Patent ID: 8229024
Filing Date: 2012-07-24
Classification: H04L,H04N

Abstract:
1. A method of transmitting a broadcast signal in a transmitter, the method comprising: performing RS (Reed-Solomon) encoding on enhanced data to build an RS frame; block processing data in the built RS frame according to a specific code rate; forming data groups including the encoded enhanced data, wherein at least one of the data groups includes a first, second and third area of the encoded enhanced data, wherein the second area is located between the first and third areas and known data sequences are inserted in the second area, and wherein the at least one of the data groups includes signaling information indicating the specific code rate; de-interleaving data in the formed data groups; forming data packets including the de-interleaved data; multiplexing the data packets and main data packets having main data; systematic RS encoding the main data in the multiplexed data packets and non-systematic RS encoding the enhanced data in the multiplexed data packets; interleaving the systematic and nonsystematic RS encoded data; trellis encoding the interleaved data and initializing a memory in a trellis encoder prior to each known data sequence; and transmitting the broadcast signal including the trellis encoded data.