Patent ID: 8340133
Filing Date: 2012-12-25
Classification: H04H,H04N

Abstract:
1. A method of processing a digital broadcast signal in a transmitter, the method comprising: pre-processing enhanced data, the pre-processing comprising: forming an Reed Solomon (RS) frame including parity data and cyclic redundancy check (CRC) checksum data, the RS frame is comprised of a plurality of rows including the enhanced data, each of the rows having same size, wherein the forming the RS frame comprises: performing an RS encoding to the enhanced data in a column direction of an RS frame payload to add the parity data for each of columns in the RS frame payload; and performing a CRC coding to the RS encoded enhanced data in a row direction of the RS frame payload to add the CRC checksum data for each of the rows in the RS frame payload; formatting enhanced data packets including the enhanced data in the formed RS frame; multiplexing the enhanced data packets with main data packets having main audio and video (AV) data; performing systematic RS encoding to data in the multiplexed main data packets and non-systematic RS encoding to data in the multiplexed enhanced data packets; performing trellis-encoding to the systematic or non-systematic RS encoded data at a trellis encoder, the trellis encoder having at least one memory, the at least one memory being initialized at a beginning of a known data sequence; multiplexing field synchronization data and segment synchronization data with the trellis-encoded data; modulating the multiplexed field synchronization data and segment synchronization data with the trellis-encoded data; and transmitting the modulated data.