Patent ID: 8042019
Filing Date: 2011-10-18
Classification: G06F,H03M,H04H,H04L,H04N

Abstract:
1. A broadcast transmitting system, comprising: a block processor for encoding mobile service data at a coding rate of 1/H, wherein H is an integer greater than 1; a group formatter for mapping the encoded mobile service data into at least one region of a data group that has a plurality of regions, wherein the data group further includes a plurality of known data sequences, wherein at least two of the plurality of known data sequences differ from each other in length, wherein at least two of the plurality of known data sequences are spaced 16 segments apart, wherein one of the plurality of known data sequences includes a first M-symbol sequence and a second M-symbol sequence that have a first pattern, and the rest of the plurality of known data sequences include an N-symbol sequence that has a second pattern other than the first pattern, and wherein N is greater than M; a trellis encoder for trellis encoding data being outputted from the group formatter, the trellis encoder having at least one memory that is initialized at a start of each known data sequence; a multiplexer for multiplexing the trellis-encoded data with segment synchronization data and field synchronization data; and a modulator for modulating a broadcast signal including the multiplexed data.