the time interleaved PLP data; modulating data in the built at least one signal frame by OFDM (Orthogonal Frequency Division Multiplex) scheme; and transmitting the broadcast signals having the modulated data.